US1043818A - Non-interference signal-box. - Google Patents

Description

G. L FOOTE. NON-INTERFERENCE SIGNAL BOX. APPLIOATIOK FILED FEB. 1, 1911. 1,043,81 8. Patented Nov. 12, 1912.

3 SHEETS-SHEET l.-

WIT/ 8558 1 INVENTUR I 9 9; L ZZ'OZ e Br G. L. FOOTE.

NON-INTERFERENCE SIGNAL BOX.

' APPLICATION FILED FBBJ, 1911. 1,043, 18.

Patented Nov. 12,1912.

3 SHEETS-SHEET 2.

m llllllllimlliiiii lllll IIIIIIH INVENTOR- I jag: Z30 f6 j er mqnllsrs G. L. room NON-INTBBFE RENGE SIGNAL BOX. APPLICATION FILED FELL 1911.

1,043,818. Y Patented Nov. 12,1912.

3 SHEETSSHEET 3.

WITNESSES I INVENTOR %M//@m% v 2 i Z M TTTORNEYS ESTATES PATENT onnion.

GEORGE nlroofrn, 'OFIIBRQOKLYN, NEWAYORK, ASSIGNOB T Gnomesroom AND YoRKJ'n-x.

To all whom it may concern. I r

.Be it known that I, GEORGE L. Foo'rn,

a citizen of the United States, and a resident of=Brooklyn, -in the countyof Kings.

, .5'a11'd State of New 'Yo'rk, have invented certain new and useful Improvements in Non- Interference Signal-Boxes, of which the following is a specification.

My invention relates to electric signaling 1'0 apparatus commonly known assignal boxes or signal tran'smitters and particularly to 7 a that special form ofsuch apparatus in .which a characteristic signal repeated anumber of ,5 times;

. a. box. or transmitter of such character that when a number 'of them are used upon thefl 7 same circuit and one of them pulled-to transmit a signal, a second box pulled after the first will be. automatically locked out of action and have its signal stored and will,

1 {when the first-box completes. its action, be

1." automatically caused. to come into action 25. and send its signal through the normal I change. of circuit condition resulting from the cessation v of action of thev first-pulled box.

30 ca'use 'the boxes tooperate in such manner hat there shall be no mutilation or confusio'n of signals arising from the secondtilled box transmitting its signal before 33 1 "lete signal of the first-pulled box.

' i iroiistriictithe apparatus that'wh-ilefthe secyftm iitlfliiilfletl'box may be locked from sending ready to act but will act only invTduringflthe transmission of the signals afterthe ne ntlprevioujsly operating non-INTERFERENCE srGnAnnox.

Specification of Letters Patent. I

a signal wheel is employed adapted to send I Theobject of my invention is to produce further object of my invention is to 'mitting' its signal. I

e lapse ofthe usual space following each Af'fiirther object of-my invention is to so I al iithe actuating train of said box he firstbo xj, thereby preserving Y box shall have-sent its complete round of signals.

In'its main purpose preventinginterference between boxes operate'd oathe same clrcult, my invention resembles previous apparatu's' but differs therefrom in the essential features which will .1 be obviousto those skilled in the art froni-tlieisubjoirmd description taken inconnection .ivitlrthe accompanying drawings,

The invention consists in:thellconstruction and combinations of devices hereinafter described and then. more particularly specified'in the claims, i .1

In the accompanyingdrawings,L Figure 1 is anedge view v of the .nieclialiisn 'of. signal transmitter embodying my invention.

looking inthe;directionfoffthe arrow 1 of Fig. 2. Fig.2 isa.frontelevationfot the same. F 3 is anfeleyationfof -,the parts back of the front plate ;and ',signa1 wheel. Fig. 4 is a vertical section on the line :I V IV of.Fig.'3. Fig. Siillustfrates/a position of the sending lever. and adm n device after the box has been started and in the. position which permits the same tosend, signal.

