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Патент USA US2107902

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Feb. v8, 1938.
J. H; OLHDIE‘R
Q
. 2,107,902
SUPERVISORY CONTROL SYSTEM
Filed‘Sept. 12, 1933
4 Sheets-Sheet l
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HIGH
RESITANC
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MARE/HAL
C0ONTACS
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"’ Inventori
James :LjOh'v r",
am
109
'
is Attorney.
Feb. s, 1938.
'
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'
lawvE‘R
.
2,107,902
SUPERVI SORY CONTROL SYSTEM
' Filé‘gl Sept. 12, 1933
‘L
4 Sheets-Sheet 2
\
Invento?
James H.012 er:
b9
‘Hi' Attorney.
Feb. 8,1938.
2,107,902
.1. H. OLIVER
SUPERVISORY CONTROL SYSTEM
Filed Sept. 12, 1933
4 Sheets-Sheet 3
E
v
Invén’torl
James l-‘LOH er",
log“
,
23.9. “#1..
?ishAttqmeu
Feb. 8, 1938-.
,
J_ H_ OLIVER
2,107,902
SUPERVISOR‘! CONTROL SYSTEM
Filed Sept. 12, 1933,
4 Sheets-Sheet 4
Inventorl
James H.Oliver~;_
by
His v‘Ubo'r-rwegy
Patented Feb. 8, 1938
.
_
UNITED STATES ‘PATENT orifice ’
_
2,107,902,
j
SUPERVISORY CONTROL SYSTEM
James H. Oliver, Aidan, Pa., assignor'to General _
Electric‘company, a corporation of New York
Application September '12, 1932, Serial No. 689,087
11 Claims.
(01. 177-353)
My invention relates to supervisory control
systems for supervising and controlling appa-ratus in a remote station from a control station,
such as a dispatcher’s o?lce.
5
' , .
'
'
two-position control key such as CK—3 and
CK—-23 which controls the operation of the cor
responding indicating lamps. Each group of in
~ ' dicating lamps consists of'a red lamp such as
One object of my invention is to provide an
R-3 and'R_¢23~which when lighted indicates 5
improved two-wire supervisory control system
that the corresponding apparatus unit is in its
' , whereby a desired apparatus unit in a remote sta-
closed position, a green lamp such as G-3 and
'
tion may be selected by transmitting to the re-
(3-23 which when lighted indicates that the
~mote station a predetermined code of impulses
corresponding apparatus unit is in its open po
10‘_ over the two-line conductors. .‘I'he selection may
‘ be checked by transmitting over the two conductors to the control station a predetermined check
sition, a white lamp such as W-3 and W-23 l0
which when lighted indicates that the position
of jthlegncorrespinding apparatus unit does not
~ code corresponding to the selected unit, and the correspond with the position of the associate
‘
operation of the selected unit can be effected by control key and an amber lamp such as AM—3
15: an impulse transmitted over the two conductors I and AM-—23 which when lighted indicates that 15
only if the selected unit is the proper one.
Another object of my invention is to provide
an arrangement whereby in addition to acheck
‘ code being transmitted to the control station
20 after an apparatus unit has been selected, an in»
j dication of ‘the position of the selected unit is
also transmitted over the two-line conductors be-,
fore the selected unit can be operated.
I
Another object of my invention is to provide
25 an improved two-wire supervisory control system
of the above type which requires a minimum
amount of apparatus and a minimum amount of
time to eifect a desired supervisory and control
operation.
,
30
My invention will be better understood from
the .following description ‘when taken in con‘nection with the accompanying drawings and its
scope will be pointed out in the appended claims.
Referring to the drawings which comprise
35. Figs. 1 to 4 inclusive, su?icient. ‘apparatus and
the corresponding apparatus unit has been prop
erly selected for operation. -Each group of keys
and lamps has associated therewith an individual
indicating relay,‘ such as 7. IR~-3 and IR-23,
which determines by its position whether the as
sociated red or green lamp islighted and which 20
cooperates with the associated control key to de
termine whetherthe associated white lamp is
lighted.‘ The position of each indicating relay in
turn is determined by the position of the 00r- 25
responding apparatus unit’ in a manner which
will be hereinafter described. As shown in Fig.
1, the indicating relays IR—3 and IR—23 are in
the position they occupy when the corresponding
apparatus units are in their open positions and 30
the control keys CK-3 and CK-23 are also
shown in the corresponding positions so that the
green 1ampS.G—3 and (‘x-23 are lighted and the
other‘ lamps are notlighted. It will be seen that
if either controlkey should be moved to its other 35
circuits of a supervisory control system embod’y-
position, the, associate White lamp Would be
ing my invention have been shown by means of
lighted. _
the usual conventional diagrams to enable my
invention to be readily explained and understood.
40 The apparatus andicircuits shown in Figs. 1 and
2 are those located ‘in the control or dispatcher’s
o?ice while the apparatus and circuits shown in
.
~ ,
.
In Order that the Operation of any One Of the
select keys may effect the selection of the cor
responding apparatus unit, a suitable ?nder and 40
cede Selecter Switch | S and a Code sender 23 are
provided atthe. dispatehe'r’s Office for transmit
; Figs‘ g‘and 4 are those located at the remote sta- . ting to'the remote station over the line conductors
tion which is connected to the dispatcher’s of-.. L—# and L——2 a series of Seven current impulses,
45 ‘?ce by only two line conductors L—| and L'_2_
v In practicing my invention I provide at the
dispatcher’s voil‘ice a group of control keys and indicating lamps for each apparatus unit to be
selected and controlled in the remote station;
50 Inkorder to simplify the disclosure, only two
, groups of keys and lamps are shown. Each group
, of keys consists of a two-position select key. such
as SK-—3 and SK-23, which is operated by the
dispatcher when he desires to select a c0rre~
55 sponding apparatus unit for operation, and a
the respective polarities of which vary with the 45
unit to be selected. The ?nder and code selector
switch l S and the code sender 28 preferably are
selector switches of the well-known type which
co‘mprise. banks of twenty-?ve contacts, each
bank having associated therewith a cooperating 50
wiper. A suitable operating magnet is provided
for simultaneously moving all of the wipers in
a step~by-Stel9 movement Over the contacts of
the respective banks. Any other suitable switch
ing means, examples of which are well known in 55
2,107,902
2
the art may be used however. As shown in Fig. 1,
the switch IS consists of six blanks IS-I and
lS—6 inclusive, a cooperating wiper for each
bank and an operating magnet M—-I; and the
code sender 28 consists of six banks 2S--I to
2S—6 inclusive, a cooperating wiper for each
bank and an operating magnet M-—2.
Normally the switches IS and 28 are in their
pulses transmitted thereto the relays _2l!'——33’_ in
clusive are selectively operated to effect the se
lection of the desired apparatus unit.
After the selecting code of impulses has been
transmitted and correctly received bythe receiv
ing apparatus in the remote station, the opera~
tion of another selector switch 2S’, comprising
six banks ‘of twenty-five contacts 2S’-—l to
2S’-6 inclusive and an operating. magnet.l\1I’-2,
is effected. This selector switch 12S‘ has? a sepa 10
10 ings. Each of the other twenty-four positions of
rate position allotted to each apparatus unit; '
switch ES, except the twenty-fourth position, may As shown, positions 3 and 23 of this switch are
beallotted to a different apparatus unit so that ‘allotted to the apparatus units AU'-—3 ‘and
with the arrangement shown twenty-three dif
AU’-—23 respectively. These apparatus'units are
zero or normal positions, as shown in the draw
a
ferent apparatus units can be supervised and con shown as circuit breakers of the well-known 15
As shown, position 3 of the switch IS
type,"butit is obvious that each appa
is allotted to the apparatus unit corresponding to ‘latched-in
ratus unit may be any other suitable controlde
select key SK--3 and position 23 is allotted to
‘Each circuit breaker is provided with a
the apparatus unit corresponding to select key vice.
suitable closing coil, such as closing coil CC'-—3 20
SK-—23. When select key SK-3 is operated, the for apparatus unit AU’—-3 and closing coil
20 motor magnet M--I is arranged to be operated to
CC'-23 for apparatus unit AU"—‘23 and with a
e?ect the movement of the switch IS from its suitable trip coil such as trip coil TC'--3 ‘for ap
15 trolled.
normal position to its third position where it will ' paratus unit AU’-—3 and TC’-'-j23'ior apparatus
stop and remain as long as the switch’ SK-3 is
‘ maintained in its operated position. In similar
25 manner, when the select key SK—23 is operated
the operating magnet M—I operates to move ‘the
switch IS to its twenty-third position Where it
remains until the select key SK-—23 is restored
to its normal position. '
30
unit AU'—-23. Associated with each apparatus 25
unit is a control relay, such as CR'-3 and
CR’-423 ‘for apparatus units AU’—‘3 and'AU'-E3
respectively, which selectively controls the ener
gization of the closing and tripping coils of the
correspondingapparatusfunit. As shown, these
7
control relays are three-position polarized re
When the switch IS stops in any one of its
lays of thewell-known type whose armature re;
positions, it sets up a code individual to that po
sition. For example, when it stops in position 3 turns to its neutral position when the relay is
it sets up a code individual to the select key deenergized. The circuits of the control relay
SK—~3 and similarly when it stops in position 23,
35. it sets up a code individual to the select key '
SK-23.
'
At the dispatcher’s o?‘ice asuitable start'key
‘ST is provided which the dispatcher operates
after he has operated the selcct'key of the de
40 sired apparatus unit which he desires to operate.
The operation of this start key ST effects the
operation‘ of the operating magnet M—2 of the
code selector 2S so that this code selector moves
from its normal position to its 18th position.
45 During this operation of the code selector 2S a
circuit is completed for a code transmitting re
windings are respectively connected. to the con
tacts of bank 2S'-—5 allotted to the correspond-V
ing apparatus units. For example, the circuit of
the control relay CR'-3 can be completed only
through the third o?-normal contact in bank
2S’-5 and the circuit of control?relay, CR'-23 40
can be completed only throughthe twenty-third V
off-normal contact of bank 2S’-5.
,
In order to stop the selector switch 2S’ in the
position corresponding to the apparatus unit se
lected, the relays 2S’-33' are arranged to con
nect a potential to the contact in bank 2S’-2 ‘
which is allotted to the selected unit. When the
switch 2S’ reaches that position, the ‘relay ‘I’
is energized to open the circuit of the operating
lay CTR, which is a three-position polarized re
lay, through the wiper and contacts of the bank
2S--I when the switch 25 is in positions 3, 5, '7, magnet M’-2 so as to cause the switch 2S’ to 50
9, ll, 13, and 15. The direction of the current 'remain in that position.
?ow through these circuits of the code-trans
mitting relay CTR. depends upon the position of
the; code selector switch IS. When a positive
potential is connected to a contact of bank ZS-I,
the code-transmitting relay CTR operates in a
_ direction to cause a positive impulse to be trans
At the remote station there is also a ?nder and ,
a code selector switch 3S’ which is_similar in.
construction and operation to the ?nder and code
selector IS in the dispatcher’s o?ice. The switch 55
3S’ is controlled by the operation of the switch
2S’ so that they always occupy corresponding
positions. Therefore, when the switch 28' vis
mitted over the line conductors L-'—I and L—-2
and when a negative potential is connected to a moved to the position allotted to a "selected appa
ratus unit, the switch 38' is moved to the corre
contact of bank 2S-'—I the code-transmitting re
lay CT'R operates to cause a negative impulse to sponding position and sets up the code of im
7
.
betransmitted over the line' conductors. In this pulses of the selected apparatus unit.
As soon as both of the switches 2S’ and 3S’
manner a series of seven positive and negative
impulses is transmitted to the remote station'to have reached the, positions allotted to the se
lected apparatus unit, a code, sender As’ is oper
select the desired apparatus unit.
7
ated in the remote station to transmit over the
At the remote station this series of seven posi
line conductors L~—I and L-—2 the code of im-'
tive and negative impulses energizes a code
responsive relay CRR" which is a three-position pulses set up by the switch 3S’; This code se
lector 4S’ comprises six banks of twenty-?ve con
polarized relay. Each energization of the code
responsive relay ORR’ effects the operation of a
selector switch IS’, comprising six banks of
twenty-?ve contacts lS’—I to IS’-—B'inclusive
and an operating magnet M’—-I, and the ener
gization of one of the selective relays ZIP-33’ .
inclusive so that in response to the code of im
tacts 4S'-I to 4S'—6 inclusive and an operat~
ing magnet M'—-4. During the operation of this
code sender from its normal position to its
twenty-second position, a circuit is ?rst, coni~
pleted for a transfer ‘relay 35' to transfer the
line conductors L-—! and L742 at the remote
2,107,902"
station from the code-receiving relay CRR' to
the core-transmitting relay CTR’ which is a
three-position polarized relay.‘ vAfter this change
‘10
in connections has been established, a series of
seven positive and negative impulses is trans-v
mitted to the winding of the code-transmitting
relay CTR’ which causes a corresponding series
of'impulses to be transmitted over the line con
ductors L-—l and L—2 to thedispatcher’s o?ice.
