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Патент USA US2082740

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June 1, 1937. -
I
R. M. PHlNNEjY
' CENTRALIZED TRAFFIC
2,082,740
CONTROL SYSTEM
Filed April 14, 1930
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INVENTOR
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¢QV ATTORNEY
June 1, 1937.
‘
R_ M_ pHmNEY
‘ '
2,082,740
CENTRALIZED TRAFFIC CONTROL SYSTEM
Filed April 14, 1930
3 Sheets-Sheet 2 .
246245‘42542
O
INVENTOR
BY
WM W
MATTORNEY
June 1, 1937.
R. M. PHl-NNEY
2,082,740
CENTRALIZED TRAFFIC CONTROL SYSTEM
Filed April 14, 1930
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Patented June I‘, 1937
2,082,740 “
UNITED STATES PATENT OFFICE
2,082,740
OENTRALIZED TRAFFIC CONTROL SYSTEM
Robert M. Phinney, Rochester,‘N. Y., assignor to
General Railway Signal Company, Rochester,
N. Y.
Application April 14, 1930, Serial No. 444,146
31 Claims. (C1. 246-3)
This invention relates to centralized tra?ic controlling systems, and more particularly to such a
system of the synchronous selector type employ
ing cycles of impulses having distinctive starting
5 characteristics.
Generally speaking the present invention is an
improvement of the general system shown in the
prior joint application of R. C. Leake and R. M.
‘ Phinney, Ser. No. 385,740, ?led August 14, 1929,
10 and contemplates the use of interconnecting cir
cuits which make the system more positive in its
operation, more economical and more reliable.
In the system of the prior application, each
cycle of operation, insofar as the stepping opera
15 tion is concerned, is exactly the same; for this
reason a stepping relay is actuated at every way
station in response to the ?rst impulse of the
stepping cycle. Obviously, it would be desirable
to have some of the wayside locations unrespon
20 sive to certain cycles, whereas other wayside loca—
tions would respond to such cycles, so that a more
economical system would result in that none of
the wayside locations would require apparatus
which would respond to each step in each cycle.
25 Putting it in other words, it is proposed in accord
ance with the present invention to employ a
synchronous selector system in which means is
30
35
40
45
provided for distinctively starting the way station
selectors, depending upon whether the ?rst step
ping impulse is of positive polarity or is of nega
tive polarity. Generally speaking, the system, in
accordance with the present invention is pref
erably divided in two parts, the selectors of one
part of which start only if the ?rst impulse in the
stepping cycle is one of positive polarity, and the
selectors of the other part of which start only if
the ?rst impulse is one of negative polarity, where
by the total impulses of a particular cycle can be
approximately half the total number of message
circuits of the entire system.
Another feature of the present invention con
sists in the provision of means for normally hold
ing the system at rest, and consists in means for
initiating a cycle of stepping impulses in which
the ?rst impulse is of positive polarity in the event
that a lever is operated which requires a cycle of
operation the ?rst impulse of which is of positive
polarity to transmit the desired control, and in
providing means for initiating the system with a
50 starting impulse of negative polarity in response
to a lever movement, providing the lever moved is
one of which transmits its control only during a
cycle of impulses the ?rst of which is of negative
polarity; and in the provision of means for oper
55 ating the system through‘ both of these cycles in
the event there is a way station which is in con
dition for transmission of a change in traffic con
ditions, such as track occupancy.
Other objects, purposes and characteristic fea
tur‘es of the present invention will in part be 5
understood from the accompanying drawings and
will in part be pointed out in the description here
inafter.
In describing the invention in detail, reference
will be made vto the accompanying drawings in 10
which:
Figs. 1A and 13, if laid end to end constitute a
conventional showing of the devices and circuits
in the central operator’s ol?ce of the centralized
traffic controlling system; and,
15
Fig. 2 conventionally shows two way stations of
one form of way station apparatus adapted to be
controlled by, and transmit indications to, the
central of?ce equipment shown in Figs. 1A and 1B.
The present invention contemplates operating 20“
the switch machines and signals at a large number
of passing sidings on single track railroads, on
double track railroads, at small interlocking
plants, and in fact at any location where train
movement must be dictated from a central of?ce, N 5
such for instance as the junction point of a branch
road with the main line. In other words, in ac
cordance with the present invention there will be
many wayside locations, even though the particu
lar portion of the invention illustrated in the 30-1
drawings shows only two such Wayside locations,
one at the west end of a passing siding PS and the
other at the east end of such passing siding. It
is contemplated that in the central o?ice the en~
tire railway system, to which the present inven- 35
tion is applied, is reproduced in miniature, as con—
ventionally shown by the miniature passing sid
ing ps (see Fig. 1A).
The passing siding PS (see Fig. 2) has the two
track switches associated therewith, controlled by 40
switch machines SM1 and SW. The east end
track switch is provided with the usual detector
track circuit insulated from the rest of the system
by insulating joints l6, and includes the usual
track battery I‘! and the usual detector track relay 45
TR2; the west end of the passing sidings includes
a similar track circuit, including a track battery
l8 ‘and a track relay TR1. The east end of the
passing siding PS is provided with the usual main
starting signal EM, dwarf starting signal Ed, main 50
entering signal WM and dwarf entering, or take
siding, signal Wd. These switch machines SM1
and SMZ, and the signals associated with the track
switches controlled by these switch machines, are
controlled over the selector system embodying the 55
2
2,082,740
present invention, and of which only one speci?c
embodiment has for convenience been illustrated.
Referring to Fig. 2 it will be noted that the series
of stepping relays I1, 21, 31, 41 and 51 are con
trolled by the line relay U31 and the slow acting
relay I1 ; whereas the stepping relays H2, I22, I 32,
M2 and I52 are controlled by the line relay LR2
and the slow acting relay 12. It is contemplated
that the polar magnetic stick type relays SR1 and
10 DB1, which are used for controlling the signals
at the west end of the passing siding PS, and the
switch machine polar magnetic stick type relay
SMR1 which controls the switch machine 5M1,
will be controlled over the message line 20 through
15 the medium of the stepping relays of that way
side location, namely, way station No.‘ 1. Simi
larly the corresponding relays SR2, DR.2 and
SMR2 are controlled over the same message wire
20 through the medium of the stepping relays
20 at the local o?ice at the east end of the passing
siding PS, namely, way station No. 2. -
Attention is directed to- the fact that the wir
ing of the various relays associated with way sta
tion No. 1 is exactly the same as the Wiring of the
2.5 various relays of way station No. 2, except in one
particular, namely, that the main control contact
ill of the line relay LRlhas its left hand sta
stated, that the stepping apparatus shown in
Fig. 1A applies a starting impulse of positive
polarity, whereas the stepping apparatus shown in
Fig. 1B starts its cycle of impulses by an impulse
of negative polarity. It may also be stated here,
that the relay FA (see Fig. 1A) is a ?eld starting
relay, and is provided to initiate ?rst the appara
tus shown in Fig. 1A and then the apparatus
shown in Fig. 1B, or vice versa, in the event a
change of indication is to be transmitted from 10
a wayside local o?ice.
Also, it may be pointed out that the lever
LS1 controls the signals at the west end of the
passing siding PS, the lever LISMl controls the
switch machine SMI, the lever LS2, controls the
signals EM, Ed, WM and WC‘, and the lever LSM2
controls the switch machine SMZ. Similarly, the
indicating relays IR.1 and IR2 are controlled
through the medium of the selector system in ac
cordance with the condition of occupancy of the in!)
detector track circuits including track relays TR1
and TR,2 respectively.
The relays Aa, Be, Ab and Bb may for con
venience be called repeat-cycle relays, in that
they cause the apparatus to go through two suc
cessive cycles in response to each initiation of the
portion of the system in which they are con
tionary contact 25 connected to the positive termi- ,, tained.
nal of the battery iii ‘and has its right hand sta
The relays E1, E2, E3, F1, F2 and F3 may con
tionary contact 25 connected to the negative ter-y I veniently be called master relays, in that these CO.
minal of this battery 3!, whereas the stationary relays are the ones that supply stepping current
contacts of the corresponding movable contact to the stepping Wire 36. Three of these relays are
23 of the line relay LE2 has its stationary contacts
connected to the opposite terminals of the corre
35 . sponding battery 32.
Attention is now directed to the fact that in
case the line relays LR1 and LR2 are operated
toward the right on the ?rst step,_as is the case
when the line circuit
is energized with positive
40
polarity, the slow acting relays I1 and I2 will be
'picked up after a short time.