Fig. 6 shows the same lparts in po'sitionfor locking out a second bon in lcase the same has been pulled while the first box is' trans- ,Fig. 7 is a..perspective view of the'startinglevergi 1 indicatesa siggmal wheel of the usual'com struotion employed in the class of apparatus to which my invention relates. Suchsignal wheel has notches in its edge suitably spaced in groups and having inQeachqg'rOup V the proper number of notches to cause'thebox .to send its own characteristic The direction of rotation, of this ,signal'fwheel in sending the signal is indicated by the arrow and the notches as shown are adapted to cause the box to send. the signal No. '35,

.which as usual in this, class ofbdxes, is repeated, any desired number of times to give what is called a round of signals,.usually four complete signals. a

2 is a lookout or nonnterference. magnet which is normally. out of circu t when the box is at rest, but 1s thrown 1 1l'1t0.-'C1IOll1l3,

. when thebox is pulled, the bfreaking of a'shunt normally completed .aroiiiid themagnet and circuit breakingldeviicesjby. which the signalis transmitted,as usual-fii gthe art. l he sig'nal wheel operat aua' signal Patenceanov;12;"1912. Aimucauon filed February 1,1911. seriaim. 6 5, 59.

J HENRY. Gin" nsommome BUSINESS A's FIRM or room, rrERsoN & COMPANY, or

character. Preferably I employ that form which Comprises a sending lever 3 engaging the periphery'of the notched wheel so as to be actuated thereby and in turn operating upon the contacts of a circuit breaker 4 in such manner as to open the circuit when the lever drops into a notch in the wheel, but to cl'ose'the circuit when raised out of the notch. v he actuating mechanism for the wheel maybe otjany desired form'but is preferablyf a spring. operated actuating mechanism, the spr ng of which, indicated. at 6, is connected to a gear wheel 7, whichin turn gears with pinion 8 on the shaft 5 carrying. the signal wheel. The retarding mechanism. for retarding the actionfof, the spring-may comprise the ordinary escapement wheel 11 upon a shaft 10, with which a gear wheel 9 on shaft 5 is geared. The starting lever 16 operated by the usualpull-knob is provided, as indicated, with an are adapted to receive a pin- 15 on the wheel 9 or other wheel of the train to lock the. actuating mechanism against' operation until the pullknob'is operated to send a signal. \Vhen the lever is lifted the pin being freed from the notch permits the wheel 9 to rotate.--' The starting lever likewise is provided wit-ha projection 17 adapted to ride. on azcollar. 18 of the main or other wheel "of the actuating mechanism and said collaris notched at two points preferably, so that the-starting lever may drop into. the notch and stop the revolutlon ofthe actuating mechanism when the signal wheel is revolved to send the signal the allotted or proper numbe'r of times.

The lockoutor nonrinterference magnet 2 is normally shunted and means are provided for breaking said shunt and throwing the magnet nto circuit with the-signal transmitting mechanism when the box is pulled.

Said means may comprise, as usual in the art, an insulating pin 40, carried by the jstarting lever and adapted to separate the shunting springs 11, thereby bi'eakinga normal shunt around the magnet and-contacts l of the signal transmitting niechanism'.

