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Патент USA US2124449

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July 19, 1:1938.
12,124,449 `
Filed 0G13. 22, 192.7
- 2- Sheets-Sheet 2
mh ,
Patented July 19, 1938
'PA-TENT ormone:N
Archibald G. Shaver, Chicago,- Ill.
Application >October 22, 1927, Serial No. 227,932
(Cl. 246-8)
a system embodying the other features enumer
'I'his invention relates to an improved system ated, by 'which the dispatcher can give'notice
for operating` trains on a railroad, combining ' to a train to ~take siding and be advised that such`
safety and economy through the provision of
has operated.
`means to save time in operation and to keep > means
A further object is the providing> of signal pro- 5
trains moving.
' 5
The prevailing practice in railwaytrain oper
. ation has been to provide. a time card scheduling
the rate of movement for all regular trains and
the rules governing the procedure in the oper
tection, under the control of the dispatcher, at a
track switch, to not only stop'the train from fur
ther -main line movement but to protect it
against any opposing oncoming train.
In such y
display of the signals by the dispatcher he -is 10
ation of trains. In the cases of special instruc
-advised .by appropriate means that the signals
'110 tions
for, trains these are usually in the form of `have operated.
written orders transmitted to the trains enroute
` through local telegraph and train order 'stations
from the dispatcher in charge of lthe division or
district. These written orders are of t'wo kinds,
the “3l order” which the _train must stop tore
ceive; and the “19 order” which is passed up to
the train as „it moves by the local station, the
train only slowing down for the purpose. The
safety of trains is provided-for by a block signal
without coming to a stop, may operate the switch 15
to divert itself, from the main line into the sid
ing and failure to operate the switch properlyv
will result in the train being> automatically
Another object .is the `provision of a system
such that the siding switch may be operated by
system so that .a signalwill indicate to an ap
either‘the dispatcher or by approaching trains
proaching train whether the block ahead' is oc . and the dispatcher advised in either case _when
cupied. The location of trains is recorded with the switch operates.
the assistance ofthe operators at localstations
A further object is to provide means whereby .
who repcrt passing trains to the dispatcher. the dispatcher may, at his option, control trains
Trains about to take or leave a siding must stop, in leaving a siding. \
a member of the crew walks ahead and opens the
Another object is the provision of means giving
siding switch, the train pulls in or out of the sid
audible information to the dispatcher on the op
. ing, as the case may be, andagain must stop for.
a member of the >crew to close the switch.
Another object is to provide means whereby
when the take siding signal is displayed the train,
In the performance of. these various functions
in operating trains as above outlined, consider
able timeis lost and considerable expense is in
volved which it is proposed to save in the present
invention, and the accomplishment of these re
sults is'the general object of the invention.
Another object of the invention is the provi
`~ sion of means' whereby a member of the crew on
the rear of a train may get-into communication
40 with a member of the crew at` the head end of
Athe train and vice versa, and whereby the vdis
patcher may communicate with the train at will,
by telephone or otherwise, while the train is
standing or _in motion, thus making loçal oper
' ators unnecessary for the transmitting of orders,
and may be telephoned to by one of thecrew, at'.
Another object of the invention is the provi
sion of means in a ‘system such‘as described,
whereby the dispatcher may informhimself as
. 5o
to the location,-direction of movement and ap
proximate rate of travel of any train in the dis
„ trict, thus making operators at local stations un
necessary for transmitting such information.
vA further object is the providing of means inl
eration ofthe controlling instrument governing.v 30
l the signals or switches, or both. ..
‘Another object is to provide an arrangement of
apparatus such- that when the' signals have
cleared, the siding switch must be in a certain
position-agreeing with the cleared signal.
Another object is to provide an arrangement
Twhereby the dispatcher may operate certain sig
nals at the switch, after which he may then
restorethe arrangement to its normal condition, ,
without the necessity of operating the switch. - 40
An additionalA object- relates to the arrange
ment of means whereby, when the route is set '
for theA trains .to proceed into the siding, any
train control restriction existing is cancelled.
- Other objects of the invention will appear in
the description of the preferred embodiment 'of
the invention which follows:
Figs. l and 5 are diagramma c illustrations of
the system, the latter figure being a continua
tion of the former.
Fig.- 2 is a detail of the arrangement of the in
ductors and connected telephone apparatus on
the trains, for the communicating system.
Fig. 3 is a detail of the connections on the'track
for the communicating system differing in some 55
respects from that shown in Fig. 1 in that re
sistances are shown around the insulated track
joints instead of condensers.
Fig. 4 is an illustration of an apparatus for
opening and closing certain circuits in a selector
system, and
Fig. 6 is a modification of the main telephone
circuit or a part thereof.
and i9, so that the dispatcher-’s instrument SQ
will register, for example_“1”_, all the other re
sistances R2 and R‘I being in circuit. With a train
in track circuit S2, resistances RI and R2 4are
shunted from the circuit by contact 2 closed and
conductor I‘I and instrument SQ willl read _“2”;
with a train in track circuit S3, resistances RI,
R2 and R3 are shunted from the circuit by con
. tact 3 and instrument SQ reads “3”, etc. With
stituted that the dispatcher may determine the a train in track circuit S6 all the resistances
location and direction of travel of theltrains, and are shunted from the circuit by contact E but R1
The system consists generally of a complete
train ` protecting and operating system', so con
may talk by telephone directly with the at
tendants on the train, without the necessity for
15 intermediaries or station operators, in issuing
orders and instructions; the attendants on the
front and rear of a train may communicate with
each other and with therdispatcher at will.
The dispatcher may give verbal instructions to
and instrument SQ will read “6”.
Instrument SLI (Fig. 1) is represented as a
relay controlled by the dispatcher’s selector sys
tern. CB (Fig. 5) represents a selector key mech
anism in the dispatcher’s oftlce for controlling a
selector along the railroad. Each key controls
the sequence of impulses required in the code for
the train attendants to take the train in,on> a ‘ operating the selector .with whichit is aligned.
certain passing siding to allow another train to B3 is the source of energy for the impulses'which 20
pass. Having done. so’, he mayv provide a check are sent `'out in the operation of the selector keys
on these instructions in the way of the display of to control the various selectors. The station
a take siding signal. Additionally, he may >set the group instrument SQ and the road group instru
25 signals for each direction at the track siding
ment RQ are located in the dispatcher’s, omce.
switch so that the two trains will be protected, Normally they are out of circuit, but either canv _
each against the other. A train receiving in-- be inserted in’the circuit by operation of its re
`spective button |35 or |36.
structions to take the siding, may operate the sid
If the dispatcher desires to know if there is a
ing switch from the train as it moves along.
Failure to operate the siding switch will result in train at station X, he operates the appropriate
an automatic application of the brakes to stop selector code to energize SLI to close contact I3.
the train, through the operation of train control He then pushes button |35 which connects instru
means as will be hereafter explained. Should the ment SQ in the circuit. By the indication of the
dispatcher deem it advisable to operate the siding ' - pointer SQ he can tell if there is a train at station
35 switch himself he may do so.
X and the track circuit in which it is located.
In Figs. 1 and 5 the signal system indicated is If the indication of SQ changes from 2 to 3 to 4, 35
that in general use on the railroads,” preferably etc., the dispatcher knows the train is travelling
If the indication of SQ changes de-of the type 0i’ automatic block signals. For con l toward
venience and flexibility in operation, the annunci
40 ator or novel trainl indicator system is vdivided
into two parts-one (the station group) embrac
ing the tracks included within the limits of the
passing track, and and the other (the road group)
. comprising the stretch of trac-k between two/_ad
45 jacent stations as X and Y.
The station group includes the track circuits SI
to S6 inclusive (Fig. 1) with corresponding relays
PI to P6 inclusive. The road group includes the
track circuits CI to C'I inclusive (Figs. 1 and 5).
creasingly from 5 to 4 to 3, etc., the dispatcher
knows the train is traveling from Y towards X.
If the indication of SQ changes from 5 to 6 to 1,
the dispatcher knows the train is entering the 40
siding passing over sections S5, S6 and SI and
moving away 'from Y. By noting the rate of
change of indication of SQ and knowing the.,
length of the track circuits, the dispatcher can de
` termine the average rate of speed at which the '
train is traveling.
Considering the road group, th‘e aryangement
of the circuits and the operation are'similar to
those explained for the station group at X. For
example the track circuit sections CI, C2, c. . .. C'I 50
are each provided with correspondingly num
bered relays TI, T2, . . . T‘I, controlling resist'
ances QI, Q2,
Q1, said resistances being nor
mally in series with instrumentRQ, when con
tact 28'and the switch I 36 are closed, and with 55
battery B2. If the dispatcher desires to know
if there is a train‘in any of vthese sections'he
average speed,`
`vConsidering the stationgroup,- as at X, the train
position indicating circuit normally comprises
, battery BI, resistance R'I, conductor I 2, resistance
R6, conductor II, resistance R5, conductor I0, re
sistance R4, conductor L4, resistance R3, con
ductor 9, resistance R2, conductor 8, resistance
RI, conductors 'I, DI and |30 (Fig. 5), contact
I3| normally open, conductor |32, indicating in
strument SQ, conductor |33, contact |34 normally
70 open, conductors D3 and I4, and contact I3 nor
operates the selector key mechanism to energize
SL2 (Fig. 5) and closes contact 28 and observes
the pointer of the instrument RQ which indi
cates the location' and direction of travel of -the
As shown there is a battery as BI, B2 etc.,v for
each group. If so desired, the source of_ energy? 65
may be located in the dispatcher’s ofllce and
only one will- then be required, and not one for
each group.~
f y
Having located thetrain, which may be' mov
ing or standing still, the" dispatcher is able to 70
getI directly in communication with the crew
mally open to battery BI. In parallel with re
sistance RI is back contact I vo1' track relay PI.
