US1294731A - Railway signaling. - Google Patents

Description

- To all whom it may concern:

n ne I HERBERT A WALLACE, or PITTSBURGH, PENNSYLVANIA, Ass GNoIt'To THE UNION SWITCH & sIGNAL oonrANY, or SWISSVALE, PENN Y VANIA; A CORPOR TION on r PENNsYLvA IA.

RAILWAY SIGNALING.

Application filed January 12, 191 Serial No. 71,604.

Be it known that I, HERBERT railway switch or other traiiic controlling.

device.

. One object of my invention is-to' prov de means for the control of a switch operatmg lever by a switch .or switches operated A. WALLACE, a citizen of the Unitedv States, residing at Pittsburgh, in the county of Allegheny and thereby, jointly with the control of one or more signals governing traffic over the corresponding switch or switches, by means of a relay or-other electromagnetic translating device which is energized'in one direction or the other according as the corresponding switch is in one extreme position. or the other, and which is denergized and short? circuited when the switch is in an intermedlate position. The control of the switch oper- .ating lever-is effected by means of one or more looking or indication devices controlled by the relay which also controls the signals, so that the, signals and the indication devices depend for their proper operation upon coincidence of position of the' 'more'of these signals 1s sometimes dispensed with, for instance, signals R and R are. sometimes combined into one signal which, when cleared, indicates to the engineer of an eastbound train that he may proceed term route #l hereafter." However, when the switch is thrown to the ,opposite position, a. e. reversed, it connects the branch E with track B, sojhat traflio'on track B passing eastwardly over the switch is divertedto branch E and =vice versa, westbound traflic on branch E passes over switch A to track B. This route, which comprises track B and branch E, I shall term route #2. v

In order to govern traffic approaching the switch from either direction so that only one train can pass to the switch at a'time, I

. provide preferably four signals designated R R L and L of which signals R and R are shown mounted on thesame pole. Signal R governs the passage of traflic from west to east over route #1 through the interlocking limits,.which comprise that portion of the tracks extending from signal R tosignal L and signal L governs the passageof traflic over the same route in the opposite direction. Signal R governs the passage of a eastbound traific' through the interlocking llmi'ts .over route #2, and signal L governs traffic over this same route in the oppositedirection. These signals normally indie. cate stop and, as I shall explain hereinafter, are controlledin' such manner that but one slgnal at a time may be caused to displa a proceed indication or cleared,-so that ut one train may 'enter the interlocking territory at a time. Although I have shown four slgnals for governing traflic through the interlocking territory, in practice, one or through. the interlocking territory, "but it does not indicate to him which one of the two routes has'been setup for him. These and similar changes are well known and easily made by-thoseversed in the artandit In the drawing reference character B 'designates a straight portion of railway track from which branches oif'another track E through a switchA or other traffic control device. When this switch is in What I shall term its normal position (shown in the drawing) it completes the straight track B so that traific on track B may pass over the switch from west toe-ast without being deflected from the straightroute, which'I shall is understood that I do not wish to limit myself to the particular arrangement of signals and controlling circuits shown in .the

drawing.

Ifor the-operation and control of the switch I provide apparatus and circuits similar to those described in Letters Patent No. 1,101,039 lssued to G. R. Scattergood and .myself on June .23, 1914, although I do not wish to;limit myself to these particular circuits'and apparatus. On the drawing I have shown these circuits in dash lines for the purpose of distinction, the signal circuits connected with the switch rails by means of a rod 40. It will be seen that reciprocation. of the plunger 12 will cause reverse movements of the switch A. Operatively connected with the plate 37 is a pole-changer P for a'purpose which I will hereinafter explain. Although I have herein shown this particular type of motor device M, and actuating mechanism F, it is understood that I 'do not limit myself to these particular types, but that any suitable motor and switch actuating mechanism may be employed. I

The motor M is controlled by means of acircuit controlling lever G, which is usually one of a plurality of levers comprised in an interlocking machine. This lever C may be of any suitable type; as here shown it is of a usual and well knowntype comprising a shaft- 13 which is adapted tooscillate and which operates a plurality of contact fingers one of which, designated 18, controls the circuit-s for the solenoids of motor M.