,VAt the dispatcher’s of?ce theseimpulses oper
ate'a code-responsive relay CRR, which is a
‘three-position polarized relay. Each operation
of the code-responsive relay CRR effects the op
eration of a selector switch 35 comprising four
20 banks of twenty-?ve contacts 3S-l to 38-4 in
clusive and an operating magnet M-3 and the
selective operation of a group of selector‘relays
10526 inclusive. After this series of impulses has
been transmitted,_circuits are completed by the
operated control relays in" the 'dispatcher’s office
for the amber lamp and the indicating relay asso
ciated with the operated select key and for a
common, check relay Ida. _ The lighting of the
amber lamp informs the dispatcher that the se
lection has been properly made and the opera
tion of the indicating relay‘ checks the indicat
,'ing lamps and effects any change that "is neces
sary" in order to make them correspond with the
‘positionyof the corresponding apparatus unit.
The energization of the check relay ‘l4a prepares
a circuit whereby the dispatchermay now oper-l
‘ ate the selected apparatus unit.
For operating a selected apparatus unit a two
pos'ition operate key 0K is provided at the dis
patcher’s o'i?ce. After receiving‘ the indication
that the proper apparatus unit has been selected,
the dispatcher ?rst moves the control key of the
selected apparatus unit to the position corre
sponding to the one to' which he wantsito' op
erate the apparatus unit and then he operates
the operate key OK. A circuit is then completed
‘for a predetermined time interval for a control‘
relay l6a which when energized disconnects the
I 50*
nected across the line conductors so that it is
ready to receive the next control impulse.
At the dispatcher’s ofiice the indicating impulse
operates the code-receiving relay CRR in the
proper direction to cause the indicating relay cor~
responding to the selected apparatus unit to move
the position corresponding to the new posi 10
theposition of the selected apparatus unit is .to
tion of the selected apparatus unit. The indi
transmitted to the code-transmitting relay‘ CTR" cating relay in turn controls the circuits of the
‘ over the line COIld'llCtOl'Sv ~
40
o?'ice. After this indicating impulse has been
transmitted for a predetermined time, the receiv
ing equipment at the remote station is again con
Then ?nally apolarity'impulse corresponding to
' ‘ which in. turn transmits .a'cor'responding impulse
15
3.
code-receiving relay CRR from the line conduc
tors L-—I and L—2 and connects‘the line con
ductors to the battery BAT so that a negative
‘impulse is transmitted over the line conductors.
, As long‘as this operate impulse is being trans
'mitted, an operate lampv 0L is lighted in the dis
, patcher’s o?ice.
'
‘
Atthe remote station this negative impulse ef
fects the operation of the code-receiving relay
CRR’ which in turn effects the connection of the
proper polarity to the winding of the polarized
60 control relay of the selected apparatus unit so
that it in turn effects vthe desired operation of the
selected apparatus unit. When the operate im
pulse is cut on‘ from the line conductors L—-l and
L—'2, the code-responsive relay CRR in’ the dis
patcher’s office is reconnected‘ across the line
conductors and in the remote station the trans
fer relay v35f is energized for a predetermined
time to disconnect the code-receiving relay CRR'
from the line conductors and to connect the line
conductors‘ to the contacts of the ' code-‘transmit
ting relay CTR'.' The code transmitting relay
' CTR'_ is then energized in accordance with the
new position of the selected apparatus unit and
causes an indicating impulse ‘corresponding to this
' new position to be transmitted tov the'dispatcher’s
lamps corresponding to‘ the selected apparatus
unit so that they indicate the new position there
of_.
.
I.
s
_
.i
1
.
The dispatcher may operate the selected appa
~15
ratus unit as many? times as desired by succes
sively operating the operate key before the selec~
tion is released. ‘7 After each operation, the cor
responding signalling lamps are operated to in 20
dicate the new position of the operated unit.
After the last‘ operation has been performed,
the dispatcher can release the selection and re
storethe apparatus to normal merely by restor-~
ing the’ operated select key to its normal posi
tion. As soon‘ the apparatus reaches its zero
position, an alarm ALM is operated and a start
lamp STL is lighted to indicate that the system is
ready for a new operation.
j Iii‘orde'r that-any-chang'e-in the position of
an apparatus unit, not e?ected‘by the dispatcher,
may also be indicated in the1"dispatcher’s o?'ice,
each apparatus unithas associated therewith an
indicating relay, such as relay IA’—-3 and
IA'—23 for apparatus unit AU'—-3 and AU’—23 ‘
respectively, which operates in response to each
change‘ in the position of the associate apparatus
unit to cause the‘ switchZS’ to'move to the posi—~
tion thereof allottedito the apparatus unit which
has changed its position. Switches 38' and 48’ 40
then operate to e?ect the transmission of the
code of impulses corresponding to the operated
apparatus unit and an impulse corresponding to
the‘ new position thereof. At the dispatcher’s
office these impulses effect the operation of the 45
selector switch 38 and of the relays'I?-ZS in
clusive so that an alarm ALM is operated to in
form the dispatcher that, an apparatus unit has
changed its position andthe indicating relay cor
responding to the operated apparatus unit is op
erated to the position corresponding to the new
position of'the apparatus unit. The indicating
lamps corresponding to the operated apparatus
unit are thereby lighted in, accordance with the
new position thereof and the associate white lamp 55
is lighted to indicate to the'dispatcher which unit
has changed its position. The dispatcher can
extinguish the white lamp by moving the asso
ciate control key to the position corresponding
to the new position of the unit.
The alarm ALM'is controlled by a two-posi
tion keyAK. With this key AK in oneposition,
the alarm operates continuously when an appa
ratus unit changes its position. When the alarm
key AK is in its other position, the alarm is op
erated for only a short time. The continuous
operation of the alarm may be stopped by the operator moving the alarm key to its other position.
The detailed ‘operation'of the systemshown is
as follows: With the system at rest and in an
operative condition, a circuit is completed for the
start lamp STL through the contacts I00 of the
zero position check relay I which is energized.
At the remote station'when'both of the switches
IS’and 48’ are in their normal positions, a cir
4;.
2,107,902‘v
cuit is completed from the positive terminal of a
battery BAT’, through the wiper and normal con
tact of bank IS’-4, conductor 400, winding of
relay I’, wiper and normal contact of bank
4S’—4, to the negative terminal of battery. BAT’,
By closing its contacts 300 and 306, the relay I’
completes‘ a check circuit through the line con
ductors L—I and L.—2 from the positive terminal
of the battery BAT’, through contacts 30B of
10 relay I’, conductor 30I, contacts 302 of relay I2’,
conductor 303, winding of code-receiving relay
,CRR', conductor 40I,'contacts 304 of transfer
relay35’, line conductorL-—I, contacts IOI of re
lay IBa, conductor I02, contacts I03 of why“,
151 winding of code-receiving relay CRR, wiper and
normal. contact of bank 2S-3, line conductor
L—2, contacts '305 of transfer relay 35', contacts
7 300 of relay If to the negative terminal oi the
battery BAT’. The direction of current flow in
20 this circuit is such that the contacts 402 of relay
ORR’ and contacts I04 of relay CRR. are closed.
The closing of the contacts 402 completes a cir
out from the positive terminal of battery BAT",
through winding of relay 3', contacts 402 of relay
25 ORR’, wiper and normal contact of bank IS'--2,
conductor>465, winding of relay 36' to the nega
tive terminal of battery BAT’. By closing its
contacts403, the relay 3' completes an obvious
circuit for the relay 4'.
,In the dispatcher’s omce, the relay CRR com
30'
pletes a circuit from the positive terminal of
the battery BAT, through the winding of relay
‘I, conductor 200, contacts I04 of relay CRAR, con.
ductor I05, wiper and normal contact of bank
3S-—I, conductor 2I0I, winding of checkrelay I,
conductor I06, wiper and normal contact of bank
2S—4 tothe negative terminal of the battery BAT.
35
Contacts 202 ‘of relay ‘I complete an obvious cir
cuit ‘forrelay 0 which is of the slow-to-drop-out
40 type. Contacts I00 of relay I complete the con
tacts of the start lamp» STL and the contacts
I01 complete a holding circuit for the alarm relay
_
50
55
65
'
through the relay 5 and the operating magnet
M'—I to e?ect the operation of the operating mag
net. However, relay 5 operates and by closing
its contacts II2 connects the seventh off-normal
contact of bank 2S—I to the negative terminal
of battery BAT.
This relay 5 is common to a
number of select keys, not shown, and is arranged
so that when any one of these particular select
keys is operated, the seventh off-normal contact
of bank'2S—I isdisconnected from the positive
10'
terminal of batteryBAT and is connected to the
' negative terminal thereof.
In-positions 1-23 of switch IS a circuit is com
pleted through the wiper of bank IS—5, winding
of relay 4 whichis of the slow pick-up type, con
15
tacts II3 of emergency resetkey ERK, wiper and
normal contact of bank 2S--)2 to the neutral ter
minal of batteryBATf Since adjacent contacts
of bank IS—-5 are connected to- opposite'termi
nals of battery BAT, the reversals of current
which occur through the winding of relay 4 pre
vent the relay from picking up during the notch
ing operation of the switch. After the switch IS
stops in its '23rd,position howeverrthe relay 4'
picks up and completes through its contacts ‘I I4 25
a locking circuit for itself which is independent
of the wiper of bank 2S—2 so that the subsequent
movement of switch 2S does not result in the de
energization of relay 4. By opening its contacts
II5, the relay 4 disconnects the 18th off-normal
contact of bank 2S—V-6 from the negative ter
minal-of battery BAT.
‘
The -code corresponding .to apparatus unitj
AUf-23 is now set-up by the polarities im
pressed on the off-normal contacts 3, 5, ‘I, 9, 35
I I, I3, and I5 of bank 2S—I. With the p~articu~
lar arrangement shown in the drawings, the po
larity of the ?rst two impulses is ?xed and so the
o?-normal contacts '3 and 5; of bank 2S—I are
‘permanently connected to the positive terminal
of battery BAT. Since relay 5 is energized,
whenselect key SK-23 is operated, the 7th o?
contact of bank 2S—I is connected to the
2 through the contacts I08 of the alarm relay. normal
negative terminal of battery BAT. The polari
Since either a short circuit or open circuit on the '
line wires would deenergize the relay ORR in the ties connected to o?-normal. contacts 9, II, I3,
dispatcher’s oi?ce, and this relay in turn would and "are determined by thepositions. of the
deenergize the check relay I, it is evident that. wipers of banks IS—2, IS—3, IS'-4, IS-—5, re-,
when the start lamp STL, is lighted it indicates spectively. In the 23rd position of switch IS,
the wipers IS-—2 and IS'—5 are connected to the
that all of the equipment is in the zero or start
ing position and that the line wires L-—l and L-2 positive terminal of battery BAT and the wipers 50
IS-3 and IS-—4 are connected to the negative
are in an operative condition.
terminals
of battery BAT. Therefore, the code,
In order to describe the operation of the ar
apparatus unit AU"-23 is positive, positive,
rangement shown, it will be assumed that the for
negative, positive, negative, negative, positive.
apparatus unit AU’--23 is open and that the dis
After the dispatcher operates the select key
patcher desires to close this apparatus unit.
After ?rst observing that the start lamp STL is SK-23, he operates the start key ST so that
lighted, the dispatcher operates the select key contacts IIB are closed andv contacts I" are
SK-—23 corresponding to the desired apparatus open. A circuit is then completed from the nega
unit. The operation of this select key results in tive terminal. of battery BAT, through contacts
the opening of the contacts I09, and the closing Il6, conductor I I8, contacts II9 of relay 4, con
of contacts I I0 and II I. By opening contacts I09 tacts I20 of. checkrelay I, conductor I2I, wiper
and closing contacts IIO, a high resistance: relay and normal contact of bank 2S—I)‘, interrupter
5 is inserted between the 23rd contact of bank contact IC-a'2, winding of relay 6 to neutral ter
IS-l? and the positive terminal of battery BAT. minal of battery BAT. ,After a time delay relay
The closing of contacts III completes through the 6 closes its contacts I2Ia and completes an ener
gizing circuit for the operating magnet M—2 of
wiper and normal contact of IS—-6 and interrupt
er contacts IC--I an energizing circuit for the
operating magnet M--I. Magnet M—I then op
erates in a manner well known in the art to move
70 the selector switch IS from its zero position to
position 1 and then continues to move the switch
to its 23rd position since each contact of, bank
IS-B is normally connected to the positive ter
minal of battery BAT. When the 23rd posi
75 tion is reached, su?icient current does not flow
selector'switch 2S. , Magnet M—2 by opening its
interrupter contactsIC~2 interrupts the above
traced circuit for relay 6 so that relay 6 drops
out» and opens the energizing circuit, of the op 70
erating magnet M—2 "which causes the switch
2S to move from its normal position to position :
1. Since the off-normal contacts I-I'I inclusive
of bank 2S—6 are connected to the negative ter
minal of battery BAT, relay 6 and operating mag-, 75.
