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Патент USA US2121163

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~June 21, 1938.
2,121,163
H. c. ROBINSON
START-STOP DISTRIBUTOR SYSTEM
2 Sheets-Sheet 1
Original Filed July l0, 1933
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ATTY.
June 21, 1938.
2,121,163
H. c. ROBINSON
START-STOP DISTRIBUTOR SYSTEM
Original Filed July l0, 1935
2 Sheets-Sheet 2
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Patented .lune 21, 1938
2,121,163 vif
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2,121,1631
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» START-sro? mscmmu'roa SYSTEM
‘
` :Harold
Associated
C. Robinson,
Electric Laboratories,
ïuChicago, lll.,vInc.,
_assignerl
Chicago,
lll., a corporation of Delaware
`
,` ` ’
Application July 1o, 193s, `serial No. 61.9.6152 A
_
- Renewed August 24, 1934
, The present invention relates in general to
start-stop distributor systems.
The main object of the present invention is
the provision of an improved start-stop distribu
5 tor system for the transmission and receipt of
nets or relays MI to M0, inclusive, for control
ling the operation ot the recorder. A turn key
K is provided for controlling the operation of
the relay which disconnects the receiving seg- `
ments from the recording relays and connects l
the receiving segments to an error-checking vre
llay when the recorder or lamp indicator is not
provide a one-wire distributor, transmission, and ' used. The transmitting and receiving circuit
check-back system which transmits and checks between the transmitting distributor in Fig. 1
10 such transmission at each .revolution of the and the receiving distributor in Fig. 2 comprises 1o
the well-known duplex circuit arrangement in
which the diiïerential relays 8€ and IUI respond
A feature of the invention relates to the trans
to incoming pulses over the conductor |00 while
mitting and receiving circuit arrangement where
the pulsing relays 'I8 and IM transmit such pulses
by the transmitting distributor at each revolu
_coded information.
Another object of the present invention is to
distributor.
‘
.
15 tion thereof both transmits a code to the receiv
ing distributor and receives the same code trans
mitted back by the receiving distributor to check
the accuracy of the transmission and the receipt
of the code.
20
A further feature relates to the novel means
for indicating the correct transmission and re
ceipt of codes.
f
These and other features will be more readily
understood from a consideration of the follow
25 ing'v specification taken in connection with the
Vaccompanying drawings, in which:
,
Fig.` 1 shows the apparatus and circuit equip
-under control of the distributors.
t
15
Fig'. 1a diagrammatically illustrates the man-`
ner in which the push keys are locked when
operated and unlocked near the end of each rev
olution of the transmitting distributor by the
operation of magnet 66.
20
Fig. 2 shows the receiving distributor in the
remote office and is of the well-known rotary
start-stop type. The receiving segments RI to
R6, inclusive, are connected to the recording re
lays RRI.
The recording` relays `Riti control 25 ‘
circuits for grounding the send-back segments
SBI to SBS inclusive, andalso control circuits
ment at a transmitting oiiice, while Fig. 2 shows for operating the recorder shown at the lower ,
the apparatusand circuit equipment at the re 1 left-hand corner of Fig. 2. \ This recorder may
be any well-known printer,` recorder or punch..30
30 mote receiving office.
`
or both, and comprises ten magnets Vor relays
Referring now to Fig. 1 in detail, the trans
mitting distributor apparatus comprises the well
known type of start-stop rotary distributor hav
ing a starte-stop `magnet I9, a start segment,
TI to Til, inclusive, for controlling its operation.
To the right and center of the drawing is shown .
a group of relays which are used when thistype
35 transmitting segments T, TI to T6, inclusive,
receiving segments R, RI to R6. inclusive, check
of system is used‘for remote control of switch- 35
ing apparatus wherein the recording relays RRI
ing segments C, CI to C6, inclusive, and co
operating brushes TS, EC, and RS. 'I'he key
unlocking segments 16 and r1'l are alsoprovided
40 for co-operation with -the brush TS. The digit
keys KI tol K0, inclusive, are connected‘to the
start conductor IB and to the transmitting seg
instead of controlling a recorder will control the Y
desired switching apparatus. In the >lower right
hand corner of the drawing are shown the trans
fer relays `which disconnect the remoteycontrol 40
relay group to permit speedier or continuous
operation of the distributors. The code used in
ments TI to T6, inclusive, by way of conductors ' this system is shown in the lower right-hand
I tot, inclusive. A Wipe-out key,l WOK and a
45 transfer keys‘TK are‘also `provided to cause the
transmitting distributor to transmit the wipe-out
. corner of Fig. .2.
` The two distributorsare arranged to operate 45
in synchronism. The motor of the transmitting ’
distributor in Fig.`1 comprises a motor governed
to rotate at apredetermined speed while the
mally connected to the receiving segments RI -motor iîor` operating the brushes ofthe receiving
distributor in Fig. 2 comprises a synchronous v5()
50 to R6, inclusive, and control circuits for operat
ing the lamp indicator or a recorder. The-lamp motor which operates at a predetermined speed,
Having briefly described the apparatus a de
indicator is illustrated'by one of the lamps, such
and transfer codes.
,
`
`
. A set of recording ,relays RR are shown nor-.
as L2, and the recorder may be a recording ‘ tailed description oi' the circuit operation will
printer of any well-known make or a recording now be given. _ The operator therefore operates
the digit keys shown in Fig. 1 in accordance with 55"
55 punch or both. ’I'he recorder comprises ten mag
2,121,161;
the message or digits to be transmitted to the
simultaneously started. The circuit to the start
. stop magnet Ill is either interrupted by the de
Assuming that the key KI is the first key energization of relay III or when the brush R8
remote omce.
'
operated by the operator, then when such key is
pushed down the same is locked by the plate Il
in the manner illustrated in Fig. la. It will be
noted that each ofthe keys KI to KI, inclusive,
has one spring of each pair therein grounded.
In response to the operation of key KI the outer
10 left-hand pair of springs connects ground to
start conductor I8, the 'center pair connects
ground to conductor I,4 and the right-hand pair
connects ground to conductor 4. 'I‘he transmit
ting segments TI and T4 are therefore grounded
15 by the operation of key KI.~ Responsive to the
grounding of the start conductor Il the start
leaves the start segment.