Also, attention is
directed, to thefact that with the line relays
LE1 and LR2 operated toward the right, the step
ping relay tl will‘ be picked up and the stepping
relay l i2 will not be picked up, this because both
4.5
' sides of the coil‘ of the stepping relay l I2 are con
nected to the same side, namely the positive ter
minal, of the battery 32. If, on the other hand,
the line relays LE1 and LRzaare operated toward
the left during the ?rst step, and before the slow
acting relays I1 and I2 have picked up, the step
ping relay' l E2 will pick up and the stepping, relay
I1 will not'pick up. In other words, the stepping
relays of way station No. 1 areoperated only in
55 the event that the operating cycle is started with
used, even though one would su?ice, three being
used in order to slow down the stepping operation
of the system, and in this case it should be noted
that the relay E2 repeats the relay E1, and the
relay E3 repeats the relay E, as is also true of the
relays F1, F2 and F3.
The relays We and Wb may conveniently be
called control relays, because they must be ener 40.,
gized in order to connect the stepping line to the
central of?ce equipment, or in other words they
determine whether stepping impulses shall be
transmitted to the way station apparatus.
The relays CRa and CR)’ may conveniently be 45"
called starting relays, in that these relays again
pick up respectively the relays W3 and WlO after
the completion of a cycle of operation followed
by the necessary period of blank, which period
of blank is determined by the time required for
the slow acting relays Ia and lb to again assume
their deenergized position.
The relays LR? and LR,0 are of course the line
relays, and the relays l, 2, 3, it, 5 and H, l2, vl3, Ill
and I5 are the stepping relays, or channel com
a positive polarity impulse, and the stepping re
pleting relays, a separate message channel ex
lays of way station No. 2 will only be operated in tending from the central c?ice equipment to a
the event that the operating cycle is started with , channel relay or channel contact at a distant
a. negative impulse.
>
69,,
Let us now refer to Figs. 1A and 1B and ob
serve the central oi?ce apparatus required to
create the two diiierent kinds of cycles of im
pulses, and the manner in whichthis o?ice equip
ment cooperates with the wayside apparatus.
The relays LRa, We, CR3, E1, E2, E3, Ia, A8, Ba, I , 2,
3, it and 5 shown in Fig. 1A correspond respective
ly to the relays LRb, Wb, CR”, F1, F2, F3, 1'“, Ab, B”,
H, [2, l3, ill and 85 shown in Fig. 1B. These
two groups of relays may be said to be the relays
70 which enter into the stepping organization of the
central oiliceequipment.
I
The transfer relay TB, is a relay that selects
whether the stepping apparatus shown in Fig. 1A
or the stepping apparatus shown in Fig.13 shall
75 vbe operated, and in thisconnection it may be
way station, such a message channel being com
pleted for each step in a cycle of operation of
the system.
Having now brie?y pointed out the purpose for
which each relay of the system is used, it is con
sidered expedient to consider the operation of
the system in order to get a more clear under
standing of the operating characteristics of the
system and the economy experienced in dividing
the various way stations into two groups, one
group of which is operated only in the event a
cycle is started with an impulse of positive po
larity and the other group of which is only oper
ated in the event the cycle is started with, an,
impulse of negative polarity, each of these groups
including a large number of way stations.
Operation-Let us assume that the selector
2,082,740 .
system is in its normal at-rest condition, and
that the central oliice operator anticipates the.
approach of an east bound train which is to take
the side track of the passing siding PS, and that
5 he wishes to operate the switch machine SM1
to the take-siding position. The operator will
?rst move the switch machine lever LSM1 from
its right hand normal position to its left hand
dotted position, thereby momentarily closing a
10 pick-up circuit for the relays Ag and Ba readily
traced in the drawings and including the wires
33 and 34. With this circuit momentarily com
pleted the relays Aa and Ba will pick up, and the
relay Aa will have its stick circuit, including its
15 stick contact 35 and the back contacts 30 and
3l of the relays ItI and CRa in multiple closed,
so that the relay Aa will remain energized by
current ?owing in this stick circuit after the
momentary closure of the pick-up circuit no
20 longer maintains this relay energized. Similarly,
a stick circuit is closed for the relay Ba, which
the right, thereby causing its contacts 68 to apply
current to the upper winding of the relay E? which
current then operates the relay E? to the right
and causes its contact 61 to apply current to the
upper winding of the relay E3, thereby operating
this relay to the right. With the relays E1, E2 and
E3 assuming the right hand position, the stepi~
ping line 30 is energized by current of positive po
includes its stick contact 38 and the back con
tact 39 of the channel selecting relay 4. In this
connection it should be noted that the stick cir
25 cuit for the relay l2»a also includes the upper wind
ing of the relay Aa, so that the relay Aa will not
drop even though its stick circuit including its
stick contact 35 is temporarily opened.
With the relay Aa picked up and its contacts
30 35, M, 42 and 43 closed, the closure of the con
tact 43 completes an energizing circuit for the
transfer relay TR. This circuit may be traced
as follows:--beginning at the terminal B1 of a
suitable source of direct current, back contact 44
of the relay Ab (see Fig. 1B)., wire 45, front con
tact 43 of the relay Aa, wires 46 and ill, upper
winding of the transfer relay TR, to the other
terminal B— of said source of current.
The completion of this circuit operates the
40 transfer relay TR toward the left, thereby break
ing the line circuit 30 insofar as the apparatus
of Fig. 1B is concerned at the contact 48 of the
relay TR, this contact 48 in its left hand position
connecting the stepping wire 30 to the branch
45 stepping line 30*‘ connected to the apparatus
shown in Fig. 1A. Also, operation of the contact
49 of the transfer relay TR to its left hand posi
tion completes the following circuit for the start
ing relay CRPz-beginning at the terminal 3-,
contact 49 of the transfer relay TB in its left
hand position, wire 50, front contact III of the
relay Aa, Wire‘5I, winding of the starting relay
CR“, wire 52, back contact 53 of the relay Ia, to
the other terminal 3-]- of said source. The com
55 pletion of the circuit just traced picks up the
starting relay CR", which relay CRa then closes
a pick—up circuit for the control relay Wa includ
ing the front contact 31 of the relay CRa and
readily traced in the drawings. With the relay
60 Wa assuming its energized position the stepping
line 30a—30 is closed at'the front contact 55 of
the relay We, but this stepping circuit is still open
at the contacts 54 and 85 of master relays E2
and E3.
65 Also, picking up of the relay Wa applies current
to the upper winding‘ of the master relay E1 op
erating this relay E1 to a right hand position,
which circuit may be traced as follows:—starting
at the terminal B+, front contact 56 of the relay
70 We, wire 51, back contact 58 of the stepping relay
I, wire 59, back contact 60 of the stepping relay
2, wire BI, back contact 52 of the stepping relay
3, wires 83, 64 and 65, upper winding of the relay
E1 to the terminal B—. The completion of this
75 circuit causes the relay E1 to be operated toward
larity through a circuit which may be traced as
follows:—— beginning at the terminal B+ of the 10
central office battery, contact 54 of the relay E2,
toward the right, wire 86, contact 85 of the relays
E3 to the right, wire 68, front contact 55 of the
relay We, wire 69, line relay LR“, wire 38*‘, contact
58 of the transfer relay TR. (see Fig. 1B) ,. wire 30,
line relay LR,l (see Fig. 2), line wire 30, line re
lay LR2, line wire 30 connected to the common
return wire C at the distant end of the system,
which common return wire C, may be grounded if
desired, and is connected to the mid-point of the
central oi?ce battery or other suitable direct cur
rent source.
The flow of current in the circuit just traced
causes all of the line relays LR“, LE1, LE2, etc.
to be operated toward the right. Movement of
the contact ‘I0 of the line relay LRa toward the
right completes an energizing circuit for the step
ping relay I as followsz-beginning at the ter
minal 13+, contact ‘I0 of the relay L15’.a to the
right, wire ‘I I, back contact ‘I2 of relay Ia, wire ‘I3,
bottom winding of the stepping relay I, wires ‘M
andl'l5, back contact ‘I8 of the stepping relay 2,
wires TI and ‘I8, to the other terminal B-. The
completion of this circuit picks up relay I, which to Cl
then sticks up as soon as thexrelay Ia reaches its
energized position. This stick circuit may be
traced as follows:—beginning, at the terminal
B+, front contact 53 of the relay Ia, wires 80 and
BI, stick contact 82 of the relay I, wire 83, upper,
winding of the relay I, wires 84 and '85, back 40,
contact 15 of the relay 2, wires TI and '58 to the ‘
other terminal B—.
Similarly, movement of contact 2| of the re
lay LR1 toward the right, closes the following
pick-up circuit for relay Pt-beginning at the .45
negative terminal of the battery 3!, wires 2'? and
28, contact ?.I of relay LE1, wire I02, back con
tact I03 of the relay I1, wire I04, lower winding
of relay I1, wires I05 and I05, back contact I01 of
the relay 21, wires I08 and I09, to the positive
terminal of the'battery. The relay I1 when once
picked up will of course stick up through the fol
lowing stick circuit after relay 11 has picked
up:--beginning at the negative terminal of the
battery 3|, wires H2 and H3, front contact II4
of relay I1, wires H5 and H6, stick contact Ill,
wire IE8, resistance H9, upper coil of relay 51,
wires I20 and I08, back contact I01 of relay 21,
wires I08 and I09, back to- the battery 3!.