2,107,902
net M-2 are alternately energized and deener
gized to e?ect the movement of switch 28 from
position 1 to position 18 in which position the
circuit of relay 6 is open at the contacts I I5 of
relay 4. As selector switch 28 moves from, po
sition 1 to position 18, the wiper of bank 2S—I
engages the contacts to which the code impulse
potentials are applied and completes through
contacts I22 of relay 28 an energizing circuit for
10 the operating winding of the code-transmitting
relay CTR, which is a three-position polarized
relay.
4
When the wiper of bank 23 engages a con
tact which is connected to the positive terminal
15, of battery BAT, the code-transmitting relay CTR
is operated to close its contacts I23 and I 24 so
that the line conductors L-I and L-2 are con
.20
.nected to the positive and negative terminals of
battery BAT respectively, and when the wiper
of bank 2S—-iI engages va contact which is con
nected' to the negative terminal of battery BAT
the relay CTR closes its contacts I25 and I26 so,
that the line conductors L—-I and L—2 are con
nected to the negative and positive terminals of
25 battery BAT respectively.
,
When the selector switch 2S leaves its zero po
30
sition, the heretofore traced zero position check
circuit is interrupted by the wiper of bank 2S—3
leaving its normal contact. Therefore, the re
lays CRR and CRR’ becomes deenergized and
their armatures are restored to their neutral po
sitions. In the dispatcher’s o?lce, the opening of
the contacts I'04 of relay CRR e?ects the dean
ergization of the relays I, ‘I, and 8. The deen
35 ergization of the relays 1 and 8 has no eifect at
this time. By opening its contacts I00 the check
relay I extinguishes the start lamp STL and by
.40
opening its contacts I0'I it interrupts the circuit
of the alarm relay2. Although the alarm relay
‘closes its contacts I2'I, the alarm is not operated
at this time because the circuit thereof is open
at the contacts “1 of the start key ST.
In theremote station, the opening of the con
, tacts 402 of relay CRR’ interrupts the
45 described circuit of relays 3’ and 36’.
heretofore
Relay 3’
by opening its contacts 403 and closing its con
tacts 404 completes an energizing circuit for the
operating magnetML-I of ‘switch IS’ to effect
'50
the movement of this switch'from its zero posi
tionto position 1. This circuit is from the nega
tive terminal of battery BAT’ through contacts
404 of relay 3’, contacts 405 of relay 4’, wiper and
normal contact of bank IS’—6, winding of mag
net M’—I , interrupter contact IC’—I to the neu
' tral terminal of battery BAT’. Although the cir
cuit of relay 4’ is interrupted by the opening of
contacts 403, this relay 4', which is of the slow
drop-out type, is so adjusted that it maintains
the above-traced circuit for the operating mag
60 net M’—I completed for a su?’icient length of
time to effect the movement of the selector switch
IS’ to its ?rst position.
5
wiper and normal contact of bank 4S’--I, con
ductor 309, contacts 3I0 of relay I’ and contacts
305 of relay 35'. When the contacts I23 and
I24 of the code-transmitting relay CTR are closed,
the positive impulse which is transmitted over 5
the line conductors L—-I and L—-2 causes the
code-receiving relay CRR’ to close its contacts
406 and when the contacts I25 and I 26 of the
code-transmitting relay CTR are closed, the neg
ative impulse which is transmitted over the line 10
conductors L—I and L—-2 causes the code-receiv
ing relay CRR’ to close its contacts 402. There
fore, when the switch 28 reaches its third posi
tion and the code-transmitting relay CTR is 0p
erated to transmit a positive impulse, the code 15
receiving relay CRR’ completes a circuit from
the positive terminal of battery BAT’ through
winding of relay 3’, contacts 406, wiper and ?rst
contact of bank IS’—I, conductor 401, winding
of relay 22', conductor 408, contacts 409 of relay 20
36’ to the negative terminal of battery BAT’. Re
lay 22’gby closing its contacts 4I0 completes a
locking circuit for itself to the neutral terminal
of battery BAT’.
As soon as the switch 2S leaves
its third position and the positive impulse is dis 25
connected from the 'line conductors, relay 3’
closes its contacts 404 and completes a circuit
from the negative terminal of battery BAT’,
through contacts 404 of relay 3', conductor 4I2,
contacts 4“ of relay 22’, conductor 4I3, wiper 30
and ?rst contact of bank I S’—6, winding of mag
net M’—-I, interrupter contact IC’—I to the neu
tral terminal of battery BAT’. Magnet M’—I
then operates to move the switch IS’ .to its second
position.
When the switch 28 reaches its ?fth position,
the code-transmitting relay CTR again operates
to transmit a positive impulse over the line con
ductors so that the code-receiving relay CRR’
again closes its contacts 406. A circuit is now
completed from the positive terminal of battery 40
BAT’ through relay 3’, contacts 406, wiper and
second off-normal contact of bank IS'_I, con
ductor 4I4, winding of relay 23’, conductor 408,
contacts 409 of relay 36' to the negative terminal
of battery BAT’. By closing its contacts M5, the 45
relay 23’ completes a locking circuit to the neu
tral terminal of battery BAT’. When the switch
28 leaves its ?fth position, the second impulse is
cutoff and the code-receiving relay CRR’ op
erates to interrupt the circuit of relay 3’. By 50
closing its contacts 404, the relay 3’ completes a
circuit from the negative terminal of battery
BAT’ through contacts 404, conductor 4| 2, con
tacts MS of relay 23', conductor 4I‘I, wiper and.
second off-normal contact of bank IS’—-0, mag
net M’—-I, interrupter contact IC’—I to the neu
tral terminal of battery BAT’. Magnet M’-—I
then eifects the movement of switch IS’ to its
third position.
When the switch 28 reaches its seventh posi
tion, the third impulse which is a negative im
I Therefore, it will be seen that by the time the pulse is transmitted to the code-receiving relay
‘I selector switch 28 in, the dispatcher’s o?ice CRR’ so that this relay closes its contacts 402. A
“ reaches its third position, the selector switch IS’ circuit is then completed from the positive ter
in the remote station is in its ?rst position. E'ach ‘ minal of battery BAT’, through winding of relay 65
~ time the code-transmitting relay CTR is operated 3’, contacts 402 of relay CRR’, wiper and third
'to transmit an impulse, a circuit is completed for
the code-receiving relay CRR’ which is connected
across the line conductors L—I and L—2 through
‘contacts 304 of the transfer relays 35’, conductor
40I, winding of relay CRR’, conductor 303, con
tacts 302 of relay I2’, conductor 30I, contacts 301
of relay I’ which is deenergized as soon as switch
is’ leaves its normal position, conductor 308,
oiT-normal contact of bank IS’—2, conductor 4I8,
winding of relay 25', conductor 4I9, contacts 420
of relay 36’ to the negative terminal of battery
BAT’. By closing its contacts 42I, the relay 25’ 70
completes a locking circuit for itself to the neu
tral terminal of battery BAT’. As soon as the
switch 28 leaves its seventh position, the nega
tive impulse is cut off and relay CRR’ opens itsv
75
‘2,107,902
6
contacts 442 so that the relay 3’ is deenergized. A
circuit is then completed from the negative ter
minal of battery BAT’, through contacts 404 of
relay 3’, conductor 4I2, contacts 422 of relay 2%’,
conductor 423, wiper and third off-normal con
tact of bank IS’—6, winding of magnet M’-I,
interrupter contact IC’—-I to the neutral terminal
of battery BAT’. Magnet M’—-l then operates to
move the switch IS to its fourth position.
10
When the switch 2S reaches its ninth position,
the code-transmitting relay CTR. is operated to
transmit the fourth impulse which is a positive im
pulse to the code-receiving relay CRR’ so that it
closes its’ contacts'406. A circuit is then completed
from the positive terminal of battery‘ BAT’,
through winding of relay 3’, contacts 446 of relay
CR3’, wiper and fourth off-normal contact of
bank IS'—I, conductor 424, Winding of relay 2%’,
conductor 468, contacts 469 of relay St’ to the neg
20 ative terminal of battery BAT’. vBy closing its
contacts 425 relay 28’ completes a locking circuit
for itself to the negative terminal of battery BAT’.
As soon as switch 2S leaves its ninth position, the
fourth impulse is cut off and relay CRR.’ opens its
contacts 406 to interrupt the circuit of relay 3’.
A circuit is then ‘completed from the negative
terminal of battery BAT’ through contacts 444
of relay '3’, conductor 4I2, contacts 426 of relay
26’, conductor 421, wiper and fourth off-normal
442 and interrupts the circuit of relay 3’. A cir
cuit is then completed from the negative ter
minal of battery BAT’, through contacts 484 of
relay 3’, conductor 4E2, contacts 434 of relay 3!’,
conductor 435, wiper and sixth off-normal con
tact of bank IS’-—E, winding’of magnet M'-—l,
interrupter contact IC'-I to the neutral ter
minal of battery BAT’.
Magnet M’--i ' then
operates to effect the movement of switch IS’ to
10
its seventh position.
When switch 2S reaches its ?fteenth position,
the code-transmitting relay CTR is operated to
transmit the seventh impulse which is a positive
impulse to the code-receiving relay CRR’ so that
it closes its contacts 406. A circuit is thencom
pleted from the positive terminal of battery
BAT’ through winding of relay 3’, contacts 495 of
relay CRR', wiper and seventh off-normal ‘con
tact of bank IS’-—l, conductor 436, winding of
magnet 32’, conductor 488, contacts 4%» of relay 20
38’ to the negative terminal'of battery BAT’.
By closing its contacts 431, relay 32’ completes a
‘locking circuit for itself through the neutral
terminal of battery BAT’. By closing its con
tacts 45I, relay 32’ completes an obvious circuit
for the control relay 20’. When switch 2S leaves
its ?fteenth position, the seventh impulse is cut
off and relay CRR’ opens its contacts 404 to de
energize relay 3'. A circuit is then completed,
from the negative terminal of battery BAT’ 30
‘through
contacts 404, conductor 4I2, contacts
interrupter contact IC’—I to the neutral termi~
438 of relay 32’, conductor 439, wiper and seventh
nal of battery BAT’. MagnetvM’--l then op
erates to effect the movement of switch IS’ to its off-normal contact of bank IS'-6, winding of
magnet M’—-I, interrupter contact IC’—-l to the
?fth position.
neutral terminal of battery BAT’. MagnetM’—-I
When the switch 2S reaches its eleventh posi
35
tion the code-transmitting relay CTR transmits then operates to effect the movement of switch
ES’ to its eighth position.
the?fth impulse which is a negative impulse to
Should the remote station fail to receive one
the code-receiving relay ORR’ so that this relay
30 contact of bank IS’-—5, winding of magnet M'—l ,
closes its contacts 402.
A circuit is'then com
4.0 pleted from the positive terminal of battery
BAT’ through winding of relay 3’, contacts 4&2
of relay CRR’, wiper and ?fth oil-normal con
tact of bank IS’-—2, conductor 428, winding of
or more of the code impulses, the switch IS’ will
be in a position between its normal position and 40
position 8 after the last impulse is transmitted.
Whilevthe code impulses are being transmitted,
the interval between successive impulses is not
magnet 29’, conductor 4I9, contacts 420 of mag- ' sufficiently long to allow the relay 4’ to open its
45 net '36’ to the negative terminal-of battery BAT’.
By closing its contacts 429, relay 29’ completes
a locking circuit for itself to the neutral terminal
of battery BAT’. When the switch 2S leaves its
contacts 4B5 and close its contacts v4552. After‘
the last impulse, however, the interval is long
enough to ‘allow relay 4’ to open its contacts 465
and close its contacts 452.