With contacts I3, I3I and |34 closed and a train' to communicate orders and information.
Figure 2 represents the train telephone system
in track circuit SI, resistance RI is shunted from
75 the circuit by contact | closed and conductors I6 provided to permit communication bëtween the
front (locomotive end)'and rear (caboose end) 75
in itself, and the receiving inductor on the train
of the train. A- andÜB may each be- considered receives the intermittent current -carrying >it to the
l as combined telephone transmitting and receiv
ing-,sets on the locomotive and caboose respec->
receiver. The communicating current is received
into and transmitted from the track rails, and the
ftively. 25ß-25l and> 2524-259 represent induc ' circuit just described is in reality an intermediate
tors connected with the telephone sets A and B
_respectively and so located on the train as to ride
close tothe track rails. In the case ‘of attendant
or carrier circuit for the territory including sec
tions C2 and C9. Assume the trainis moving in
the direction from X toward Y; when in section
at A talking to attendant at B, the voice cur
rents `set up in the inductors 250 and 25| are
in the same directions and are induced into the
track rails in the same direction. The currents
C4 relay T4 is dea-energized opening contact 19.
The vintermediate circuit is therefore extended
ahead of the train and is the same as above de
set up in the track rails affect the inductors
252 and 253 and aretransmitted to the receiver of
B. The operation is reversed in the case of B
talking to A.
In Fig. 2 the pairs of inductors at the front
and rear ends of the _train are shown connected
scribed, except the circuit is no longer complete
through contact 19, but is complete through con
ductor 93, primary Pr of transformer TF4, con-. 15
ductor 92, contact 9|, conductor 90, condensers K,
conductors 88-89 and track rails back to the
conductor connections 154-65. After the train
in parallel. Itv should be'understood they may
also be connected in series. While I have 1desig
clears the track ‘section C4, it is then -in the`
intermediate circuit for district C5 and-C6, com- 20
prising, track rails including condensers C around
insulated joints, conductors 16 and. 11 connect#
ing through condensers K to conductor 19,'
contact 19 again closed, conductor 80, primary
communication and transmission of impulses for ` P of transformer TF3, conductors 8l, D3 and 25
both audible and visual indications.
93, primary P of transformer TF4, conductor
I shall now describe the roadside features of 92, contact 9i normally closed, conductor 90, and
the system and how the roadside and train fea
conductors „and 89 connecting through con
tures co-operate. There are a series of local densers K to track rails. Communicating im
nated this system specifically as a telephone sys@
tem, it sho d be understood that the same gen
eral- metho may be used forother forms of
intermediate circuits along the railroad, forming
what may be termed a travelling >circuit or zone
.30 for each train. They comprise the track rails
and a line conductor, the two being suitably con
nected together at intervals; and a transformer is
included that the dispatcher may connect his
telephone system in circuit as he desires. _As the
35 track rails are divided into sections for track
pulses frorn and to the inductors on the train are 30
now carried in this circuit instead of in the en
larged circuit for the two districts C2-C3 and
C5-C6 as heretofore explained.` It will be ob
served, therefore, that
the train carried induc- '
tors are always within, and in inductive relation 85
with, an intermediate circuit. which is, in effect, a
circuit or zone traveling with the train, and
circuit purposes, the sections being separated by which, for convenience, I have designated atrav-l
insulated joints, it is considered desirable that eling intermediate circuit or zone. This arrange
means. be provided for conducting. the communi ",melnt is especially advantageous for rear end
cating current around the insulated joints, hence head end- communication in that communication
the condensers C are used at all the insulated Ábetween the two stations on' the different parts
joints, or the resistances r may be used, as shown of the train may be maintainedv continuously, as4
in Fig. 3.V Insulated track joints, under usual
service conditions, are of lowv impedancefor tele
phone-currentsl The few usually occurring in
intermediate circuits of moderate length are not
the train operates through the equipped territory`,~
an appreciable obstacle to the flow of voice cur
or a stretch of railway, each may be maintained
in _a communicating zone of its own that com
rents. However, under certain track conditions,
‘and with intermediate circuits `containing a con
siderable number of insulated joints, or for types
of communication requiring more ‘current than
telephony, current flow“ toî the receiver is im
proved by providing means to conduct or bypass
the communicating lcurrent around the insulat
ed joints. Condensers, where used, pass the com
municating -current, ,which is intermittent in
character, but provide a barrier for thevcurrent
which is used -for track circuit purposes. Re
sistancesused around‘lns'ulated joints are of a
character to offer small impedance to the com
municating currents, but obstruct the liiow of
the track circuit current.A
One typical district of this intermediate circuit
comprises track rails at circuit CI, conductors 94
and 65 connecting through condensers K to con
ductor 66, contact 61 normally closed, conductor
68, »transformer primary p- of TF2, conductors
69, D9 and 9|, primary P of transformer TF3,
conductor 89, contact 19 normally closed, conduc
tor 19, condensers K'and conductors 19 and 11
connecting to‘track rails in section» C4 and then
70 via 'the track rails and- conducting medium
insulated joints 4c: sections C9 and C2 to`
section CI;4 In communicating, the transmitting
inductor on the train induces intermittent current
into this intermediate circuit, which is complete
and yet confined to the zone in which the'train '
operates. It is obvious that for a'plurality of
trains operating _within the' ,equipped territory,
munication may be carried on between stations
on different parts of said train or between said
train and' a wayside station, without interfering
with the communication of other trains in the
same territory. It may be further noted that
where trains operate within the same communi
cating zone, for example, when passing at siding
locations, they may communicate with each other
in the same manner as where communication is_
carried on between >the rear end and head end of
a train. 'I'his is of advantage from the stand
point of safety and eiiicient train operation.
‘ When the dispatcher desiresto- communicate
with a train, he operates the appropriate selector
in his telephone system to cut himself in on the
intermediate circuit. For example, with a train
inthe intermediate circuit described, he may op
erate selector SL4 to closel contacts 12 and.”
which connect the leads 10
ondary s of transformer TF2 directlyon‘to dis- l
patcher's telephone line, conductors DI and D2.
He is then in position-to talk tothe crew in'both -
the front end and rear end of the train, and
they-can talk to him. When' through communi- A
cating‘with `the train he again operates his selec
tive apparatus and disconnects the intermediate
circuit from his telephone line.
It is desirable that the communicating currents
-have the samecharacteristics in both track rails.
The connection of the line part o1' the intermedi
circuit is made to the track rails through con
5 densers K in order «to make both track rails as
nearly like. one conductor as possible for com
municating purposes, yet to cause no interference
with the proper operation oi’ the track circuits.
10 The communicating current is intermittent/ or
alternating in character. Its direction at any
instant in the two track rails, when induced
therein, is the same. From the track rails the
communicating current passes through the con
\ densers K and the cross conductor and trans
This dispatcher circuit Dl, D2 may be a commer
cial telephone circuit whereby passengers on a
passenger train for example, may carry on con
versation with parties in distant cities‘and viceversa.
In the case of a train taking a passing siding,
the dispatcher may give such instructions through
the display of a "take siding” signal IIB; or he
may display this signal in addition to having
given >the traincrew written or _verbal instruc~ 10
tion. He may lalso set the signals at the switch
as H9 and H I0, in the stopcondition to close the
main line to the train required to take the siding
andto stop any opposing train from proceeding
15 former at one end of the intermediate circuit to
by the fouling point of the main line and the 15
siding. He may also open the circuit for signal
the conductor D3 and thence back through the
cross conductor, transformer and the condensers
K at the other end of the „circuit to the track
HI2 to hold that signal at stop so that a train
rails, thence -through the track rails -and the by-`
passes thereon at.` the insulated joints. When the
dispatcher talks to the train, communication cur
standing on the siding willbe vheld there until
permitted to move out on the main line. '
rent from his circuit, conductors DI and D2, is `
and Hill may be either the light or semaphore
induced into the intermediate circuit at the
transformers, as TF2, and passés through the in
termediate circuit as above described. This com#
munication current in the track rails is reinduced
into the train carried inductors and carried to the
type and the circuits include the usual features
as described below. Both signals H9 and H|0
govern along the main line and both are in the
stop position with switch SW open. 'I'he control 25
The “take siding” 'signal and the signals H9 20
for light type and semaphore signals is much the
same in either case. For convenience semaphore
signals are shown
a; the switch and the “take
siding” signal is a sign operated by the same sort
ate circuit and thence through the transformers,
V as TF2, into the dispatcher’s communicating cir
cuit, conductors Dl and D2, and receiver.
A chief vvalue of this communicating system lies
4 `:is in the ability of theconductor in the caboose at
oi’ mechanism as the semaphore' signals. Nor 30
mally, the “take siding” signal is withdrawn from
display, and the signals H9, HN. H|| and HI2
are in `a condition to operate- the same as in
any automatic signal system. K
By operating the controllingV instrument SD,
shown in Figs. 4 and 5,l the control energy is cut
the train, thus having an understanding atl all
- .C6 and C5 as indicated by _the broken line 201.
In the case that the signal system is an auto
getting it over the railroad.
Another chief ’
ing system lies in the facility with> which the dis
patcher may communicate with a train to change
its instructions, warn of dangers, and the like; all
tending to facilitate the movement of the train
and increase its safety.