'
Returning now to the transmitting distributor
and at a time when the transmitting brush TS
encounters the grounded transmitting segment
_TI, ,a circuit may be traced for operating the
pulse relay 1I as follows: Afrom ground by way
of the center springs of key KI, conductor I, 10
transmitting segment TI, brush TS, transmitting
segment T, and thence over the previously traced
circuit through the winding of pulse relay 'Il to
stop magnet Il is energized by way of amature
battery. 'I‘he pulse relay ‘Il is maintained ener
gized over this circuit as long as the transmitting
brush TS encounters a grounded transmitting
segment. The operation of the pulse relay 'I8
22 to release the brushes TS, EC, and RC.- The
grounding of start conductor Il also closes a cir
transmits a pulse over the conductor |00 for`
operating the relay III in the same manner as
cuit for energizing the pulse relay 1I as follows:
from grounded start conductor I8, armature 22,
start segment, brush TS, transmitting segment T,
resting contact of amature i. and said arma
ture, and through the'winding of relay 1l' and
resistance to battery. The slow-to-operate relay
2l is also energized by way of the grounded start
conductor Il and operates a predetermined time
after both the start-stop magnet Il and the pulse
relay 1I are energized. Relay 2l at armature 22
opens the original energizing circuit of the
start-stop magnet Il and pulse relay ‘Il shortly
after the brushes of the distributor have started
on their revolution. Pulse relay `1l, upon ener
gizing, at armature ‘Il and its working contact,
completes a circuit for energizing the duplex
diiferential relay IDI in Fig. 2 over the following
circuit: from ground by way of the resting contact
of armature IIB and said armature, through the
upper winding of differential duplex relay IUI,
conductor IMI, through the upper winding of
differential duplex relay "_, and by way of arma
ture 'Ii and its working contact through the re
lsistance to battery. Duplex relay It does not
energize at this time because a balancing circuit
is closed through its lower winding and since the
windings are equal and oppose 'each other the
relay I( will not energize at this time. The differ
_ ential duplex relay III in Fig. 2 has an energiz
ing circuit completed through its upper winding
while its lower winding is short circuited from
ground at armature I0! with the result that only
the upper winding is excited and therefore thek
relay will energize and operate its armature. The
energizing circuit to relay 18 is terminated either
55 by the operation of armature 22' as previously
described or in response to the transmitting brush
TS leaving the start segment at the start of its
revolution. _The deenergization`of pulse relay 18
terminates the pulse over the conductor Ill with
the result that the duplex relay IIII also deener
gizes. This pulse thus transmitted from the
transmitting distributor to the receiving distribu
tor in Fig. 2 is the start pulse and therefore the
energization of relay |l|` at armature IIII com
pletes a circuit for energizing the start-stop mag
net Il! as follows: from ground by way of arma
ture Ill, springs IIII controlled by the dash-pot
relay Ill, receiving segment R, receiving brush
' RS, start segment, and through the winding of
70 the start-stop magnet I II to battery. 'I‘he start
stop magnet |06 is energized over this circuit and
releases the brushes RS and‘SB of the receiving
distributor in the well-known manner. The
brushes of the transmitting distributor and the
75 receiving distributor are therefore practically
previously described. Shortly after the brush TS 20
encounters the grounded transmitting segment TI
the brush RS in the receiving distributor will
engage the first receiving segment RI and since
relay IUI is energized at this time a circuit may
now be traced for energizing the recording relay 25
I|0 as follows: from ground by way of amature
|03, springs I Il, receiving segment R, receiving
brush RS, receiving segment RI, and through the
upper winding of recording relay IIB to battery.
Relay IIO, upon energizing, at armature II2 com 30
pletes a locking circuit through its lower winding
as follows: from grounded armature I'II, nor
mally closed contacts controlled by armature |86,
through the resistance at armature I I2 and lower
winding of relay IIII to battery. At armature II3 35
relay III| prepares a point in the chain circuit for
operating,relay |12; at armatures Ill, IIS, and
IIS prepares circuits for operating the magnets
of the recorder or switching devices; and at arma
ture III grounds the send-back segment SBI. 40
When the transmitting brush TS leaves the seg
ment TI, pulse relay ‘Il deenergizes to terminate
the pulse to relay IOI. 'I‘he circuit for initially
energizing relay III is opened in response to the
brush RS rotating past the segment RI.
45
When the sending brush SB engages the send
back segment SBI, a circuit may be traced for
energizing the pulse relay I“ as follows: from
grounded armature III. send-back segment
SBI, brush SB, segment S, and through the 50
winding of pulse relay IM and resistance to
‘ battery.
Pulse relay IM, upon energizing, at
armature
|05 disconnects ground from the
winding of relay IBI and connects- negative bat
tery through a resistance and through both rthe 55
windings of relay Ill. Relay IIII will notener
gize at this time because the two windings are
equal and oppose each other. However, a cir
cuit may be traced from the upper winding of
this relay over conductor |00 and through the
upper winding of differential relay 86 to ground
at armature 1l. Relay ß alone is energized
over this circuit and at amature 88 connects
gre-und to receiving segment R. The differential
relay l! energizes over the above-traced circuit
because the lower winding is short circuited by
ground at armature 1l. When the receiving
brush vRS in the transmitting distributor en
gages the receiving Segment RI, which it does
shortly after the send-back brush of the receiv 70
ing distributor engages the send-back segment
SBI, a circuit may be traced for operating the
recording relay 30 as follows: from ground by
way of armature ll, segment R., brush RS, seg
ment RI, amature Il and its resting contact,
3
amines
and through the upper winding of recording re ed"`send-back segment B84 in the receiving dis
lay 80 ;to.battery. Relay I0. upon energizing. at- tributor the brush lRB in the transmitting
distributor will engage the receiving segment R4.
armature 3| prepares a point in the chain cir
cuit‘for. energizing relay 88;` at armature 32 at which time a circuit may be traced for re
completes a locking circuit for itself through its cording relay 80 as follows: from ground, by way
lower winding from grounded armature 20: and of amature 488. segment R, brush RS. segment
y at armatures 33. 34, and 06 prepares circuits
for operating certain magnets in the recorder-or
for lighting certain indicator lamps in “ the
80 to battery. `Relay 60. upon energizing.' at
indicator.