.
With the relay I picked
the main circuit for
the upper winding of the relay E1 is broken at the
back contact 58 of the relay I, and an auxiliary
energizing circuit for the upper winding of the
master relay E1 is completed which auxiliary ener
gizing circuit may be traced as follows:—begin
ning at the terminal B+, front contact 55 of the
relay Wa, wire 51, front contact 59 of the stepping
relay I, wire 81, front contact 88 of the relay CRa,
wires 89 and 55, upper winding of the relay E1,
to the other terminal B—.
Picking up of the slow acting relay Ia breaks
the energizing circuit for the starting relay CRa
at the back contact 53 0f the relay Ia, thus drop
ping the control relay CRa'and causing its con
tact 88 to shift the circuit forenergizing the re
4,
2,082,740
lay E1 from the upper winding to the lower wind
ing of the master relay E1, and this shifting of the
auxiliary circuit from. the upper to the lower
winding, these windings having their turns oppo
sitely arranged, causes the master'relay E‘1 to be
operated toward the left. Also, picking up of
the slow‘ acting relay Ia completes the following
stick circuit for the relay Win-beginning at the
terminal B+, front contact 36 of the relay Ia, wire
10 90, back contact 9| of the stepping relay 5, wire
92, front st-ickcontact 93 of the relay We, wires
94-and 95, winding of the relay Wa to the other
terminal B, so that this relay WEL is stuck up and
remains stuck up until either energization of the
15 relay 5 has taken place or deenergization of the
relay Ia has taken place.
The application of stepping current of positive
and then of negative polarity alternately to the
stepping wire 30 will of course operate the line re
20 laysi-LR,1 and LRZ. It has been heretofore pointed
25
out that dropping of the relay CRa has shifted the
circuit from the upper to the lower coil. of the
mas'ter'relay’E1 and‘ has caused this relay E1 to
be operated to the left.‘ This in turn causes the
relays E2 and E3 to be operated toward the left,
thereby‘completing the following circuit for ener
gizing the stepping line 39 with negative polar
ityt-beginning' at‘ the terminal B—, contact 98
of the relay E2, wire 99, contact 85 of the relay
30
E3 toward the left, wire 68, front contact '55 of
{the relay We, Wire 69, line relay LRa, wire 39“,
contact 48 of the transfer relay TR, to the step
ping‘wire 3'0‘ and through relays LR1 and LR2 to
the distant end, which is connected to the com
mon‘ return wire C, which common return wire C
is in turn connected to the mid-point of a suit
able three' terminal battery ‘or generator (con
ventionally represented by the reference charac
ters 3+, 3- and C)‘ in the central office. Opera
tion'of the line relay LRa, toward the left will
close the pick-up circuit‘ for the bottom winding
of the stepping relay 2 through a circuit readily
traced in the drawings and including a front
.conta'ct I09 of the relay I and back contact I23 of
the relay 3.
Similarly at way station No. 1, operation of
the line‘relay LR1 (see-Fig. 2) to the left, picks
up the relay 21 through a circuit readilyv traced
‘,and including front contact I24 of the relay I1
"and back contact I25 of the relay 31. Picking
up of the relays 2 and 21, will of course drop
the relays I and I1 by reason of lifting of the
contacts ‘I6’ and H11, respectively. Dropping of
the contact 58 of the relay I (see Fig. IA), re
moves energy from the wire 81, so that neither
of the two auxiliary circuits for the relay E1
can hereafter be completed; also,‘ dropping of
this contact‘58 applies current‘ to the upper wind
ing of the relay E1 through the following’cir
cuitz-beginning at the terminal 13+, front con
tact 56 of the relay'Wa, wire 51, back contact
Bil-‘of thevrelay I, wire 59, front contact 60 of
the relay 2,‘.wires ‘I9, 64 and 65, upper winding
of the relay E1 to the terminal B—. The flow
of current in this circuit will operate‘the' relay
E1 to the'right; which for reasons heretofore
given-causes the relays E2 and E3 to be sequen
tially moved to the right, thereby again ap—'
plying stepping. current of- positive polarity to"
70 the stepping circuit 39, and affecting operation
of-the relays LR)‘, LE1 and LE2 to'the right.‘
With these line- relays'operated to the'right
hand position the stepping relay 3 is picked up
through a circuit readily traced in the draw
relay 2 and the back contact I34 of 'the relay 4,
and similarly the relay 31 (see Fig. 2) is picked
up through the medium of the front contact I35
of the relay'21 and the back contact I39 of the
relay 41. These relays 3'and 31 having once
been picked up will be stuck up through circuits
readily traced in the drawings.
Attention is directed to therfact that when
the slow acting relays Ia. and I1 were picked up
the lifting of the contacts I3EI'and I3I of these 10
relays disconnected the, message wire 20 from
the starting circuit branches, which will be de
scribed‘ hereinafter, to the message branches of
the two stepping relay groups I-5, and I1-51.
It will be remembered that the operator moved 15
the lever LSM1 toward the left and thereby ini
tiated operation of the system by picking up the
relays AEL and Ba through the medium‘ of wires
33 and 34. With the relays 3 and 31 now picked
up and stuck up, even though these relays only 20
remainv in their energized stuck-up position for
a moment, the following message circuit is com
pleted for a sufficient period of time to operate
the switch machine relay SMR1 to its left hand
positionz-beginning at the terminal B—, con
tact I38 of the lever LSM1, wire I39, front con
tact I46 of the stepping relay 3, wire IIiI, back
contact I42 of the relay 2, wire I93, back con
tact I44 of the relay I, wire I45, contact I45
of relay E3, to the right, wire I47, contact M8
of the relay E2 to the left, (this message circuit
being completed when the relays E1 and E2 have
already been moved to the left but the relay E3
has not’ yet been moved to the left during the
fourth step of these relays), wire I99, front con 35
tact I39 of the relay 11, message wire 29, wire
I59, (see Fig; 2) front contact I3’I of the relay
I1, wire I5I, back contact I52 of the relay I1,
wire I53,'back contact I54 of the relay 21, wire
I55, front contact I56 of the relay 31, wire I57, 40
winding of‘ the switch'machine relay SMR1, wire
I58, front contact I59 of the relay 31, wire I59,
back contact I6I of the relay 41, wire I62, back
contact I63 of the relay 51, wire I64 of the com
mon return wire C connected to the mid-point
of the central oflice battery.
The ?ow of current of negative polarity
through this relay SMR1 operates this relay to
its left hand dotted position, and since this re
lay SMR1 is of the magnetic stick type, it will
remain in the left hand position after having
been operated there in response to the momen
tary flow of current of negative polarity. At
tention is directed to the fact that the message
circuit at way station No. 1, just traced, includes Cl GI
back contacts of the relays‘ I1, 21, 41 and 51 and
includes front» contacts of the relay 31. The
purpose of this feature is to check the positions
of the'various relays, so that the unauthorized
sticking up of a channel or stepping relay will
prevent the closure of any message circuit. In
this connection it should be noted that the step
ping relay 51 is not used as a channel selecting
relay, it having no channel through a front con
tact, but is merely used to check against a false
sticking up of the relay 42. In’ other words, if
one of the relays should remain up, for any rea
son, the picking up of a second relay would not
permit any message channel circuit to be com
pleted. Putting it another way, the channel cir
cuit branches are so'interlocked that no chan
nel circuit can be completed when two of these
relays are‘ in their energized positions.
After a short interval of time the relay E3
ings-andincludinga front-contact I33 ofv the will also be operated to the left hand position
5
2,082,740
in_response to movement of the relays El and
E2 toward the left, the relay E1 having been
moved toward the left in response to the ap
has not yet dropped‘ in response to this picking
up of the relay Ia the stick circuit for the relay
A8‘, is open at the two back multiple contacts 36
plication of current of positive polarity to the
and 31 of the relays Ia and CR“, so that the re
lay Aa assumes its deenergized position and the
wire E66. Operation of the relay E3 to the left
applies current of negative polarity to the step~
I ping wire 3%, thereby operating the relay LRa
and LE1 toward the left and closing pick-up
circuits for the relays it and 181, which include
system comes to a stop at the end of a second
cycle, this because the starting relay CRa has its
energizing circuit broken at the contact GI of the
relay Aa at the time of dropping ofrelay Ia at
the front contact iii? of relay 3 and back con
10 tact I68 of relay 5, and the front contact I69 of
the end of the second cycle, so that the relay CRa 10
remains down until the relay Aa is again picked
relay 31 and back contact N9 of relay 51, re
spectively. These relays 4 and 41 will then be
stuck up through stick circuits readily traced in
15 the drawings, and will effect deenergization of
up.
the relays 3 and 31.