43 is a source of current which may be either direct or alternating, and which as here shown is a battery. In the arrangement of control circuits'herein showmone or the other of-the solenoids 10.01 11 is connected with the source 43 according as contact finger 18 engages with contact 45 or 4:4. It

is understood however that this arrangement of control of the motor device M by the lever C is merely illustrative and that I do not wish to limit myself to this particular arrangen'ient. The movements of the shaft 13 are as usual controlled by indication apparatus which, as here shown, comprises two indication devices K and K one for each direction of movement. Each of these indication devices as here shown comprises a segment 27 fixed to the shaft 13 and provided with a dog 28 adapted to engage with u a latch 29, which latches are controlled by electromagnets N and R respectively. Each of the electromagnets N and R is provided with a circuit which is controlled by an electromagnetic device .D as hereinafter explained. The circuits for these indication magnets are also controlled by contacts 25 and 26 operated by the shaft 13. These con- 7 tacts are not moved during the first portion of the movement of the shaft 13 up to the point at which it is stopped by the dog 28 of one or the other of'the indication devices,

of the shaft, the contacts 25 and 26 are re- 7 versed in position. This operation of con tacts 25 and 26 is. as here shown'obtained by mounting the contact fingers loosely on the shaft 13 andmoving them by pins 31, 32, 33 v and 34: carried by collars 35 and 36 fixed on the shaft 13. It is understood, however, that the meansherein shown for operating the contacts 25-and 26 is merely illustrative, and that I do not limit myself to this particular means.

The electromagnetic device D is a threeposition relay which may be controlled by either alternating or direct current as described in the Letters Patent hereinbeforereferred to. When alternating current is used to control this relay, the relay is preferably of a type in which the direction of movement of the armature or rotor is obtained by the polarity relation between currents in two windings, and in which the contact fingers assume a middle position in case of no current or of insutiicient current in either or both windings. As here shown this relay is of a polyphase type comprising two windings, a and f and a rotor 1", but I do not wish to limit myself to this particular type of relay. Rotor r operates contact fingers 60, 61 and 62; which cooperate with fixed contacts 14, 15, 16 and 16. When the relay is energized so that the fingers are swung to the left. (which I shall term the normal energization of the relay), contacts 6014 and 62-16 are closed and when the relay is ener: gizedreveli'sely s that the contact fingers are swung to the right, contacts 611-5 and 6216 are closed. lVhen the relay is deenergized or insufficiently energized so that the contact fingers are in the middle positlon, all contacts are open.

19 designates a source of alternating cur rent, here shown as being a generator, to which are connected conductors 20. The. winding 7 of relay D is constantly energized from these conductors 20 through wires 21 and 22..

T designates a transformer whose primary 41 is connected with conductors 20 and. whose secondary 42 is connected with contact points l8, 49 and 50 of pole changer P. The movable contact fingers 17 and 17 of thepole changer P are connected with the winding a of relay D by wires 23 and 24. It will be seen therefore that while the pole other, that is, when the switch actuating mechanism F occupies one extreme position or the other, the winding a is energized from transformer T in one direction or the other relative to the energization of the winding 7, so that the contact fingers of relay D then occupy one extreme position or; the other. \Vhen, however, the mechanism F is intermediate its two extreme positions,

changer P is in one extreme position or the 1,294,781 I is:

- g the contact fingers 17 and 17 of pole changer Pare disconnected from transformer T and v engage contacts 46 and 47 which are electrically connected by wire 51, so that the winding a is then disconnected from the transformer T and placed on the following short-circuitifromwinding a through wire 23,-contact finger 17, contactpoint 47, .wire

' 51, contact point46, contact finger 17, wire 24 to winding (1. The rotor 1' of relay D then assumes its middle position, so that all:

contacts 61-45- and 62-46 the relaycontacts are open. The short cirouiting contacts 46 and 47 are added to shunt from the winding a current which might t'ated from its normal position shown in the drawing in the direction indicated by the arrow until the dog 28 of indication device K engagesthe latch 2.9. In this position the contact finger 18 has been disengaged from contact 44,-and has engaged contact 45, so

that solenoid 10 is energized through the following circuit; from battery 43, through vwire 52, contacts 18 and- 45, wire 53, solenoid 10, wires 54, '56 and, 55. to battery 43.