armature“ completes a locking circuit for it 10
,
'
The brushes of the two distributors continue
ontheir rotation and when the transmitting
`brush TS engages the transmitting segment T4,
a circuit may be traced for energizing the pulse
l fis relay 18 as follows: from ground'` through the
right-hand springs of key KI, conductor 4,
transmitting segment T4, brush TS, segment T,
and thence over the previously traced circuit to
the pulse relay 18. The pulse relay 18 is ener
gized over the above traced circuit and trans
mits `a pulse over the conductor |00 as long
as the brush TS engages the grounded bank
segment T4. Shortly after the brush TSin the'
transmitting distributor engages the transmit
ting segment T4, the receiving brush RS in the
` receiving distributor engages the receiving seg
"
R4, armature' I4 and its resting contact, and
through the upper 4winding of recording relay
self through its lower winding from grounded
amature 28 and at armature 83 completes a
circuit for energizing the relay 41 in series with
the magnet MI` or the lamp L| (not shown) in
the lamp indicator. This circuit may be traced 15
as follows: from ground through the lower
winding of relay 41, switch SW2, armature 63,
armature 35, and from thence through the wind
ing of magnet MI to battery or through the lamp
L| (not shown) to battery. The recording re 20
lays RR are operated in combinations of two to
complete only one circuit and in this particular
instance it will be seen that the only circuit com
pleted is the circuit through armatures 35 and
63 for lighting the lamp L| or operating the 25
magnet MI of the printing recorder. Referring
to the code shown in Fig. 2,\the left-hand verti
ment R4. The relay |0| is energized by the
pulse transmitted over conductor |00 and at `cal column represents the key or device oper- ~
armature |03 completes a circuit for energizing ated while the double` vertical column repre
30 relay |40 as follows: from grounded armature sents the code or the combination of recording 30
|03, springs |80, segment R, brush RS, segment relays operated. For example, when the digit |
is transmitted the key KI is operated to trans
" , R4, and through the upper winding of recording
mit the code |---4 `which causes the first and
relay |40 to battery. Relay |40, upon energiz
fourth recording relays to be operated to in turn
ing, at armature | 4| grounds the send-back seg
operate thewñrst device or ñrst lamp in the 35
35 ment `SB4;¿at armature |42 completes a lock
»ing circuit for itself through its lower winding,
ABy the operation of the recorder magnet M|
`from grounded armature |1|; and at armature
|44 completes a circuit for energizing relay |14. or the lamp Ll the operator is given an indication
indicator.
The closure of armatures |45 and |46 are with
40 `out eifect at this time since the relays |30, |50,
or |60 are not operated. It should be noted‘that
only two of the recording relays are operated
\ for any one code and that only one circuit is
closed by such a combination for operating a
45 lrecorder magnet or a switching device. In the
particular case just illustrated the circuit closed
by the operation of recording `relays ||0 and
|40 is as follows: from ground through the lower
high-resistance winding of relay |14, normally
closed contacts controlled by armature |81, ar
mature |44, armature H6, `and through the
winding of magnet PI to battery. The magnet
`PI is not energized over this circuit on account
l of `the high resistance in the ; lower winding of
55 relay |14.
Relay |14, however, energizes ìover
the above-traced circuit and at armature |15
prepares a point in the circuit for energizing re
„ lay |12, at armature |11 prepares a point inthe
circuit for energizing the pulse relay |04; and
‘at armature |16 completes a circuit for oper
ating thedash-pot relay |18. The dash-pot re
“ lay` |18 is energized and-very slowly `operates
on account `of the oil in the well shown directly
below the relay.
65
'
As soon as the send-back brush SB ‘engages
the send-back segment SB4, a circuit may be
traced for energizing the pulse relay |04 as fol
lows: from »grounded 4armature |4|, send-back
segment SB4, brush` SB, segmentA S,` and through
Y
‘
~
l
that the proper code has been transmitted and
sent back and therefore the proper switching de 40
vice or recorder magnet has been selected. Relay
41, upon energizing, at armature 56 and its rest
ing contact disconnects the transmitting segment
T and at its Working contact connects> the pulse
relay 18 to conductor 89; at armature 51 prepares 45
a point in the circuit for relay 36; and at arma
ture: 58 prepares a locking circuit for itself in
cluding its upper winding. Just before the brush
TS `completes its firstrevolution said brush en
gages the grounded segment 16 whereupon a cir 50
cuit may be traced for energizing the key unlock
magnet 66 as follows: from ground by way of
segment 16, brush TS, segment 11, and through
the winding of key unlock magnet 66 to battery.
Magnet 66, upon energizing, operates its arma 55
ture 61 to move the locking bar 68 to permit the
key KI to release to its normal position. The
magnet 66 isldeenergized when the brush RS
leaves the 'segments 16 and 11, after which the
brushes TS, EC, and RS are stopped in their 60
normal positions or the positions shown in the
drawings by the start-stop magnet i9.
l
"From the foregoing it will be seen that in a
single revolution of the two distributors, the
transmitting distributor has sent the `code |---ii 65
for `digit l over wire |00 to the receiving dis
tributor‘which in turn has sent back the same
code it received over Wire |00 to cause the trans
mitting distributor, through the receiving seg
ments, to` operate a recorder or indicatorwhich 70
indicates if the transmission is correct. In the re
conductor |00 to the transmitting distributor. ceiving transmitter the remote recorder or de
70 the‘winding of pulse relay |04 to battery. ` A
pulse» is therefore transmitted back over the
whereupon the differential relay 86 is energized
in the same manner as previously described.
75 `Shortly after the brush SB engages the ground
vice is` prepared for operation and if no wipe-out
signal is transmitted then the recorder or device
is operated after a predetermined time by the 75
4
3,181,108
operation of the dash-pot relay |10. Thedssh
pot relay |10 operates its springs |10 and |00
transmitting distributor to indicate the actual
only a predetermined time after its circuit is
which lthe transmitting and
apparatus
return to normal position ready for another code
closed by the energisation of relay |14. This
time interval is suillcient to allow the operator
at the transmitting station to see if the proper
code has been transmitted and received and to
transmit a wipe-out code to release the 4prepared
eonnectionin case some fault has occurred.
when dash-pot relay |10 Vcloses springs |10, a
l circuit may be traced for operating lthe prepared
recorder magnet PI as follows: from grounded
springs |10, through the upper low-resistance
winding of relay I 14, normally closed springs con
trolled by armature |01. armature |44. armature
||0, and through the winding of recorder magnet
PI or the magnet of a switching device to bat
tery. At springs |00 dash-pot relay disconnects
Vthe reoeivingsegment R from armature |00.
When the switching device or magnet Pi oper
ates, a circuit ls closed by the armature of such
device to ground conductor |00. thereby com
pleting a circuit by way of armature |00, arma
ture | 11, for; energizing relay |04. The energiza
25 tion of relay |04 at this time now transmits a
pulse back over the conductor |00 to indicate the
` actual operation of the switching. device or
operation of the remote device or recorder after
transmission.
-
In case of trouble the transmitting distributor
will notreoeivethesamecodeasittransmitted
and the recorder or lamp. indicator will there»
fore indicate the trouble to the operator. The
operator will thereupon operate the wipe-out key 10
WGK to wipe out the set-up and release the re
mote prepared recorder or device before the same
is operated in response to the complete opera
tion oi’ the dash-pot »relay |10. Responsive to
the operation of tbe wipe-out key WOK relay I0 15
is energized over an obvious circuit and grounds
the start conductor |0 and conductors | to 0,
f inclusive.
