US971327A - Triple-valve device. - Google Patents

Description

WALTER V. TURNER, or nncnwoon. PENNSYLVNIAQSSIGNOR iro Wrisi'rmc- *i House AIR- BRAKE COMPANY; or rrrrsaune, PENNSYLVANIA.; afooaronarlon or PENNSYLVANIA. w l

' 'LRIPLENALVE DEVICE.

I vTo all uho'm it mayconce1 1i -:v L y 1 service lapplication positionLl-svc.itliatfla local f Be it knoirn that-'I5 'ALTER V. TURNER, a reduction in train pipe pressure-,at .4 l.citizen of the United States. residingV at` triplezvalve is secured.; yInlforderltoobtain Y. Edgewoochin the county Aof Allegheny' and xa qiifiekrecliarge of the:fauxiliary:lfsemioirs' 'State o f Pennsylvania, have. invented new' tl'le r.lieneiriliefi'ire mentioned:communication 60 and useful Improvements 'in Triple-Valve between the t'raiii pipe and the sepaniteV Devices,f`of which the following isa speci- Chamber may be utilized toadrnittrainV pipe i,

. cation. Y y air to said chamber in :in-additional.release' i 1' Y This invention relates to automatic 'Huid' DOSOU f he Valve. parSyx'nWliich-a coi'iiy pressure brakes, andfhns for one of its ob- 'inumcatwn' 1S Opened beunSaiiySepa-mte 65 l gects to provide a' simple and compact form Chamber and the auxiliaryreserifoilwf#iwi of triple valve structure. This invention also -hasotlieuobjetsmiidng f i means in a triple valve device for grading fully described and'set fort-hi" ;"*'fi1 Y :l5 down brake Cylinder pressureafter :in ,ip-y -III ille {ICCOID'pInylng dlWllIlSgHFlgnle 2.1 70 'Y plication ofthe brakemand'another object vis 1S a diagrannnaticplan vieiwfaa car; brake; to rprei-'ide .improvednieans adapted to seeqlilpnient embodying the anvent'ionpFigs2-fg" f. "cure accelerated action ofthe triple vali-'es in a 'Central sectional View of the triple valve A `service applications of the brakes; and a still Clevlce, the parts being-:shown in :what is '29` further object is bo provide limproved means kIlOWll flS the quick echafilfllmfiomwhih 7 5 whereby the auxiliary reservoir may. be mafy'ils? be @retarded m1915142 -POSTOHF'Igquickly recharged. 1 3 axsimilairview of the mailnzportioarothesg `Heretoore, in order to grade down the lrMp1@- Vlle Wlthfhe pa'lltsnlm'l'fmllfuu m.' *y brake cylinder pressure after an application 1935 ROSIOH F'g 4 2! SXUHMYIQWWIHG X of the brakes', it has been proposed to vent. Pars ,m Sel'lce aPPhCfltlOlKPQS-mllf;'.iFlg"80 air under pressure from an additional source a 51" 131 VIQW SllOWmg the! poslton; ofmlie lof fluid pressure supply, suhQas-'a supple- P21115. 111 Service lap pos1tion; Figil61a-s1niigg mental reservoir, to the .auxiliary reservoir #lar "16W ShOWlnPI the posllpmflf'lie# pt l'fSfm and valve chamber of the triple valve device, the Hl-adlllted' Ilease'lap' 9051999; Flg- 7:41

in a position of the valve .parts in which a Slmllfll Y1eW-W 1 h the .Darts V1I1 `@fleligenqy 85 brakecylindr exhaust portis open, whereby Pphfltlon POSIQQU; Fig-#18WSmHlm'WiFW y the rise in pressure in tlie auxiliary reservoir ShQYlDg the v T) OSIIOD 0f tliegpartsannfzgiiick .1.5 -will move said valve parts and close the exlecliar'e D OSIIOH, COIIeSPOP'FllgV@ llgfi i haustporhbut in all these devices it is neces; but 'In' a digerent PliiHeJFig.' 9: afiaceuvaeiv .351 sa'rV to raise the pressure of the entire au:;il 0f, tue auxiliary or graouamisgmiaive; 'Fig'. 90.y e 'ar'v reservoir andthe connected valve cha-m- 1Q a face vlew of the mam Shdpwalve; and lier'. Flg. 11 a, plan view of theimam.valve:j seat .1?. Accordingto'iny present invention a sepa- ShOWllg the =}11`allg9me9t .thipqism rate chamber, ofsmall capacity, is employed-, Y The .car air brake l cqllipllbfl: QCOmPIlSeS 40 iiitov which air .from a supplemental reserf thc/fram plpe l, l'nilllcli plp`er2f,:tripleyalve 95 Voir, or other additional'source of fluid presdevice Comiell lly Dipe!) tothe auxiliary sure, may lie supplied. and in wliicli tliepres- 'reservoir 4 and liy pipe tolirzalgeeyliiiderua sure may lie varied independently of that ofv o, and also by pipe l to a1siippl'emental'res-v y the auxiliary reservoir, the cliaiiil'ier being so v"GWV El' (if 01 )lll' .OllfCkf'Of'Y N Slll'eilxc. f .45 arranged that the mOi-able ahnung-nt 01' n (fOlC- lllg t0 CQllSiI'llCl0n,: le tflplef'valve 10 portion thereof, -which operates the triple CUC? Qomlnlses the usualplstonchimbel .9