This causes solenoid 10 todraw the plunger- 12 thereby shifting the plate 37 so that the roller 39 is moved by the cam slot 38 and the switch A is reversed. As soon .as this movement begins and while the upper longitudinal portion of the slot 38i snoring past-the roller 39, the pole chamger ll is o.

erated so that its contact fingers 17 and 1 a.

disengage from-contact points 49 and 48 and engage with-contact ints 47 and 46 thereby placing the win ing aofrelay .D on

short circuit so that all the contacts of this relay are then opened. The fingers 17 and- 17 of the pole changer continue to engage.

the points 47 and 46 while the switch A is being moved by the inclined portion of the slot 38. When the movement-of the switch A is..c,omplete and the lower longitudinal portion of the. slot 38 is moving past the roller 39 the contw fingers 17 and 17 are moved to engage with contact points 50 and g 49 thereby connecting windlnga with the transformer T in the direction opposite to that shown .inthe'drawingi Relay D is now energized in the reverse direction-so that contacts,61-15 and 52%16 are closed, The reverse indication magnet R .is' then .ener-- gized by the ioilowihg circuit? from. bat tery 43, through wiresfifi and 56, contact .signals governing traffic over. I shall now explain.

- tact points.

15 61, wire 57, contact finger 25, wire 58, magnet- R, wires 59 and 52 to battery 43. Magnet R then raises' its armature thereby raising the latch 29 outof the path of dog .28 of indication device K so that the movement of shaft 13 can be continued until the lever arrives at its reverse position.- During this last portion of the movement, contact .25

isopened, thereby opening the circuit for magnetR, and contact 26-is closed thereby closing at that point the circuit for magnet N.

The operationof the. apparatus for the movement of the switch. A from the reverse I to the normal position would be similar to that just explained, hence, it need not be eX- plained here in detail. v From the above description of the apparatus for controlling the movement of the switch it is evident that under ordinary con-- ditions lever C, relay D and switch A occupy corresponding .positions; thus, when the switch is inthe normal position, lever C and relay D are also in their normal positions and when the switch is reversed, lever (land relay D are alsoreversed. I utilize lever C and relay -D for the control of the the switch as Reference character C designates a circuit controlling lever similar to lever C, generally of the same interlocking machine, and

for purpose of distinction I shall hereinafter refer to lever C as the signal lever and to lever C as the switch lever. Signal lever C occupies normally a middle position shown in'the drawing, in which osition contact fingers 75 and 76 operated y the lever are out of engagement with their respective con-. When the lever is turned to the right, i. e.,' in the direction of the arrow marked 1', contact fingers 75and 76 are brought into engagement with contact points 77 and 78 respectively. On the other hand,

when the lever is thrownto the left, as indicated by arrow 1, these contact fingers engage contact points 79 and 80 respectively.

The signals are governed by circuits whichare controlled by'these'contacts in conjunc 1 tlon with similar contacts on the switch lever C and alsoby contacts 16 and 16-of relay D.

Forexample, signal R? is controlled bythe 4 following circuit: from battery 43, through. ,Wires. 55 and 56,- contact--62'16'of relay -D, 4

wire 81, contact.76-78 of the signal lever C, wire '82, contact 83 of theswitc h lever C,

wire 84, si a1 R and wires 85 and 90 to battery 43. t follows that in order to clear s gnal R thesignal lever C must be thrown .to theright,-relay D must be in the normal switch lever C must also be in the normal position so that contact 83 closed. Similarly, the circuit for slgnal L ris from battery 43, through wires 5:5 and 56,.cdntact -position so that contact 16 is. closed and 62-16 of relay D, wire 81, contact 768 of the signal lever C, wire- 86, contact 87 of the switch lever C, wire 88, signal L wires '89 and 90 to battery 43. It follows, there- 0 must be in the normal position. The circuit for signal R? is completed only when switch lever C and relay-D are reversed and signal lever C is thrown to .the

' right, so that the following 'circuitisestablished: from-battery 43, through wires 55 and 56, contact 62 16 of relay D, wire 91,

contact 75' -77 ofsignal lever C, wire 97,

contact 98 of switch lever C, wire 94, signal R wires 95, 85 and 90 to battery 43. On theyother hand, signalL is cleared only when switch lever C and'relay \D are reversed and signal lever C isthrown to the left, so that the following circuit is closed: from battery 43, through wires 55 and 56, contact 62'1'6 of relay D, wire 91, contact 7579 of signal lever C, wire 92, contact 93 of swjitchlever C, wire 99, signal L wires 89 and 90 to battery 43.