_
Rœponsive to the grounding of the
start conductor I0 the start-stop magnets I0 and
|00 and relay 20 are operated as previously de 20
scribed with the result that the two distributors
are now‘ started in operation. . Since all of the
transmitting segments Ti to T0, inclusive, are
grounded. the pulsing relay 10 is therefore con
tlnuously energized'during the time it takes the
brush‘TB to pass from the segment TI beyond
the segment T0. The differential duplux relay
|0|> at the receiving distributor is therefore en
recorder magnet. This impulse operates the re
lay 04 to close the following circuit; At armature . ergized during this time or the time it takes the
01 relay 00 completes a circuit by way of the brush R8 to pass from the segment RI beyond the
working contact of armature 00 and said arma
Bement R0. The brush RB therefore succes
ture for energizing the pulse relay 10 and by way sively connects ground from armature |00 to the
of armature 01 for operating relay 00 and by way successive- receiving segments RI to R0, inclusive.
of amature 00 for completing a locking circuit for successively energizing the recording relays
through the upper winding of relay 41. By the ¿|0, |20, |00. |40, |00, and |00. The recording
operation of pulse relay 10 a pulse ls transmitted relays therefore energize in" succession and lock
over the conductor |00v for operating the relay themselves in energized position through their
|0| in the remote oilice. >Responsive to the en
lower windings in the same _manner as previous
ergization oi' relay 00, said relay at armature 01 ly described. At armatures III, |2|, Ill, |4|,
completes a circuit for energizing relay 20 where
|0|, and |0| the recording relays ground the send 40
upon the latter relay at armature 29 opens the back segments SBI to SBO, inclusive, and there
locking circuit of the locked recording relays 00 fore when the send-back brush SB encounters
and 00 which thereupon likewise deenergize. 'I'he these segments the pulse relay |04 is energized for
pulse transmitted back over conductor |00 oper
the duration it takes the send-back brush SB to
ates relay |0| which at armature |02 completes a pass from the send-back segment SBI beyond the 45
circuit for energizing relay |12 by way of arma
send-back segment S30. Pulse relay |04 sends a
ture |10. Relay |12, upon energizing, at‘arma
long wipe-out pulse over the conductor |00 to the
- ture |10 closes a circuit for energizing relay |10 - duplex relay 00 which is energized for the dura
which at amature |1| opens the locking circuit tion of this pulse. At armature 00 the duplex
of the operated recording relays ||0 and |40. Re
relay 00 grounds the receiving segment R with
sponsive to the -deenerg'ization of the recording- the result that the recording relays 00, 40, 00, 00,
relays ||0 and |40 the magnet PI and relay |14 10, and 00 are energized successively. The re
deenergize. The deenergization of relay |14 at cording relays in the transmitting distributor
amature |11 opens the circuit of the pulse relay therefore energize- and lock themselves through
l.|04 to terminate the pulse to the transmitting their lower windings in the same manner as pre 55
oillce. at armature.- |10 opens the circuit to relay viously described. Since all of the recording
' |12 and at armature |10 opens the circuit oi' the
dash-pot relay |10. After a short interval the re
lay |12 deenergizes and in turn causes the deener
gization of the slow-to-release relay |10. The de
energizstionof relay |10 again grounds armature
|1| to provide the locking circuit for the recording
relays. The deenergization of the dash-pot relay
|10 restores the springs |10 and |00- to their nor
mal positions whereupon the springs |00 prepare
the start clrcuit'for enabling the start pulse of
the next code-to operate the start-stop magnet
« |00. Responsive to the termination of the pulse
from the receiving distributor relay 00 deener
gizes, thereby opening the circuit to relays 10 and
41, whereupon such relays deenerglze to restore
relays are now energized the chain circuit for en
ergizing the relay 00 may be traced as follows:
from ground by way of armature 3|, armatures
4|, 0|, 0|; 1|, 0|, and through the winding of re
lay 00 to battery. At armature 01 relay 06 closes
the circuit for energizing relay 20 which there
upon energizes and at armature 29 opens the
locking circuit of the recording relays which
thereupon deenergire. In the receiving distrib 66
utor the recording relays are all energized with
the result that the chain circuit for energizing
relay |12 is completed as follows: from grounded
armature III and by way of armatures |23, |33,
|40, |00, and |00 and through the winding of re 70
lay |12 to battery. Relay |12 is energized over
the relays and apparatus to normal positionin . the above-traced circuit and at amature |13
readiness for the next code. From the foregoing completes a circuit for energizing relay |10. At
it can be seen that when the device in the remote armature | 1| relay |10’ opens the locking circuit
75 »omce operated a pulse is transmitted back to the of the recording relays with the result that the
75
5 .
2,121,163
windings from ground by way of armature |02
and the receiving segments R., RI and R6. As
before, relays ||0 and |80 at armatures ||| and
|8| ground the send-back segments SBI and SBS
with'the result that the pulse relay |04 is oper
recording relays are all now deenergized. Since
the dash-pot relay |18` only operates its springs
|10 and |80 after a predetermined time.` the re
ceipt of the wipe-out code `iust described is there->
fore received before thedash-pot relay |18 has
had time to operate the springs |19 and |80. `'I‘he
ated during the interval the brush SB is in en
wipe-out code has therefore wiped out or released
sagement with the segments SB| and‘SBíì. In
' the prepared circuit for operating the selected re
corder or switching device before the same is
actually operated. After the release of the re
a manner` similar~to that previously described,
cording relays the circuit to relay |12 is opened
whereupon this relay deenerglzes and opens the
circuit of relay |10. After an interval relay |10
deenergizes and again at armature |1| prepares
15 the locking circuit for the recording relays. In
the transmitting distributor in a similar man
the pulse relay |04 causes the‘operatlon of the ,
duplex 'relay 86 over conductor |00 to connect
ground by way of armature 88 to the receiving
segment R in the transmitting distributor at
a time when the brush RS engages the receiving
segments >Rl and R6. Recording relays~30 and
80 are therefore operated andlock by Way of their
lower windings to grounded armature 2| on the
ner the deenergization of the recording relays
therein opens the- circuit of relay 88 which there
upon deenergizes and opens‘the circuit of relay
it. After an interval >relay 28 deenergizes and
again establishes the locking circuit for the re
cording relays at armature 28. The brushes of
these two distributors are now stopped in their
starting positions and allof the apparatus is now
in normal position ready to transmit the next
The foregoing circuits Just described are
. code.
especially adaptable for use in remote control sys
tems where a positive check is required to in
sure that the proper device is selected and that
30 the device has actually operated.
Y
The `circuits can readily be changed to a -print
` ing telegraph system by the operation of switches
SWi and SWE andthe operation of thetransfer
key
. By the operation of the switch SWi the
35 locking circuit ofthe recording relay is trans
ierred from armature 2li to armature ti of the
start-stop magnet i8. In this case the recording
relays which have been operated in response to
the lastutransmitted code are maintained in op~
40 erated position over their locking circuit until the
start magnetis `energized subsequently in` response
to transmitting a succeeding code. By the op»`
eration of the switch SW2 the relay di is discorr
nected from the operating circuit with the result
that the relays 28, 88, and il are ne longer em
ployed since the release of the recording` relays
is now dependent upon the operation oi armature
2i oi' the start-stop magnet id. Responsive to the
operation of the transfer key `'JFK the start con
50 ductor i8 is grounded by the left-hand pair oi’
springs while the conductors i andt are grounded
by thekcenter pair and the right-hand pair `oi ,
start-stopl‘magnet I0.