‘
Dropping of the relay 3 will again apply cur
rent of positive polarity to the wire 64 leading to
the upper coil of the relay E1, thereby operating
20 the relay E1 toward the right, and this relay E1 in
turn will effect operation of the relays E2 and E3
toward the right. Movement of the relay ll}3
toward the right causes current of positive po
larity to be applied to the stepping wire 99, thus
25 operating the line relays LRa and LR1 toward
the right, and thereby picking up the relays 5
and 51' through pick-up circuits including the
front contact I12 of relay 4 and I13 of relay 41,
, respectively.
The relays 5 and 51 will then be
6 stuck up through stick circuits readily traced in
50
QLI Cl
,
U0
C: CA
Let us now assume that the central office op
erator, after having allowed another train to
move over the main track, wishes to allow the east
bound train to continue its east bound movement,
and therefore moves the switch machine lever
LSM2 to its left hand dotted position. This move
ment of the lever LSM2 to its left hand position
momentarily applies current to the repeat cycle
relays Ab and B1) through-the following circuit:
starting at the terminal 13+, lever LSMZ, wires ‘
I11, I18, I19, and I89, winding of the relay B1’,
ing up will e?ect deenergization of the relays 4
wire I8I, upper winding of the relay Ab, to the
terminal B-. With the relays Ab and Bb picked
coil of the relay Aa, thereby effecting deenergiza
:1“
tion, this movement of the relay SMR1 to the 15
left effects operation of the switch machine‘ SM1
to its take-siding position through suitable means
conventionally shown by the dotted line I15, so
that the east bound train may pass into the side
20
track of the passing siding PS.
the drawings, and for obvious reasons their pick
and 41.
Picking up of theyrelay 6 heretofore opened the
stick circuit including" the relay Ba and the upper
w
,
It has been pointed out how the switch machine
relay SMR1 is moved to the left hand dotted posi
up, the relay Ab will be stuck up through its stick ‘
contact I82, and the back contacts I83 of relay tw (A
Ib and 584 of relay CRb, in multiple, and the re
lay Bb will be stuck up through its stick contact
I85 and the back'contact I85 of the stepping
relay I4.
With the relays Ab and Bb energized and the 40
relay Aa deenergized, the lower winding of the
tion of the relay Ba, but the relay Aa remained
stuck up through its stick circuit including its
contact 35 and the back contact 31 of the relay
CRa.‘ Also, picking up of the relay 5 as has just
happened, will open its back contact 9! and there
by break the stick circuit for the relay We to transfer relay is energized through the following
circuit-beginning at the terminal B+, back
effect deenergization of this relay We.
With the relay Wa deenergized the line circuit contact 42 of the relay Aa, wire I99, front con
39 is deenergized, thereby causing the line relays tact I9I of the relay Ab, wires I92 and I93, lower
LRa, LE1 and LE2 to assume their deenergized winding of the relay TR, to the terminaliB?g
pendent positions, and with the contacts 28 and The completion of this circuit operates the trans
22 of the relays L15’,a and LE1 assuming their fer relay TR back to its normal position, thereby
pendent position the relays Ia and I1 will assume connecting ‘the stepping wire 381° to the stepping
line 30. Movement of the transfer relay TR to
their deenergized positions. Dropping of the re
its right hand position also closes the following
lay I1 will effect dropping of the relay 51 by rea
circuit for the starting relay CRb:—-beginning at
son of opening of contact Illl of relay I1. Drop
ping of the relay l1a will, through the medium the terminal B-, contact 49 of the transfer re
of its, front contact 53 drop the relay 5, and lay TR, wire I95, front contact £96 of the relay
through the medium of its back contact 53 again ‘ Ab, wire I91, winding of the starting relay CR“,
picks up the starting relay CRa, the contact M wire E98, back contact I99 of the relay Ib, back to
terminal B+ of the same source. Picking up of
of the relay Aa still being closed, and the trans
fer relay TR still assuming its left hand dotted the starting relay CR‘) closes the pick-up circuit
for the control relay Wb through a circuit in
position.
,
Picking up of the relay CRBL again closes the cluding the front contact I84 of relay CRb and the
wires 290 and 2!“.
pick—up circuit for the relay WEL through its con
Picking up of the relay Wb applies current to
tact 31, and this relay Wa will then again apply
current of positive polarity to the stepping line the lower winding of the master relay F1, through
39, thereby causing the relays I and I1 again to the following circuit:-beginning at the terminal
be picked up in response to movement of line B+, front contact 203 of the relay Wb, wire 294,
relays LR& and LR1 toward the right, and also back contact 295 of the relay Ii, wire 29%, back
effecting picking up of the slow acting relays Ia contact 201 of the relay I2, wire 298, back con
and I1. Picking up of the relay Ia will of course tact 209 of the relay I3, wires 2H3, Eli, and 2I2,
again ‘close the stick circuit for the relay Wa at lower winding of relay F1. The application of
the front contact 3% of the relay Ia. The entire current to the lower winding F1 moves‘this relay
cycles of operation of the portion of the system F1 to its left hand position thereby sequentially
shown in Fig. 1A and the way station No. 1 will operating the relays F2 and F3 to their left hand
then be repeated. In this connection it should dotted position, and movement of the relay F3 to
be noted that during the time when the relay Ia its left hand position applies current of negative
has already been picked up and the relay CRa polarity to the stepping wire 39 through the fol
45
50
60
65
75
6
2,082,740
' lowing branch circuit:—beginning at the termi~
nal B—, contact 2l4 of the- relay F2 toward the
left, wire 2l5, contact 246' of the relay F3 to the
left, wire 2H, front contact 2L8 of the relay W",
5 wire 2|9, winding of the relay LR", wire 30*’, con
tact 48 of the transfer relay TR to the right, step
' ping line 30, line relay LR1 (see Fig. 2) , wire 36,
line relay LR2, wire 30, through the rest of the
line relays, to the common return wire C, con
EP: 10 nected to the mid-point of the central of?ce bat
tery. It is of course noted that during this ener
gization of the stepping line 36, the line relay
' LR”L is not included in the circuit whereas here
tofore the line relay LR,b was not included in
15 this circuit, so that the line relays LR", LRl, LR,2
will now be simultaneously operated to their left
hand position.
Operation of the line relay LE2 to its left hand
position closes the following pick-up circuit for
20 the relay ll2:——beginning atthe negative ter
minal of the battery 32, wires 220, 22! and 222,
contact 23 of the relay LR,2 to the left, wire 223,
back contact 224 of the relay I2, wire 225, lower
Similarly, referring to Fig. 2, the relays LR1,
I1, 11, 21, 31, 41 and 51 are wired up exactly the same
as are the relays LE2, I2, H2, I22, I32, I42 and I52,
respectively, except that the contact 2| of relay
LRl when in its right hand position is connected;
to the negative terminal of the battery 3!, where
as the corresponding contact 23 of the line relay
LE2 when assuming its right hand position is
connected to the positive terminal of the bat
tery 32, from which it is apparent that the bank. 10
of stepping relays shown at way station No. 1
will only operate if the ?rst impulse of the cycle
is of positive polarity, whereas the stepping relays
at the way station No. 2'will only operate if the
?rst step of the cycle of impulses is of negative
polarity.
From the foregoing itv is apparent that the
stepping relay I3 and the stepping relay l32 will
assume their attracted positions simultaneously
and during the time when these two stepping re
lays I3 and I 32 are up and their adjacent step
ping relays are down, and while the relay F2
assumes its right hand position and the relay F3
- winding of the relay H2, wires 226 and 227, back ' assumes its left hand position the following mes
25 contact 228 of the relay I22, wires 229 and 230,
back to the battery 32. The completion of the
30
>
‘
4
sage circuit, for operating the switch machine
for SMRP, is closedz-beginning at the terminal
circuit just traced picks up the relay H2, which ‘B—, contact 246 of the lever LSM2 assuming its
then in response to picking up of the relay I2 is left hand position, wire 24!, front contact 242 of
stuck up through the following stick circuit:— the relay l3, wire 243, back contact 244 of the
beginning at the negative terminal of the bat
tery 32, wires 220 and 232, from contact 233 of
the relay I2, wires 234 and 235, front stick con
tact 236 of the relay H2, resistance unit 231, up
relay 12, wire 245, back contact 246 of the re
lay “, wire 241, contact 248 of the relay 1:1"3 to
ward the left, wire 249, contact 256 of the relay
F2 to the right, wire 25I, front contact 252 of
"per winding of the relay H2, wires 238 and 221, the relay Ib, wire 253, message wire 20, wire 254
35 back contact 228 of the relay I22, wires 229 and (see Fig. 2), front contact 255 of the relay I2,
236, back to the battery 32.