Therefore, if the
eleventh position, the ?fth impulse is out off and switch is’ is in any‘ position between its normal 50
relay CRR,’ opens its contacts 402 so that the position and position 8, a circuit is completed for
.50 relay
the slow-to-drop-out relay 5’ from the negative
3’ is deenergized. A circuit is then com
pleted from the negative terminal of battery terminal of battery BAT’ through contacts 484
BAT’ through contacts 404 of relay 3’, conductor of relay 3', contacts 452 of relay 4’, wiper and
4I2, contacts 430 of relay 29’, conductor 43!, contact of bank >lS’--5, winding of relay 5’ to the
wiper
and ?fth off-normal contact of bank neutral terminal of battery BAT’. Byclosing its
55
IS’-—6, winding of magnet M’-—I, interrupter contacts 453, relay 5’ completes a notching cir
contact IC'—-‘l to the neutral terminal of battery cuit for the magnet M’-I through contacts 452
BAT’. Magnet M’—-I then operates to effect the of relay 4’ and contacts 404 of relay 3’ to move
the switch IS’ from whichever position it is in to
movement of switch IS’ to its sixth position.
position 9. Since the relay 5' is of the slow-to 60
When the switch 2S reaches its thirteenth po
drop-out type, this notching circuit is main
sition the code-transmitting relay CTR is oper
ated to transmit the sixth impulse, which is a tained by the relay 5’ to effect the movement of
negative impulse, to the code-receiving relay the switch IS’ through its position 8 although
ORR’ so that it closes its contacts 402. A cir J the circuit of relay 5’ is open in this position. 65
In positions 9 to 23 inclusive of switch IS’, a
65 cuit is then completed from the positive terminal
of battery BAT’ through the winding of relay notching circuit is completed through the wiper
3’, contacts 402 of relay CRR', wiper and sixth and contacts of switch IS’--5 and contacts 404
off-normal contact of bank IS5—-2, conductor ' and 452 to restore the switch IS’ to its normal
position. Therefore, it will be seen that if one
432, winding of relay 3|’, conductor 4I9, con
or more impulses of the code are not received or 70
tacts
420
of
relay
36’
to
the
negative
terminal
of
70
extra impulse is transmitted, the switch
battery BAT’. By closing its contacts 433, relay ifES’an
is immediately restored to its normal position
BI’ completes a locking circuit for itself to the
the code has been transmitted.
neutral terminal of battery BAT’. When switch ‘ after
If the impulses are transmitted correctly, the
28 leaves its thirteenth position, the sixth im
switch iS’ is in its eighth position when the ‘re 75
75 pulse'is cut off and relay CRR’ opens its contacts
2,107,902
lay 4' closes its contacts 452 after the trans
mission of the last impulse of the code. A cir
cuit is then completed from the positive ter
minal of battery BAT’ through wiper and eighth
oiT-normal contact of bank IS’--4, winding of
relay 6’, wiper and eighth o?-normal contact of
bank IS’—,5, contact 452 of relay 4’, contact 404
of relay 3’ to the negative terminal of battery
BAT’. By closing its contacts 454, relay 5’ com
<10 pletes a locking circuit for itself to the negative
terminal of battery BAT’. By closing its con
. tacts
440, relay 6’ completes_a circuit from the
7 positive terminal of battery BAT" through con
tacts 440, conductor 4“, contacts 3“ of relay
I 9', contacts 3|2 of relay 1’, winding of magnet
M'—2, interrupter contact IC’-—2 to the neutral
terminal of battery BAT’. A notching circuit is
thereby completed for the magnet M'—-2 so that
the switch 28' is operated until it reaches its
twenty-third position which is the position
starting impulse is transmitted to effect the
movement of the code selector 3S in the dis
patcher’s o?ice from its normal position before
the check code is transmitted thereto.
The position of the selected unit is indicated
by the potential applied to the twenty-?rst and
twenty-second oil-normal contacts of bank
4S'—-3 by-the wiper of bank 2S’—6. Since switch
28’ is in its twenty-third position and the appa
ratus AU’—23 is open and its auxiliary contacts 10
32] are closed, the positive terminal ofv battery
BAT’ is connected to both the twenty-?rst and
the twenty-second o?-normal contacts of bank
4S’—3. If the apparatus unit AU’—23 were
closed, its auxiliary contacts 32! would be open 15
and its auxiliary contacts 322 would be closed
so that the negative terminal of battery BAT’
would be connected to the twenty-?rst and
twenty-third o?-normal contacts of bank 4S’—3.
In position 23, the wiper of bank 2S’—6 also
‘connects the winding of a control selection relay
CSR’ between the neutral terminal and either
of battery BAT’ through contacts 442 of relay the
positive or' negative terminal of battery BAT’,
6’, conductor 443, winding of relay 34’, conductor depending upon the position of the apparatus
3|3, contacts 444 of relay 22', contacts 445 of unit AU'—23. Relay CSR’ which is a two-posi
relay 23', contacts 446 of relay 25’, contacts 441 tion polarized relay, is arranged to close its con
_ of relay
25’, contacts 448 of relay 29’, contacts
I
tacts 333 and 334 when the winding thereof is
449 of‘relay 3|", contacts 450 of relay 2!)’, con
connected to the positive ‘terminal of battery
ductor 454', wiper and twenty-third off-normal BAT’ and to close its contacts 335 and 336 when
contact of bank 2S’—2, winding of relay 1’ to the winding thereof is connected to the negative
the negative terminal of battery BAT’. Relays terminal. With the apparatus unit AU’-—23 in
,1’ and34’ are energized by the completion of ' the position shown, the relay CSR’ operates to
this circuit. By opening its contacts 3l2, relay close its contacts 333 and 334 when the switch
1’ interrupts the notching circuit of magnet 28’ stops in its position 23.
M'—2 so that the switch 2S’ stops in its twenty
When both of the switches 2S’ and 3S’ have
third position.
'
>
20
allotted to the apparatus unit AU'—23. A cir
cuit is then completed from the positive terminal
vSince corresponding contacts of banks 3S'—6
and 2S'_| are interconnected, the relay 8’ is de
energized to completethrough its contacts 3M
40 and the interrupter contacts IC’—3 a notching
circuit for the operating magnet M’—-3 of switch
‘3S’. Therefore, since the switch
_
28’ is operated
to the position allotted to the selected apparatus
unit, the switch 3S’ is also operatedto the cor
stopped in their twenty-third position and relay
25
30
35
8’ is energized, a circuit is completed from the
negative terminal of battery BAT’ through
contacts 3| 5 of relay 8’, contacts 3| 6 of relay
1’, conductor 3“, contacts 3l8 of relay 9’, con 40
ductor 3| 9, wiper and normal contact of bank
4S’--6, interrupter contact IC’—-4, winding of
relay III’ to the neutral terminal of battery BAT’.
By closing its contacts 320, relay II)’ which is
of the slow pick-up. type completes through the
responding position. -When both of- "these
switches 28' and 38’ have stopped in their wiper and normal contact of bank 4S’—5 a circuit
twenty-third positions which are the positions for the operating magnet M'—-4 of switch 4S’.
allotted to the apparatus AU'—-23, the relay 8' is By opening the interrupter contacts IC’—4, the
energized through‘ the wipers and twenty-third magnet M’—4 interrupts the circuit of relay l0’
o?-normal contacts of the banks 2S’—I and ,which in turn e?ects the deenergization of the
3S’—6.
‘
magnet M'--4 so that the switch 48’ is moved 50
With the switch 38' stopped in its twenty-third to
its ?rst position. In‘ positions 1-6 inclusive
_ position, the code of the selected apparatus unit
which is positive, positive, negative, positive, neg
ative, negative, positive is now set up on the con
tacts of banks 4S’-—3 of code sender switch 48’.
Since the ?rst two impulses are always positive,
‘ ‘the seventh , and
ninth off-normal contacts of
"60
bank 4S’-3 are permanently connected to the
positive terminal of battery BAT’. The eleventh,
?fteenth, and seventeenth oif-normal contacts
of bank 4S’—3 are respectively connected by
the wipers and twenty-third off-normal contacts
,of banks 3S’--|, 3S’—3, and 3S'—-4 to the nega
tive‘ terminal of battery BAT’ and the thirteenth
and vnineteenth off-normal contacts‘ of bank
-4S'—3 are ‘respectively connected by the wipers
"and twenty-third oii-normal‘contacts of banks
‘ 3S'—'2 and 3S’—5 to the positive terminal of the
battery BAT’.
~
1;; In order that the code~receiving selector 3S in
the dispatcher’s office may be rendered operative
'toreceive the check code, the ?fth oif-normal
175 ,
of switch 48' the ?rst to sixth off-normal con
tacts of bank 4S'—6 are connected to the posi
tive terminal of battery BAT’ through conduc 55
tor 323, contacts 324 of relay 34’, conductor 325,
wiper and eighth oif-normal contact of bank
lS’-3 to the positive terminal of battery BAT’
and. in positions 7-21 inclusive the seventh to
the twenty-?rst contacts of bank 4S’—-6 are con 60
nected directly to the positiveterminal of bat
tery BAT’. Therefore, as soon as the switch 35’
sets up the check code, the code sender 4S’ moves
from its normal position to its twenty-second
position.
I
65
Since only two line conductors are used, it is
necessary that they be transferred from the
code-receiving equipment to the code sending
equipment in the remote station before the check
code is transmitted to the dispatcher’s of?ce. 70
Thisresult is accomplished by relay 35' which is
energized through the wiper and contacts of bank
4S’—-2 in positions 4-21 -inclusive of switch 48'.
contact of bank 4S’—3 is connected to the nega
By opening its contacts 304 and 305, relay 35’
tive terminal of battery. BAT’. Therefore, a disconnects
the code-receiving relay CRR’ from
2,107,902
8
relay CRR closes its contacts H14 and completes
the line. conductors L-l and L-2, and by clos
ingits contacts 326 and 32‘! transfers the line
conductors to the contacts of the code-transmit
ting relay CTR’ which is a three-position polar
Fit ized relay and which is energized each time the
wiper of bank QS’—'3 engages a'contact connected
either to the positive or negative terminal of
a circuit from the positive terminal of battery
BAT through the winding of relay 1, conductor
20%}, contacts I04 of relay ORR, conductor E65,
wiper and ?rst off-normal contact of bank'3S—-l,
conductor 209, winding of relay I3, conductor
2&0, contacts 2“ of relay 9, to the negative ter
rm'nal of battery BAT; By closing itscontacts
' battery BAT’. By closing its contacts 33?,re
lay 35’ completes a circuit from the positive 212', relay l3 completes. a locking circuit for itself
to the neutral terminal of battery BAT.‘ As soon"
10 terminal of battery BAT’, contacts 333 of relay
CSR’, conductor 338, winding-of relay !1’, con-. as the switch 4S’ leaves its position L'the ?rst
impulse of the check code is cut oif and relay
tacts 339 of relay ‘l3’, conductor 345, contacts’ ORR
e?ects the deenergization ofvrela'y' ‘l. A
331 of'relay 35’, to the neutral terminal of bat
circuit
is then completed from the negative ter
tery BAT’. By closing its contacts 34!, relay l1’ minal of
battery BAT through contacts 265 of
completes a locking circuit for itself to the neu
relay
1,
conductor
206, contacts2|3 of relay i3,
tral terminal of battery BAT’.
conductor
2M,
wiper'and
?rst off-normal con
When the wiper of bank éS’-3 engages a con
of bank 36-4, winding of magnet M-S,
tact which‘is connected to the negative terminal tact
of battery BAT’, the code-transmitting relay interrupter contact 10-3 to the neutral terminal 20
and 329 so that the ' of battery BAT. Magnet M-‘—3 ithen operates to’
CTR’ closes its contacts 328
line conductors L-—l and L-—2 are respectively
connected to the negative and positive terminals
of battery BAT’ and a negative impulse is trans
mitted over the line conductors. When the wiper
of bank 4S’—-3 engages a contact which is con
nected to the positive terminal of battery BAT’,
the relay CTR’ closes its contacts 339 and 33!
so that the. line conductors L—! and L-—2 are
respectively connected to the positive and negae
30 tive terminals of the battery BAT’ and a positive
impulse is transmitted over the line conductor.
In the displatcher’s office the impulses trans
mitted over the line conductors 'L-l and L--2
by the operation of the code-transmitting relay
CTR’ energizes the code-receiving relay 'CRR,
effect the movement of switchcts to its second
position.
.
V.
'
When switch 4S’ reaches its ninth position and 7
relay CTR’ is operated to transmit the second
impulse of the check code, which is a positive v25
impulse, relay CRR again closes its contacts let
and completes a circuit from the positive ter
minal of battery BAT through winding of relay
1, conductor 200, contacts 104 of relayrCRR, con- }
ductor Hi5, wiper and second oiT-normal contact 30
of bank 3S——l, conductor 2l5, winding of relay
[5, conductor 2l0, contacts 2“ of relay 9jto the
negative terminal of battery'BAT. By closing
its. contacts 21%, relay l5 completes a locking cir
cuit for itself to the'neutral terminal of battery
BAT. As soon as switch 48’ leaves its position
which is. connected across the line conductors
9,, the second ‘impulse of check code is cut off and
L-i and L-2 by contacts fill of relay we, con
ductor I02, contacts I03 of relay 28, and wiper . relay ORR effects thedeenergization of relay ‘i.
circuit is then completed from the'negative
and eighteenth off-normal contact of bank, A
terminal of battery BAT through contacts295 of 40
28-3.
When
the
code-transmitting
relay
CTR’
40
relay '1, conductor 206, contacts 2!‘! of relayzlii,
is operated so that a negative impulse is trans
conductor 2E3, wiperand second‘ o?'-normal con
mitted over the line conductors, the code-receiv
of bank 3S—-ii, winding of magnet M—3,
ing relay CRR closes its contacts I30 and when tact
interrupter
contact IC—-3 to the neutral terminal
a positive impulse. is transmitted over the line.
of battery BAT. Magnet M—3 then effects the 45
conductors, the relay CRR closes its contacts I04.
movement of switch 38 to'its third position.