valve. is subject to the pressure `contained m containingtlie piston head-.510, and commu-5. 'said chamber. ln order to secure accelerated llltihng 'lll nl@ tml lllpethfnlgl'lfpassage y y'action in makingseilvce vapplications of the 2. In a nl efferlefl form oftlieln'i'eutmnftlie 'i 50 brakes. a passage between the train pipe u nd -usual valve chamber 8i consti.t-ugesutliiefsfepa-v lot said separate chamber isv provided. which 1=\'9 lllllllllf Pil folftlll? 123111059 74u31 contains aclieck Valve adapted permit air auxiliary reservoir opening isrclosedby: a. from tlie train pipe to fluir' to said chamber, `cap`1. l`he piston forcont-rolling the together with i-iieanszidapted .to vent air. moi'emer'itof the usual nl alnvSllfleiyalvev, f. Y from the 'chamber when the Valve moves to and :urxiliai-'y ohgiaduzitmg va'lyeltQGg-'colzi- .110

' -;z 'fuif ."n'1"i www prises ih c piston heads 1'0 and 11. Thepistjmnead Haris containetLin a piston chamber l2 iiitmerinetliate the valve chamheriS and the piston ehainlier 9.' passage 28, communiton, or ahutntcirt, is therefore su jectto trainV pipe pressure on one side and to auxiliary reservoir pressure and `the pressure con-l tained in a. separate chamber, in tliisrinstance,fthe val ve chamber 8, onthe other. The seat for thclniain valve is provided with` brake cylinder ports 31 and 33, auxiliary reservoir port 30, supplemental reservoir port 40, and'tlie exhaust port 21.` The main slide valve has through ports and 23,'

adaptedto register with auxiliary reservoir port and brake cylinder port 31 in service position, and a through exhaustport- 20. Ii'i addition the main valve liasath'rough port 27, adapted vto register with supplemental restart-oir port in normal release position,

and an extended tliroiwli'port 38 for con-l necti'ng the .valve ch'amrii p er in service position to a v enport, shown in this instance as the brake cylinder port 33. The auxiliary valve Q6 is mounted on the main slide valve in the usual Way, and'lias a cavity 25 adapted to' control the various ports 1n the main slide valve.. p Y

.The 4operation of the-invention is as fol-k i lovvs:-'1`he triple valve being in normal re,-

lease position, as shown in Fig. 3, the auxilf:

'-iary reservoir is clpp'gedto the standard pressure througlithe eed groove, around tlie-- piston: head 10, yin the' usual way, and air from the train` pipe flows through check valve 36 into they separate chamber 8, and-as the suppleiiiental!A reservoir port 2i' in kthe iiiaiii slide valve eoniiiiuiiicat'es ivith the port 40 in this position. it also hecoiiie.`- charged to standart pressure. In order to make a service application of the Iii-altes, a reduction Ais inade in the train pipe pressure in the usual ivay: .the auxiliary 'reservoir pressure on pistou' head lit and the pressure in the valve chamber on vrthe. piston head ll. cause the valve parts to assunte Athe .servire iositioii. :is shown inV Fig. i. in which auxiliarv reservoir port il() is connected to lnale cvli-iulerfport 3l h v port '2i'. eavitv 22' in the graduating valvejand port '2l-l: at theA saine time port 3'* is unem'ered hy the auxiliarv valve )ti and eotuiiiuniea-tes withpportv llfu'herelrv the pressure in f'iiatnlier S is i'educed. so that check valve Ilt' opens and air from the train pi-pe'lloivs into i ne eimnilieiri.A thence to the vent port 33. in this instant-e eonneeted to the iii-alte e'vliiulet. ln thisl nminier. :u local reduction in train pipe pressure at each triple valvel -is produced, which hasteiis the successive serial operation of the triple "valves throuvhout the trainiii the wellfknovvn \va v. n equalizationv of' pvesf sure on the triple pis'tmthe valve parts are 70 returned. to service lap position, as shownV in Fig.` in which the graduating valve '2G j closes the auxiliary reservoirl port :2'2 and the valve chamber ventport 38. Further reductionsin .train pipe' pressure may be 75 made, as' desired,faiid the above operation' I will `be 'repeated Y j y In order to grade down the brake cylinder pressure after an application of the brakes,"