to mechanically engage and lock. some portion of the transmitting. rnechanismagainstoperation by the actuating-mechanism and leaving said; actuating train or mechanism free to (act signal wheel driven under the. control of the, remaining parts the apparatus. as.w1ll be, presently 1 scrlbed. Sa d mechanical lockout deny: a simple form embodiesa lever 19 t The apparatus further embodie'si -a me chanical looking or loclgputdevice adapted sending position, that is to say when it is lifted by riding on the unbroken edge ofthe signal wheel or uponth'e teeth intermediate the notches in said wheel. Said lockout device is so mounted or constructed as' to be without bias, that is to say it is adapted to retain either of,the positions into which it is thrown'unti-l it is thrown positively in the other direction. For this urpose the lever 19 may be freely pivoted with slight friction upon-its pivotal pin. .Its movement in one direction to lock the sending lever is produced by an armature lever 14 which engages the rear of the lockout device by' a pin 22 or other neans- The lockout device is thrown out of action by a device connected with theactuating train, as for instance a pin 21 mounted upon the signalwheel 101' other memb'erof said train. When the lever is thrown to'"lock' out the box it will-retain its'lockout position until positively actuatedby the pin 21. Likewise when thrown back by the operation of said pin to the nonlockingposition indicated in Fig. 2 it will automatically retain that position even after being freed from the pin 21 until it is thrown forward positively by the action of the lock-' tout magnet armature lever. I f the sending lever be lifted fully and the magnet 2 be at the main line circuit by transmission of sig-- nals from any other box, the armature 12 of themagnt is thrownback by the usual action of the spring. and the pin 2'2 carried by the armature lever 14 will engage the'rear side of the lockout lever 19 and force the same forward, so that the shoulder 20 will pass under the sending lever and hold the same lifted until the pin 21 has resumed the position shown. or normal po itiom-and forced the lever 19 back. This normatposition is the position reached by the actuating train after the box mechanism has moved to an'extentsufficient to send a complete signal and has arrived at the normal position or position ready for beginning the transmission of another signal "of the four or more signals making a round. of signals fromt-he box. In this normal position the sending lever is free of theshoulder. thus permitting said sending lever to rise and fall under the action of the signal wheel when the latter is, rotating. When the sending lever drops into a notch and thereby opens the circuit and consequently discharges the .magnet 52. its'cnd falls below the "shoulder of the lever and thereby holds the l'ocli ou't'device in. inoperative condition, al-' i'ghilit is, at such time, en"gaged by the pmf'22, owing to there-traction of the armat-urffe' 'lever14byits retracting spring. The animate leverjolf'the magnet. 2 also conjnedts with and operates upon a detent- 13 I d .1-.. MJ nan. LL

nal when released by the starting lever.- As

drawn forward and the lower end of the lever 14 1s pulled back, pawl 13 is lifted from engagement with the teeth of wheel 11 -"and the signal box mechanism is free to retate. 'When the magnet is discharged and the sending lever is at such time in nonsending position or litted,as shown in Fig. 6, which represents the position of the parts at one'stage of the operation of the box, the

v tation of the actuating train of the box, this i being due to the fact that the shoulder the lever 19 at suchtime is free to pass under the end of the sending lever, as shown in detent 13 will be permitted to engage the escapement' wheel and temporarily stop the ror 6. If, however, when the magnet is c} charged, the said sending lever is in send position, that is depressed, it will prevent the detent from' moving into engagement with the escapement wheel to temporarily stop the rotation of the "train, because the lever 19 will then engage the end of the sending le- -ver and-the lower end of the armature lever will be prevented from moving over, by en-, gagement of its pin 22 with the rear side of lever' 19. y

f The general operation of theapparatus is as follows: ,Normally the parts stand in the. position shown in Figs. 2 and 3, the lockout device 19,.armature lever 14 and pawl 18 being held in such position by the action of the pin 21 upon the inclined projeption of the lockout device The pawl 13 being then lifted from the teeth of the wheel 11, the box train is free to rotateandsend the sig soon as thebox is pulled the shunt around the magnet and transmitter spring is rotate the pin 21 passes beyond the projection ofthe lockout lever or device 19 and at first the sendingll'ever rides on the unbroken surface of said signal wheel 1. During this time, it hoot-her bon Phas been previously pulled, the circuitthrough the magnet 53 will remain unbroken and thellever 19 being withoutbias, as described, will retain the position shown, or the position in which the sendinglever will be free to fall whenever 1tencounters a notch in the sending wheel. On reaching the first not-ch the sending'lever drops and the circuit through the springs lis broken to send the first'impulse of the signal No. 35. In dropping, the end of the'lsending lever 3 as before described,

drops into position to hold the lockout lever back although there is pressure by the pin 22 through the actionlof the retractor spring magnet 2 is discharged the breaking of "Hie-circuit. This ion'isrepeated at each he sendmg' lever,

first "box pulled will 'of the' 'airmature lever at the instant the l which is t on the mains wefore free to follow'the signal .1 long as the magnet re-- :ged while the lever is in fully l m on. As will fbe obvious", when said is; fully liftedj'the magnet-2 can only be discharged'by the -'breaking of the main line circuit. by the transmission of signals by some other box. in the absence therefore of any otherhoir. being pulled, the