When switch 48’ reaches position H,'relay
CTR’
is operated to transmit the third impulse
code-transmitting relay CTR’ is operated to
of the check code, which is a negative impulse.
transmit the starting impulse which is a nega
tive impulse, the code-receiving relay ORR is op- ' Relay CRR then closes its contacts I30 and a 50
. circuit is completedfrom the positive terminal
erated to close its contacts I36 and thereby coin of battery BAT, through winding'of relay '5, con- plete a circuit from the positive terminal of bat
tery BAT through winding of relay 1, conductor ductor 260, contacts 130 of relay CRR, conductor
Therefore, when the code sender As’ in the re
mote station reaches its ?fth position and the
20!], contacts I36 of relay GER-conductor I3l,
wiper and normal contact of bank 3S-—2, winding
of relay i0, contacts 263 of relay 9 to the nega
tive terminal’ of battery BAT._ By closing its
contacts 294, relay it completes a locking circuit
to the neutral terminal of battery BAT. As soon
60 as switch its’ leaves its ?fth position, the starting
impulse is cut off from the line conductors and
V relay CRR effects the deenergization of relay 1.
By closing its contacts 205, relay 1 completes a
circuit from the negative terminal of battery
~ BAT through contacts 205 of relay 1, conductor
205, contacts 281 of relay l0, conductor 208, wip
ers and normal contact of bank 3S-—4, winding
of operating magnet M—3 of switch 33, inter
rupter contact IC-—3 to the neutral terminal of
battery BAT. Magnet M-—3 then operates to
effect the movement of switch 3S to its ?rst po
sition.
I31, wiper and third off-normal contact of bank
33-2, conductor 21.9, winding of relay l8, con 55
ductor 220, contacts 293 of relay 9 to the negative
terminal of battery BAT. By closing its con
tacts 22l, relay l8 completes a locking circuit for ‘
itself to the neutral terminal of battery BAT. As
soon as switch 48’ leaves its eleventh position,
the third impulse of the check code is cut off ‘and
relay CRR 'eifects' the deenergiz'ation of relay 1.
A circuit is then completed from, the negative
terminal of battery BAT through contacts 2595 of
relay ‘i, conductor 286, contacts 222 of relay l8, 65
conductor 223, wiper and third off-normal con-''
tact of bank SSA-4, winding of vmagnet M—3, in
terrupter contact ’IC—-3 to the neutral terminal
of battery BAT. Magnet M—3 then effects the
movement of switch 38 to its fourth position. 70
' When switch 43’ reaches its thirteenthposition
andrelay CTR’. transmits the fourth impulse of
~
the check. code, ‘which is .a positive impulse, relay
, When switch 4S’ reaches its seventh position
and the code-transmitting relay CTR’ is operated ' ORR closes its contacts ‘H14 and completes a cir
to transmit the ?rst impulse of the check code,
60 f
cuit from the positive terminal of. battery BAT
2,107,902
9
thliQllgh winding of relay ‘I, conductor 200, con~
tacts] 0,4 of relay CRR, conductor I05, wiper and ' ductor 200, contacts I04 of relay CRR, conductor
I05, wiper and seventh cit-normal contact of
I Y iourthoif-normal contact of bank ,3S-I, con
ductor‘ 224, winding of ‘relay I9, conductor 2I0, bank 3S—I_, conductor 236, winding of relay
contacts 2;“ of relay »9 to the negative terminal 2,5, conductor 2I0, contacts 2“ of relay 9 to
ofibattery BAT. ‘By closing its contacts 225, the the negative terminal of battery BAT. By clos
relay _I_~_9:ccmpletes al-locking circuitwforl itself to ing its contacts 231, relay 25 completes a locking
- the. neutral terminal of battery BAT. I Assoon as circuit for‘itself to the neutral terminal of bat
BAT. By closing its contacts 238 relay
switch =,4_S’-leaves its thirteenth position, the tery
25 completes an energizing circuit for the wind
w iourtheimpulseofvthe check vcode is cut off and ing
of relay I4. As soon as switch 48’ leaves
relay-0BR effects the deenergization of relay ‘I.
V A-Icircuit , is, then
completed from the negative
,erminal of battery BAT through contacts 205
,
» oi relay ‘I, conductor 206, contacts 226 of relay I9,
conductoryZZ‘l, wiper and fourth off-normal con
tactof :bank 35-4,, windingv of magnet M--3,
,
~ interrupter contact IC,—3 to the neutral terminal
of battery-‘BAT. - "Magnet M.—3 then effects the
its nineteenth position, the last impulse of the 10
check code is cut o? and relay CRR effects the
deenergization of relay 7. A circuit is then com
pleted from the negative terminal of battery
BAT through contacts 205 of relay 1, conductor
206,_contacts 239 of relay 25, conductor 240,
wiper and seventh cit-normal contact of bank
BSFG winding of magnet M—3, interrupter con
tact
to the neutral terminal of battery
qgWhenswitch 4S’ reachesits ?fteenth position BAT. IC-3
Magnet M-3 then effects the movement
' andrelayCIR' transmits. the ?fthjimpulse of ‘of
switch 38 to’ its eighth position.
which is a negative impulse,
‘When
switch 48’ reaches position 2! and the
,relaygCRR yclosesjvitsqccntacts I30 and completes code transmitting
relay CTR’ operates to trans
. a [circuit from t (e . positive terminal of, battery
a positive impulsecorresponding to the open
B
through ,winding of relay '1, conductor 200, -mit
oflthe' apparatus unit AU'—-23, relay
eontacts-JM ofgrelay CRR, conductor -I3I, wiper; position
CRR closesflits contacts I04 and ‘completes a
I ‘ 1' andq?jthvoif-normal contact oibank 3S—jZ,,con
circuit from ‘ the positive terminal of battery
movementtoi switch 38 to its?fthposition.
Winding of relay‘22, vconductor 722,0, BAT through winding of relay 1, conductor 200,
ZNa-pf relay-9,- to the negative, terminal 17 contacts
I04 of relay‘ ORR, conductor I05, wiper
tery-g-BA'I‘. , ~ By closing its ' contacts 229,
O
,i~‘¢1ay.;z_z>, completes a‘ locking circuit foritself to
eutral ‘terminal of battery BAT. As soon as
'7 lyirnpulseiof the check 3code iscut offvand relay
cRRlr-e?ects the deenergization of relay 1. A
ci
hit’ is thencompletedfrom the negative ter
of battery-BAT through contacts 205 of
‘.
conductor 205, contacts ,230 ~~ of relay
,
conductor 23!, . ;‘per_ and'iifth ‘off-normal
,, 4o
and eighth off-normal, contact’ of bank 3S-—I,
windingof relay II to the negative terminal of
battery BAT. By closing its contacts 242, relay
I! completesa circuit between the positive and
neutral terminalsof. battery BAT for‘ the master
indication relay MIR so that "it closes its con
tacts 243. The master indication relay is a two
position polarized‘rela'y and is so designed that
it remains in the position to which it is last
Contact-0f bank?srl'trwinding of magnetMel moved‘ whenever the winding thereof is deener
gized.
interrupter contact: 10-3 to the neutral ter
1ininalluofibatteryYBATU Magnet M-3 then ef
‘ feetsthe ,movementofr the switch. 38 to its sixth
1" position.
'
.
'
-
‘
'
'
and 22 of bank 4S’-—.3 are connected together,
and relayCTR' is made slightly slow-to-release
When ,sWitchAS' reacheslits seventeenth po
by having the resistor R connected in shunt to
its winding, relay CTR’ maintains its armature
impulse _of:the;check code,which is a negative
moving from itstwenty-?rst position to its twenty-second position. When the switch 4S’ reaches
its twenty-second position an energizing circuit
Kionandethe relay CTR’ transmits the sixth
impulserelay CRRcloses its>contactsll30 and
completes‘ a; circuit ,from' the positive terminal
*otbattery BA'Iithroughv winding of relay 1, con
'ductor;
200,7 contacts
’ t
I30 of ‘relay ORR, con,
duster I3I, wiper and sixth oiT-normal contact
,ofubank 3S—,2, conductor 232, winding of relay
.2
>
_
Since the adjacent Off-normal contacts 2! 40
conductor .220, contacts 203 of relay 9 to
negativeterminal .of. battery BAT. By clos
in its operated position while the switch 48’ is 45
.
for relay I2’ is completed by the wiper and ,.
twenty-second , off-normal
contact
of
bank
4S'—4.' After the switch 48' has remained in
its position 22 for a certain length of time, relay
35’ whose circuit is interrupted by the wiper of
bank vIlS'-2 leaving its twenty-?rst off-normal
.jinghitscontacts
233, relay 24 completes a lock
'
', ing circuit for itself to the neutral terminal of contact ‘opens its contacts 325 and 32? and 55
I ‘ battery (BAT. As soon as switch 48' leaves its ,thereby‘cuts off the indication impulse. Relay
theniopens its contacts we and e?ects the
teenth position, the sixth impulse of the , CRR
deenergization of relay ‘I. A circuit is then com—
no .
codeiis cut off andrelay CRR effects the
from the negative terminal of battery
fd'eenergization of relay 7., Acircuit is then com~ pleted,
60
.pleted'from; the negative terminal of battery BAT BAT through contacts 205 of relay 1, conductor
2%, contacts 260 of relay Ii, conductor 26I,
through contacts 205 of relay 1, conductor.205, wiper
‘and eighth off-normal contact of bank
contacts 234 of, relay 24, conductor 235, wiper 3S;,4;winding_
of magnet M-—3, interrupter con
,and'sixth off-normal contact of bank 3S—4, tact IC-—3 to the'neutral terminal of battery
winding of magnet M_3, interrupter contact
Magnet M-3 then operates to effect the 65
.3073 to the neutral terminal of battery BAT. BAT.
movement of switch 38 to its ninth position.
Magnet
then effects the movement of
A predetermined time after the indication im
switch .58 to. itsfseventh position,
pulse iscut ‘off by the deenergization of relay
,,When switch ‘48’ reaches its nineteenth po
35', relay '8, which is of the s1ow-t0-drop-out
, ,sitionand relay CTR’ transmits the last im
type, closesits contacts 243a. This relay 8, the 70
,pulseof the check code, whichis a positive im
'
circuit of which is opened at contacts 202 of
pulse, relay ,CRR closes its contacts < I04 and
" ~oompletes acircuit from the positive terminal
rofbatteryBAT through, winding of relay 1, con
4
relay?l, is'so designed that the time interval be
tween the diiferent impulses transmitted by the
code sender 48? is not sufficiently long to allow
75
‘10
5,107,952
the relay'to close its contacts 243-3. _After the
indicationv impulse is transmitted, however, the
time interval is su?icient to allow this relay to
operate. When the contacts 243a close a circuit
is completed from the negative terminal of bat
tery BAT, through contacts 235 of relay 1, con
ductor 236, contacts 243a of relay 8, wiper and
ninth off-normal contact of bank 33-3, wind
ing of relay 21 to the neutral terminal of battery
10 BAT. By closing its contacts 244, relay 21 com
pletes a locking circuit for itself to the negative
terminal of the battery which is independent of
the contacts of the relays 1 and 8. By closing
its contacts 245, relay 21 completes a circuit
15 from the positive terminal of battery BAT
through contacts 243 of relay WE, contacts 245
of relay 21, conductor 245, contacts 241 of relay
I3, contacts 248 of relay I5, conductor 249, con
tacts 253 of relay l3, conductor 25I, contacts
252 of relay I9, conductor 253, contacts 254 of
relay 22, conductor 255, contacts 256 of relay
24, conductor 251, contacts 258 of relay I4, con
ductor 253, winding of indication relay IRE-23
to the neutral terminal of battery BAT. A cir
cuit is also. completed from conductor 259
of the time delay pick-up type and is provided
in the circuit ‘so as to prevent any transient
disturbance on the line from e?ecting the oper
ation of a selected apparatus unit.
By closing its contacts 341, the relay I4’ con
nects the winding of the code receiving relay
CRR’ across the line conductors L-I and L——2.