If it isy desired to
on' for the display of the “take siding" signal
and the placing of signals H9 and H| 0 at stop.
Relays N9, NIO, NII and N|2 are the control
relays for _the signals H9, H|0, H|| and `HI2 re 40
. spectively. Control
relay N9 is, controlled by
track circuits C9, C9, etc. >through the block as
'indicated by the broken line 209. Control re
lay N|0 is controlled by the track circuit C9, C1,
times as to the conduct of the train, such as mak
matic permissive system (APB) relay Nilv would
be controlled by trackcircuits C9, C1 and C9 for
following train moves but for .opposing or head
on train moves, it would also be controlled bythe 50
additional track circuits C5, C4, C3, C2; Cl and S5. Control relay N||, as indicated by the
broken line 2|0, is controlled by the track cir
cuit C9. Control relay Nl2, as indicated by the
broken line 201, is controlled by the same track 55
circuits as control relay N I0. The blocks for the
signals H9, H|0, H|| and HI2 correspond to the
territory covered by the track circuits control
`l-ing the respective control relays i'or these sig
nals. With the controlling instrument SD (Figs. 00
of signals H9 and Hlll'occupied, relays N9 and
4 and 5) in` its normal position and the blocks
. N|0 are de-energized.
secondary is connected through leads 20| and
The1controlling instrument SD, comprising a
206 th?ough the back contacts 202 and 205 of a v series ofcommutator segments or contacts, con--v 05
relay R , direct to the dispatcher’s circuit DI, trols electric circuits through electromagnets
_ D2 through conductors 209 and 204. The relay operated by‘selectors SL'I and SLS. 'I‘his is '
RC may be either a track relay, such as T| and shown in detail in Fig. 4, where |55 and |99 are
70 T2 etc., or a relay such as the,.control relay of electromagnets which are in_local circuits con
the signal system which is itself controlled by the trolled by selectors |9| (SL1) andi-19 (SL.) re
track relay or a' plurality oft/rack relays. 'Asthe
train progresses from Aone section to another,
it is always connected to the lines DI, D2 through
7| the de-energization oi' the corresponding relay.
Commutator segments |00, |0|, etc., are lo
cated on the same shaft with the ratchet vwheel
or gear |54, and as shown have‘six positions;
though they may have any number of positions 75
SW cannot be operated when track section C8 is
from two up as required. When magnet |55 is
energized, armature |66 is raised, lifting arm |51l
-which impinges on the ratchet wheel |54v turning
rl'he switch sw is operated by the mechanismSM through control exercised from an approach
it and commutator segments |00, |0|, etc., coun
terclockwise to the next position, thereby re
ing train or by the dispatcher. The arrangement
of apparatus and circuits for. the control of this
taining a circuit closed',»or opening a circuit, or
closing a circuit, whichever may be considered
switch from a train may-be that shown in my
` necessary.
application Serial No. 198,824 filed June 14, 1921,
When the selector |6| is operatedv
now 'Patent No. 1,913,129, granted June 13, 1933. 10
Il -and I2 are the track inductors for the switch
operation, and other similar parts here shown
by the dispatcher, it closes its contact |62 for a
10 short interval of time, energizing electromagnet
|55 from battery |63 through contact `|62,' con
have the same numbers herein as 1n the applica
ductor |53, electromagnet coil |55 and conductor vtion referred -to except thc prefix A is added.
|65. Each time the dispatcher operates selector Relays ARA and ARS v‘are normally deencrgized,
|6I', electromagnet |55 is energized stepping com' i and in circuit connection respectively with the
coils of inductors >1|v and I2._ The circuit con
15 mutators |00, |0|, etc., around to another po
sition, until the ñrst or normal position is again necting »the inductor Il with relay AR4 includes
inductor Il, conductor A|3 (indicated broken in
I ' returned to.
Electromagnet |69 with its 'armature |1| and Fig. 5), coil of relay ARA, conductor A|2 (indi
arm |10 is similar to electromagnet |55 and re
cated b‘roken),`contact AM normally'open, and 20
20 lated parts and is for the purpose of moving
conductor All connecting to the other, end of
ratchet wheel |54 and connected commutatorsv
|00, |0|, etc., clockwise. After commutators |00,
|0|, etc., are moved 'counter-clockwise to some
the coill of inductor 1|.
When a train enters
track section C1, >track relay T1 is deenergizcd
closing contact AH. A predetermined time must
elapse after the-closing of contact A|1 before 25
i position as 2> or 3 to accomplish a particular
25 purpose, it may be desirable to return them to
normal position by a reverse movement and not
time relay ARB, which is in a .circuit energized
:by battery ‘AB3 and controlled by contact AI1,
complete the cycle >of movements. Where suchl closes contact AM. This predetermined time is
is the case, the dispatcher will operateselector
|16 energizing e'lectromagnet |69 from battery
equal to the time which must be consumed by
the”train, after entering track section C1, before 30
¿the train carried inductor comes into corre
|63 through conductor |11, contact |15, conduc
tor |12, electromagnet coil |69 and conductor
|16.v The energizing of electromagnet |69 steps
spondence with the roadside inductor 1| in order
to be effective in energizingr the circuit of the
commutators |100, |0|, etc., around clockwise, and »latter including relay ARA. This time interval
thus they may be returned to their normal po
may be varied through adjustment of the time 35
Vrequired for instrument AR3 to close its contact
AI4. Since inductor I| is located in proximity
of devices may be provided- in the-system as to switch SW and the train must approach in
shown in Fig.`5, counter-clockwise movement of ductor Il under restricted speed, it followsrthat
In order that the proper sequence of operation
'provided for clockwise movement such that com
mutator‘ segments may be returned to normal po-`
the speed of the train cannot be excessive over 40
the switch SW into the siding. When a train
is in the track circuit section C1 approaching the ‘
switch SW and it is desired to set the switch to
sition but clockwise movement cannot be had be
divert the train into thev siding, the engineman
tion 1.
closes~ a circuit on the train energizing an in
ductor attached to the train. On correspondence
commutator segments |00, |0|, etc., is provided
40 lwithout restriction, but a' stop (not shown) is
yond that point, as advancing position 6 to posi
`Commutator segments |00 to |08 are shown in , of the energized train carried inductor with the
their normal position, which may be considered inductor 1| the circuit of the latter isv energized
as position 1. The operation `of these segments causing the' relay ARA to close the contact'A25.
as shown, to accomplishthe'purposes desired in When a train on the siding desires to come out on
of the train carried
50 controlling functions is -counter-clockwise and in4 `the main line, the energizing
order positions 2, 3, 4, 5 and 6 if the complete .inductor will, on correspondence ‘of the train
cycle is followed.
inductor with inductor I2, energize the circuit `
-Normally the commutator segments » control
circuits as follows: |00 keeps circuit for control/
NI2 closed in positions 1 and 5 and- open in
its relay
other positions; |0| keeps circuit for control re_-.-
lay, N9 'closed in positions 1 and 2 and open other
|02 keeps circuit for control relay N|0
closed in positions 1 and 2 and open otherwise;
so |03 keepscircuit for control relay |23 (take sid
ing signal) closed in positions 1 and Z'andlopen
otherwise; |04 closes circuit for bell-|09 in posi
tion 3 but keeps it open. otherwise; |05Y keeps
circuit for track switch vcontrolling relay AR6
65 closed in all but positions 2 and 6; |06 closes cir
cuit of controlling relay AR6, around stick ‘con-1
' tact A29, momentarily when moving between po
of the latter causing relay AR5 to energize closing
ydetails of the operation of 55
its contact A26. The
the switch, due to the closing of. contacts A25
and A26, will hereinafter be explained. '
AR6 (Fig. 5) is the control relay for' operation
of the switch mechanism. SM.. When energized 60
it opens the switch. When de-energized it closes
the switch.
Normally it is de-energized.
normal stick circuit comprises battery B4, con
tact A29 open.. conductor A2|, coil of relay AR6, `
conductor A22,~commutator segment |05 posi
tion 1 closed, relay contact A23 closed and con
ductors A24v and C to battery. In this condition,.
.the closing ofl either contact _A25 or A26 from
train carried means, which contacts are in mul
tiple with'stick contact A29, will energize relay
sitions 3 and l4; |01 keeps circuit for bell |29- AR6 and cause it to remain energized `because 70
closed in positions 3, 4 and 5 but open otherwise; of’the sticking of contact A29. The operation of
|06 keeps circuit for transmitter ||0 open in po-_l commutator contact |06, which is closed for a
sition 1 but closed otherwise.
Signals H|| and H|2 can operate to 'indicate
clear only when switch SW is open, that is for
75 train movements to and from the siding. Switch
short interval of time in the movement of seg
ment |06 from position 3 to position‘4, will ener
gize relay AR6, since this` contact |06 is also in 75
ß, 124,449
multiple with stick contact A29.` The circuit in
volved in the closing of contact |06 comprises
battery B4, conductor A11, contact |06 closed.
mon conductor C. Under such conditions, bell
|09 may continue to ring in the transmitter || 0
-until the approaching train gets into track sec
tion C6, when contact ||6 is opened and the bell
stops ringing.
closed, contact |05 closed, conductor A22, con
15 tact A21 closed on itsi’ront point, conductor A3l,
circuit contact A32 associated with stop signal
H9 closed, switch mechanism SM and conductors
A30 and All. This circuit- closed causes the
,switch SW to be opened for the siding. With
To indicate to the dispatcher that signal HH
has cleared, the bell |29 rings when in the closed
circuit comprising common conductor C, *com
mutatorcontact |01 closed in‘positions 3, 4 and
5, conductor |21, bell |29, conductor |28, front 10
contact |43 (of relay N||) closed, conductors
A30 and A|1 and b'attery B4.