thek engineers brake valve is 'turned' to re- -golease position and then back to lap. VThe resulting increase in. train pipe pressure Vmoves tlie triple piston to normal release position, as shown in Fig. 3. In this po# sitionof the valve parts, the brake cylinder 35 is open to the exhaust through the port 23,

*cavity 25 inl the graduating valve, arid exli-aust', port 20. At'the saine time, the auxiliarv valve 2G uncoversport It' in the niain slide valve, which registers i-ii this position with the port 40 communicating with the additional source of pressure supply, so 'thatv air from said additional source flows into the chamber 8. The resulting increase in the chamber pressure 'moves the triple pis- 95" ton over sufficiently to cause the graduating Vor auxiliary valve "26 to close the exhaust porti() in the main valve and .alsotlie presr sure supply port- 27, as shown` in Fig. (i. Iii

order to further reduc'.` the brake cylinder 10i)v i pressure the train pipe pressure ma) be again increased and the ahove described operation tvill be repeated.

j- I n grading'dowii the brake cylinder p res-v sure, as hereinbefore described, the triple 1o.;4

piston moves to release position, in which 'the chamberV S is cut off from the auxiliary reservoir, as shown in;1"ig.A 3. so that-in order to provide for a qtiieltrecliarge of the. l

auxiliary reservoir.l an additional release'po- 110 sitioii is providedto which the triplepiston may he moved. and in which a port from the auxiliary reservoir is opened to the separate elianil'ier. or valve rliantlfiet' whereby air from the tratti pipe flowing h v the elieek valve tt', into the elia'inlier will rtw'liarge the auxiliauvpreservoir. ln order to norniall'v iiiaiuta'iti the triple piston in the nor inalielease position. a vieldiug resistance device 1S is provided'. tvliich'opposes the in 120 ward inovempnt of the valve parts to .said additional or extreme position. as slimvn in Fig. 2.

ln operation. an itierease'is made in train pipelTi-'essure and-fthe tripie pistoii is shift; 325

ed. :tml the spi'iit; r of tht` yielding resistantdevice lH is eoinpt'essril. so that the piston i assttniw the Vposition as shown in hij, 2in which the auxiliar) reservoir port 3H is uu- -overl hy the main slide valve. and nir 130 from the train pipe entering 'the chamber 8 through th'e. check valve passage 35 Hows into the auxiliary reservoir. As the pressure onv the `triple* piston equalizes, the vielding sprinvdevice 18 returns the. valve parts to normalrelease position, in which the aux- .iliaiy reservoir port 30 is' closed.

If it sdesired to secure a retarded release the exhaust port toA the brake cylinder may .in Fig'. 'i'.A In this position, a large port 33,

, -assume the normal release position, in which open. Y y

'In order ltom'alie an emergency applica;

the exhaust from the brali;r cylinder is Wide i tion of the brakes, the usual heavy ret ncti'on in train pipe pressure is made.` and the triple Y piston moves to its outer extreme position.`

and seats on the leather gasket, as shown to the brake cylinder, is uncovered,` and air from the train pipe tlowsbv the check valve 36 tochamber 8, thence by way of port 33 Having now described myi to the brake cylinder.- A feed. groove. around the piston head 11 is also opened in.