A circuit may now be
traced for lighting the transfer lamp TL to'give
the operator an indication that the transfer >code
has been properly transmitted and received back. 20
This circuit may be traced from ground by way
of switch SW2 in dotted operated position, arma
ture 83, armature 85, and through the filament
of the lamp TL to battery. In the receiving dis
tributor the relays liti and |80 lock through their 25
lower windings in thel same manner as previously
described and Àat‘this time complete a `circuit for
energizing relays |14 and |82 in series as follows:
from ground through the lower winding of relay
i'id, normally closed contacts controlled by ar
mature idi, armature iid, armature |88, arma
ture idi and its resting contact, and through the
winding of relay |82 to battery. At armature
idd relay idd prepares a circuit for energizing -
relay ißt, which, however, is not energized at this 35
time because the latter` relay is partially short
circuited from‘ground through the lowe wind
ing of relay iM and from ground at armature
idd. at armature i8!! relay itt completes a cir
cuit for energizing transfer relay |8i by way of 40
grounded armature ist. Relay iti, upon ener
gizing, at armature itt disconnects the grounded
armature `i‘lii from the locking windings of the
recording relays and substitutes ground from
armature iii‘i of the start-stop magnet ißt. At 45
armature` iti `relay iti disconnects the circuit
extending to relay i'id and substitutes the ground.
at armature `iß'íi. At armature ||88 relay i8i
opens a point in the circuit‘extending to-the pulse
relay idd. The relays iid, i'it, iid, and |18 are 50
now disconnected and are no longer used at this
time.
l
~
-
’
i
l
springs. The start-stop magnets iâiand tilt are
The transmitting andreceiving apparatus are
now energized in the same manner as `previously
now ready to transmit and receive a message and
55 described to'start the two distributors in opera
tion.,v The start-stop magnet, upon energizing, at
armature 2i unlocks any of the recording relays
which at this time may bein operated position.
Relay 20 is likewise energized in the same manner
previously described to open the circuit to the
60 `as
start-stop magnet I9 at armature 22. Since the
transfer key TK is locked in `operated position
,during the `revolution of the transmitter dis
tributor` `brushes the transmitting segments Ti
65 and TS are therefore grounded and when the
brush TS encounters vthe first and sixth segments
during its revolution the pulsingrelay 18 is ener
gized in the same manner as previously described
Ato operate the duplex relay |0|` associated with
70 the receiving distributor in the receiving ofiice.
the operator thereupon operates the keys as be 55
fore to energize the two start magnets i8 and.
idd, winch.` at their respective armatures 2i and
|01 `open the locking circuit ‘of any of the `locked
recording` relays such as `relays 30 and 80 in
the transmitting distributor and relays ||0 and 60
|88 in the receiving distributor. The deener
gization or the recording relays 30 and 80 ex
tinguishes the lamp TL. `The deenergization `of
relays H0 and |60 at armatures ||4 and |86 opens
the original energizing circuit of relay |82 and 65
at the same time removes the short circuiting
ground from around relay |83 with the result
that the relay |83 r?ow energizes in series with
relay |82 as follows: from ground by way oft
Since the two distributors operate in synchronism
armature |89, armature |85, through the winding 70
of` relay |88, and through the winding of relay
the relay ||l| will be operated at the time when
the brush RS engages the receiving segments Rl
and R6 with the result that the recording relays
75 ||0 and |60 will‘be operated through their upper
|82 to battery. ,Relays |82 and |83 are main
tained energized over this circuit until another
transfer code is transmitted. At armature |9|
relay |83 disconnects the relays |82 and |88 from 75
2,121,163
the transfer conductor and connects the relay I“
abling the operator to transmit codes one after
thereto. At armature Il! relay III prepares a
point inthe circuit for later on energizing relay
IIIIwhen a- subœquent transfer code is trans
mitted.
the other as soon as the keys are unlocked with
out checking each code comprises a dinerential
error checking relay which is 'operated only when
the transmitting distributor receives a code back
from the receiving distributor which does not
-
Before proceeding with the description it may
. be vadvisable at this time to describe the opera
tions which take place when a subsequent trans
fer code is transmitted. For this purpose it will
io be assumed that the recording relays iiii and itil
are again energized bya subsequent transmitted l
transfer code and therefore a circuit for ener
giaing relay I“ may be traced as follows: from
ground by way of armature lli and its working
'is contact, and through the winding oi' relay i“
to battery. When the start-stop magnet |06
is energized to start the receiving distributor,
ground is removed from the lower locking wind
ing of the operated recording relays with the re
-suit that the recordingrelays open the original
energixing circuit of relay i“ and remove the
short circuit from around relay- lli. This short
circuit may be traced from grounded amature
agree with the code transmitted. As long as the
codes received by the transmitting distributor
agree with the codes transmitted by the same for
each revolution the differential error checking 10
relay is not- operated, but when there is adis
agreement then the error checking relay oper
ates to cause an error lamp to light to indicate
fault or disagreement. - To use this preferred
checking'- arrangement the operator operates
turn-key Kto energize relay SI over an obvious
circuit. Relay 8l, upon energizing, at armatures
8i to 88, inclusive, disconnects the recording re
lays and connects the receiving Segments Ri to
R6, inclusive, in multiple through the lower wind 20
ing ofthe error check relay 2l. At amature Il
relay 90 connects the upper winding of the
diii'erential error check relay 2O to the error
Il‘l, amature ill, amature i“, transfer con .checking segment C. 'I'he 'recording relays, the
ductor, armature III and its working contact, recorder and the lamp indicator are not used and 25
through the winding of relay Ill, armature Il! are not needed in this circuit arrangement. The
to grounded amature lll. As vlong as the re
oording relays lil and III are in energized posi
tion the short circuit around relay Ill is Amain
two distributors operate in the same manner as
previously described in response to the diiferent
key operations and in case the key KI is oper
tained and as soon as the recording relays are ated it will be seen that the checking Segment Ci 30
deenergized the .ground fromy conductor |81 is 'is grounded by the middle pair of springs of key
disconnected with the result that relay Il! ener
KI while the checking segment C4 is grounded
giles in series with relay I“ from >‘grounded
armature ill and amature |02.- At armature
I" relay Ill opens the circuit of relays in and
il! which now deenergine and atA armature |96
by the right-hand pair of springs of key Ki.
wise deenergizes. The deenergization of relay
Il! at armature lll opens afurther point in its
recording relays and recorderand the substitu
to the receipt of the second transfer code.