The transmitter equipment ||0 is connected
to dispatcher’s telephone line conductors DI and
D2 by commutator segment |08 in all positions
except position 1. |49 is a switch for connect
relay ARB de-energized, the circuit for mecha
nism SM, to close switch SW for the main line
A movement, comprises battery B4, conductors C
and A24, contact A23 closed, contact |06 closed,conductor A22, contact A21 closed on its back
point,’conductor |19, switchV mechanism SM and
conductors A30 and All.
or other person wants to talk to dispatcher.
Near the switch SW is a cylinder |58 in which
is a piston connected to said switch by rod |59.
|80 is a pipe leading to whistle »|50 (shown
groupedwith the bells and the transmitter H0).
When the switch is moved, the piston moves with
'I'he switch mechanism
it, either forcing out or- drawing in air through
whistle |50 causing same to sound in 'transmitter 25
-| |0 every time the switch is moved and thus sig
nal the dispatcher. 'I'his piston may be connected
with the means locking the switch so as to sound f
every time the switch is locked in positiom
. A
Gongs |61 and |68 (Fig.` 4) are sounded for
the operation of electromagnets |69 and |55.
When armatures |1| and |66 return to their nor
mal position, after being raised by their respec~
tive magnets to step the commutator segments
around, they tap the gongs |61 and |68 respec 35
It will be noted that the signal H9 must be in
the'stop condition and track section C8
tively, thus advising the dispatcher of the opera
tion. As these gongs- are of diiîerent tones, the
dispatcher can tell which electromagnet is oper
ated and in which
the commutator ls'
This Fig. 4 illustrates the arrangement of in
struments which may be used for. SLI, SL2, etc., ‘
_up would always be in the same
direction, as counter-clockwise. Instead of the
Normally relay |23,
take siding signal IIS, is (Fig. l) whichl controls
energized from common
conductor c, conductor |22, relay coil |23, con
ductors |24
arrangement of commutators for SD all in one
shaft, with a selector for each direction of ro
tation, I may prefer in some cases to operate part
of the commutators
those controlling the switches, on another shaft
55 tact |03 being shifted to
ment SLT is operated, battery B4 is disconnected
controlled'by another selector, the rotation being
in one direction in each case.
Should the dispatcher desire information as
- from relay |23, which becomes de-energized open
ingl its contact ||6 and
a part, causing the "take siding”
signal ||6 to display. Also contact
connecting battery ||9 to conductor |26 and to
shouting the number of the train into the trans
mitte: ||0 as the train passed by. By setting the
While the commutators |004 are in the nor
conductor C, conductor |26, bell |09, conductorv mal position the various signal control relay cir-
70 |31, back contact |38 closed, conductor |42, back
fcontact |40 closed, conductor |20, commutator
contact |04 closed in position 3, conductor |26,
which is normally a part of the circuit for relay .
|23, back contact |2| closed, contact ||8 closed
f75 of track relay for section C6, battery ||9 to com
2, 124,449
switchí‘SW is open 4(set for the siding), relay coil
NI2, commutator contact |00, and thence through
7 ,
stop closing circuit controller A32, to divert the
train on to the siding as heretofore explained.
On the switch reaching the open or diverting
the front'contacts ofcvarious track relays for the „ position, circuit controller contacts A41, and A“,
which are' normally open, are closed in the cir- ,
cuit of relays N |2 and N|| respectively;l and cir- v
track sections constituting the yblock for the sig
nal, in this case section C8 to C5 inclusive. The
circuit of control relay N|0 begins'at common
wire C and passes through relay coil NIO, switch
circuit controller contact 2li closed when the
switch SW is closed, commutator'contact |02,
and thence through the contacts oi various track
relays the same as
cuit controller contacts A39 and 2| l, which areA .
normally closed, are openedl in the circuits of relays N9 and DIN-respectively, as 4soon
>switch SW starts to open. VAs indicated `by the
broken line 209; these ,circuit controller.v contacts
for NIZ. l The circuit for con- > are connected to the switch and operated thereby. -
' trol relay N9 begins at common wire C and passes
control relay
closing of contact AM' permits
through the coil N9, commutator contact |0|, `The
N|| to energize clearingsignal H| | 'which is the
switch circuit controller A39 `closed when the authority for the train to proceed into the sid
switch is closed, conductor A40; contact A28. ing. As the train enters track circuit section C8, c
closed when relay ARE is deenergized, and thence '
T8,.which controls the circuits of control
through the front contacts- (not shown) of the relay
NIO, N|| and N|2, (circuit contacts not
various track relays for the track sections of the
5), is deenergi'zed, opening the .
in Figure
block as C8, C9, etc. The circuit for control re y - shown
circuits of these relays and consequently'placing 20
lay N|| begins at common wire C and passes signal
H|| at stop. Also, with the deenergiza
through coil of relay N||, back contact closed . ‘tion of relay T8, contact A23 is opened in the
when relay N9 is deenergized, switch circuit con
switch operating circuit, making it impossible
troller contact AM clos'ed only when .switch SW `for the switch SW to be operated while any
is open (set for the siding) and »thence through
of `thetrain is in the track'section circuit C8, .25
a contact (not shown) of track relay T8 to part
and relay AR6` is deenergized. After its first
energization due to correspondence of train in-_
'A considerable variety of train operating con
ductor lwith wayside _,inductor, relay ARS was"v
ditions may be taken -care of with-this system kmaintained
energized v`"through its stick contact 30
and some of them will now be explained together
the train clears the limits of .track
with the procedure-in each case.
section circuit C8 in the siding, relay T8 i's again
Assume two scheduled trains are to meet and l energized closing its contact A23. Since contact
pass at station Y and that the train coming from
station X is to take the siding while the train
bound toward station X’keeps the main line.
'I‘he latter, if it arrives first at station Y,vs'tops `on
the main line before passingy signal H|0. The
l train which is to take the siding and which must
be runningl under the prescribed speed, operates
'A27Y is now closed on its back contact, mechanism
SM is operated automatically returningv thev
switch VSW to its normal or closed position, the
circuit therefor being heretofore explained.
With the start of the closing of switch SW, switch
circuit controller contacts A41 and A“ are opened
`and with the completion of the ~closing of switch
the'switch in the usual way as heretofore'herein
and 2|| are closed.- The clos
explained and as also explained in my applica - SW, contacts A39
2|| permits relay N|0 to energize,
tion Serial #198,824. When it has cleared the
the track section circuit relays in its
main line, including the limits oftraok section providing.
circuit are all energized andthe circuit is other- .
C8, the switch SWreturns to normal position,
signal H|0 ‘clears automatically and the train on wise closed; and consequently signal‘H|0_ clears
the train bound toward X to proceed
the main line proceeds to X. It is noticed that ' .authorizing
each train takes v‘care o_f itsell"l in this procedure on its way. In the making of this meetingpoint,
X was late so as not - '
and the dispatcher is not necessarily involved. if the train bound towards
at --stop `for train taking .
As the train bound toward X approaches station to= have placed signal H9
have beenvplaced at
Yi, it enters the block of signal H9; including siding, this signal H9 would
energizing' of relay ARG, l
track circuit `vsections C9 and C8, deenergizingv stop nev'erthelesshbyN
back contact A28, as a consequence of
control relay N9 which in turn sets signal H9> at 'opening
the wayside inductor being energized from the
stop and holds said signal in the ¿stop condition train carried inductor for opening the switch.
so long as any of the track 'circuit sections> C78,
A32 connected with the
C9, etc. are occupied by the train. .As the train , By this means contact
H9 would be closed- permitting
bound toward Y passes signal H3 if the auto-' 'operation of signal
« i
‘ matic b_lock signal system is of the APBtype, or the opening of the switch SW.
Assume that- the train which is bound toward
as it enters >track circuit section C5 in case the
automatic block signal system is of the ordinary X takes the siding at Y at the other end (extreme
right hand end, not shown). The dispatcher,
or old style, signal H|0 is set at stop and remains " as a precaution, may operate his selector SL1
60 at stop so long as any of thevtrack circuit sections ' (|6I) stepping the commutators |00--`-| 08- topo
intervening between the entranceO to the block
and the signal H|0 are occupied by the train.
The setting of signal H|0 at stop is accomplished
through the d_eenergizing of relay N|0 which is
controlled by the track circuit sections referred
to. Signal H|0 being at stop, train bound' to
ward X will not pass it. Signal H9 being at stop,
train bound toward Y, which is to enter the
sition 2. ‘This opens the circuit for signal H|-2 at,
contact |00 so it cannot clear and it also opens
the circuit for relay ARG at contact |05 so that
siding switch cannot be opened by the train com
ing from X should the engineman, under a mis
apprehension, be disposed todo so. After the
train from X has cleared the switch SW on the
main line, the train on `the siding may desire t0
siding, will not pass it till vauthorized to do so. 'come out on the main line to `proceed to X. Two
courses of procedure are now open tov the dis..