, this position, so 'that air from the auxiliary reservoir flows 'from the passage :28 through said feed groove into .the chamber 8, thence v Amore complicated structure.

to the brake cylinder through the poi-t It will thus be seen that l have provided vval'c'ompa'ct triple 'valve device of few parts,

which isadapted 'to grade the brake vpres-t sure up or down, and having quick recharge and quick action y in emergency features; .these featuresheretofore iequiring a much "nvention, what I claim as new and desire to secure by Let- 1.. triple' valve device for siipplyingiair "'from the .auxiliary reservoir to ,the brake cylinder, comprising a 'piston adapted tonbe controlled in its movement by the opposing' pressures ofthe train pipe in one direction]` and theauxiliary reservoir and a separate source of fluid pressure supplyin theoppof .site direction.

i v2. A triple' valve device adapted tosupply Vair fromthe auxiliary reservoir to the brake f cylinder in service applications,comprising a piston operated in one direction bytrain pipe pressureand in the other by auxiliary reservoir pressure and pressurein a separate chamber.

3. A t'riple'valvedevice, comprising a piston having tivo abutments, one of which is subject tto the. opposing pressures', Ypf-It'he, traiu'pipe'and auxiliary reservoir', ndtli other abutment ofwliicli is. suliiect.' to th` pressure in a separate chamber a main f 'valve and anlauxiliary valve having a, move-V ment relative to the niainvalveand oper.- ated. by said piston for controllinr the admission of fluid to the, brake cylin ci'. 4. A triple valvedevice, comprising a piston and means operated by said piston for controlling the supply of airfrom the auxilf iary reservoir to the brake 'cylinder in servf icev applications of the brakes, said piston 15 being subjectfon one side to train pipe presy Y sure and on the other to auxiliaryreservoir y pressure and to pressure from a separate source. K 5. A trip-le valve device,'comprising a go .movable abutment subject to the opposing pressures of the train/pipe and the auxiliary reservoir and a yseparate chamber, means forcstablishinV communication from `the train pipe to sai chamber, and means operated by-said movable abutment for controlling a vent port from said. chamber.

-6. A triple Vvalve device, comprising a, movable abutmentsubject to the opposing pressures of the train pipe and the auxiliary 9o reservoir and a separatel chamber, means forv v -4 establishing 'communication from the train. l' 'y pipette said chamber, and a valve mechanisin operated by said movable abutment for. controlling a vent` port from said chaniy ber.

. 7..' A triplevalve device, comprising a" movable abutment having two piston heads,

one subject to the opposing pressures of the ktrain pi e and auxiliary reservoir, and the. 10o other suliject to pressure in a separate chan. ber, means for establishing communication from the train pipe to said chamber, and means operated by said movable abutment "for opening a vent from said chamber.

8. A 'triple valve Vdev-ice, comprising .a

movable abutment siibjectftov the opposing pressures of the train pipe and theauxiliary reservoir and a separate chamber, means for establishing communication 'frein-the train '110 pipe Ato said chamber. mea'ns operated by vsaid ni'ovable abutment for admitting air to the brake cylinder and for opening ay v'cnt from said separate chamber. u

y 9. A triple valve device, comprising a movable abutment subject to theopposing. press-rires' ofthetrain pipe and the auxiliary reservoir and a se arate cli-amber. a passage containing a-che r valve for' admitting. air from the 'train pip'e to said separate chant-` 120 lier, a valve mechanism operated b v saut movable abutment upon a reduction in trainipe pressure to admit fluid pressure tothe.

rake-cylinder and to open a veut tofsaitl. separate chamber. l'12:'

10; Atriple valve device, comprising a movable abiitiuent"subjet to the opposing'v pressures ofthe train pipe and` the auxiliary -rasca-voir. and a separate gvalve l-haiuber,

iiieans for admitting HuiiLpi'essure from the .130

train pipe io ibe valve cliamlwr. aiid a valve unch-.iiusiu operaie-l b v said movable abutment ior controlling the lluid pressure sup-y i and loopen avent l'roui said valve'chamber.

, 12, in au autouuitic fluid pressure brulie `s vstcm. the coii'ibination. \vi tli a train pipe, auxiliary ieservoiipaiul brake cylinder. of a triple valve device coinprisiimY a movable V abutment subject to the opposing pressures ot the trainpipe and the auxiliary reservoir and a. separate valve chamber,V said abutment having' a passage containing a clieclt'valve, ft'iijsupplying air from the train pipc'to said valve chamber, and a valve .mechanism operated by said abutment upon a reduction in train pipe pressure to admit air to the brake. cylinder and to opeii a vent from said valve chamber. v f

130 13. A triple valve device, comprising amovable abutment having ditfercntial heads:

subject to theopposing pressures of the train 'l pipe in one direction and the auxiliary reservon' and the separate valve chamber in the opposite direction, means for establisl'iing communication from the train pipe` to said separate valve chalutier. and a valve niccli- .anisiiifoperated bv said abutment upon a 'gradual reductionin train pipe pressure for 40 supplying air from the auxiliary r rvoir `to the. brake c vlinder and 'for venturi;r air from the separate valve chamber.