' insn'iit its signal having completed zit interference dhu will he brought to rest automatically by ting let engagir pin at which i roperly positioned for 1 ise, 'fi'lii arrive agam tit-normal polever or (it use 19. Shouldanother. box on the same be pulled after. tlie hi'st is in operation, the rill start into op- "er will ride at am hi the sig .by a transmission originating in the first box, said armature will -..force'the lockoutdevice over, bringing the shoulder; under the end of thesending lever, which-position, the lever 19, being without bias, .willretain, thusho-lding the sending lever up and pre-' venting it from sending any signals:- The armature 12 of the second b ox will: however be caused' to vibrate by the. interruptions of circuit of its magnet which has been thrown into the eircuitby [the 'act of pulling such second box: Every time the armature drops back bythe breaking of circuit through the magnet of th'e fsecond box. the stop pawl or dog 13 will drop into a tooth of the escapementwheel l'land tem- "porarily prevent rotation ofthe mechanism of the second box. "Therefore;- itwill be round of four or more complete signals,

men opposite theprojection onthe'lo'ckout seen, that while the first box is sending, the

second will be prevented from sending, and while the signal wheel. of the first-pulled" box is rotating continuously, the'actuating train of the second-pulled'b'ox is only rotat-" ing intermittenth owin to theflvibration of the armature 12 under the influence of the signals sentby the first-pulled box; By this means, the main or driving spring is prevented-from running down-and its power is conserved for the sending of the signals when the box is pulled; In the meantime. the first-pulled box completes its round of signals; as already described, and its startsition and closes the shunt around t-he'mech- 1- ing lever-automatically resumesnormal poanismof said -box.- .Thearmaturexlz of the magnet in the second-pulled box is now held up by the current "on the ci'rcuit,lw.hidh curthe sending lever, which can then send its" signal.- N o matter in what position of the wheel 1 of the, second box'the first boxstops sending, the sender 3 of the second box cannot operate until the beginning of its signal, inasmuch as it will beheld locked up until the actuating train has brought the pin 21 around the zero or normal starting position.

and has forced the lookout lever 19 overto release the sending lever. Should it happen that the mechanism of the second-pulled box rotates so far as to throw oil thelockout before the first box completes its signal, said lockout will again be brought into action to lock out the sender lever at the first interruption of the circuit by the first-pulled box and in the'manner. just described.

No matter how many boxes be pulled at or about the same time, the one which first breaks the circuit byits sending lever will automatically lock out all of the othersand will go on and complete its round of signals, As soon'as its mechanism is restored to normal, the train is stopped by the stop lever 16 and the circuit will be placed by said first operating box, in normally closed condition, and thatgone of the other boxes' whose pin 21 first reaches'normal position will have its lockout restored ,to normal position and said box will start in to operate in the normal the Way, since the magnet of said box istadapted to respond to' the normal signaling current and will therefore draw up its armatureand hold the stop 13 out of the teeth of the wheel 11 of the actuating train and the operation of said box will then'proceed in just the same way as if it werethe only bo'xthat had been pulled. The remaining boxes will be stillv retained in locked out-condition but ready to cut in on the circuit and send their characteristic signals in the order in which their pins 21 respectively reach normal position. Should it happen that the signal wheels of any two boxes begin a revolution at identically the same instant and break circuit at the same instant, the one having the greater-number of notches in its initial group will seize the line and send its" signal without mutilationbecause the first "interruption of circuit produced afterthe' number of notches in common has run out will lock out the box having the smaller number in the initial group, the sender lever 'arepulled at or about t e same time and of the latter at Such time riding on the space segment between groups of notches. After box so-seizing the line has completed an mama tl'm lmY- with the smaller initial terrupted or delayed.