70 When the train bound
circuit section C1 the engineman energizes -the
inductor on the train and reduces speed if neces
sary so that on lcorrespondence of the train
patcher. He may step commutator segments
|00--| 08 back to normal position by operating
- selector SL8 and thus let the train on the lsiding
. inductor with inductor Il the switch is operated , loperate the _switch SW, either by hand ~or from
to the open position, signal H9 being alreadyy at
the train through inductor I2, after which signal
Hl2, providing the block is clear, will clear auto
matically giving _the train the right to proceed
toward X. Or the dispatcher may decide to him
5 self operate the switch SW for the train to come
out on the ma n line, in which case the procedure
sets signals H9 and H|0 at stopbecause of the
opening of contacts |0i, and |02; causes bell |09
to ring, by closing contact |08 and opening con
tact |03, indicating that signals H9 and H|0 are
2nd. Again operate selector' SLT to step seg
ments |00.-|08 to position 4, which operation
energizes relay ARS to operate mechanism SM to
open switch SW by closing circuit in contact |06
20 momentarily
as segment moves from
'tion 3 to 4; causes whistle |50 to sound because
of movement of switch; and results in
becoming energized which, together with the clos
25 ing of contact |07,A causes bell |29 to ring, indi
cating switch isopened and locked.
3rd. Again operate selector SL‘I to step commu
tators to position 5 which operation closes con
tact |00 clearing signal H|2 and keeps bell |29
ringing by contact |01 remaining closed.
Since signal H| 2 'is now clear, the train pro
ceeds out on the main line towards X. As the
, train enters track section C8, relay N || is de-en
A ergized (circuit for this relay through contact of
track relay T8 not being shown)_ and bell |29
stops ringing, .signifying to the dispatcher the
train is proceeding in section C0. As the train
enters section C8 contact A23 is opened de-ener
gizing relay ARB so that switch SW automatically
trains are to pass, to> position I; this cuts in the
transmitter ||0 in the dispatcher’s telephone
lineyplaces signal HI! in the stop condition, sets
signals H9 and H|0 at stop, displaysv take siding
signal H5, closes contact |05 in circuit of relay
AR6 so that the track switch may be operated,
and results in bell _ |09 ringing, notifying the
at stop; and closes circuit for relay ARE at con
they shall pass and which shall take siding. He
now operates selector SLI as required to bring the
commutators |00-|08, at the siding where the
lst. Operate selector SLT to step commutator
segments |00-| 08 to position 3, which operation
tact |05.
then operates _the appropriate selectors which will
bring him into telephone communica-tion with
each train. He then instructs-the trains where
dispatcher that signals HillV and Hill are at stop
and take’siding signal H5 is displayed. One of
two procedures "may 'now be followed, the dis
patcher may continue the operation of controlling instrument SD to open the switch or he
may decide to let the train which is to take the
siding operate the switch. The latter will be the 20
usual course. Each- method of operation has been
heretofore explained. In case oi’ the switch be
ing operated by the train, the dispatcher knows
when the switch has opened by the blowing of
whistle |50 and when signal HII clears by the 25
ringing of bell |29. When bell |29 stops ring
ing, the dispatcher knows that the train which is
proceeding toward Y is in the track section C8
containing the switch. He can also follow the
progress of the train by observing his train indi
cator. After the train has proceeded into the
siding past the fouling point, switch SW auto
matically returns to its closed position, in _the
same manner as heretofore explained of which
fact the dispatcher is advised by the blowing of'
whistle |50. The dispatcher now operates selec 35
tor SLB stepping commutators |00-|00 back to
returns to normal or closed position as soon as position 1, signals H9 and Hi0‘are released and
train clears section CI. -In this operation whistle take sidingsi‘gnal Il! is withdrawn. 'I'he train
|50 is sounded notifying dispatcher switch SW which has kept to the main linewill now be at
liberty to proceed..providing the block isv clear
is returned to closed position.
During- this time contact |00 has been closed, ' 'in which case signal HII will indicate proceed.
Assume that the automatic train control system
except `in position i, cutting in the transmitter
so that the dispatcher has heard the bells ring referred to in this inventionV is of some of the
and whistle blow in the various positions and even well known types, as the intermittent induction
could hear the train Dass out. If required, a4 system of the Regan Safety Devices Co'. installed 45
member ofthe crew on the rear end of thev train for test on the Erie Railroad or the auto-manual
could shout the number' of the train into the system of the General Railway Signal Co. in
stalled on various railroads, I1, Il, ||l and ||2
transmitter, as he passes by. 4
' 4th. 'I'he dispatcher again operates the selector
SL'I which steps the commutators |00--|00 to
position 6 which opens up circuit for relay ARC
but ~serves no useful purpose in
operation. 'I‘he opening of the
point is simply to enable the dis
patcher to return the switch SW to its normal
represent the roadside inductors for such a sys
Considering I9, under clear conditions its
circuit is closedv through circuit controller ||3
_ tem.
closed when signal H9 indicates clear. Should a
train, for which the take siding'signal Il! is dis
played -and the signal Hl set at stop by the dis
patcher, neglect to open switch SW, it will be au 55
tomatically stopped by the automatic train con
condition if atV any time he should open it and- a,
trol system because with signal Hl at stopthe
train not pass through.
circuit o! inductor I9 will be open. However, if
5th. Finally the dispatcher again operates se
lectr SL'I and steps commutators |00--|00 to their the train does open the switch SW, signal HH
normal or number one position, which operation clears for the train to enter the'siding and circuit
controller Iii is operated closing the circuitfor
, leaves all signals and apparatus in normal condi
inductor Il so that the train enters the siding
without being stopped.
It is noted that in the above case the dis-v
patcher has control` over the departure of the
In the case
of the Regan system, which is a.
two or three position system, a track inductor, as 65
I9, when in a closed circuit also acts as a re
train from the siding and that the extent to'which
he takes control rests withv him.
- `
setting inductor. That is, if the train is run
ning under’a restriction,- as low speed due 4to a
previous stop inductor, upon coming into corre
Assume two trains on the railroad which are
70 nearing eachother and a passing siding to meet
and pass. It may be further assumed that
neither train knows of the other. By oper
ating his train indicator equipment, heretofore
described, the dispatcher locates each train and
76 determines where they shall meet and pass. -He
spondence with a track inductor with a closed 70
‘local circuit, the restriction is> automatically re
lieved. Therefore, if a train operating under a
train control restriction under the conditions de
scribed approaches inductor llwith the signal
HII clear for the route into the siding, it will
have its restriction cancelled as soon as it passes
'over inductor- I9, and will enter the passing
t siding with its automatic train control in normal
Assume that as a part of the trainoperating
system, especially desirable at station locations,
as station Y, the arrangement indicated in Fig. 6
is used, transformer TF being substituted for
transformer TF4, contacts 202 and 205 and con
nected conductors of circuit controlling relay RC
being substituted for contacts 96 and 91 and con
nected conductors ol! selector controlled instru
ment SLB, and relay RC being controlled by track
relay TB and track 'relay T9 (not shown) for sec
tion C9. -As the trains pass through the station
|00 opens vthe circuit of transmitter IIO produc
ing a «well deñned click which may be heard by the
dispatcher. Further, as indicating when posi
tion “one” .is reached, the gong connected with
the operating electro-magnet, either |69 or |55,
will not sound for position" “one” for the reason
that the transmitter I|0 is cut out before the
armature falls, causing the hammer to strike the
Y on thel main line or to and'from the siding in
sections C8 and C9 the relays for these sections
_ are operated de-energizing relay RC so that yits
lcontacts 202 and 205 are closed between con
ductors 20| and 203and conductors 206 and 204
gong. -In the case of the use of controlling in
strimients'of more than one step, as in- Fig. 4, 10
the selector key CB isarranged with an operating
lever such that in practice the position of this
lever corresponds with the position of the com
mutators of the Vinstrument SD. In this way a
check is provided in the dispatcher’s omce on the
position ofthe commutators of SD.
annunciator conductor
I4 may be connected di- ‘
selector SLI is operated. l‘llso,A instead ofv using 20
DI for the annunciator the >
common wire for the signal system may be used,
- dispatcher’s wire
and probably would be used in practice.-
Although the circu'ts are illustrated in con
to the dispatcher’s lcommunicating circuit, con
nection with a single track, it will of course be 25
understood that the invention is applicable to two
As transformer TF (now
substituted for transformer TF4) is a part o! the.
intermediate circuitfor section C8, C9, et'c., trains
or more tracks.
within these sections are in a position to initiate
, communicatoin with
rectly to the dispatcher’s main wire D2 when the `
respectively, connecting transformer secondary S
‘ ductorsvDI~
and D2.
Instead of using a third conductor D3, the
the dispatcher and report
What I claim is:
l. In a communicating system for railways, the
combination of a stretch of 4track for a train, a
their location. ,For example,~ the train may re
` port it is entering the'passing siding,- has entered
dispatcher‘s selective system adapted to be con
the passing siding, is leaving the’passing siding,> nected with each one of a series of intermediate
etc. The intermediate circuity for sections C8, circuits, including the track rails, and com-'
C9,_ etc., is but partly shown comprising track munication receiving apparatus on the train in
ductiveiy associated with ysaid track rails re 85
rails, conductors 88 and 89, condensers K, con
ductor 90, contact 9|, conductor 92, transformer sponsive to communicatingy energy impulses
primary P (of TF, Fig. 6) , conductors 93 and D3, originating in the dispatcher’s selective system.
etc. This Acircuit completed requires a connec
2. In a system adapted for communication be
tical in arrangement with that'shown, viz., Vcon-
4tween a railway train `and the dispatcher, the
combination comprising a dispatcher’s com
ductor 93, transformer primary P, conductors 92,
municating system,` a- communication receiving
etc., 'but located at the right of the diagram Fig.