ll. A triple` valve device. comprising a movable abutment having q lifl'erential heads subject to the opposingv pressures of the train pipe in lone lirection and tlie'auxiliaiv rcservoir and the separate valve chamber in the opposite direction. means for estat-lishing communication from the train pipe to said separate valve chamber. and a valve mechanisni ope att-db v said abutment for i controlling;r the supply of air from the anx- 'iliai'y reservoir to the. brake `cylinder and.rv

from the separate valve chamber to tbe brake cylinder in service applical ions of the brakes. f

15j. A triple valve device, comprising a` valvil and an auxiliary valve. with separate A f ports lor controlling the suppl) of air fromA the auxiliary` reservoir to tlielu'alte. cylinder and from 'the valve chamber to the brake.

tti; ln an automatic fluid pressure. brake; vsii-item. the combination. with a train pipe', Vauxiliary reservoir, brake cyliiidei'aiid an c vlinder in service applications.

additionalv source -of fluid pressure supply, 'ita triplevalvc device comprising a mov- 'able abutment subject tothe opposing pres-- sores4 'of the train pipcfand the auxiliary j reservoir and a separate chamber, means op erated bv said'movable abutment, when the train pipe; pressui" is increased, for releasin; air from the brake cylinder, and for y .auiplvinguair from saidl additional source of fluid pressure supply to said separate f chamber. v

1T. In an automatic fluid pressure brake- A.sys-teni, the -coinbinatiom `with a 'train' pipe, :uixiliar 'v reservoir, brake cylinder and an additional source of fluid pressure supply,v of a triple valve device comprisinga movable abutmentV subject to the opposing pressures off'thetrain pipe and the auxiliary reservoir v and a separate chamber,l a A valve mechanism operated bv said movable 'abut-1.

inent,'\vlieii the train pipe pressure isilicreased. for releasing air from the brake .cvlindcn and for supplvingaii' -from said f ac'lditioiial source ofv llui'd pressure supply to said separate chamber. s

l5. In an automatic fluid pressure brake.`

system, the combination, with a train. pipe, auviliary ri'rservoir, brake c vlmdei' and :in

additional source of fluid pressure supply,

ot' a triple valve device comprising a mov- 'able'abutment ysubject to the ol'iposing irelss sores of lthe train pipe und the Aauxi iary yreservoir and a separate valve chamber.

valve mechanism operated by said movable abutment, when tlie'train pipe pressure is f increas.\ L for releasingjair from the brake Vcylinder, and for supplying,r air from said additional source of fluid pressure supply to said sci iarate chamber.

f f if). ln an automatic fluid pressure brake system, the combination, with a train pipe. auxiliary reservoir, brake cylinder and .an additional source of lluid pressure supply, of a triple valve device comprising,r a movable abutment liavinlgr tivo differential heads subject. to the opposingr pressures-of the. train pipe and the auxiliaryrewrvoir and a separate chamber, means operated by said movable abutn'icnt. when .the train pipe pressure increased,'for ieleasiii'r air f-roni'the b alie cvlimler. and for supp .viugair from said'additional source of fluid pressure .suppl to said separate. chandler.

10. .\v triple Avulve device. cmupriujng n movable abutment. subject to tbe oppoLinLr pressures of the train pipe in one direi-tion 'and the auxiliary reservoir aml :l calm-i0 lim.

"chamber in the other, and meansV operated means for opposing the further inward by said abutment upon an increase in train pipe pressure to ielease air from the brake c 'lindei; and to supply air to said separate c amber.

2l. A tri-ple valvev device, comprising'a v alve and iiston for opening communication from t e brake cylinder to the exhaust yand from the tiain pipe to the auxiliary reservoir when in normal release position. and having -a' further inward movement for openingaiiadditional feed port to the auxiliary reservoir, and 1 yielding resistance movement of the valve beyond normal release position.

2:2. A triple valve device, comprising a valve and pistonV for opening communication ,from ther b alie cylinder to the exhaust,

and from the train pipe to the auxiliary res- .ervoir when in normal full release position.

release position. 23. A triple valve device, comprising a movable abutment subject to the opposing --pressures of the train pipe in one direction and the auxiliary reservoir and a separate chamber in the other, a valve operated by said'abutinent. for controlling a brake cylinder exhaust port and having a. normal release position iiiwhicli said valve opens a communication to said separate chamber fronian additional source of fluid pressure supply, and an additional release position in which a communication is established between said sepa-rate chamber and the aux- `iliary reservoir,` and yielding' resistance means for returning said valve to normal release position.