This circuit of the relay CRR’ is from line con
ductor L—-I through contacts 304 of relay 35",
conductor 4M, winding of relay CRR’, conductor 10
333, contacts 341 of relay I4’, contacts 346 of
relay I1’, conductor 309, contacts 3I0 of relay
i’, contacts 365 of relay 35’ to line conductor
L—-2. The direction of current flow through
the winding of relay ORR’ causes this relay to
close the contacts 403 and'complete a, circuit
from the positive terminal of battery BAT’v
through‘ the winding of relay 3', contacts 406 of_
relay CRR’, wiper and eighth off-normal con'-"
tact of bank IS’, conductor 456, contacts 352 20
of relay 34’, conductor 353, contacts 334 of relay
CSR’, contacts 254 of relay I6’, winding of relay
I5’, conductor 355, contacts 356 of relay I2’ to
the negative terminal of battery BAT’. By 0105-‘
ing its contacts 351, relay I5’ completes a look
ing circuit for itself which is independent of the
contacts 334 of relay CSR’. By closing its con
third off-normal contact of bank ES—,—|, conduc- I tacts 358, relay I5’ completes a circuit from, the
tor I34, wiper and eighteenth off-normal cone negative terminal of battery BAT’ through conl
tact of bank 2S—~5, winding of relay I4a to the tacts 353 of relay l5’, conductor 359, contacts
neutral terminal of battery BAT. The direction
358 of relay l4’, conductor 36 I , wiperand twenty
of current flow in the winding of relay IR——‘23 is third off-normal contact of bank 2S’--5, wind
' such as to cause the relay to close its contacts
ing of control relay CR’-—23 to the neutral ter
555 and open its contacts I56 so that the green
minal of battery BAT’. The current in this cir
light G—-23 is lighted and the red light R-—23
cuit causes relay CR'-—23 to close its contacts
is extinguished. The lighting of the amber lamp
352 and thereby complete through the auxiliary
AIM-23 indicates to the dispatcher that the se
contacts 363 an energizing circuit for the clos
lection has been properly made and that the ing coil CC’-—23 of apparatus unit AU’-~23.
selection check relay I4a is energized so that it is
When both of the relays I4’ and CRR’ are
now possible for him to operate the selected ap
connected in parallel with the high resistance
paratus unit. It will be observed that the amber
relay l3’ in the remote station, the current
lamp ANT-23 corresponding to the operated se
through the relay 32 in the dispatcher’s o?lce is
' lect key SK—23 can be lighted only when the
su?icient to cause this relay to pick up. By
circuit established through the selection relays closing its contacts I46, the relay 32 completes a
ill-25 inclusive agrees with the contact on which
circuit for the operate lamp 0L so that this lamp 45
the wipers of the ‘code ?nding selector is at the
is lighted as long as the control impulse is being
dispatcher’s office have stopped. .
transmitted to the control relay of the selected
After the amber light AWL-23 is lighted, the
apparatus unit. By closing its contacts I51 and
dispatcher moves the check key CK—-23 to its
£53, the relay 32 completes shunt circuits around
opposite position thereby completing a circuit for the contacts I42 and I43 of relay 33 so that the 50
the ‘white light W-—23. Then he operates the subsequent energization of relay 33 does not cut
operate, key OK so as to close its contacts I35
oii the control impulse. By closing its contacts
and 533. The closing of the contacts I35 com
531, relay 32 completes a circuit from the posi
pletes a circuit from the negative terminal of
tive terminal of battery BAT through contacts
battery BAT through the Wiper and eighteenth
535 of key OK, conductor M8, winding of relay
33, conductor I39, contacts I41 to the neutral
55 off~normal contact of bank 2S—4, conductor I39,
contacts I38 of relay Ilia, winding of relay I6“, terminal of battery BAT. By closing its con
conductor I31, contacts 135 of key 0K to the
tacts I53, relay 33 completes a locking circuit
neutral terminal of battery BAT. Relay Iiia for itself around the contacts I41 of relay 32.
contacts
I40
and
I45
completes
a
by closing its
Therefore, the relay 33 remains energized as long 60
as the operate key is maintained in its .“operate"
60 circuit from the negative terminal of battery
BAT through winding of relay 32, contacts I46
position so that when the relay 32 subsequently
of relay I51‘, conductor I4I, contacts H42 oi relay
drops out, another control impulse cannot be
33, line conductor L-—2, contacts 365 of relay
transmitted until after the key OK has ?rst
35’, contacts sic of relay I’, conductor 339,. wind
been returned to its normal position to effect 65
F ing of high resistance relay I3’, contacts 344 of
the deenergization of relay 33.
relay I2’, conductor 40!, contacts 304 of relay
When the apparatus unit AU’—-23 closes, it
35', line conductor I.r—-l, contacts E43 of relay effects the opening of its auxiliary contacts 32I
33, conductor I44, contacts‘ M5 of relay l62i to and the closing of its auxiliary contacts 322 so
the positive terminal of battery BAT. Since the that the current through the windings of relays 70
winding of relay I3’ has a high resistance, the
CSR,’ and CTR,’ reverses. This reversal of cur
current in this circuit is not sui?cient to cause
rent causes the relay CSR’ to open its contacts
relay 32 to pick up. Relay I3’, however,‘ closes 333 and 334 and close its contacts 335 and 336 and
its contacts 345 and connects the winding of
the relay CTR,’ to open its contacts 330 and 33|
relay I4’ and contacts 346 in a series circuit
and close its contacts 328 and 329. ‘The opening 75
around the winding of relay I3’. Relay I4’ is
through amber lamp AM—-23, wiper and twenty
I
15v 1
V of ‘the contacts 333 of relay CSR' interrupts the V relay I5’; In-this case relay I 6’ by closing its
circuit'of relay l1’ so that it opens its contacts contacts ‘3H applies positive potential to the con
'3“ and 346. . By opening its contactsY346, relay trol relay URI-23 so that it closes its contacts
H " effects the disconnection of the relays l4" and 312 and completes through the auxiliary contacts
,
‘ 5 CRR‘ 'from'across the line conductorsso that the
313 an energizing circuitfor the trip coil TC’—23
of the apparatus unit AU'—-23.r The opening of
fvalue of the relay 32 m the"dispatchefs-o?ice; the apparatus unit AU’--23 reverses the current
' , Relay 32 then drops out andby‘opening-‘Racon
.7 through the code transmitting'relay CTR.’ so that
tacts" I51 and I58 cuts'o?'the'"controlti-mpulse ‘ the indication impulse is a positive impulse. In
l ' ‘1'10" and by closing- its contacts 15sv transfers theiline ‘thev dispatcher’s' oilic'e this indication impulse is
‘
conductors L-—| and-'L-LZ t'o the/receiving circuit ‘ received-as before‘exc'ept that relay H is ener-t 10
“the di'spat'cher’s o?ice£~~ ' _ -_
>
h
7-».
gized by the‘positlve'impulse to effect the oper
The operation or the apparatus'unit'tAU’QN ationof theiindicating relay IR‘—23 so as to ex
" ‘ _7 control» current‘is decreased below‘ the drop ‘out
l'so-v interrupts ‘the locking‘icircuit of,» indicating
tinguish there'd'lampr R-23 and to light the
' "élay - IA'_—.i-23;=~but ‘as soon- as" the apparatus unit
,
green lamp G—23.
r
t_
,
I
4
5 it's vn'eivvfpositionran energizing-circuit for" #1 The apparatus unit A'U’-‘23 maybe operated
I qthe ‘elayiIA’;23{is‘-completed throughthe' wiper '
asfgman'yi times as desired before ‘the selection is
entylithi'rd Contact ‘orbank. 1zs'1_=_3 2,; conduc'i
releasedii?To prevent the ‘selected’ apparatus unit
from®pumpingi~iiwhile ' the operate key OK is
When the ‘control impulse is '“c'ut‘ off, relay l3‘; 4
relay l5’ or I6’ when energized, 20
I at the remotestationydropslout anul'ccmpletesia pressed‘,lthe~
completes‘a locking ~circuit for itself aroundv the .;
'
a circuit ‘from thelenegative terminaliv
f ybattery, .
contacts of the-relay CSR’ and opens the circuit
‘ ' BAT’, through the winding Ker-relay’ atieqnductor‘
oft-he i other :TfelayJ Thus the‘?rst of those two
7 ‘ontac'ts 3583501’ relay l1’,jcondu‘ctor‘36'ljc‘on
‘to be-energlzed remains'energized until the
tactsf'a??' of rela‘y'il3‘; _conductor*365,;wiper and ' relays
controlimpulse is released.‘v
I
Y
4,
“l ;
i'twentyésecond"off-normal'contact of banklls'é2
the neutral terminal of battery *BAT'.*'*~ clay
a
yjclosing its'iconta'cts'
negative; firnpulse {over the line {conductors ‘
‘. 11d
‘ 7After- the last operation has‘ been performed by
the "dispatcher he‘ can‘ release the selectioneby
326511513311;transmits“ 1 movin'g‘the‘t-select key SK4—23, toits normal posi
I‘ tion; J-The closing cfthecontacts 1990f the select ‘
keyf;SK-—"23 connects the twenty-thirdv off-normal 30
- '2’isince rtheic'q'ntacts 3281a meantime" =
sm
contact ‘of the bank IS‘—6 to the positive terminal
“ of sba'ttery'BAT‘ so that a notching circuit is com
- ‘_ negative ‘terminal Loff ba tery,
pleted for the magnet» M-l to move the switch
PglSito positionita?A- notching circuit is then com
:
‘ducto'rj3'38; winding‘ of‘relayi‘i'; contacts v335i “of, _>jpleted"direct_ly to the positive terminal or the bat;
v; I, relay ‘I3f;rconductortdotcontacts 331 orr'eiay 35". tery.=,BAT:*to restore the switch iS’to its normal
‘
tof'the, neutral terminal_Jof,batteryLBATf," v Relay
‘~
_’
‘
_
a
' l 1’ "by closing, its contacts ‘34 i jc'ompl'ems "a ‘locking’
position:
.
35
a
Wheni‘vswlt'ch IS moves" from its position 23,
' I‘ relay 4‘. drops "out and by closing its contacts H5
mots/‘3310f relay '35"? ’ ‘By opening‘ ‘its contacts
I 368,yrel_ay ‘If! ’ vinterrupts the ‘above-‘traced “circuit
completes anotchingcircuitfor the magnet M-2
through ‘the ~‘vviperI-and eighteenth oif-normal
7‘ ‘ rgthe‘relay 35' so 'thatfthe indicationfimpulse is
contact: of bank 2S,—.6; Magnet M-2 then ef
i cutfo?’ and thelin‘ejconductors11;! and L—"2:are ‘fects the movement of the switch 28 to position
connected to the controlimpulse ‘receiving v apg " -l9.< Since,v the nineteenth to the twenty-fourth
Y- 1
pa atuisyat' the remete:,_st_a ‘on; "Since-the, relay " or! normal. contacts of bank 2S—6 are connected
I] is'ofithe slow-"to-pic "up‘type, theinidication directly to the negative terminal‘ of the battery
is’ transmittedffover
I for a: predetermined time." '
the line" "
_
‘
nductors
Atthe dispatchers Io?icefi ' "
pulse causes the ,code?reeeiyin jTelaYj'CRR
:indication‘ t0 I‘-‘
vBAT, ‘a notching circuit is then completed for the
magnet M72 to restore the switch 28 to its nor
mal"position..y~
"
:soon' "as ‘ switch ' IS leaves
"
'
ng twenty-third (
felo‘se its contacts I30 so: that'a‘ circuit is completed position,‘ the heretofore traced circuit for the
iii-om] ‘the positive terminal of battery “BAT relay 14a is. opened by'the Wiper of bank IS—I
f through‘ the "winding of relayj‘i; conductor'r??, ‘leaving- its twenty~third off-normal contact. By
I ' contactsviii?'of relay QRRQcOnductor 13,]; wiper
and ‘nintho?-normal' ‘contact of'gb'ank ‘ES-+2, can:
closingv its‘ contacts I60. relay l4a completes a
circuit 1mm the "negative terminal of battery 255
BAT-through contacts v2'll of relay 21,‘ conduc
'uctor -_265,‘jconta'cts 2556'oi relay 21,:‘con'ductor
Bl; winding vof‘ relay iZNt‘o the negatlveiterniinalg -§tor521‘|2;:contacts1600f relay l4“, conductor I6I,
; battery . ‘BAT, vgBy ‘closing: vits‘ i.jc<>r'itacts?_ 268,, 7'
‘
_
ay; l2f‘reve'rses thejcurrent'through'the wind:
‘£60 I‘ I of'relay MIR so that it'opensfit’s: contacts ‘243
winding of relay 28 to the neutral terminal of
the battery BAT. By’closing'its contacts I64,
relay 28 completes a-circuit from the positive
V- . nd f'clos’e'si its contacts 255i 5 Thisjresults 'ini'a _ ‘terminal
*of battery BAT through winding of
reversalv of current throughfgthe'indicating‘ ‘relay
L
‘
‘"1
"solthat it opens vit'sicontactsvilii and closes’
tacts i 56" thereby‘extinguishing the Y green
+23 ‘and ‘the white light w-qs vandi‘light‘g
The apparatusunit- Alf-423,fmayv be" opened‘
,
fgain‘, ‘
relay:1‘;_conductor200, contacts I64 of relay 28,
1conductor"1'l§5, winding: of relay 9 to the negative
‘terminalfof battery BAT. By opening itscon
jt'acts‘2 03 and 2| If, relay 9 opens all of the locking
"circuits of’ the energized selection relays in the
‘dispatcher’s o?ice. ‘By ‘closing its contacts I 62,
" ‘desired; ‘by ‘movie-g‘ the control‘ key
completes a“'c1rcuit from the negative
toth'e'opposite position and again moving , (relay-:28
operareikey "to itsf‘cperyate’i position." The ~ terminal o'Mf-ba‘ttery BAT through
' generation of’ the apparatus in" ‘the remote _ station ‘relay“28_,jconductor 213;‘ wiper and ninth voil’
as for the closing"operatioa‘eircept v '"normal.v contact ofj‘bank 35-4,, winding of mag
'g "the V~‘same
’
_
I
v
‘
contacts
I62
of
net
interrupter'contact IC_—3 to the neu
fithat'ith‘e controlselect'ionj relay CSRy'jnow has its =tral¥termina1i~ovfjbattery'BAT,
The‘ magnet M‘—3
.jtoritacts, 335 close?! to ‘Fiat f?ié», cqhtrbl ‘impulse
the’1m0verne'nt of "switch 35 to its
‘the relay " [6'- to "be energized ‘instead "of "the fthenyeffects
'tenthfpos'ition'.‘ ‘When-‘the switch 33 leaves posi 75
2,107,902
12
tion 9 the heretofore traced locking circuit of
relay 2‘! is interrupted so that it drops out and
effects the deenergization of the relay 28 which,
in turn, by. opening its contacts I64 eifects the
deenergization of the relay ‘I. After the'relay ‘I
has remained'deenergized for a sufficient length
of time to allow relay 8 to close its contacts 243*‘,
a. notching circuit is completed from the negative
terminal of battery BAT through contacts 205
10 of relay ‘I’, contacts 243a of relay 8, wiper and
o?-normal contacts III-24 inclusive of bank
3S——3, winding of magnet M-—3, interrupter con
tact IC-—3 to the neutral terminal of battery
BAT. Magnet M-—3 then notches the switch 38
15
to its normal position.‘
_
-
nected in the notching circuit of magnet M’-4
to provide slower stepping of the switch 48’ from
the position 22 to its normalposition. When the
selector switches IS’ and 4S’ reach their normal
positions, the heretofore traced check circuit is
completed to effect the energization of the relay
I which by closing its contacts I03 completes a
circuit for the start lamp S'I‘L.