5. The insulated joints in the track rails are>
bypassed (not shown) by condenser» C as illus
trated in Fig. 1 or by ,resistance r as indicated
and transmitting circuit on the’train, an inter
in mg. 3.:
termediate circuit.
` tion from conductor D3 to the track rails, iden
` As they relate to the dlspatchers selective sys
tem',`Figs. 1 and 5 are only schematic in the show
mediate circuit 'in inductive relation with said
train circuit, 4and. selective devices connecting thel
dispatcher’s communicating system with the in .45
3. In a system adapted for communication be
tween the dispatcher and a railway train, the
combination comprising a dispatcher’s - com
ing of instruments SLI, SL2, etc. Several sys
tems of dispatchers selective apparatus are in municating-circuit including selective apparatus 50
service on the- railroads for telephone purposes. ‘~ for any one of a series of track districts, an in
In these systems selectors are located at various termediate _circuit including the track rails for
stations with which it may be vdesired to hold each of said districts adapted to be selective con-'
conversation. Each selector is v'responsive to a
nected with the dispatcher’s communicating cir
certain coded call only. When the dispatcher
cuit, and a communication receiving and trans
desires to talk with a certain -station he causes a ` mitting circuit on the train in communicative
55 certain
code for electric impulses, corresponding
relationship with said track rails, whereby com
to the code of the selector in the station being r municatio'n may be,y had between the dispatcher
called, to be sent out over the main- circuit. The and a train on a selected portion of the railway.
selector responds by closing an >electric contact- to ,
rlng a bell to call the attendant. In‘ my inven
tion I make use of the contact on a selector of this
ping up relay or instrument like .SD already ex
connection, ay secondary coil therefor, in inductive _
close andA open circuit contacts.. In
stepping up relay of two positions,
-relation with each primary coil, a> normally open
‘ circuit from- each 'secondary coil- to said con- `
on its second operation the selector restores the
stepping up relay to its-normal' condition, causing
those circuits which were closed in the abnormal
condition` to be opened and those which were open
' in therabnormal condition to b_e closed.
On return of the'commutator segments to po
nection from th'e rails of each track section to one ~
On the ilrst operation of the selector its contact
' the case of a
itself controls electric' circuits.. of said conductors, a primary coil in each circuit 65
65. energizes the stepping up relay to an abnormal
` 'condition
stretch, conductors parallel thereto, a circuit con
_ general type to close an electric circuit for a step- >
, plained which
4. In a train- communicating system. a stretch
of track for a train, track section circuits in said
sition.f‘one”-, the normal position', commutator. ,
ductors, movable contacts and a relay connected
with each 4track section circuit controlling each 70
secondary coil circuit, a transmitting and receiv
ing set on the train having a circuit inductively _
connected with said track rails and a transmit
ting and receiving set» connected t'o said con
ductors whereby communication may be carried
‘2, 124,449
on between the train and an outside station,
While the train is running over any of said track
5. In a system adapted for transmitting energy
impulses between the two ends of a railway train,
the combination comprising an inductor in cir
12. In a means for carrying on communication
between the front end and rear end of a railway
train, a track system comprising a series of track
districts, a track circuit section in each district,
a conductor. connected to the rails at each end of
each district to form a complete circuit including
cuit with transmitting apparatus on one end of
the train, a second inductor in circuit` with re ‘ the track rails of said district and said conductor,
a relay controlled by said track circuit section,
10 ceiving apparatus on the other end of the train,
and an intermediate circuit, including the track”A and a circuit controlling contact operated by said
rails multiple with which said two inductors are relay so arranged'in the connection between said
in direct inductive relation, for conveying said conductor and the track rails that while a train
impulses between the two ends of the train.
`6. For a train communicating >`systen1 the com-l
bination comprising an intermediate circuit, of
complete circuit.
which the track rails in multiple form a part,
otherend of the train, and
track rails.
13. In a system for carrying on communication
between the two ends of a railway train or a rail
means inductively connecting said sets with said
-intermediate circuit‘through an air-gap over said
occupies the track circuit section said connection
is broken and the circuits for the two adjacent
track districts'are thrown together forming one
way train and a wayside station, an intermediate
circuit in the. track system comprising the rails
in a block signaled stretch of track, a conductor
insulated from said track rails extending along
the stretch of track, cross conductors connecting
‘ 7. In a system adapted for communication be
tween a railway train and a wayside station, the
said conductor with the track rails, and means
com ination comprising an intermediate circuit,
preventing the flow of block signaling current
from the track rails into saidconductor.
14. In a system adapted for communication be
tween a railway train and a wayside communi
'cating station in combination, a train set com
prising a transmitter, a receiver, a -source of elec- .
trical energy, an inductor and a circuit connect
ing said inductor and source of energy to said
transmitter and receiver; an intermediate circuit
inductively associated with said inductor and
a section vof track rails, a conductor
connecting to the rails at both ends of said track
sections, and a transformer coll in seriesin said
circuit; a wayside circuit connected with said
wayside communicating station; and means for
connecting said wayside communicating circuit
to another coil of said transformer.
15. In a system for carrying on communication 40
9. In a means for carrying on communication
between a.- railway train and a wayside station, a between the two ends of a railway train, an inter
track system comprising a series o_f related inter , mediate circuit in the track system comprising the
two rails in 'av section of track, a wayside con
ductor insulated from said track rails extending
along the section of track, and a cross conductor
rails at the ends of said section.
connecting each track rail through'a condenser
with said wayside conductor at each end of saidsection.
the wayside station.
16. In a system for carrying on communication
10. In a Asystem adapted for communicationA between the two ends of a railway train enroute
over a stretch of track, a wayside system com
>prising a series of .intermediate circuits consisting
of, the two track rails, a wayside conductor in
sulated from said rails extending along said
trac , and a cross conductor connecting between
said'track rails and said wayside conductor at
intervals throughout said stretch.'
17. In a system for carrying on communica
tion between the two ends of a railway train, a 60'
stretch of track for said train, and a wayside
with said wayside station circuits.
system comprising
a series'of intermediate cir- '
11. In a system adapted for communication be- I cuits consisting of, the two track
rails, a wayside '
tween the two ends of a railway train and between
conductor insulated from said >rails extending
along said stretch, a cross conductor connecting 65
between said track rails and said wayside con
ductor at intervals throughout the stretch, and
track section circuits in said stretch controlling
ductive relation with said train circuits as the
said cross conductor connections.
18. In a means for carrying on communication
between a railway train and a wayside station, an 70
intermediate circuit in the track system com- '
prising the two rails in a section of track, a way
train progresses over the railroad, transmitting
and receiving circuits for the wayside station, and
devices controlled some by the train and some
from the wayside for connecting said interme
diate _circuits with said wayside station circuits.
side 'conductor insulated from said track ‘rails
extending along said section of track, 'a cross 75
erative _in- said selective system, one of said se
conductor connecting said trackrail‘ through'a lectors being adapted to connect' said ñrst way
‘ condenser with said waysideconductor-at each
side circuit with said second wayside circuit to
determine the location of the train, and another
of said selectors being adapted to connect said
one coil .
end of said section, and a transformer,
of said transformer being in the intermediate
circuit and the other coil adaptable for connec
tion to said wayside station.
dispatcher’s >communication system with the in
termediate circuit that the dispatcher may com
municate with said train after said train islo
24, In a train operating and dispatching sys 10
19. In a system for communicating-between a
’ wayside station and a railway train, a stretch of
track, a series ofintermediate circuits for said
stretch, a selective system for the wayside sta
tion, including a prescribed selector> for each in
tem, the combination comprising, a dispatcher’s
communicating circuit including selective appa-
- termediate l'circuit selectively controlled adapted
ratus for any one of a series of track districts,
to connect such corresponding intermediate cir:V an intermediate circuit for each track district,
cuit to said wayside station, and atrain circuit
in inductive relation with each of such interme
diate circuits of said series as the train 4pro
gresses through the stretch.
adapted to be selectively connected to the dis
patcher’s communicating circuit, and a communi
cationreceiving and transmitting circuit on the
train adapted to be in inductive relation with
20. In a system for communicating between a
each intermediate circuit, whereby communica
the dispatcher and a 20
train on a selected portion of the track, and cir
bination comprising an intermediate circuit in- \ cuit means, the characteristics of which vary
cluding .the two rails of a section of track and a with the location of the train in the district oc
conductor connected to said rails at each end of cupied by the train, selectively connectable -to _an 25
wayside station and arailway train and/or >be
train, the com
20 tween the two ends oi _a railway
' tion may be had between
indicating instrument enabling the dispatcher to
said section, communication apparatus at the
wayside station, means adapted to connect the
wayside station apparatus with the intermediate
circuit, and communicating' apparatus on each
end of said train, said last mentioned communi
determine the district in which the train is lo
cated before the intermediate circuit for saidv .
district is connected to the dispatcher’s com
municating circuit.
25. In a system for communication between a
wayside station and vehicles in a stretch of track,
means for each vehicle adapted to transmit com
eating ‘apparatus being in circuit with an in
30 ductor in inductive relation with each track rail.