Theopera-tion of the signals is easily understoodfrom the foregoing de'script-ion of the circuits. Suppose that the switch is in the normal positiOn so that route #1 is es-' tablished. If the operator desiresto permit an eastbound train on track B to pass through the interlocking territory via route #1, l e-clears signal R by throwing signal lever C to the right. This closes at contact 7 6-7 8 the circuit forsignal R traced here- "inbefore, so that signal R is caused to indiate roceed. At this time the circuit for p signal L (which as pointed out hereinbefore governs traflic' over route #1 in the opposite direction) is open at contact 80 of slgnal lever C, whichmakes it impossible'tofclear signal L as long as signal-R is in the pro-- ceed indi'cationso that no"opposing clear indication" can be given over the same route Thefcircuits for signals'R and L are now openfat contact 62'.16 of rela'y D and contacts 98 and '93 of switch lever Csothatit' is 'also-*impossible'fto' give clear signals for- 50, s i .1

route #2, if y 1 W v In "order" to reverse the switclu the operator first return signal lever C to its middle" or normal "position; This isn'ecessit-ated by "at-mechanicallocking arrangement which forms no part of my invention and is well understood by those v'ersedii'n the art, so that I hav e'lhot shown it on the drawing.

lVhe I'i'signalleveritl returned to its nornial-"position, "contact "finger 7 3 breaks the circuit for signal R? so that this signal is lllOllillO train may enter the'limits of the in- R and L and switch lever C closes the circuits for these signals at contacts 98 and 93 respectively. The operator may now clear either signal R or L governing route #2. I .If he desires to allow a westbound train on branch E to pass through the'interlocking limits, heclears signal L by throwing signal lever C tothe left so that contact finger 7 5 engages contact oint 79 and completes the circuit for signal L At this time the cir-' cult for opposing signal R is open at contact" 77 of signal lever O so-that no opposing train on the s'ameroute may enter the inter-- locking limits. Also the circuits of signals R and L governing route #1 are open at contact 16 of relay D and contacts 83 and 87 of switch lever C, so that no train on route #1 may-enter the interlocking limits from eitherend.

It is apparent from the above description ofthe signal circuits thataft'er a certain route through the interlocking limits has been established by the switch itv is possible to clear only either one of thosefsignals whichgovern thatroute and it is impossible to clear either Of the signals which govern the other route. This selection is automatically accomplished by the position of the switch lever C and relay D and'theoperator has control of the'signals only in so. far as he may select thedirection in which a train movement is to be made over the route that has been established. This co-action of the.

switch lever and" relay Dis of great advantage the 'colltrol bf, the signals in thatit constltutes a double check on the proper. relative positions "of the switch lever and. the

switch before a signal for any route leading ov'ertheswitch may be cleared; Although ord narily, both theasw'itch lever and the relay- D occupy positions that correspond to the position of theswitch, it is not the best;

practice to'rely on'only'one. Offihese means for the control v of the signal, circuits, because it may happenthat either lever C or vrelay D does not corresppnd to the position of'the switch. For 'ins'tanoe', the. operatorjmay throw-the swltchileverC until the latch .o'f the indicatlon device preventsfurther move-c ment 'o'f the lever. The switch should now respond and give an indication of the com-v pletionjof its movementiby energizing the indication magnet so' that the stroke I of. the

the indication apparatus is gout of 0rder,.11

are in non-corresponding positions. :Thisl lever may be completed. ,lf, due to .somey} derangement, the-switch .does, not move at ve hmusho ly-p rt of i s stro 1 I y theoperator may, under the impressionlth" t .caused 'to'ass'u ne the stop indication. Since the other signals are also in the stop posi they can be wired easily andcheaply-in ,0, invent on.