When the supervisory equipment is at rest and
an apparatus unit changes its position, ‘an indi
cation is immediately transmitted to the dis
patcher’s office. yAs an example, it will be as
sumed that the apparatus unit AU’--23 is closed
.
While the relay 28 is energized,.thev contacts
I66 thereof complete a circuit for the code trans
mitting relay CTR so that a negative impulse is
transmitted over the line-conductors L-—I and
20 L—2. In the remote station this negative im
., pulse causes the code receiving‘ relay, CRR’to
~ close its contacts 492 and complete a circuit from
10
and opened automatically. While the apparatus '
unit AU’—23 is closed the indication auxiliary 15
relay IA’v—-23 is maintained energized by a lock
ing circuit which is completed from the negae
tive terminal of battery BAT’ through auxiliary
contacts 322 on apparatus unit AU’V-23,‘wind
ing of relay IA’—23, contacts 380 of relay 20
'IA'--23 to the neutral terminal of battery BAT’.
When the apparatus unit AU’-23 opens, the I
the positive terminal of battery BAT’ through locking circuit of.relay.IA’-23 vis opened so that
the winding of relay 3’, contacts 402 of relay, relay IA’—23 drops out and closes its contacts 25
38I. A notching circuit is then completed for
25 CRR’, wiper and eighth off-normal contact of themagnet M'—2 to move the'switch 28’ from
bank IS’—2, conductor‘465, winding of relay 36’ whatever position itmay bein to position 23
to the negative terminal of battery BAT’. By which is the position allotted to the apparatus
opening its contacts 409 and 420, relay 36'.-in-l unit AU’-23. This notching circuit is from the
terrupts' the locking circuits of the energized positive terminal of battery BAT’, through wiper 30
30 selection relays in the. remote station so that they and normal contact of bank IS’-3, conductor
are restored to their normal positions. By clos
ing its contacts 466, relay 36.’ vcompletesa circuit
from the negative terminal of battery BAT’
through contacts 466 of relay v36', conductor v461,
35 wiper and eighth off-normal contact of bank
323, contacts 38! of relay IA’-—23, conductor 4“,
contacts >3II of relayISQContacts 3“! of relay ‘I’,
winding of magnet M’-.-2, interrupter contact
IC’--'-2v to the neutral'terminal of battery BAT’. 35
When switch 28’ reaches position 23, relay ‘I’ is
IS’-6, winding of magnet M’—'-I, interrupter
energized to open its contacts 3I2 and interrupt
contact IC’——I, to the neutral terminalkof bat
tery BAT’. Magnet M’-—I then effects the move
ment of switch IS’ to its ninth position. In posi
the above-traced notching circuit for themagnet
M’-2. The circuit of relay 1’ isfrom the nega
40 tions 9-24 inclusive of switch. IS’ a notching cir
tive terminal of battery BAT’ through Windingof
relay ‘I’, wiper and twenty-third.off-normal’con
cuit is completed for the magnet M'-l through tact of bank 2S’-—2, conductor 454, contacts 382
the wiper and contacts of bank IS’—-5, contacts of relay IA'-'—23, winding of ‘relay. 9’, conductor
452 of relay 4’ and contacts 404 of relay 3’ after - 400, wiper and normal contact of bank IS’-—4
the release impulse is cut off from the line con
to the positive terminal of battery BAT’. While 45
45 ductors so' that the switch IS’ is restored to its the switch 2S’ is moving to its twenty-third posi
normal position.
‘
tion, switch 35’ is operated in‘ a manner hereto
'
When switch IS’ leaves its eighth position, the fore described to move to its twenty-third posi
circuit of relay 6’ is interrupted by the wiper‘ ' tion. As soon as relay ‘I’ is energized and switch
;IS’-4 leaving its eighth off-normal contact. 38’ stops in position 23 so that relay 8’ is main 50'
50 By’ opening its‘ contacts 440, ‘relay ‘6’ interrupts tainedin its energized position, a circuit is com
the heretofore traced notching circuit for magnet pleted' from the negative terminal of battery
28’ so that the switch 2S’ remains in its twenty
BAT’ through contacts 3I5 of relay 8’, contacts
third position until another apparatus unit has 3I6 of relay ‘I’, conductor 3I'I, contactsor?l of
been selected or an automatic operation of an relay 36’,v conductor 3I9, wiper and normal con 55
55 apparatus unit occurs. Since the position of tact of bank 4S’-5, interrupter contact IC’-—4,
switch 38’ is determined by the position of switch winding of relay I3’ to the neutral‘v terminalof
28’, switch 33’ also remains in its twenty-third battery BAT’. ‘Relay I0’ then operates to estab
lish a notching circuit for magnet M’—4 so that
When the selection relays 202-33’ inclusive in the code sender '43’ operates to transmit the 60
60 the remote station are deenergized, the here
code of apparatus unit AU’—-23 in the manner
tofore traced circuit of relay 34’ is interrupted above described to the dispatcher’s o?ice.
I so that this relay drops out. By closing its con
As soon as switch 4S’. leaves its normal posi
tacts 315, relay 34’ completes a circuit-from. the tion, the heretofore described circuit for the zero
positive terminal of battery BAT’ through con
position check relay I is opened. By opening its 65
65 tacts 375, conductor 316, wiper and twenty
contacts I00, relay I extinguishes the start lamp
second to twenty—fourth oif-normal contacts of STL, and byopening its contacts I01, relay I
bank 4S’-6, interrupter contacts IC’——4, wind
interrupts the locking circuit of ‘relay 2. By
ing of relay III’ to the neutral terminal of bat
closing its contacts I21, relay 2 completes, through
tery BAT’. By closing its contacts 320, relay l0’ contacts II‘! of start key ST, a circuitlfor the
70 completes a circuit through the Wiper and con
alarm ALM. Therefore the dispatcher is in
tacts of bank 4S'—-5 for the slow-to-pick up relay formed by the alarm and the extinguishing of the
position.
_
~
-
II’.‘ Relay‘Il’; in turn, completes a circuit for
‘the magnet M'—-4 through contacts 311. Magnet
M’--4 therefore. operates to restore the switch
75 45’ to its normal position. _ Relay. II’ is con
lamp STL that an automatic operation of an
apparatus unit has occurred.
‘p
In the dispatcher’s o?ice the code is received by
2307,1902
- l1 3
for the alarm relay 2 either through the contacts
I ll'l'or I'll depending upon the position of the
check relay I. Relay 2 by closing its contacts
' ioodelreceiving relay‘ ‘CRR'which in the normal
~ ‘position of switch 2Sis connectedacross the line
conductors :by the wiper and normal contact of
_:;:bank.2s>_3'.* Thisicode e?ects the energization of 108 completes a
locking circuit for itself so that
:selection .relays‘l3, l5,- I8, I9, 22’, 24, 25, and the dispatcher ,may
immediately release the?
l'in'the same'manneras described'for the check I alarm
key.
code and the relay II is energizedto effect the
While I have, in accordance with the patent
"operation of the relay-‘MIR, so that itswcontacts
statutes, shown and described my invention as
1243 are closed; Therefore; when the relay 2'! isv , applied
to a particular system and as embodying
energized in response to the switch 38 reaching,
itsrininth position, indicating‘ relay Ill-‘2,3 is
energized so'as‘to close its contacts I 55 and open
"litsicontacts I56‘ to effect the lighting of the‘ green
1amp'G--23 and the white'lamp W—23 and the
extinguishing of thered lamp R—23i
'
- {Since the switch is is in its normal position,
“Fisdeenergized and therefore-the
various devices diagrammatically indicated,
changes and modi?cations will be obvious to
those skilled in the art and I therefore aim in
the appended claims to cover all such changes and
modi?cations as fall within the true spirit and
scope of my invention.
7
What I claim as new and'desire to secure by
15
penergization-of rela' lil-ialsogcompletes a circuit Letters Patent of the United States is:
1. In a supervisory control system, a ?rst sta
Flor ire‘la‘y '28 from the negative terminal of bat
,qter-yBli‘Tithrough contacts 27] of relay 21, con tion, a second station,»apparatus units at said
;i'luctor, l'?leon'tacts ‘I60 of relay lie, conductor , second station, two line conductors interconnect J20
6 l fwindin‘g of relay 28, to the neutral terminal of
ing-said stations, means including said conduc
tors in series for selecting any of said units for
yltheilocking cirmiits of the energized select-ion re‘ operation, a, control ‘device at said ?rst station
laysv‘in.‘ the dispatchers o?ice by e?ectin'g the c for controlling the operation of a selected appa
t t' s Mtt'ery-ZBAT. ‘Theenergization of'i‘elayl? opens
‘{en'erg‘iization of ‘relay ii and er?’ects the movement
' I fofsvv’itch 733 to itsnormalpositioniandoperates
Footiev transmitting relay CTR. so, that a release
ratus unit, means responsive to the movement -" i
of said device to a predetermined position for
‘causing a limited current to flow through said
conductors in series, means controlled by said
impulse is transmitted over the -=1inc conductors
L-—,IYand“ L-Z [in the manner previously de
limited current for
§{ In ‘the remote Station the switch ‘S’, ‘does 7110i;
the operation ‘of the selected apparatus unit,
means responsive to the operation of the selected
_ t .- stop‘in’position
‘2'2
“
‘ hut continlies to operate {until
normal position since ‘a, notohing
jcir" reaches
cult for magnet ‘Mi-4‘ is completed through‘
effecting an increase in the
current through, said conductors in series and
apparatus ‘unit ‘for decreasing the current
t" o'ugh fsai‘d v‘conductors, and means responsive
Y 'tljie'jcontac‘t‘s ‘375 ‘of theldeener'gizedrclay 34’ when , to ‘said increase and subsequent decrease in the ‘
the‘ switch
p
’
positions 2244 inclusive],
current through said conductors for preventing
' imposition-s 2'3 and ‘2t cl" switch is a circuit i-‘for. 5said control device from again effecting the ?ow
‘ 1/ relay I8 is completed through the wiper and con
of current through said conductors while said
tacts‘ ofib'ank '4S"~—~4. ~li3y closing its contacts control device remains in said predetermined
connects the ‘winding of relay 19’
"across the‘ii'ne conductor
‘and L—-2 so that
the relay I9" receives the release impulse sent out
position,
'
, that the relay [9"
for operation, a control device at said ?rst sta
tion‘for controlling the operation of a selected
410
I 2., In a supervisory control system, a ?rst sta
tion,‘ asecond station, apparatus units at said
second station, two line conductors intercon
necting said stations, means including said con
- down by the addition o‘iSrelay'I I’ so as to‘insure ~ ductors in series for selecting any of said units
{I from ‘the 'di'spateher’s o?ce. The notching of
'45 switch
.