signals is produced, since any locked out tion of signals necessary to complete its round it its round has been interrupted. In the case of both boxes however, all'the signals will be complete, although the round of signals of one or both may have been in- 7 hat during the o era-' tion of onebox in' sending its round 0 signals, the mechanism of.other.boxes which in the meantime have been pulled will be 7 running, but only intermittently, so that they cannot move suificiently to exhaust the 'It will be observed necessaryfaction of the power in sending at least the final one of the round of si als.v Thus, for instance, if a second box "s 'ould be pulled immediately after'the first, the cam 18 on the second, would bepermitted to move only apart of thezway necessary to bring its notch under the pin 17 of the-starting ver andsaid second-pulled box would 8 therefore send at least the final signal of its round of four and said signal would be a complete, owing to the fact. that the lockout is only thrown off when the signal wheel is at normal or zero position. l 9 As'will be seem-the individual signal transmissions coming over the line from thebox first pulled act in'a second-pulled box through the pawl 13 operating the stop device to delay the action of the actuating 9 train. But in the case of the first-pulle box or, the one acting in .its normal manner to transmit" its 'signals,-it is desirable that thegear train of said box should move un-- interruptedly. This is accomplished as will be seen by rendering said stop mechanism inoperative at each transmission, since each time the sender lever drops to break the circuit andthereby discharge the magnet 2, the lever 14 will be held 'from'operating thestop 13 by reason of the engagement of pin 22 with the lever 19, which at such time is blocked by the depressed end of the sender lever. In all cases it will be seen that no confusion of signals can arise from the characteristic signal of one box following the characteristic signal of a previousl acting box before the usual space whic should follow or exist between characteristic box is unlockedonly when its signal wheel reaches-the normal or starting position and the segment of the. signal w eel on which the sending lever first rides is suflicientl prolonged to cover at least the usual or a lottedterminal space following each char-- acteristiesignal and serving to space characteristic signals from one, another.

Should it happenthat number of boxes that "one or more of them may have its sending lever held up so long that its mechanism, intermittently rotating as described:

signals. When the key isso used. an initial st rument.

wheel 1, and thereby have lllOYttl to position where the lever to would be permitted to drop and stop the. rotation ol the ll]ttll21 nism, thus requiring the box to be pulled again; such action will be prevented by the loekoutdever locking the starting terer from dropping. through engagementv 01 :1.

period will go on withoutinterruption to resume its round or cycle of actions and will be ready to send its own signal as soon as. the signals stored in the other box or' boxes, ishetl.

\Vhen boxes constructed -in accordance with my invention are used upon a circuit. signals may be sent over said circuit at any time during the operation ot a box or a series of boxes by the usual signaling key without so far mutilating the signals being transmitted by a box as to render the-same unreeognizable on the receiving tape or in- ,lhus tor instance. in the case of boxes used on a tire alarm circuit.'a tire chief may utilize the circuit for sending sig nals by a Iilorse key at any time while a box is in the act of Stlltllllg' itscharacteristic or being transmit-ted. have been tin prolong'ed depression of the key to open the circuit will. lock out. the box wlneh is m the act. of sending its signal because the lockout device will engage beneath the sending lever as soon as the signal wheel l raises the same to non-sending position and the subsequmit makes and breaks o'l circuit produced by the op ration of the key will all'eet said box in just the same way that said box altects the operation of the olhei" boxes which have been pulled and as already deseribed; 'As soon as the manipulation of the key ceases. the circuit will resume its normal conditionand' the box whosepin it first reachesnormal posit-ion'will cut in on tlrocircuit and resume the sending of the characteristic signals of its round. The act' of looking out the box bythe first.- break ofeircuitproduced by the signaling key may, itisi't rue. mutilate one of the characteristic signals constituting the round ot Signals sent by said box. but he remaining eharacteristie signals of the round will be unmutilated and may be read upon the receiving tape.