'
wire 256, back contact 251 of the relay H2, wire
It may be pointed out here, that the resistance 258, back contact 259 of the relay I22, wire 266,
unit 231, which is included in a stick circuit just ‘ front contact 26! of the relay I32, wire 262, wind
traced, is used for the purpose of decreasing the ing of the switch machine relay SMRZ, wire 263,
“P40 current flowing in this stick circuitand conse
front contact 264 of the relay I32, wire 265, back
quently reduces the arcing at the contacts when contact 266 of the relay I 42, wire 261, back con
the relay I2 is again deenergized by breaking of tact 268 of the relay £52, wire 269, to common
this stick circuit. It is of course understood return wire C connected to the mid-point of the
that after a relay is once picked up it will stick central office battery.
1145 up on a much smaller current than is required
Completion of the circuit just traced operates
to pick such relay up.
the switch machine relay SMR2 to its left hand
Referring now to way station No. 1 it will be ‘ ‘dotted position, thereby operating the switch
noted that movement of the line relay LR.1 toward machine 8M2 to its take-siding position, allow
the left will after a short time effect energization
"'150 of the slow acting relay I1, but will not effect
energization of the stepping relay l1, because the
circuit closed through the lower winding of the
relay I1 does not include a source of energy, both
terminals of this lower winding of relay 11 ter
55 minating at the positive side of the battery 3|.
With the apparatus shown in Fig. 13 once ini
tiated it will run through two cycles of operation
in the same manner as will the apparatus shown
in Fig. 1A, and since the repeat features have
M 60 been described in connection with the apparatus
40
ing the east bound train to move o? of the siding
as soon as the dwarf signal E‘1 is cleared.
This dwarf signal Ed may be cleared by opera
tion of the signal relay SR2 to its right hand po
sition, the direction relay DR,2 already assuming
its east bound position, and this relay SR2 may
be operated to its right hand position by move
ment of the signal lever LS2 to its right hand po
sition, whereby during the simultaneous ener
gization of the stepping relays H and II2 causes
a momentary flow of current to the signal relay
SR2, through a message circuit readily traced in 60
the drawings. This ?ow of current operates this
relay SR2 to its right hand position, thereby
in Fig. 1A, it is deemed unnecessary to speci?cally
describe all the steps of this operation and to
trace all the various circuits involved. It may be clearing this dwarf starting signal Ed through
pointed out that the principal difference between a suitable circuit conventionally shown by the
65 the stepping apparatus shown in Fig. 1A and the dotted line 270, all in a manner as clearly dis
stepping apparatus shown in Fig. 1B is that ini
closed in the prior application of S. N. Wight,
tiation of the system shown in Fig. 1A causes the
gSer.
No. 321,185, ?led November 22, 1928.
relays E1, E2 and E3 to be moved to the right in
As the east bound train now proceeds into the
' response to energization- of the upper coil of
single track section in response to clearing the
70 relay E1, whereas the initiation of the system dwarf starting signal Ed it will tread upon the
shown in Fig. 1B causes the relays F1, F2 and F3 detector track circuit and effect deenergization 70
to be moved to the left in response to energi'z'ation of the track relay TRZ. Dropping of the track
of the lower winding of relay F1, in all other . relay TR2 effects momentary energization of the
respects relays in Fig. 1A are wired exactly the
relay QR2 through the following circuit:—-be
75 same as are the corresponding relays in Fig. 13,
ginning at the terminal B+ and back contact 2'“ 75
7
2,082,740
of the relay TRF, wire 212, front contact 213 of
the relay PR2, wires 214 and 215, winding of the
relay QRZ to the other terminal B-. It may
be mentioned here that if the system is at this
5 time in operation the relay QR.2 will be stuck
up through a stick circuit including the stick
contact 276 and the front contact 21'! of the re
lay 12. Also, upon picking up of its detector
track relay TRZ, or any other relay the position
10 of which is to be indicated in the central o?ice,
the relay QR.2 will be picked up through the back
contact 273 of the relay PR2, the relay PR2 being
slower acting than the relay QRZ. For a more
complete description of the relays PR2 and QR2
15 attention is directed to the prior application of
R. C. Leake and R. M. Phinney, above referred
to.
Picking up of the relay QR.2 closes the follow
ing circuit for the ?eld starting relay FA:—be
20 ginning at the positive terminal of the battery
230 (see Fig. 1A), winding of the ?eld starting
relay FA, wire 28I, back contact I30 of the relay
Ia, message wire 20, wire 254 (see Fig. 2), back
contact 255 of the relay I2, wire 282, front con
tact 283 of relay QRZ, to the common return wire
C connected to the negative terminal of the bat
tery 285,. Momentary energization of the relay
hand position in a manner presently described
in detail.
Brie?y stated, this transfer relay TR can only
be operated in a manner presently described if
one of the relays Ae~ or A13 is energized and the
other is deenergized, from which it is apparent
that if both of these relays A"L and Ab are simul
taneously energized the transfer relay TR can
only be operated through the medium of con
tacts I26 and I38 of relays 5 and I5, respectively, 10
so that the transfer relay will, with both of the
relays Aa and Ab energized select that half of
the dispatcher’s’ equipment previously selected
by the transfer relay TR depending upon the
position it then assumed, and that as soon as 15
a cycle is completed or one of the relays Aa or
Ab is deenergized the transfer relay TR will be
operated to the opposite position.
I have now pointed out how the system may
be initiated from the ?eld and how such initia
tion from the ?eld causes the apparatus in Fig.
1A to operate through one cycle of operation,
the apparatus shown in Fig. 13 to operate
through one cycle of operation, after which the
apparatus of Hg. 1A again operates through one 25
cycle followed by a cycle of operation of the ap
paratus shown in Fig. 1B, from which it is
FA, causes it to close its contacts 284 and 285,
apparent that during such operation, the relays
thereby closing pick-up circuits for the relays
3'9 A2‘, B1, Ab and Bb, readily traced in the drawings.
With these four relays simultaneously energized
the transfer relay TR will be left in the position
indicating relay IR.2 (see Fig. 1A) is operated
by current of negative polarity through the fol
it is then assuming, and if it is then assuming
I the left hand position it will initiate the appara
“0 tus shown in Fig. 1A, whereas if it assumes its
right hand position it will initiate the apparatus
shown in Fig. 1B, and in each case after the ap
paratus ?rst selected has been operated through
one cycle, all in a manner as heretofore de
40 scribed, the A relay of that apparatus will drop
at the end of the second cycle. Before the A re—
_ lay drops, and speci?cally when the last step
ping relay of that group picks up, the transfer
relay TR will be operated to its opposite position.
Let us now consider more speci?cally this op
eration of the transfer relay TR. Let us take
up the operation where we left it, that is, with
the relays A&, B‘, Ab and Bb all energized and
with the ?rst cycle completed. Just before this
cycle was completed, namely with the the step
ping relay 5 up, completion‘of the following cir
cuit operates the transfer‘relay TR to its right
hand position:—beginning at the terminal 13+,
front contact 44 of the relay Ab, wire I27, front
. contact I25 of the stepping relay 5, wires I28
and I 93, bottom coil of the relay TR, to the other
terminal 18-. With the relay TR assuming its
right hand position and the relay Ab assuming
its attracted position, the apparatus shown in
(ii) Fig. 1B is operated through one cycle of opera
I4 and I42 will be simultaneously assuming their
attracted positions and‘when this occurs the
lowing message circuit:— beginning at the nega
tive terminal of the battery 290 (see Fig. 2), back
contact 29I of the relay TR2, wire 292, front con
tact 293 of the relay I42, wire 294, back contact
25I of the relay ‘I32, wire 260, back contact 259
of the relay I22, wire 258, back contact 251 of
the relay H2, wire 256, front contact 255 of
the slow acting relay I2, wire 254, message wire
20, wire 253, front contact 252 of the relay 1'’,
wire 25I , contact 250 of the relay F2 to the right,
wire 249, contact 248 of the relay F3 ‘to the left,
wire 241, back contact 246 of the relay II, wire
245, back contact 244 of the relay I2, wire 243, 45
back contact 242 of the relay I3, wire 296, front
contact 29? of the relay I4, wire 29B, winding of
the relay 1R2, to thecommon return wire C con
nected through wires 269 (see Fig. 2), back con
tact 268 of relay I52, wire 251, front contact 255
of relay I42 and wire 299 to the mid-point of the
battery 29!]. The completion of this message
circuit will of course operate the indicating relay
IE2 to the left and illuminate the lamp L2, mani
festing to the operator that the train is leaving 55
the passing siding at the east end. The relays
QR1 and PR1 are provided for the same purpose
and function in the same way as do the relays
QR2 and PR2.