at the same time that the brush RS engages the
The operation of the receiving distributor is iden
tical with that previously described, while in the 35
transmitting distributor the circuit’operations are
opens the circuit of transfer relay III which like- ' slightly different due to the disconnection of the
tion of the error check relay I6. In ease the
own locking circuit and` at armature I" opens code is properly received and sent back by the 40
a further point in the circuit of transfer relay receiving distributor then relay ß is operated to
lli. At armature "i relay ill ‘again prepares ground the receiving segments Ri and R4 when
the circuit Vfor relay Il!l and at armature Il! - the brush Rs encounters _these segments. As
opens the locking circuit of relays- I“ and ill will-be seen in the drawings the error checking
Whichlikewiae :now deenergiae. The transfer segment and the receiving segment are in the
relays III to Ill, inclusive, have now, therefore, same- relative positions with respect to the 45
been restored back to their normal position, .or brushes EC and RS and therefore the brush EC
the position shown in the drawings, in_response will
reach and engage the checking segment Ci
'
After the transmission of the ?rst transfer code
_resulting in the energisation of the transfer re
lay Ili the operator may operate the keys as fast
as the same are unlocked to transmit the required
message. By watching the recorder or the lamp
panel the operator can' see lif the proper codes
are being transmitted and received for each key
operation. The operation of the two distributors
is similar to that previously described and at the
receiving segment Ri. When the brushes EC 50
land RS reach the `segments CI and Ri, which
they do simultaneously, _then two circuits may be
traced through the upper and lower windings of
the‘differential error checking relay 2l: from
ground by way of the middle spring combination 55
of key Ki, conductor i, checking segment Ci,
brush EC, segment C, armature I1, and re
sistance through the upper winding of differen
l start of each rotation the start magnets il and'A tialvrelay 2C to battery; the second circuit ex
Ill deenergise any of the locked recording relays _ tends i’rom grounded armature 8l, receiving seg
by the operation of - their armatures 2|
ment R, brush RS, receiving segment Ri. arma
and ill and after thevbrushes of the ture 9| and its working contact, and through the
distributor have moved past their start lower winding of diüerential relay 2C to battery.
Segments or when relay,” has -nperated- to Relay 2l `does not energize over these circuits be
open the start circuit extending to the start mag
cause its two windings are equal and oppose each 65
nets. ' The start-stop magnets Ill and Il are de
other, with the result that the two windings
energized to stop the brushes after 4they have neutralize the magnetic effect upon the armature
made one complete revolution -and to release
their vrespective armatures to provide a locking
70,-, ground >for therecording relays. The operation
ofthe keys to >transmit the desired message re
sults in the operation of the two distributors for
eachfkey operation in the same manner as pre
viously described.
u
.
-
-
»
The preferred checking ararngement for en
of the relay. vIn a similar manner~.~when' the
brushegEC and RS simultaneously engage the
segments C4 and R4, circuits through both the 70
uppery and lower -windings are simultaneously
closed to prevent the energization of the differ
ential relay 20.
In case of fault, such as dirty contacts, im
proper synchronism of the two distributors, or 75
7
2,121,163 ‘
4. In a. distributor system. a transmitting dis
tributor, a receiving distributor, means for start
any other trouble which may cause the transmit
ting distributor to receive a code `different from
ing and operating said distributors in synchro- Y
that which it transmitted, then it can be seen
that a circuitv will be completed through only one
winding of the differential error check relay 26
with` the result that this relay then energizes.
A circuit through-either winding of the differ
ential relay alone will ca.usethe relay to energize
nism, means in the transmitting distributor for
transmitting ‘a code during a single rotation`
thereof to the receiving distributor, and means
in the receiving distributor for receiving and
sending ‘back said code during a single corre
sponding rotation thereof to the transmitting
and `at armature 21 complete a circuit for ener
10 gizing relay 38.
At armature 39 relay 38 com
pletes a locking circuit for itself from grounded
armature 29 and at armature d6 completes a cir
cuit for lighting the error lamp EL. By the light
distributor.
, ing ofthe error lampvEL the operator knows that
"some `trouble has occurred and therefore stops
further transmission of the Amessage until the
fault is corrected. In order to release the ~~locked
relay 38 the push-key PK is operated by the op
erator to complete an obvious circuit for energiz-~
20 ing-relay 28 which thereupon operates its arma
ture 29 to open the locking circuit oi relay 38.
Responsive to the operation oí relay 28 relay 38
deenergizes and at armature dt opens the circuit
of the error lamp EL and when the push-key PK
25 is released the relay 28 deenergiaes after an in
i
25
code. i
6. In a distributor system. a transmitting dis
terval to `release its armature it. After the
trouble has been corrected, the messages are
tributor,` a receiving distributor, means for start
transmitted and‘checired for each revolution oi
ing and operatingsaid distributors in synchro
the distributors in the manner just described.
Having described the invention, what is con
sidered to be new and is desired‘to be protected
by Letters Patent will be described in the fol ,
nism; means in the transmitting distributor for
transmitting a code during a single rotation there 30
of to the receiving distributor, means in the re
ceiving distributor for receiving and sending baclr
said ‘code during a single corresponding rotation
thereoi to the transmitting distributor, means as
sociated with said> transmitting distributor op 35
lowing claims.
»
`
What isclaimed is:
35
‘ ,
5. Ina distributor system, a transmitting dis
tributor, a receiving distributo'n‘means for start
ing and operating said distributors in synchro
nism, means in the transmitting distributor for ‘
transmitting a code during a single rotation'l 15
thereof to the receiving distributor, means in the
receivingfdistributor for receiving and sending
back said code during a single corresponding ro
tation thereof to the transmitting distributor, and
means associated with said transmitting dis 20
tributor operated during said single rotation in
response to the code sent back by the receiving
distributor for checking thegcode tcdetermine
if the received code agrees with the transmitted
_
`
.
1. In a start-stop distributor system wherein
a receiving distributor is operated in synchronisrn
erated during said single rotation in response to
the code sent back by the receiving distributor
with a transmitting distributor for each rotation
thereof during the transmission of codes, and ` for checking the code to determine if the received ’
code agrees with the transmitted code, and means
forindicating disagreement in case the code sent 4:0
means associated with the receiving transmitter
H40 for transmitting baci: to the transmitting dis
back disagrees with _the transmitted code.
tributor the same identicai‘code which it re
a single synchronous rotation ci said distributors.