'hat I claim as my invention is: g

l. In a non-interl'erence signal box. the combination ol' a signal transmitting mechanismuan actuating mechanism therefor-. 11 mechanical lockoutdevice adapted to mechanically engage aml lock-some portion of the Signal transmitting mechanism out of ope 'ation by the actuating mechanism, a main line magnet having an armature adapted o throw said mechanical lockout device into lockout position and means carried by the actuatingmeohanism tor restoring the lockout deri e to normal position to tree the signal transmitting mechanism at the-terminalion ot' each complete movement ot' the actuating mechanism requisite l'or sending a eomplete signal. I

2. In a non-interterenee signal box. therombination ot -a signal wheel and actuating mechanism tlieretor. a signal transmitting mechanism operated by the signal wheel and embodying a sendingleyer. a meehani cal lockout device adapted to engage with and lock the sending lever in non-sending position. said lockout de iee jbeingwithout bias and a non-interterence magnethaying an armatureadapted to' engage and throw .the loekoutdevice into locked out position its lockout position during subsequent moremerit ot the armature andaneans eontrolled by said armature tor intermittently' interrupting the movementof, the actuating mechanism of the box. at each subsequent interruptimi of the circuit produced by anolhcl' boX.

1 l. in a iion-intertereiice signal -box. the combination with the actuating. mechanism and signal transmitting mechanism. :ot' means for locking the signal transmitting mechanisi'n out of action when thebox is pulled during operation of another box onthe same cireuitand means ."tor intermittently interrupting thetmeration of said actuating mechanism at each interruption of the circuit" produced by another box while engaged in sending a signal.

5. In a 'non-interfere:ieesignal box. the combination ot-a main line magnet. means controlled thereby t'or preyenl'ing the box from sendingits signal during rotation of the. 'driying, or actuating mechanism-and means for interrupting the nm ement of said actuating mechanism at each interruption of the main line circuit produced by another box throughout its operation in sending signals.

ti. in a iuan-interterenee signalbox. the combination of an actuating mechanism. signal transmitting meehanisin. a magnetically controlled lockout for locking saidsignal transmitting mechanism out ol operation upon interruption ot" the mainline circuit from another box and means responsive to eaeh closure and interrupt-ion ot the main line circuit, due to the sending ot sigras from another box for intermittently interrupting the operation of the actuating mech-' anism in the locked out box.

7. In a noninter:terence signa ox. the

combination with the actuating train, of

means for freeing the same nal. a sending; mechanism operated thereby.

to send the siga magnetically controlled lockout for loclvlockout device controlled thereby for en gaging and holding the sending lever in inoperative position and adapted to retain its lockout position independently of the main line magi'iet. and means for automati' cally restoring said lockout to normal position when the actuating mechanism of the -mechanism of the stop inoperative to stop the train.

box reaches normal.

'9. In a norrinterterence signal box. the combination of a signal wheel, a sending lever actuated thereby, a mechanical lockout. device adapted to one go and lioldihe sending lever in inoperative position and means responsive to signals from a distant box for stopping the rotation of the signal vvheel and its actuating mechanism atv each interruption of circuit.

10. In a non-interference signal box. the combination of a sending; lever. an unbiased mechanical loclrout device theretor. means responsive to interruption of the main line circuit for throwing said lockout device into position tor engagement by the sending lever and'means connected. with the actuating box for restoring the un' biased lockout to normal position to tree said sending lever.

1.1.. In a nmi-intertereiice signal box. the combination with a signal transmitting device, of means responsive to-signals coming over the line for rendering the same inoperative, an actuating train and means for permitting intermittentoperation of the actuating,- train throughout the transmission of signals by another box and While the said signal transmitting device remains inoperative.

12. In a non-interference signal box the combination of an intermittently acting stop for the actuating train, a controlling ma net in the signaling circuit and means controlled by the sending" portion of the-box and acting at each signal transmission by said box for automatically rendering the 13. In a non-interference signal box, the combination of a lockout device, means tor rendering said lockout device inoperative at each normal interruption of circuit pro duced by a transmission. and llltitllSdhJl throwing said lockout device into lockout position upon prolonged interruption (at the main line circuit and to leave it in such position during subsetpient normal interruptions of the main line circuit pl'OtlllCGtl by another instrument. v

Ll. The combination in a non-interferencc signal box, of an actuating train, means con trolled by a magnet on the main line for per' mitt-innintermittent operation of the train throughout the transmission of signals from another box and means for holding the intermittently acting devicesout of operation during the operation oi? the actuating train in sending signals.