condition may also be brought about by a manual operation of the switch actuating mechanlsm on the ground'-leaving the switch lever unmoved, so that it does not correspond in position with the switch. But it is of greatest importance for the proper functioning of an interlockingmachine that all switch levers always correspond in position-.with the switches controlled thereby, and if this condition of non-coincidence of the switch lever and the switch should happenat an installation using the signal control circuits of my invention, no clear signal could be given over any route leading over 15 this switch because the corresponding signal circuits would beopen at the contacts of the relay D-or at'the contacts of lever C, The use of the relay' for the control of the signal circuits is of great advantage because it permits of greater economy in the use of wire than is possible when the signal control'circuits are led through the inter-- locking territory and are controlled by contacts'directly operated by the switch movement, as is sometimes done. This is espe cially true of extensive and complicated in- -terlockings comprising a great number of switches and crossovers, -where control. l of the signal circuits by contacts onthe switch gg iii'ivements necessitates a very complicated 1 1e? of I conductors vbetween the various switches and signals} So great,- indeed, is the length of wirerequired in such interlockings that in general only [the signals 35 for the high-speed routes are thus wired, Q leaving signals for 'thea-low-s'peed routes without this protection. The partial protection thus secured is insuflicient in the case of intersecting high-speed 'andtlow-speed routes because a.'false clear signal for a lowspeedroute-maypermit the pamage of a j low-speed train intoaor across an'oecupied I high-speed route, Even this partial protection .may'be nullified by grounds on the 6 contacts operated by the switch movements. But in the use oi my inventio'n the relays controlled by the switches are generally housed in a compartment of the interlocking. tower, so that, without danger -from grounds,

such manner that each signal is governed by all the 'neeessary'switches' Although I- hare herem hownand dc scribed only'oneform and arrangement of signaling-circuits embodying myinvention,

itis understood that various changes-and modifications may be made thereinwithin the scope of the appended claims without departing ,from the spirit and scope of my .Havingthus described my invention, what i I'claim is: a

1. In combination,- a railway switch having a normal and a reverse position, a relay mal and a reverse contact the former or the switch is in normal-or reverse position, a lever for controlhng' sa1d swltch and having a normal and a reverse posltion correspondlatter of which is closed according as the ing to the said positions of the switch,'=fa

- normal and areverse contact operatediby sa1d lever and the former or the latterlof WhlClLlS closed accordingasthe lever islin normal or reverse pOSltIOIl, two slgnals-g o'verning traflic over sa1d swltch, a circuit for;

one signal controlled by the'normal ,relay contact and the normal lever contact in series, and-a circuit for the other signal con-J.

trolled by: the reverse relay contact and'the reverse lever contact'in series.

2. In combination, a r'ailway switch; relay, means .for governing the relay by the switeh,-a lever for controlling the switch, means for controlling the lever-by the rela a signal for overning trafiic iover'the' switc .l

and means or controllin relay and thc'le'ver.

(position, a switch lever having a normal an g the signal :bythe In combination, a railwa' switch hav- .f -ing a normal and a reverse areverse esttion, means interposed between said l'evler.

and said switch for controlling said switc'ljr by said lever, ;a relay controlled by said i switch to assume a normal or a reverse posi-" thin responsive to the position of said.

switch, and. si

gnaling means cbntr'olled by, sald relay. A- on ing'a normal and a reverse position, a switch 4. I combination, a railwayi switch ham v v lever havinga normal and a reverse positions;

means interposed between said lever and said,

switch for controlling said switch by said lever, a relay controlled by said switch to assume a normal or 2; reverse position re spo'nsive to the position of said switch, and signaling means controlled b' said switchlever.

5;"In oombin ing' a normal and a reverse position, a switch lever having a normal and a reverse pos1- tion, "means-interposed between said lever ysaid relay and;

ation 'a railway switch-havand'sai-d switch for controlling saidswitch ,I

by said lever, a relay controlled by said switch to assume .a normal or a reverse posie tion responsive to the position of said switch;

indication; means controlled by said relay for preventing movement of said lever into saidnormal'or reverseposition untii after said switch has moved into .saidnormal or reverse position, a signal controlled by said. relay for governing 'traflic over sa1d switch, and means controlled by the lever for preventing'said signal from being cleared .1111- less sa1d l'ever'and switch are incorresponding positions. v

. 6.111 combination, :a railway switch, a

lever for the control thereof, a signal, for

governing traiiic over the switch,'a locking" I65 controlled by said'switch and having a nordevice for restricting 'themfi'tsilient of said 134;

lever, a relay responsive to said switch and energized by current of one polarity 1n one extreme position of the switch and by current of opposite polarity in the other, ex treme position of the switch, means for controllin said signal and said locking device I by sai relay, and means controlled by the lever for preventing said signal from being cleared unless said lever and switch are in corresponding positions.