Summary operation-Considering the system
shown in Fig. 1B, the relay I5 assumes its en
at rest and with the relays all positioned as
shown, and assuming that the system is initiated
by moving either the lever LS1’ or the lever LSM1,
q UI transfer relay TR is again operated to its right
circuit for relay "We completed, relay CR.a dropped,
tion in a manner as already described.
When,
during this cycle of operation of the apparatus
60
the following relay operations will take place:
ergized position, the transfer relay TR is oper
relays Ba and At pick up, stick circuits for relays 65
(55 ated to its left hand position through the fol
Ba
and Aa completed, top coil for transfer relay
lowing circuit:-—beginning at the terminal B+,
TR energized operating TR to left, relay CR,a
front contact 42 of relay A‘*, wire I3'l, front con
tact I38 of the stepping relay I5, wires I39 and energized, relay Wa energized, top coils of relays
4?. With the transfer relay now assuming its E1, E2 and E3 energized operating these relays 70
70 left hand position and the relay Aa still up, the to the right, line relays LRa and LR1 operated
apparatus shown in Fig. 1A is again operated to the right, relays I and I1 picked up and stuck
through a cycle of operation, at the end of which I up and message circuit completed, top coil relay
the relay Aa is deenergized. With the relay Aa E1 opened and auxiliary circuit for top coil of
now deenergized and relay Ab still energized the relay E1 closed, relays Ia and I1 picked up, stick
1,8
2,082,740
' bottom circuit for relay E1 closed and auxiliary
circuit for top coil of relay E11 opened, operates
' relays E1, E2, E3 to the left, line relays LRa and
LRl operated toward the left, relays 2 and 21'
picked up, relays l and l1 dropped, second mes
sage circuit completed, both auxiliary circuits
for relay E1 opened and main circuit for top coil
.of relay E1 closed, line relays LR?v and LE1 oper
ateol to the right, relays 3 and 31 picked up,
10 relays 2 and 21 dropped and third message cir
cuit completed, main circuit for upper coil of
' relays El‘ opened and main circuit for lower coil
"of relay E1 closed, relays E1, E2 and E3 operate
to left, line relays LRa and LR1 operate to left,
relays it and d1 picked up, relay Ba dropped, re
lays 3 and 31 dropped and fourth message cir
' cuit completed, main circuit for bottom coil re
lay El opened and main circuit for top coil of
relay E1 closed, relays E1, E2, E3, LRa and LR,1
operate to right, relays 5 and 51 picked up, relays
. it and d1 dropped and ?fth message circuit com
pleted, relay Wa dropped opening the stepping
circuit, relays LRa and LE1 deenergized, relays
‘ Ia and I1 dropped, relay CR.a picked up, relay Wa
[0 Di picked up, after which the same cycle of oper
ation is repeated. It may be pointed out here
that the devices are not necessarily operated in
t the exact order above given in that some of these
operations occur in multiple, so to speak, so that
30 the exact order in which these operations take
place depends somewhat on the operating char
acteristics of the relays involved. This summary
of relay operations has for convenience been lim
ited to the positive starting portion of the sys
tem, and has been given to aid a person in the
study of the system disclosed in the drawings.
Although applicant has illustrated one rather
speci?c embodiment of his invention, this is not
to be construed as a limitation upon the scope
of his invention, nor is the system shown to be
‘construed as the exact construction preferably
employed in practicing the invention, but should
be considered as an exempli?cation of a system
' having certain desirable operating characteristics
H1 on underlying the present invention; for instance,
suitable interlocking neutral relays could be
used instead of the polar relays E1, E2 and E3, and
other suitable control relays may be used instead
of the relays. SR1, DRl, SMR1, etc., and many
other changes, modi?cations and additions may
be made to adapt the invention to the particular
problem encountered in practicing the same,
‘ without departing from the spirit or scope of the
invention, except as demanded by the scope of
the following claims.
What I claim as new is:—
I 1. In aremote control system of the synchro
nous selector type, the combination with two sep
arate series of stepping relays in a central oi?ce
and a series of stepping relays at each of a plu
rality of way stations, means whereby one of
vsaid two series of stepping relays operates to ap
ply a series of stepping impulses to a stepping line
connecting said o?ice and way stations the ?rst
H of which is positive, means whereby the other of
"said two series of step-ping relays operates to ap
ply a series of stepping impulses to said stepping
line thev ?rst of which is of negative polarity,
means whereby some of said way station series
of stepping relays respond only when the ?rst
impulse of a series of impulses is positive, means
whereby other series of way station relays re
spond only when the ?rst impulse of a series is
of negative polarity, and means for transmitting
distinctive signals when certain and correspond
ing stepping relays assume their energized posi
tion.
2. In a remote control system of the synchro
nous selector type, the combination with two sep
arate series of stepping relays in a central of?ce
and a series of stepping relays at each of a plu
rality of way stations, means whereby one of said
two series of stepping relays operates to apply a
series of stepping impulses to a stepping line the
?rst impulse of which is positive, means whereby 10
the other of said two series of stepping relays
operates to apply a series of stepping impulses
‘to said stepping line the ?rst of which is of nega
tive polarity, means whereby some of said way
station series of stepping relays respond only
when the ?rst impulse of a series of impulses is
positive, means whereby other series of way sta
tion relays respond only when the ?rst impulse
of a series is of negative polarity, and means com
pleting a plurality of message circuits sequen
tially each including the same line wire during a
particular cycle of operation.
3. In a remote control system of the syn
chronous selector type, the combination with two
separate series of stepping relays in a central
o?ice and a series of stepping relays at each of
a plurality of way stations, means whereby one
of said two series of stepping relays operates to
apply a series of stepping impulses to a stepping ,
line the ?rst of which is positive, means whereby
the other of said two series of stepping relays
operates to apply a series of stepping impulses
to said stepping line the ?rst of which is of nega
tive polarity, means whereby some of said way
station series of stepping relays respond only
when the ?rst impulse is positive, means whereby
other series of way station relays respond only
when the ?rst impulse of a series is of negative
polarity, and means completing a plurality of
message circuits sequentially each including the 40
same line wire during each of the two distinctive
cycles of operation obtainable by said two sepa
rate series of stepping relays.
4. In combination, a line circuit having two
polar line relays therein, a series of stepping re
lays controlled by each of said line relays, a slow
acting relay associated with each of said line
relays each assuming its energized position if the
associated line relay assumes either of its polar
positions either intermittently or permanently, 50
a ?rst stepping relay of one of said series of step
ping relays having an energizing circuit includ
ing a back contact of said associated slow acting
relay and a contact closed if said associated line
relay assumes its positive position, a ?rst step 55
ping relay of the other series of stepping relays
having an energizing circuit including a back
contact of said associated slow acting relay and
a contact closed when its associated line relay
assumes its negative position, whereby the ?rst
relay of one series of stepping relays is picked up
only if the ?rst impulse of a cycle is of positive
polarity and the ?rst relay of the other series
is picked up only if the ?rst impulse of a cycle
is of negative polarity, and means responsive to 65
the operation of each of said ?rst stepping relays
for selecting the next stepping relay of its series.
5. In combination, a line circuit having two
polar line relays therein, a series of stepping re
lays associated with each of said line relays, a 70
slow acting relay associated with each of said
line relays each assuming its energized position
if the associated line relay assumes either of its
polar positions either intermittently or‘ perma
nently, a first stepping relay of one of said se- 75
2,082,740
cuit including a back contact of said associated
that in the event two relays are up at the same
time no message circuit can be completed.