21. In a system fox'v communicating between
the two ends of a railway train 'on' a stretch of
the railway train and a
munications to and receive communications from
the wayside station, a
track and/or between
>wayside station, an intermediate circuit compris
ing conductors along said stretch, a transformer
wayside station means for`
transmitting communications to and receivingl
communications from said vehicles, and means
controlled from the wayside station for placing '
i in circuit with said conductors,` and -'means at the
‘ end of said stretch connecting the conductors to- ‘ -the transmitting and receiving means of said
station in relation forÍ communication with' any 40
one of said vehicles, or simultaneously with any
cuit, changing said two’intermediate circuits into several or all of said vehicles.`
26. In a system for communication between a
one intermediate circuit, andfto eliminate the -
gether, said means being ‘adapted to join said
circuit to an adjacent similar intermediate cir
wayside station and railway trains in a stretch
transformer from said first named circuit while
of track, a series of sections in said stretch each
‘ the two .intermediate circuits” are joined;
with an intermediate circuit, communication
22. In a system `for communication between thc
meansî on eachA train adapted to be in communi
two ends of a railroad train and said train and
a wayside stationfthe’combination comprising, a
cative relation with said >intermediate circuits,
a communication Zone for each-train traveling
‘ an intermediate circuit for each district,lcom-
with the train and comprising at'some times one
stretch of track for a train divided into districts,
munication transmitting and receiving means lon ' andI at other times more than onev of said inter- . 50'
each train end in communicative relation with ' mediate. circuits, communication means in the
the intermediate circuit fotone or more of said wayside station, and means controlled from the
districts as the train'travels through the stretch, wayside station for placing said wayside station
a wayside station including a communication communication means in communicative rela
transmitting and receiving means adapted to be tion with'the intermediate circuit for any one,
connected to said intermediate circuits, and or several, or all of «said trains.
27. In a railway dispatching system, a stretch
-means controlled from the station for connecting
said station transmitting and receiving means of track for ya train, including a main track and
. with the intermediate circuits for some of said
districts and means automatically controlled by
the trafin for `connecting said station transmit
ting and receiving means with the intermediate
circuits of other oi said districts.-
a side track 'connected together by a switch, and
means permitting the train dispatcher in a way
side station to communicate with the engineman
train and instructl him
on theiocomotive of said
to operate said switch and take the train in on _ '
23. In a'train operating and'disp'atching sys
tem for railways, the combination comprising, a
the sidin'g,’said means' comprising a transmitting y
ätretch of track ¿or a train, track section circuits
>the locomotive, a transmitting
vand receiving
in the wayside station,
in said stretch, a first wayside circuit controlled
by said track section circuits for locating said
train, an intermediate circuit also controlled by
-track section circuits 'of said stretch for- com
municating with said train, communicating de
vices on said train electrically related to said in
termediate circuit as the train travels over the
railroad, a secondwayside »circuit connecting to
a train locating device, a dispatcher’s communi
eating 'and selective system,l and selectors op
and receiving ‘communicating vmeans carried on 66
communicating means
and a communication zone for the train, travel
which said .wayside com-ing with the train, in
municating meansl is adapted to lbe placed in
communicative relation
with said locomotive car- '
' î
ried means by devices located within saidA zone
but controlled from said wayside station. \ l .
28. In a means for communication between a
wayside station and any one, or any several, of 'l5
a plurality of trains in a stretch of track, comprising, a circuit for the wayside station, an intermediate circuit for each of said trains, a trans-
over a stretch of track under the supervision of
a train dispatcher, means for selective operation
and communication means in the `Voflice of said
ì . former in each intermediate circuit, a relay
dispatcher, al Wayside circuit adapted to Vbe con
5 adapted to connect each transformer with said
circuit for the wayside station, and a selector
operatively associated with each relay, each se. lector being responsive to a different prescribed
nected .with said means for selective operation
and said communication means in .said oi’n‘ce,v
train locating means for said stretch adapted to
reflect the location of said trains, acommunica
electri'ccurrent to control the associated relay.
29. In a system for communication between
the rear end and thehead end of a railway train
or between either or both ends of the railway
train and a wayside station, a stretch of track
tion circuit for said stretch adapted for communi
cative relationship with said trains, and means
responsive to said means for selective operation
over said wayside -circuit to connect said train
-locating means with said office and said communi
for the train divided into districts, an interme- ,
cation circuit with said wayside circuit.
l5 dia-te circuit for each district, a transformer as-
34. A transmission system comprising in com-'
mediate circuits together during the interval that
cluding a transmitting device, a receiving device
the train is passing from one adjacent district to
20 the other, atransmitting and receiving communi-
and a. circuit adapted to be connected- to either
of said devices and in direct inductive relation
- cation set on each train end in .inductive relation
with each of said rails to induce alternating cur
with the intermediate circuit for the district the , rent therein in 'multiple when the transmitting
train isoccupyins, a -‘transmitting and receiving
device ofv that station is connected in the circuit
communication set in the wayside station, and
:.'5 means including said transformer and a selec-
of that station and to be responsive to current
flowing through said rails when the receiving de
tively operated relay,„connecting the intermediate circuit for the section the train is occupying
with said .station communicating set.
30. In a system for communication between a
vice of that station is connected in the circuit of
that station whereby transmission from either
station to thevother may be effected through a
circuit’including said rails as parallel branches
30 vehicle in a track stretch and a wayside station,
transmitter and receiver means adapted to'be in
circuit with an inductor on the vehicle, transmitter and receiver means in the waysiderstation, a
35. An end to end transmission system com
prising in combination the running rails ot a
stretch of railroad track, a train on said rails. a
' ’ latienship with said inductor, and controlling
means in the wayside station adapted to selec-
ting device, a receiving device and a circuit
adapted to be connected to either of said de
vices at» that station and in direct inductive re
lation with each 0f said rails to induce alternat
ltively communicatively connect said mediums
with the wayside station transmitter and receiver
31. In a system for communication between a
wayside station and railway- trains in astretch 0f
ing current therein in multiple when the trans
mitting device of that station is connected in the
circuit of that station and to be responsive to
track, means on each train and in said wayside . current flowing through said rails when the re
A stntiûn 1’01’ transmitting and receiving COmInUni- ceiving. device of that station is connected in the
45 ‘lation Signals, a Circuit fOr each train Within
circuit of that station whereby transmission be
which communication signals from and to said - tween the ends of the train may be en‘ected
ltl‘liin are Conñned. Aand means assnçiated With
4Said circuits and controlled from said station for
optionally placing the transmitting and vreceiv-
through a circuit including said rails as parallel
_ .
36. In an inductive train telephone system, the
50 ingA -means of said station in communicative ‘re- combination with a stretch of track including the
lationwith the transmitting and receiving means -two running rails for a. train, of a communication
of any oneaor more than' one, of said trains, said circuit associated with the stretch of track and
`a1`rangen1ent making POSSible n.00mlnl1nicati0n
electrically complete with the stretch of track
from‘said station to several trains at one time.
` 55
32. In a system forcol'nrnunication between the
either occupied »by a train or unoccupied, said
circuit comprising the two track rails in parallel
head end and rear end 0f trains on a stretch 0f
and a common return path, operative with a train
track and between said trains and a wayside station, means on each train end and in said wayside station for transmitting and receiving comC9 munication signals, a communication channel `for
each train within >which the means fer the two -
facing in either direction 'and running either for
ward or backward, and adapted to travel with a
train moving over the stretch 0f track by addi
tions to the circuit ahead of the train 'and sub
tractions from the circuit behind the train, induc
_ ends of the train are‘in communicative relation',
~ and means associated with said channels and con-
tors each comprising a, winding on a magnetic
core located in pairs at different points on a train
trolled from said station for optionally placing the
- C5 transmitting and receiving means of said station
in communicative relationwith the transmitting
and receiving means 0f any One» `01` more than
one, of said trains, said arrangement being such
- that communication may be carriednon independ70 ently between the ends of any one or any several.
jacent to and 'Separated by an air'gap from the
respective running rails and each, together with
its respectiverail constitutes an electrical trans
former wherein the winding serves as the pri
mary Winding and the mi] as the secondary wind
of said trains at the >same time that communica-
ing, telephone transmitting and receiving ‘means
tion is being carried on between said station and
connected in circuit with the pair of inductor
any other one or more than one of any other evt
said trains.
in Such manner that, with the train present on
said running rails, the inductors are disposed ad
33. In a system for operating railway trains
`ansmitting means at one of said points and the
inductors for inducing currents in said `75
comprising a plurality of blocks, of. an individual
communication circuit, and means including the « loop circuit extending through each block, and
receiving means at -another of said points for in
ductively receiving said currents from the ‘com-
means whereby when a vehicle vextends into ad
jacent blocks the loop circuits of said blocks 'are
munication circuit whereby continuous tele
automatically connected together to form a singlel .
phoniccommunicationLmay be carried on between
the different pointson`the train while the same
loop extending through said adjacent blocks.
v is moving along the stretch of track.
37. The combination, in a railway signal sys
44. 'I'he combination, in a railway signal sys
tem, comprising a plurality of blocks, of an indi
tem, comprising a plurality of blocks, of a line
10 conductor extending through each block, means
in each block for connecting said line conductor
in loop circuit relation with one of the rails of
vidual loop circuit extending through each block,
and means whereby when a vehicle extends into
adjacent blocks the loop circuits of said blocks
are automatically connected together to form a
single loop extending through said adjacent
blocks, said means being operable when the vehi
said block, a vehicle, signal means carried on the
front and rear of said vehicle, the signal means _ cle operates in a direction opposite to the direction .15
both on the .front and rear of the .vehicle being
of trafiicout from one of said adjacentfblocks to` `
arranged to co-operate with said rail whereby sig
naling maybe effected between ends of said ve
4hicle through the loop circuit comprising said
line conductor and rail and means for joining the
reestablish said individual loop circuits.