15/111 a non-intertercnce signal box. the combination of a sending lever. a signal wheel and a lockout device for locking the sending lever when raised by the signal \vheel. said sending lever being adapted to hold the lockout device out of action when the sending lever drops to send the signal.

16. in a non-interterence signal box. the combination of a sending" lever. a mcchanical. lockout device therefor inn-mall out of engagement with the sending lever but adapted to be thrown into position to engage and hold the same inoperative. an ac-' tuating' mechanism for operating the sending lever, amain line magnet controlling the position of the lockout device and means governed by said magnet for prmlucin; a delayed movement of the actuatingmechanism throughout its stages of movement.

wherein it is adapted to operate the stfllt'lilig.

lever.

17. In a non-intertorcncc signal box, the combination of a loclmut device. signal sending mechanism. means connected with the signal seinlino mechanism for throwing ott the lockout after each transmission of a complete characteristic signal. a stop controlling the movement of the actuating train and a magnet in the main line circuit for holding the stop out of action and means controlled by 'the sending mechanism for holding the step out of action at each individual transmission.

18. In. a non-interference signal box, the combination of a lockout device, a controlling magnet thcretor. an actuating train. means tor permitting intermittent operation oft said train in response to interruptions of 'main line circuit produced by another box while the said lockout device retains thc'.lockout PUSLtlUIl, mechanism for automatically stopping the actuating train when the box has completed its round of signals and means for holding said mechanism outof action at-the completion of the round, if the lockout device he at that time in lockout position.

19. In a. non-interference signal box, the

' into lochq circuit th eat ioinbii tion signai wheel,

e sending lever the compleinally shunted, means for opening said shunt 'autoiuaticuiiy when the box is pulled and necha. for throw in controlled bi 'said magnetn he shouldered-locking devic sition upon interruption of the magnet, occurring when the V we? is in lifted position.

at in non-.ntert'erence signal box, the conib'in n of a normally shunted main line magnet, a signal Wheeland actuating :nechanis i therefor, means for automatically breaking the shunt of said magnet when the box is started, sending devices mechanically actuated by said wheel, a lockdevice not wally mechanically disen i on": the sending devices and means for throwing said locking devices into position to reta n the sendingdevices in'inoperative pasidzion upon an interruption of the circuit thrnugh said magnet and throughout subsequent. ma es and breaks of circuit through said In L let, and means for releasing and stopping the actuating train at each make and break of circuit produced by anotherhox while said sending mecha nism is locked out of action.

21'. In a non-interference signal box, the combination of sending lever, a locking device adapted in one position of the send ing' lever to engage beneath and hold the same'lifted, and in another position to lock against and be itself held out of action, and a main line magnet having an armature mounted independently of said lockout device and. adapted to engage the lookout device {and throw it into locking position on signal, a mainline magnet normovement of the armature in one direction, said armature being free. to vibrate 'while the lockout device retains its lockout posii011; 1 I

In a: non-interference signal box, the combination of signal sending mechanism and an actuating train therefor, a lookout device for looking the sending mechanism out of operation, a main lineinagnet maintained in c'ircuitiduring the operation of the'box and adapted on interruption of saidcircuit at another point to bring the lockout mechanism into operation and means controlled by said magnet for stopping the,

movement of the actuating train at each interruption of circuit" produced by the normal signal transmissiensfrom another box.

23. Ina non-interference signal box, the combination of a lockout adapted in one position to prevent the transmission of signals and in the other to allow the box to act and transmit said signals, a'main line magnet having an armatureadapted to vibrate at each interruption and closure of the main line circuit and throughout the whole operation of the box, after the box is pulled, means connected with said arma- ,ture for throwing the lookout device into lockout position upon interruption of the main line'circuit and adapted to leave it in such position during subsequent interruptions affecting said magnet and armature and means connected with the transmitting mechanism for throwing oil .the lockout dey vice after the transmission characteristic signal.- p Signed at New York city in the county of New York and State of New York this twenty seventh day of January A. D. 1911.

cnonsn L. FOOTE.

of a complete l vitnesses WM. R STOUT, FREDERICK S. BORDEN.

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