slow acting relay and a contact closed if said
associated line relay assumes its positive posi
9. In a remote-control system of the syn
chronous selector type; a plurality of stations;
ries of stepping‘ relays having an energizing cir
tion, a ?rst stepping ‘ relay of the other se
ries of stepping relays having an energizing cir
cuit including a back contact of said associated
slow acting relay and a contact closed when its
associated line relay assumes its negative posi
10 tion whereby the ?rst relay of one series of step
ping relays is picked up only if the ?rst impulse
of a cycle‘is of positive polarity and the ?rst
relay of ‘the other series is picked up only if the
?rst impulse of - a cycle is of negative polarity,
15 and means for transmitting distinctive signals as
selected by additional stepping relays of a series
in accordance ‘with’ whether the ?rst relay of
one series or the ?rst relay of the other series of
stepping relays is energized,
20
‘~
‘ , ‘
6. In combination, a line circuit having two
polar line relays therein, a series of. stepping re
lays associatedwith each of ‘said line relays, a
slow acting relay associated with each of said
line relays eachassuming its energized position
if the‘associated line relay- assumes either of its
polar positions either intermittently or perma
nently, a ?rst steppingrelay of one of said series
ofstepping‘relays having an energizing circuit
including a back contact of said associated slow
acting relay and a contact closed if said asso
ciated line relay assumes its positive position,
a ?rst stepping relay of the other series of step
ping relays having an energizing circuit includ
ing a back contact of said associated slow act
ing relay and a contact closed when its asso
ciated line relay assumes its negative position
whereby the ?rst relay of one series of stepping
relays is picked up only‘ if the ?rst impulse of a
cycle impressed on said line circuit is of posi
40 tive polarity and the ?rst relay of the other
series is picked up only if the ?rst impulse of a
cycle is of negative polarity,-means for trans
mitting distinctive signals as selected by addi
tional stepping relays of a series in accordance
45 with whether the‘?rst relay of one series or‘ the
?rst relay of the other series of stepping relays
is energized, and a circuit vfor picking up the
second relay of a series including a front contact
of said slow acting relay and a front contact of
a
50 the ?rst relay of the same series. ;
, '7. In combination, one set of line wires, two
sets of sending apparatus ‘for transmitting dis
tinctive signals over said one set of line wires, a
55
a stepping circuit connecting said plurality of ,
stations; means applying a series of impulses to
said stepping circuit; means determining the
character‘ of the ?rst impulse of said series of
impulses; a‘ series of stepping relays located at
each station, certain of said series of stepping 10
relays being responsive to said series of impulses
only when the ?rst impulse is of one character,
and certain other vof said series of stepping re
lays being responsive to said series of impulses
only when the ?rst impulse is of another char 15
acter; and means for transmitting distinctive
signals only When certain and corresponding re
lays respond to said series of impulses.
10. In a remote control system of the syn
chronous selector type; a plurality of stations;
a stepping circuit ‘connecting said plurality of
stations; means applying a series of impulses to
said stepping circuit; means determining the
character of the ?rst impulse of said series
of impulses; a series of stepping relays lo-l
catedat‘ each station, certain of said series
ofstepping ‘relays being responsive to said se
ries‘ofyimpulses only when the ?rst impulse is
of one character, and certain other of said se
ries of stepping relays being responsive to said 3O
series of impulses only when the ?rst impulse is
of another character; and means completing a
plurality of message circuits, each of said mes
sage circuits being ‘completed only when certain
and corresponding stepping relays respond to
corresponding impulses of said series of impulses. ‘
l 11. In combination; one ‘set of line wires; two
sets of ‘ sending apparatus each being operable
through cycles of operation for transmitting dis
tinctivesignals over said one set of line wires; 40
a two-position polar relay for e?ecting use of
said set of line wires during an operating cycle
by one or the other of said two sets of sending
apparatus; two initiating relays, one for each
set of sending apparatus for starting its corre
sponding set of apparatus whensaid two-posi
tion polar relay is in a corresponding position
and that initiating relay is energized; means
for operating said polar relay to a position into
correspondence with a particular initiating relay
50
when that initiating relay, is energized and the
other initiating relayis deenergized; and means
for operating said’polar relay to alternate posi
two-position polar relay’ for eifecting use of said tions ‘ for "successive cycles of operation when
set of line wires by one or the ‘other of said' both of said initiating relays are energized.
sets of sending‘ apparatus, an initiating relay for
each set of sending apparatus, and means‘for
operatingsaidpolar relay to one position when
one of said initiating relays is energized and the
other initiating relay is .de-energized'and for op
60 erating said polar relay. to its opposite position
when said other initiating relay is energized and
said ?rst initiating relay is 'deenergized.
8. In a synchronous selector centralized traf~
65 ?c controlling system of the message wire type
12. ,In combination, a‘series of stepping relays, '
means for successively energizing‘and successively
deenergizing said relays so that only one stepping
relay can remain energized at any one time, a
message wire, a common return wire, and con
tacts, on each of said stepping relays for com
pleting a plurality of message circuits between
said message wire and said common wire, each
of said message circuits including a front contact
of the, stepping‘relay energized for that step
comprising, a series of stepping relays, means
and a back contact of every other stepping relay
for successively picking-up said relaysone at a
of the series.
time, a message wire and a‘common return wire,
contacts on said stepping relays for successively
70 completing distinct message circuits one at a
time and one for each stepping relay and ‘each
including said message wire and ‘said common
wire, and each of said message circuits includ
ing a contact of each of said stepping relays
75 which contacts are so associated with said relays
‘
i
13. In a remote control system, a stepping
line circuit, a plurality of polarized line relays
included in said line. circuit, a stepping relay
bank associated with each of said line relays,
means placing a plurality of series of distinctive
impulses upon said line circuit, means determin
ing the character of the ?rst impulse of each
series, and means causing only certain of said
60
1O
2,082,740
plurality of stepping relay banks to respond to
sponding polar line relay only during the pick
any particular one of said series of distinctive
up period of its corresponding neutral relay,
whereby said stations may be remotely selected
impulses depending upon the character of the
?rst impulse of such series.
Ui
'14. In a remote control system, a stepping line
circuit, means placing a plurality of series of
impulses on said stepping line circuit, means
determining the character of the impulses of
each series, a plurality of stepping relay banks,
a line relay for each stepping relay bank for
responding to the impulses of any series, means
causing certain ‘of said plurality of stepping relay
banks to be responsive to their respective line
relays only when the ?rst impulse of a series is
of one character, and means causing certain
others of said plurality of stepping relay banks
to be responsive to their respective line relays
only when the ?rst impulse of a series is of
another character.
'
15. In combination, a line circuit having a
plurality of polar line relays included therein,
means for impressing a plurality of impulses of
selected polarities on said line circuit, means
responsive to said impulses for operating said
25 line relays, a neutral relay for each polar line
relay, each of said neutral relays having an en
ergizing circuit closed when its, corresponding
polar line relay assumes either of its polar posi
tions, a stepping relay bank associated with each
of said polar line relays, a pick-up circuit for
over said line circuit, and selector means respon
sive to the operation of the line relay only at a
selected station.
18. In combination, a line circuit interconnect
ing a plurality of stations, a polar line relay in
cluded in said line circuit at each of said stations,
means for impressing a plurality of impulses of Bio
selected polarities on said line circuit, means re
sponsive to said impulses for operating said'line
relays, a neutral relay at each station having an
energizing ‘circuit closed when its corresponding
polar line relay assumes either of its polar posil
tions, station selecting means at each station
selectively controlled in accordance with the polar
position of its corresponding polar line relay dur
ing the time that said corresponding polar line
relay assumes a polar position and said corre
sponding neutral relay has not yet responded,
whereby said stations are selected in accordance
with the polarity of impulses applied ‘to said line
circuit, and selector means responsive to the op
eration of the line relay only at a selected station. '
19. In combination, a line circuit interconnect
ing a plurality of stations, a polar line relay in
cluded in said line circuit at each of' said stations,
means for impressing a plurality of impulses of
selected polarities ‘on said line circuit, means re- "
the ?rst relay in each of certain of said stepping
sponsive to said impulses for’operating said line
relay banks, said circuits being energized only
relays, a neutral relay at each station having an
energizing circuit closed when its corresponding
during the pick-up period of said-neutral relay
when their corresponding polar relays assume
35 certain polar positions, .a pick-up circuit for the
?rst relay in each of certain other of said step
ping relay banks, said circuits being energized
only during the pick-up period of said neutral
relays when their corresponding polar relays gas
polar line relay assumes either of its polar posi
tions, other relay means at each station having
an energizing circuit including a back contact of
its corresponding neutral relay and a polar con
tact of its corresponding polar relay in one or
the ‘other of its polar positions as previously de~
40 sume certain other polar positions, and means
termined, whereby said stations are selectively ‘
responsive to the operation of said polar relays
following the operation of said neutral relays
and said ?rst stepping relays for operating the
other stepping relays, in the associated banks.
45, 16. In combination, .a line circuit interconnect
ing :a plurality of stations, a polar line relay
divided into groups in accordance with the polar
ity of an impulse applied to said line circuit, and
selector means responsive to the operation of the
line relay only at a selected station.
included in said line circuit atleach of said sta
tions, means for impressing a plurality of im
pulses of selected polarities on said line circuit,
to said line circuit, a pair of polar line relays
‘20. In combination, a line circuit, means for -
selectively applying positive or negative energy
each having contacts capable of assuming either
of two positions in accordance with the polarity
50 means responsive to said impulses for operating
of the energy applied to said line circuit, a pair !
said line relays, a neutral relay at each station
having an energizing circuit closed when .its cor
responding polar line relay assumes either of
its polar positions, other relay means at each
55 station selectively controlled in accordance with
of neutral relays energizing circuits closed for
each of, said neutral relays when the contacts of
said polar relays assume either of their positions,
relay means selectively controlled in accordance
with the positions assumed by the contacts of .5,’
said polar relays during the pick-up period of
said neutral relays and selector means selectively
controlled by said relay means to be responsive to
the further operation of said line relays after said
thepolar position of its corresponding polar line
relay only during the pick-up period of its cor
responding neutral relay, whereby said stations
are selectively divided 'into groups in accordance
60 with a polar impulse applied to said line circuit,
and selector means responsive to the further
operation of the line relay only at a station se
lected by said polar impulse.