7; In a distributor system,` a transmitting dis
tributor. a receiving distributor, means ior start
2. In a start-stop distributor system wherein a
ing and operating said distributors in synchro
i ceived from the transmitting distributor during
nisrn, means in the transmitting distributor ior
marking a code therein and for transmitting said
code to the receiving distributor during a single
synchronous rotation of said distributors, means
in the Vreceiving distributor for receiving and
receiving distributor` is operated in synchronism
with a transmitting distributor ior each rotation
thereof 'during the transmission oi codes, means
associated with the receiving transmitter for
transmitting back to the transmitting dis
tributor the same identical code which it
received from the transmitting distributor dur
ing a` single synchronous rotation i‘ oi said
distributors, and checiring means associated
with the transmitting distributor for checking
sending baolr said code to the transmitting `dis 50
tributor during said single synchronous rotation
of said distributors, and means associated with
said transmitting distributor-operated during said
single‘synchronous rotation‘in response tothe 1
code sent baclr by the receiving distributor for 55
checking the code to determine ii the received
transmitted code for each single synchronous ro- ` sent-bacia code agrees with the marked transmit
‘ `the code received from the receiving distributor
to determine if the received code agrees with the
tation thereof,
ted code.
.
.
»
v
8. lin a code transmitting system wherein dif
60 receiving distributor is operated in synchronism ferent codes each comprising a pluralityof pulses 60
separated by‘different time intervals in each code
with a transmitting distributor i’or each ro
tation‘thereof during the transmission of codes, transmissionperiod are transmitted over a single
3. In a start-stop distributor system wherein a
means associated with the receiving transmitter
conductor, means for transmitting a single code
for transmitting back to the transmitting dis- , over said conductor in one direction and respon
tributor the same identical code/which it received
from the transmitting distributor during a single
synchronous rotation of said distributors, check
ing means associated with the transmitting dis
tributor for checking the code received from‘the
receiving distributor to determine if the received i
single synchronous rotation thereof, and means
operative for indicating disagreement incase the
.
i
> 9. yIn a code transmitting system wherein dif
transmission `period are transmitted over a single
conductor, means for transmitting a single‘code
code sent back disagrees ywith the transmitted
.
sion period.
ferent codes each comprising a plurality of pulses
separated by diiîerent time intervals in each code'
code agrees with the transmitted code for each
code.
sive thereto for simultaneously therewith receiv
ing and retransmitting said single code back over
said conductor in the opposite' direction to check
such transmission during a single code transmis
.
‘ over `said conductor in one direction and respon
70
8
9,131,103
sive thereto for simultaneously therewith receiv
ing and retransmitting said single code back over
said conductor in the opposite direction to check
suchl transmission during a single code transmis
sion period, said means including a pair o! start
retransmitted code during said one revolution.
‘15. In a start-stop distributor system, a trans
stopdistrihutors operated in synchronism during
mitting distributor comprising transmitting seg
ments, error checking segments, receiving seg
each code transmission period.
10. Ina code transmitting system, a transmit
ting circuit comprising only a single conductor,
10 means tor transmitting a single code comprising
ments, and co-operating brushes, character keys,
means responsive to the actuation of one of said
a plurality of pulses over said conductor in one
direction, and means responsive thereto for re-l
ceiving and retransmitting said single code back
over said conductor with the pulses oi the re
15 transmitted code being concurrent with the
pulses oi.' the transmitted code.
11. In a code transmitting system, a transmit
ting circuit comprising only a single conductor,
means for transmitting a single code comprising
a plurality of pulses over said conductorfin one
direction, means responsive thereto for receiving
Vand retransmitting said single code back over
said conductor with the pulses oi' the retrans
mitted code «being concurrent with the pulses
oi’ the transmitted code, and checking means
operative in case the retransmitted code disagrees
ating with said marked error checking and re
ceiving segments'and their co-operating brushes
for checking the accuracy of said transmitted and
keys for marking certain transmitting and error 10
checking segments, means responsive to the actu
ation of said key for operating the brushes of
said distributorin one revolution to transmit a
code corresponding to the marked transmitting
segments, a receiving distributor operated in syn 15
chronism with said transmitting distributor for
receiving and retransmitting said code back to
the transmitting distributor, means for marking
the receiving segments in the transmitting dis
tributor during said one revolution in accord 20
ance with the retransmitted code, said error
checking segments corresponding to said receiv
ing segments, and means operative in response
to the rotation oi.' the error checking brush and
the receiving brush in said one revolution of the 25
transmitting distributor in case the marking of
' with the transmittedcode.
said receiving segments disagrees with the mark
ing of the error checking segments.
16.’ Ina start-stop distributor system, a trans
30 means for'transmitting a single code comprising mitting distributor, a remote receiving distribu
30
a plurality of pulses over said conductor in one di- ' tor, remote devices associated with the receiving
yrection, means responsive thereto for receiving distributor, keys corresponding to said devices
and retransmitting said single code back over associated with the transmitting distributor,
12. In a code transmitting system, a transmit
u ting circuit comprising only ‘a single conductor,
said conductor with the pulses of the retrans
mitted code being concurrent with the pulses
oi the transmitted code, and means operated
responsive to said retransmitted code tor record
’ ing said retransmitted code.
13. In a start-stop distributor system, a trans
mitting distributor comprising transmitting seg
ments, error checking segments, receiving seg
ments, and co-operating brushes, character keys,
, means responsive to the actuation of one of said
keys for marking certain transmitting and error
checking segments, means responsive to the ac
tuation of said key tor operating the brushes
of said distributor> in one revolution to transmit
a code corresponding to the marked transmitting
means responsive to the operation of one oi.' said-
keys for operating the transmitting and receiving 35
distributors in synchronism for one revolution,
means including said transmitting distributor
for `transmitting a code during' said revolution
corresponding to the key actuated, means asso
ciated with the receiving distributor operated in
response to said transmitted code for selecting
the device corresponding to the actuated key and
i'or retransmitting said code back to the trans
mitting distributor during said synchronous rev
elution, means associated with the transmitting
distributor for recording the retransmitted code
during said single synchronous revolution there
by recording the accuracy of the transmitted and
retransmitted code to insure correct selection of
the desired device, a time delay operating means
for operating the selected device, automatic
segments, a receiving distributor operated in syn
chronism with said transmitting distributor for
receiving and retransmitting said code back to
the transmitting distributor, and means co-oper
ating with said retransmitted code, said marked
error checking segments, said receiving segments,
and cin-operating brushes of the transmitting dis
means for transmitting an impulse from the re
tributor during said one revolution for determin
ting an impulse from the transmitting distribu
i »ingif the transmitted -code agrees with the re
transmitted code.
14. In a start-stop distributor system, a trans
mitting distributor comprising transmitting seg
ments, error checking segments, receiving seg
ments, and co-operating brushes, character keys,
means> responsive to the actuation o! one of said Y
keys for marking vcertain transmitting and error
checking segments, means responsive to the actu
ation oi said -key for operating the brushes of
said distributor in one `revolution to transmit a
code corresponding to the marked'transmitting
segments, a receiving distributor operated in syn
70 chronism with said transmitting distributor for
receiving and retransmittingv said code back to
the transmitting distributor. means for marking
the >receiving segments in the transmitting dis
tributor during said one revolution in accordance
75 with the retransmitted code, and means co-oper
ceiving distributor to the transmitting distributor
in response to the actual operation of said device,
automatic means responsive thereto for transmit 55
' tor to the receiving distributor to release the se
lecting means, and a wipe-out key for reoperat
ing said distributors to wipe out the prepared se
lection if operated a predetemined time before 60
the time delay operating means is fully operated.