4'5. The combination, in a railway signal sys
tem, comprising a plurality of ,.-blocks, of an in-
loop circuits of two adjacent blocks to "form, a
-single loop.
38. Trackway apparatus for use in connection
with an electrical system of signaling through the
track rails between two points' on a train, com-i
prising, in combination with theA usual insulated
39. Trackway apparatus for use in connection
block, and means whereby when a vehicle extends
intoadjacent blocks the loop circuits‘of said
blocks are automatically connected together to
form a single. loop extending through saidad- .
jacent blocks, said means being operable'when 25
said adjacent blocks are individually occupied by
separate vehicles to maintain an individual loop
track - sections each provided with the usual -track
circuit, two condensers connected in series across
the rails of each track section, and a connection
from the junction of each of .said two condensers
to a conductor including a front contact of the
associated track relay. _ _
dividual loop- circuit extendingl through each 20
in each block. i
46. The combination, in a railway signal sys
tem, comprising a plurality of blocks, a loop cir 130
cuit in each block, ’òf means for in‘ductively su\p
4 plying oscillations from a vehicle to the loop cir
cuit -of the block occupied thereby, and means
controlled from a wayside station to relay said
`oscillations from the respective loop circuit to 35
track rails between two points on a train, com-_
prising, in combination with the usual insulated
35 track sections each provided with the usual track the loop. circuit> of another block.
47. The combination, in a railway communi
circuit, two condensers connected in series across cation system, comprising a plurality of blocks, of
the rails of each track section, and means for a loop circuit in each block, means carried by
connecting the junction of ,each said two condens
each vehicle to inductively supply oscillations to 40
ers directly in front of and in the rear of a train the loop circuit of the block occupied thereby vand
to receive oscillations from the loop circuit, and
with a conductor.
with an electrical system of signaling through the
‘ - 40. Trackway apparatus for use in connection' . means selectively controllable to relay oscillations
with an electrical system of signaling through
from the loop `circuit of the respective block to
the loop circuit of another block whereby oscil 45
lations transmitted from one vehicle may be`
transmitted to the loop circuit of said another
block and received upon a different vehicle.
`41?». A trackway system of circuits for telephoni
cally interconnecting stations on a moving train
the track rails between two points on. a train,
comprising, in combination with the usual insu
lated tracksections each provided with the usual
track circuit, a condenser connected across each`
insulated joint, a pair yof auxiliary condensers
connected in series across the rails of each track
section, and a connection from the junction of
50 each pair of auxiliary condensers to- a conductor
and a wayside station comprising, a -series of nor- ‘
mally closed wayside loop circuits .each associ
including a front contact of the associated track
ated withb a definite section of the track over
which the train runs', train controlled devices as
' relay.
41. Trackway apparatus for use in connection
with an electrical system of signaling through/
sociated with the track sections, means includ
ing said devices for temporarily altering said
thel track rails between two points on a train, com.
loop circuits so that a single loop circuit for a
prising, in combination with the usual insulated
track sections each provided with the usual track
stretch of track of greater length than the train
is always presented to the train as it' moves along
the track, and a circuit connecting said single 60
circuit, a condenser connected across each insuf
lated joint, a pair of auxiliary condensers con
60 nected in series across the rails of each track
loop circuit with the wayside station.
section, and means'for connecting the junction
of each pair of auxiliary condensers next in front
of and next behind a. train with a conductor.
`42. In a system for communicating between a
65 wayside station and either or both ends of a
railway train or between the-two ends of a rail-
way train, the combination comprising, an inter
mediate circuit including the track rails in multi
plefmean's adapted to connect said wayside sta
70 tion with said intermediate circuit, and means
'connecting said intermediate circuit with a train
carried circuit comprising a train carried coil in
direct inductive relation with each track rail.
43. The combination, in a railway signal system,
49.' In a train telephone system, a stretch of
track, a train moving along the track, a telephone
set at one end of the train in direct inductive
relation with both rails of the track, a telephone 65
set on the other end of the train in direct in
ductive relation with both track rails, and a cir-~
cuit for transmitting energy between said two
stations comprising at ’all times the two track.
rails in multiple from a point substantially ahead
of the train to a point substantially in the rear
of the train and a conductive medium «between
said points.
50.- A wayside system of circuits for vsimultane
ously conveying non-interfering 'communication'
signals between two points on each of a plurality
of railway _trains in a sectionalized stretch of
track comprising, an exclusive metallic circuit
more of said plurality of trains independent oi'
the communication carried on between the ends
associated with each track section for conveying- ` _of other trains oi' said plurality.
57. In a train operating system in which a
- the signals between the two points on the train
occupying the track section and to which such stretch of railway track is`equipped with track
switches and wayside signals operated by remote
signals are conñned, and circuit controlling de
control from a central point 'over a dispatcher’s
vices for interconnecting a plurality of said cir
line, a closed electrical circuit associated with
10 cuits to temporarily disable their signal confin
ing characteristics and permit the conveyance oi' the stretch of track and disposed so as to cooper
at with telephone apparatus carried by trains 10
signals between stations on a train or trains oc
cupying a corresponding plurality o! track4 sec -operating through the stretch, means controlled
over said line Afor connecting said circuit to the
51. In a train telephone system, a stretch of line, and means including said line and the cir
track dividedinto sections, an individual waysidel cuit connected thereto for carrying on. direct two
circuit for each section inductively associated way telephonie communication between moving 15
trains in said stretch of track and said central
58. In a system for regulating the movement
of trains over a stretch of railway track including
a track switch connecting with a siding in which 20
the position of the switchis controlled from a
_ trolled from said station for connecting any de
` sired number of said circuits. to said line.
52. In a system of communication for railway
trains, a stretch of track containing a plurality
of sections, wayside circuits comprising the track
rails and a conductor connected to said rails to
form a loop circuit for each section, means in,
each circuit adapted to connect adjacent loops
30 together as one loop, and communication means
on each train adapted to be in inductive relation
with each of said loops.
53. A trackway system of circuits for tele
phonically interconnecting stations at
telephone apparatus carried by trains moving
through the stretch, means controlled from said 25
central pointover the control circuit for con
necting said two circuits together, means con
troile'd by a train in said stretch for connecting
said two circuits together, and means including 30
the connected circuits for carrying on direct two
way telephonie communication between said cen
tral point and a train moving through the stretch
òf track.
associated with the track sections, and means in
59. In a train telephone system, a stretch of
track for a train, a train on the track, a telephoneA
transmitting device at one point on the train, a
cluding said devices for temporarily altering said
telephone receiving device at another> point on the
ingbeyond both train stations is always avail
said transmitting devicel to said receiving device
40 loop circuits so that a single loop circuit extend
_ able to the train as it moves along the track.
54. In a system for carrying on communication
between the two ends of a
central point over a control circuit, a communi
cation circuit associated with the stretch of track
and disposed so as to inductively cooperate with
termediate circuit in the track system compris
-ing the two rails in a section of track, a> wayside
conductor insulated from said track rails extend
ing along the section of track, and a cross- con
ductozj connecting each track rail with said
wayside conductor at each end of said section,
said track rails being connected in parallel form
ing one side of said intermediate circuit and said
conductor forming the other side of said inter
mediate circuit.
55. A transmission system comprising in com
bination, the running rails of a stretch of track,
a sending circuit in direct inductive relation
. with each oi.' said rails to induce alternating cur
rent in said rails in multiple and .a receiving cir
cuit remote from said sending circuit and respon
sive to current induced in said rails by said send
. ing circuit.
56. In a system of communication for railways,
a plurality _of trains ina stretch or traçk, a way
side station, means for communication between
the ends of eachv oi' said >trains independent of
-said station,u and means- adapted to place said
station in communication with any one or
train, and a circuit. for conducting current from
comprising the two track rails and a. common re 40
turn path so related to said rails that current
from the transmitting device flows through the
track rails in multiple at points substantially
ahead of and in the rear of the train.
60. In a train operating system, a stretch of
railway line, a train in said stretch, a wayside
station, apparatus` for transmitting and receiving
electric current at two di'iîerent points on said
train and in said wayside station, a circuit on said
train at each of said points connected with the
apparatus at that point, a circuit connected with
~the apparatus in the wayside station, a wayside
circuit for said stretch of track comprising a plu
rality of conductors including the track rails of
the stretch and a wayside conductor connected to 55
said rails at each end of the stretch, said train
carried circuits being operatively associated with
one of said conductors for conveying the electric
currents between the apparatus at said train
points, and means for placing the circuit con 60
nected with the apparatus in the wayside station
in electrical relation with saidwayside circuit for
conveying electric current between said wayside
station apparatus and the apparatus at said train
' Patent No. _ 2,12lhhll9.
Y n
Itis hereby v'certified that error appears in the
_ «
Julyyl9', .1958.
printed- specification »
of the above numb'ered‘patent requiring- correction as follows: Page?, first
“and and the“ reed and the; and second. col-v
` column„l line )45, for thegwords
umn, line 5,! for- “end”- read to; page 8, second column, linelhwfor "signals
H19" reed signals H9; pege 9*, secondv column, line 55, claimì , for “selec
tive“ readselectively; page 10, fir'stfcolumn, line l1, claiin 5, after
` “rails” insert the word in;
and that the said Letters - Patent should be read
with this correction therein that the same may conform to the- -record of the
'v caseV` in the Patent Office. \
»Signed end sealed this 22nd dey of November. A. D. 1.958.
Henry van' Arsdale «
Acting Cor‘nm'iss'ioner of Patent.- '
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