. 2-1. A triple valve device, comprising a movable abutment subject to the opposing pressures of the train pipe in one direction and the auxiliary reservoir and a separate 4chamber in the other, a valve operated by said abutment by an increase iii train pipe ressui-e for opening a brake cylinder exliaust port; and having a normal release po- Sition in which said valve opens a communication to said separate chamber from an additional source of fluid pressure supply, and an additional release position in which aconiinunication is established between said separate chamber and the auxiliary reservoir. and yielding resistance means for returning said valve to normal release position.

25. A triple valve device, comprising a movable abutment subject to the opposing pressures of the train pipe in one direction and Hw auxiliary reservoir and a separate movement of the. vavo beyond normal ull"- chamber inthe other direction. and means operated b v 'said abutment. upon variations in. train pipe. pressure, for controlling the admission and release oftluid pressure to and from the brake cylinder.

26. A triple valve device. comprising a movable abutment havingl differential piston heads subject to the opposinglr pressures of the train pipe in one direction and the auxiliary reservoir and a separate chamber in thel other direction. and means operated by said. abutment, upon variations in vtrain pipe pressure. for controllingr the admission andthe release of fluid pressure to and from the brake cylinder.

QT. A triple valve device` comprising a movable abutment having diierential piston heads subject to the opposing pressures of theftrain -pipe in one direction and the auxiliary `reservoir and a separate valve vchamber in the opposite direction, and means operated by saidabutnient, on variations in train pipe. pressure.l for controlling the admission to and the release of tiuid pressure from the brake cylinder.

2S. A triple valve device. comprising a movableabutment subject to the opposing pressures of the .train pipe in one direction and the auxiliary reservoir and a separate valve chamber in the; other. and a valve mechanism operated by said abutment, on

variations in train pipe pressure. for controlling the pressure in the'bralte cylinder.

:29. A triple valve device. comprising a movable abutment .subject to the opposingr pressures of-the train pipe andthe auxiliary reservoir and a separate valve chamber. and

a valve mechanism comprisinga main valve and an auxiliary rvalve mounted thereon. operated by said abutment by `variatioiis iii train pi pc pressure. for controlling the brake cylinder supply and release ports. 0

3U. A triple valve device. comprisingr a movable abutment subject to the opposing pressures of the train pipe and the auxiliary reservoir and a separate valve chamber, and a valve mechanism comprising a main valve,

,said main valve having a brake cylinder service port and au exhaust port controlled the auxiliary valve and operated by said abutment by variations in train pipe pressure.

31. A ti'iple valve device. comprising a piston Vsubject to the opposing.r pressures of the train pipe in one direction and the auxiliarvreservoir and a separate chamber in the other, a valve operated by said piston upon an increase in train pipe pressure for open-v ing communication from the brake. cylinder to tlieexhaust and from the train pipe. to the auxiliary reservoir when in normal release position. and having a further inward movement for opening an additional feed port' to the auxiliary reservoir, and yielding resist.

alice means for opposing the further inward Alos.

iisy

Cil'.

Limovement `of the vaive beyom'iiormal re-A lase position. .y A. triple valve device. comprising a: movable abutment having differential piston heads subject to the opposing pressures of they 'am pipe iii one direction and the aiixilv f ,iary reservoir and a separate valve chamber cation between the train pipe and said. separate chamber, and'i'ueaiis operated by said.` abutment upon au emergencyreduction in tram pipe pressure, for establishing c0iumunication between Said chamber and the brake 'cylinder and betueeiithe auxiliarv t reservoir and said chamber;

l '34. Atiiple valve device, comprising a movable abutmentsubject to the opposing pressures of lthe-train pipel in one. direction, and the auxiliary reservoir and a separate valve chamber m the other, said triple valve device having a passage containing a check valve for controlling the admission or air from the tra-in pipe rto said chamber, anda valve mechanism operated by said abutment, upon an eiiiei'gericy reduction in train-pipe pressure, for establishing communication between said chamber and vthe brake cylirider. Iii testii'iioiiy whereof have hereunto set my hand.v

, v .WALTER V.' TURNER.- Witnesses: Y e i R. I". EMERY, Y J. B.VMAcDoN\LD

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