17. In a start-stop distributor system, a trans
mitting distributor having a plurality of trans
mitting segments and corresponding checking and
receiving> segments, character keys associated 65
with said distributor, means responsive to the op
eration of one of said keys for marking certain
of said transmitting and corresponding'checking
segments and for operating said distributor tov
transmit a code in accordance with the marked 70
transmitting segments, means including a remote
synchronously operated receiving distributor for
receiving said code and for retransmitting said
code back to said transmitting distributor,v means
responsive to said retransmitted code for mark 75
9
2,121,108
ing said receiving segments in accordance with
o! impulses during a single corresponding rota
the retransmitted code, a diiferential relay hav
tion thereof to the transmitting device, and check
ing means operative in case said checking sig'
nal fails to correspond to said transmitted signal.
23. In a transmitting system. a transmitting
device, a receiving device, means for starting and
operating said devices in synchronism, means in
said transmitting device for transmitting a coded
ing two windings. means connecting said receiving
segments to‘ one winding of said relay. means
for connecting said checking segments 'to the
other winding of said relay. and means for op
erating said relay in case said marking means
fails to mark receiving segments corresponding to
the marked checking segments.
10
18. In astart-stop distributor system.' a trans
mitting distributor having a plurality of trans
mitting segments and corresponding checking
and receiving segments, character keys associated
with said distributor, meansY responsive to the
15 operation oi’ one of said keys for marking certain
of said transmitting and corresponding checking
segments and for operating said distributor to
transmit a code in accordance with the marked
transmitting segments. means including a re
20
mote synchronously operated receiving distribu
.tor for receiving said code and for retransmitting
said code back to said transmitting distributor,
means responsive to said retransmitted code for
marking said receiving segments in accordance
25 with the retransmitted code, checking means as
sociated with said transmitting distributor, means
connecting said receiving segments to said check
ing means, means for connecting said checking
segments to said checking means, and means for
30 operating said checking means in case said mark
ing means fails to mark receiving segments cor
responding to the marked checking segments.
19. In a start-stop distributor system, a trans
mitting distributor having a plurality of checking
35 segments and a corresponding plurality of re
ceiving segments, means for operating said dis
tributor, a differential relay having two wind
ings, means connecting said receiving segments to
one Winding of said relay, means for connecting
40 said checking segments to the other winding oi'
said relay, means for marking corresponding
checking and receiving segments, and means re
sponsive to the operation of said distributor for
operating said relay in case said marking means
fails to mark corresponding checking and receiv
ing segments.
mitting distributor having a plurality of check
ing segments and corresponding receiving seg
ments, means for operating said distributor,
means for marking corresponding checking and
receiving segments, checking means associated
with said distributor, and means responsive to
the operation of said distributor for operating
said checking means in case said marking means
fails to mark corresponding checking and re
ceiving segments.
21. In a transmitting and checking system, a
transmitting device having a plurality of check
ing positions and corresponding receiving posi
tions, means` for operating said device, means
for marking corresponding checking and receiv
ing positions, and checking means operated re
sponsive to the operation of said device in case
said marking means fails to mark corresponding
checking and receiving positions.
ceiving device, means including relays operated
in the receiving device in response to said trans
mitted signal for sending back a corresponding
checking signal during a single corresponding
rotation thereof to the transmitting device, check
ing means operative in case the code of said
checking signal fails to correspond to the code
of said transmitted signal, and means for re
leasing said operated relays at the commence
ment of a succeeding signal.
24. In a transmitting system, a transmitting 20
device, a receiving device, means for starting and
operating said devices in synchronism, means in
the transmitting device for transmitting a signal
to said receiving device during a single rotation
thereof, means in the receiving device for re
‘
22. In a transmitting system, a transmitting
device, a receiving device, means for starting
25
ceiving said transmitted signal and for sending
back a corresponding checking signal during a
single corresponding rotation thereof to the trans
mitting device, meanslior recording said check
ing signal upon receipt thereof, and means for 30
delaying the recording of said transmitted signal
for an interval.
25. In a transmitting system, a transmitting
device, a. receiving device, means for starting
and operating said devices in synchronism, means
in the transmitting device for transmitting a
signal to said receiving device during a single
rotation thereof, means in the receiving device
for receiving said transmitted signal and for
sending back a corresponding checking signal 40
during a single corresponding 4rotation thereof
to the transmitting device, means for recording
said transmitted signal, _and means for trans
mitting additional signals while said devices are
at rest for indicating completion of the record 4:5
ing operation.
20. In a start-stop distributor system, a trans
60
signal during a single rotation thereof to the re
.
'
26. In a transmitting system, a transmitting
device, a receiving device, means for starting and
operating said devices in synchronism, means in
the transmitting -device for transmitting a signal 5a
to said receiving device during a single rotation
thereof, means in the receiving device for re
ceiving said transmitted signal and for send
ing back a corresponding checking signal dur
ing a single corresponding rotation thereof to 55
the transmitting device, means for recording said
checking signal upon receipt thereof, means for
delaying the recording of said transmitted signal
for an interval, and means operative in case a
special signal is transmitted from said transmit 60
ting device for disabling said delaying means so
that further transmitted signals from said trans
mitting device are thereafter recorded upon re
ceipt by said receiving device.
27. In a transmitting system, a transmitting 65
device, a distant receiving device, means in the
transmitting device for transmitting distinctive
signals to the distant receiving device, means in
and operating said devices in synchronism, means . the distant receiving device operated in response
in the transmitting device for transmitting a to the receipt of said transmitted signal for send 70
signal consisting of a series of impulses during a ing back checking signals varying in accord
single rotation thereof to the receiving device, ance with the signals received to the transmit
means in the receiving device for receiving said ting device, and checking means operative only
transmitted signal and for sending back a cor
in case the transmitted signal disgrees with the
responding checking signal comprising a series corresponding checking signal.
75
@181,163
28. In a- transmitting system. a transmitting
device, a, receiving device, means for starting and ’
operating said device in synchronism, means in
the transmitting device for transmitting acude
of impulses to the receiving device during a sin
gie cycle thereoi', means in the receiving device
responsive to the receipt ot a code o! impulses
for transmitting back to the transmitting de
vice a code of impulses corresponding to the code
received, and means in the transmitting device
controlled by both codes of impulses and oper
ated only when the codes do not agree.
HA'iROLD C. ROBINSON.
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