7. In combination, a railway switch having a normal and a reverse position, a lever for controlling said switch and having a norto normal or reverse position until the switch mal and a reverse position corresponding to the said positions of the switclna; relay controlled bysaid switch and energized in normal or reverse direction according as the switch is iii normal or reverse position, lever locking means controlled by said relay for preventing complete movement of the lever has completed its movement to the corresponding position in response to a partial movement of the lever, and a signal govern-" .25

coincidence in 'thepositions' of said lever ing trafiic over said switch and controlled 'by said relay and by said switch controlling lever.

8. In combination, a: railway switch, a lever for the control thereof, a relay controlled by said switch, an indication device controlled by said relay for controlling said lever, a signal for governing traffic oversaid' 1 switch, and means for governing said signal by said lever and'said relay sothat a proceed indication of said signal can be dis- "played only when said lever and said switch are in corresponding positions. v

9. In combination, a railway sw tch 113V;

ing a normal and a: reverse position, a lever also having a normal and a reverse position forv controlling said switch, a relay responvsivejto'said positions of the switch, an inch-'- cation device controlled bysaidrelay' for governingsaid lever, a signal for governing traffic over said'switch; and means controlled by said relay andsaid lever for checking and 'sai'd switchbefor'e a proceed indication of' said signalc'an'b'e produced and maintained: 1 i i 4 l- 0l fIncombin'ati'on', a railway switch have ing. a" normal and a reverse'position, a' relay controlled by sald switch-and having a nor m alan'd iareverse contact the former or the latter ofl which is closed according as the switch in normal orreverse position, a

lever-"tor controlling said switch' and having a norina land a reverse position correspond ingf'to the said positions ofthe switch, two

normal-and tworevere contacts operated by said lever the former being closed when theleverais in normal position and the latter be- 111g, closed when the lever is in reverseposit1on, a pair of signals governing traffic over said switch in one direction and a pair of signalin .one direction at a time.

signals governing tr-afiic over said switch in the other direction, a circuit for onesignal of one pair controlled by the normal relay contact and one normal lever contact, a circuit for one signal of the other pair con-.

11. In combination, two routes for railway v traffic, means i or completing one or the other of said routes, a lever, means interposed between said lever and'said first-mentioned means for controlling said first-mentioned means by said lever, an electromagnetic translating device responsive to reversals of current, means for controlling said 'trans- V lating device by said first-'mentionedmeans,

.meansfor controlling said lever by said translating device, a circuit controlling lever,

ing trafli c over each route in both directions,

means for controlling the signaling means. for each route by said first mentioned lever means for each route for governand by said electromagnetic controlling d e- I vice, and means for-further controlling the signaling means for each route by said circuit controlling lever whereby traflic over'l either route is permitted to'proceed in but 12..In combination, two'rout'es' for rail. way traffic, a switch for completing one" or the" other'of said routes according assaid switch is its normal or its reversed position, signals for each route one for eachdirection of traffic-over said route, a controlling lever having a-normal and a reverse p0 sition, means interposed between said-lever correspond in position with said controlling lever, a'rel'ay having a normal and a reverse pos1t1on ,f1neans for causing said relay to "and said switcnfor causing said switch to correspondlin position with said switch,

means controlled by said rela'y-ifor preventing said controlling lever; fromass'nming Said normal or reverse position until afte said-switch has been movedto its conesponding position, circuits for controlling said signals;-means controlled-by said circlos'ing partially the circuits "of the "signals governlng trafiic over the route completed for completing the circuit of only one of the "cuit=controlling lever and said relay for t by said switch, and'a signal contro'lling'lever "signals governing the last mentioned route.

13. In combination, a railway traffio'cb11 trciling device, a-lever, means interposed be tween said lever and-said device for controlling said device by said lever, an electromag' netie translating device responsive to rei versals of current, means for controlling-said translating device by said railway traffic controlling device, means for controlling,

said lever by said translating device, signaling means for governing traffic over said trafiic controlling device, and means for controlling said signaling means by said lever and said electromagnetic translating device.

14. In combination, a railway trafiic controlling device, a lever, means interposed between said lever and said device for controlling said device by said lever, an electromagnetic translating device responsive to reversals of current, means for controlling said translating device by said railway traffic controlling device, means for controlling first mentioned lever and said electromagnetic translating device.

In testimony whereof I aflix my signature 7 in presence of two witnesses.

' HERBERT A. WALLACE. Witnessess A. O.'N0LTE, H. S. LooMIs.

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