,
17. In combination, a line circuit interconnect
65 ing a control office and a plurality of stations, a
polar line relay included in said linecircuit at
each of said stations, means for impressing 'a
plurality of impulses of selected polarities on said
line circuit, means responsive to said impulses
for operating said line relays, a neutral relay at
each station having an energizing circuit closed
when its corresponding polar line relay assumes
either of its polar positions, station selecting
means at each station selectively controlled in
75 accordance with the polar position of its corre
neutral relays are picked up.
'
21._In combination, a line circuit, means for
selectively applying positive or negative potential
to said line circuit, a plurality of polar line relays
included in said line circuit each of said polar
relays having contacts operable to either of two
polar positions, a neutral relay for each of said
line relays, an energizing circuit for each of said
neutral relays closed whenever the contacts of
its respective polar relay assume polar positions,
and selector means for each of said polar line
relays, certain of said selector means responding
to their polar relays only when their contacts
assume one polar position during the pick-up
period of their neutral relays and certain other of
said selector means responding to their polar re
1.1
2,082,740
lays only when their contacts assume the other
polar position during the pick-up periods of their
neutral relays, whereby said selector means may
be selectively controlled in accordance with‘the
polarity of the potential placed on said line
circuit.
"
I
22. In a remote control system, a line circuit,
means for energizing said line ‘circuit with‘a plu
rality of different series of impulses having dis
10 tinctive characters, a plurality of line relays for
repeating the impulses of each series, a plurality
of selector means, one for each of said line relays,
means causing certain of said selector means to
be ‘responsive to its respective line relay during
15 a particular one of ‘ said series of impulses only if
the ?rst impulse of that series is of a particular
distinctive character, means causing certain other
of said selector means to be responsive to its
respective line relay during a particular one of
20 said series of impulses only if the ?rst impulse
of that series is of another particular distinctive
controllable
means.
'
'
‘
r
26. In a communication system'for centralized
tra?ic control, a stepping line circuit extending
from a control o?ice to‘ a ?eld station, a line re
lay in said line circuit at the ?eld station, a plu
rality of stepping relays atv the ‘?eld station, cir
cuits controlled by said line relay‘ for energizing
said stepping relays sequentially one at a time,
means at the station responsive to the polarity
of energization‘of said‘line circuit at a particular
time for determining whether or not said stepping
relays shalllbe operated by subsequent impulses
on said stepping circuit, manually controllable 15
means in said control o?ice for determining the
polarity of said energization ‘of the line circuit
to cause operation of said stepping relays de
pending upon the condition of said manually con
trollable means, and control relays at the ?eld 20
station for governing the operation of traffic con
character, and means for preventing any re
sponse of said selector means to a series of im
trolling devices and having circuits selectively
controlled by said stepping relays.
pulses when the ?rst impulse of the series is not
of said particular character.
nous selector type; a stepping circuit; means ap
23. In a remote control system, a line circuit,
code transmitting means for energizing said line
circuit with any one of a plurality of different se
ries of code combinations of impulses of selected
30 characters, a plurality of step-by-step means each
operated through a cycle of operation in response
to a series of impulses only when the ?rst ele
ment of the series is of a particular character,
electro-responsive means responsive to succeed
ing code elements of said series only when said
‘ step-by-step means operates through a cycle of
operation, and means preventing any operation
of said step-by-step ‘means by succeeding im
pulses of a series when the ?rst element of said
40 series is not of said particular character.
24. In a communication system for centralized
tra?ic control, a control of?ce, switch control
devices and signal control devices located at a
plurality of ?eld stations, a line circuit for con
necting the control of?ce to the several ?eld sta
45
tions, a series of stepping relays at each ?eld sta
tion, a line relay in said line circuit for energizing
said stepping relays sequentially, a. station con
ditioning relay at each ?eld station responsive to
the polarity of energization of said line circuit for
50
determining whether or not said bank of stepping
relays shall be operated by subsequent operations
of said line relay, a manually operable means for
each station, means controlled by said manually
operable means for determining the polarity of
energization of said line circuit at a predeter
mined time to cause energization of said station
conditioning relay and operation of the bank of
stepping relays at that particular station, and
60 control circuits for said switch and signal control
devices governed by said stepping relays.
25. In a communication system for centralized
tra?ic control, a stepping line circuit extending
from a control of?ce to a ?eld station, a line re
65 lay in said line circuit at the ?eld station, a plu
rality of stepping relays at the ?eld station, cir
cuits controlled by said line relay for energizing
said stepping relays sequentially one at a time,
means at the station responsive to the polarity
oflenergization of said line circuit at a particular
time for determining whether or not said stepping
relays shall be operated by subsequent impulses
on said stepping circuit, and manually control
labile means in said control o?lce for determining
75
cult to cause operation of said stepping relays
depending upon the condition of said manually
the polarity of said energization of the line cir
27. In a remote control system of the synchro
25
plying a series of impulses to said stepping cir
cuit; means selectively determining the charac
ter of each impulse of said series of impulses; a
line relay in said stepping circuit distinctively re
sponsive to each impulse of said series of impulses 30
in accordance with the character thereof; a slow
acting relay controlled by a, distinctive operation
of said line relay, said slow-acting relay being
picked up at the beginning of said series of said
impulse and dropped at the end of said series of 35
impulses; and a stepping relay bank initially con
trolled by the response of said line relay to an
impulse of a distinctive character and said slow
acting ‘relay in its de-energized position, said
stepping relay bank being selectively responsive
40
to the distinctive operation of said line relay by a
particular impulse of said series whereby said
bank thereafter responds or fails to respond to
all other operations of said line relay by said
series of impulses.
45
28. In a remote control system of the synchro
nous selector type; a stepping circuit; means ap
plying a series of impulses to said stepping cir
cuit; means selectively determining the character
of the ?rst impulse of said series of impulses; a ,
line relay in said stepping circuit distinctively re
sponsive to each impulse of said series of im
pulses in accordance with the character thereof;
a slow-acting relay controlled by said line relay,
said slow-acting relay being picked up at the be
ginning of said series of impulses and dropped
out at the end of said series of impulses; and a
stepping relay bank initially controlled by the
response of said line relay to the ?rst impulse of
a distinctive character and said slow-acting relay 60
in its de-energized position, said stepping relay
bank being selectively responsive to the distinctive
operation of said line relay by the ?rst impulse of
said series whereby said bank thereafter responds
or fails to respond to all other operations of said
line relay‘by said series of impulses.
29. In combination with a control relay, a se
lector of the relay type adapted to be operated by
said control relay and comprising a series of
counting relays interconnected to permit succes
sive energization of the relays; a pick-up circuit
for each said counting relay including a contact
of the control relay, a front contact of the next
preceding counting relay and a back contact of
the second preceding counting relay; and means 75
12
2,082,740
e?ective when each counting relay becomes ener
gized and including a back contact» of such ener
gized relay for releasing the next preceding relay.
30. In combination with a control relay, ‘a se
lector of the relay type adapted to be operated by
said control relay and comprising a plurality of
counting relays arranged vin order; a pick-up cir
cuit for each odd-numbered ‘counting relay in
cluding a front contact of the next preceding
1 (l counting relay, a'back contact of the second pre
ceding counting relay and a contact of said con
trol relay closed in oneposition; a pick-up cir
cuit for each even-numbered counting relay in
cluding a front contact of the next preceding
counting relay, a back contact of the second pre
ceding counting relay and a contact of :said con
trol relay closed in another position; and a stick
circuit for ‘each counting relay including a back
contact of the .next succeeding counting relay.
31. A selector of the counting relay type com
prising a series of counting relays interconnected
to permit successive energization of the relays, a
>pick~up- circuit for each said relay including a
front :contact of the next preceding counting re
lay and a back contact of the second preceding
counting relay, and a holdinglcircuit for each said
counting relay including its own front contact and
a back contact of the next succeeding counting
relay, a control relay‘governed from a distant .
point and provided with contacts which are al—
‘ternately closed, one contact of saidlcontrol relay
being included in the pick-up circuit for each
odd-numbered counting-relay, and another con
tact of said-control relay'being included in the
pick-up circuit for each even-numbered counting
relay. .
ROBERT M. PHINNEY.
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