in positions >21-24 inclusive is slowed
remains connected acrosslthe
‘ line conductors for a su?icient lengthof time“ to
receive this release impulse. By closing its con:
‘completes a circuit fromithe
: positive ‘ terminal of battery BAT’ through
y
,
. apparatus unit, means responsive to the move
ment of said device to a predetermined position
for causing a limited'current to flow through
v , auxiliary contacts 32! on apparatus unit AU’—'23, ~ said conductors in series, timing means, means
‘winding of relay IA"-=23,, wiper and, twenty-third
I _,
‘ vo'iI-normalcontact of bank 2S'-—3,' conductor 381, ‘
, Q55‘ contacts
386, of I relay '
l9’, to 'the‘neutral ter
'mina‘lof’fbattery BAT’; ,By; closing its contacts
a ' - SBO‘rela'yYIA’V-43 completesa'locking circuit for
responsive to said limited current for effecting
the operation of said timing means, means con
, trolled by said timing means for effecting after
a predetermined time interval an increase in '
the current through said conductors and the
V itself‘around the contacts 386 of relay l9’ so that operation of a selected apparatus unit, means
wrelay ‘IA"—23‘ remains energized until ‘the ap
responsive to ‘the operation of the selected appa
I’
paratus unit_>AU’—23 again changes its posi ratus-wunit for decreasing the current through
said conductors, and means responsive to said
reaches itsjnormal
position, ,in'c'reaseand
subsequent decrease in the current
"relay I,’ is energized" and completes
v
the, above
7 ~ _ traced zero position check‘ circuit so that the relay
through said conductors for preventing said con
trol device from again causing current to ?ow
(,5, ‘! liinlthe ‘dispatcher’s ‘oi?ce is energized to e?ect , i through
said ‘conductors while said control de
' the?’ lighting of the start lamp STL, ' "
'
‘
' ,
" ifthe indication of the ‘changed condition
vice remains in said predetermined position. I
3. In a supervisory control system, a ?rst sta
of; the apparatus unit ‘AU'—-23 is sent to the'dis
patcher’s o?lce'. and the supervisory equipment is ' . tion, a second’ station, apparatus units at said
'_ thenx'reset for ‘the ‘next
operation. ‘
The dis?
plaitcher extinguishers the white ‘lamp W-—23 r-by
turning the’ control‘key CK+23V to the position
' thereof which agrees with that. of the‘open cir
yigcuitvbreakere *Hefcuts'o? thejalarm-by operat
, 'ingi'hls“ alarm
key AK‘ which ‘completes a circuit‘
second station, two line conductors intercon- »
necting said stations, means including said con
ductors in series for selecting’any of said units
for operation, a control device at said ?rst sta
tionfor controlling the operation of a selected
apparatus unit,’ a relay, means responsive to the
movement of said device to a predetermined po
60
2,107,902
14
sition for connecting said source in series with
said conductors and said relay, a time relay,
means responsive to the energization of said ?rst
mentioned relay for completing an operating cir
cuit for said time relay through said conductors
in series, a control relay, means responsive to
signalling devices individual to the selected unit,
means including said conductors in series for
operating the selected unit, means including said
the operation of said time relay for completing
an operating circuit for said control relay through
said conductors in series, means responsive to '
10 the operation of said control relay for effecting
the operation of the selected apparatus unit,
means responsive to the operation of the selected
apparatus unit for interrupting the circuits of
said time and control relays for a predetermined
15 time interval, and means responsive to the cur
rent variations through
duced by the completion
ruption of the circuits of
relays for e?ecting the
said conductors pro
and subsequent inter
conductors in series for controlling the signalling
devices individual to the selected unit in accord
ance with the position thereof, and switching
means at each station for controlling the con
nections to said line'conductors so asito e?ect
said selecting, operating, and controlling op
v10
erations.
'
'
6. Ina supervisory control system, a control
ling station, a controlled station, a plurality "of
apparatus units at said controlled station, two
line conductors interconnecting said stations,
control devices at said controlling station indi 15
vidual to said units, signalling devices at said
controlling station'individual to said units, means
responsive to a predetermined operation of any
said time and control
of said control devices for effecting the trans
disconnection of said
mission through said conductors in series'of’ a 20
20 source from said conductors and for maintain
predetermined
number of impulses of different
ing them disconnected as long as said control
character
permutated
individual to the operated
device remains in said predetermined position.
control device, selective means at said controlled
4. In a supervisory control system, a control
station responsive to said impulses for selecting
ling station, a controlled station, a plurality of one of said units, means responsive to the selec 25
25 ‘apparatus units at said controlled station, two
line conductors interconnecting said stations, tion of a unit for effecting the transmission
through said conductors in series of a predeter
control devices at said controlling station indi
vidual to said units, signalling devices at said mined number of impulses of different character
permutated individual to the selected unit, fol~ 30
controlling station individual to said units, means
lowed by an indicating impulse of g a' character
30 responsive to a predetermined operation of any
dependent upon the position of the selected unit,
of said control devices for effecting the trans
selective means at said controlling station re
mission through said conductors in series of a
sponsive to said last mentioned predetermined
predetermined number of impulses of different number
of impulses for selecting the signalling
character permutated individual to the operated devices individual to the selected unit, means ‘ '
35 control device, selective means at said controlled
station responsive to said impulses for selecting responsive to said indicating impulse for control
ling the operation of the selected signalling de
one of said units, means responsive to the selec
vice, means including said conductors in series
tion of a unit for effecting the transmission
for operating the selected unit, and switching 40
through said conductors in series of a prede
means at each station for controlling the‘con
40 termined number of impulses of different char
to said line conductors so as to effect
acter permutated individual to the selected unit, nections
said selecting, operating, and controlling op
selective vmeans at said controlling station re
sponsive to said last mentioned impulses for se
lecting the signalling devices individual to the
45 selected unit, means including said conductors
in series for operating the selected unit, means
including said conductors in series for control
ling the signalling device individual to the se
lected unit in accordance with the position
50 thereof, and switching means at each station
for controlling the connections to said line con
ductors so as to e?ect said selecting, operating,
and controlling operations,
5. In a supervisory control system, a control
55 ling station, a controlled station, a plurality of
apparatus units at said controlled station, two
line conductors interconnecting said stations,
control devices at said controlling station indi
vidual to said units, signalling devices at said
60 controlling station individual to said units, means
responsive to a predetermined operation of any
of said control devices for effecting the trans
mission through said conductors in series of a
65
predetermined number of impulses of opposite
polarity permutated individual to the operated
control device, selective means at said controlled
erations.
'
.
'7. In a supervisory control ‘system, a control;
ling station, a controlled station, a plurality of
apparatus units at said controlled station, two
line conductors interconnecting said stations,
control devices at said controlling station indi
vidual to said units. signalling devices at said
controlling station individual to said units, means
responsive to a predetermined operation of any
of said control devices for effecting the trans
mission through said conduc'tors in series of'a
predetermined number of impulses of different
character permutated individual to the operated
control device, selective means at said controlled
station responsive to said impulses for selecting
one of said units, means responsive to the selec
tion of a unit for effecting the transmission
through said conductors in series of a predeter+
mined number of impulses of different character
permutated individual to the selected unit fol
lowed by an, indicating impulse of a character
dependent upon the position of the selected unit,
selective means at said controlling station re
sponsive to said last mentioned predetermined‘
statio-nresponsive to said impulses for selecting
number of impulses for selecting the signalling
one of said units, means responsive to the selec
tion of a unit for effecting the transmission
70
through said conductors in series of a de?nite
sponsive to said indicatingimpulse for control-v
ling the operation of the selected signalling de
number of impulses of opposite polarity permu
tated individual to the selected unit, selective
for operating the selected unit from the control-'
means at said controlling station responsive to
75 said last mentioned impulses for selecting the
device individual to the selected unit, means re
vices, means including said conductors in series
ling station only if the selected unit‘ corresponds
to the operated control device, and switching
2,107,902
means at each station for controlling the con
nections to said line conductors so as to effect
15
to e?ect the operation of the selected signalling
devices in accordance with the new position of
the selected unit, and switching means at each
tions.
‘
station
for controlling the connections to said
8. In a supervisory control system, a control
line conductors so as to e?ect said selecting, op
ling station, a controlled station, a plurality of ' erating,
and controlling operations.
apparatus units at said controlled station, two
said selecting, operating, and controlling opera
line conductors interconnecting said stations,
control devices at said controlling station indi
10 vidual to said units, signalling devices at said
igcontrolling station individual to said units,
means responsive to 'a predetermined ‘operation
of any of ‘said control devices for e?ecting the
‘ transmission throughsaid conductors in series
‘ 10. In a supervisory control system, a control
ling station, a controlled station, a plurality of
apparatus units at vsaid controlled station, two
line conductors interconnecting said stations, 10
control devices at said controlling station indi
vidual to said units, signalling devices at said
controlling station individual to said units, means
15, of a predetermined number of impulses of dif~
responsive to- a predetermined operation of any
ferent character permutated individual to the
operated‘ control device, selective means at said
controlled station responsive to said impulses for
mission through said conductors in series of a
, selecting one of said units, means responsive to
20'
the selection of a unit for effecting the transmis
,- sion through said conductors in series of a pre
‘ determined number of impulses of different char
2,5
selective means at saidfcontrolling station re
sponsive to saidlast'mentioned predetermined
number of impulses for selecting the signalling
sponsive to said indicating impulse for control-
15
predetermined number of impulses ‘of opposite
polarity permutated individual to the operated
control device, selective means at said controlled
station responsive to said impulses for selecting 20
one of said units, means responsive to the selec
:acter permutated individual to the selected 'unit
'followed by an indicating impulse of a polarity
‘dependent upon the position of the selectedv unit,
’ devices individual to the selected unit, means re~
30
of said control devices for effecting the trans
tion of a unit for eiTecting the transmission
through said conductors in series of a predeter
mined number of impulses of opposite polarity
permutated individual to the selected unit fol 25
lowed by an indicating impulse of a polarity de
pendent upon the position of the selected unit,
selective means at said controlling station re
, sponsive to said last mentioned predetermined
number of impulses for selecting the signalling 30
ling the operation of the selected signalling de
individual to the selected unit, means
vices,’ means operative only if the selected unit 'devices
corresponds to the operated'control device for responsive to said indicating impulse for con
transmitting through saidconducto-rs in series trolling the operation of the selected signalling
35 an operating impulse of a predetermined polar
devices, means operative only if the selected unit
- ity,,means at the controlled station responsive to corresponds to the operated control device for
' lsaid operating impulse for operating the selected
‘ unit, and switching means at
.
each station for
controlling the connections to said line conduc~
40 tors-so as to e?ect said selecting, operating, and
. controlling operations.
9. In a supervisory control system, a control
"ling station, a controlled station, a plurality of
apparatus units at said controlled station, two
line conductors interconnecting said stations,
controlvdevices at said controlling station indi
vidual to said units, means responsive to a pre
determined operation of any of said control de
transmitting through said conductors in series
an operating impulse of a predetermined polar
ity, means at the controlled station responsive to
said operating impulse for operating the selected
unit, and switching means at each station for 40
controlling the connections to said line conduc
tors so as to e?ect said selecting, operating, and
controlling operations.
' 11. In a supervisory control system, a control
ling station, a controlled station, a vplurality of 45
apparatus units at said controlled station, two line
7 conductors interconnecting said stations, con,
vices for effecting the transmission through said trol devices at said controlling station individual
‘conductors iniseries of a'predetermined number to said units, signalling devicesat said control
of impulses of diii'erent character permutated _ ling station individual to said units, means re
V 1 individual to the operated control device, selecé
tive means at said controlled station responsive
" to'sjaid impulses for selectingone of said units,
- means responsive to the selection of a unit for ef
fecting the transmission through said conductors
in series of a predetermined number of impulses
" of ‘different characterpermutated individual to
‘the selected unit followed by an' indicating im
pulseof a character dependent upon theposition
'
sponsive to a’ predetermined operation of any of
said control devices for e?ecting the transmission
through said conductors in series of a predeter
mined number of impulses of opposite polarity
permutated individual to the operated control i
device, selective means at said controlled station
responsive to said impulses for selecting one of
saidunits, means responsive to the selection of a
unit for effecting the transmission through said
conductors in series of a predetermined number
of impulses of opposite polarity permutated in
dividual to the selected unit followed by an indi
. predetermined number of
impulses for selecting cating
impulse of a polarity dependent upon the
'grthe signalling devices individual to the selected
position of the selected unit, selective means at
;unit, means responsive to said indicating im
pulse for controlling the operation of the selected said controlling station responsive to said last
of theselected unit, selective means at said con~
' trolling station responsive to said last mentioned
signalling devices, means‘operative only if the
selected unit corresponds to the operated control "
device for- transmitting through said conductors
' r in series an operating impulse of a predetermined
echaracter, means at the controlled station re
sponsive'to said operating impulse for operating
the selected unit, means‘ responsive to said opera
tion of the selected unit for ‘transmitting through
said conductors infseries an indicating impulse
mentioned predetermined number of impulses
for selecting the signalling devices individual to
the selected unit, means responsive to said in
dicating impulse for controlling the operation of
the selected signalling devices, means operative 70
only if the selected unit corresponds to the oper
ated control device for transmitting through said
conductors in series an operating impulse of a
predetermined polarity, means at the controlled
station‘ responsive to said operating impulse for
75
16
7
2,107,902
unit, and switching means at each station
operating the selected unit, means responsive to selected
for
controlling
the connections to said line con
said operation of the selected unit for transmit
ductors so as to effect said selecting, operating,
ting through said conductors in series an indi
and controlling operations.
cating impulse of a predetermined polarity to‘ ef
fect the operation of the selected signalling de
JAMES H. OLIVER.
vices in accordance with the new position of the
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