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Патент USA US2132915

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Octwll, 1938.
B; s.' ,MKMANA
-
2,132,915
EMERGENCY ’VALVE DEVICE
Filed May 26. 1936
`
lNvEN'roR
BURTON '5. AIKMAN
BY W
ATTORNEY
ì
`Patented YOct. Í 1, >>ÍÍQÍS
i 2,132,915
¥ ; VUNITED lSTATES PATENT lÓFFICÈl
Burton
e VEivnmGENcY
S. Aikman,"k Wilkinsburg',
VALVE lDnvlci'i
¿Pìa., assignfor
to The Westinghouse Air Brake Company, Wil
` merding, Pa., a"corporationy of Pennsylvania
Application May 26,. 1936,> SPI‘Íal'iNO.~ 81,863
aznclairmvs.’> (dp303-_42) `
This invention relates to a fluid pressure brake
equipment and more particularly to an improved
brake controlling valve device.
`
"
In some types of brake systems heretofore de- ’
5 veloped there have been provided emergency
valve. devices subject to the opposingpressures
of -the fluid in the brake pipe and'of the fluid
in a pressure chamber forventing fluid under
pressure from the brake pipe and for supplying
an emergency valve’device responsive to differ
ences in theV pressure of the fluid in the brake pipe
and in a pressure chamber and which is so con
structed that it `will always operate >in response
to substantially the same pressure differences.
5
IA >further¿object of» the invention is to provide
an’A emergency valvedevice whichwill require a
minimum.- of attention to keep it in proper work
ing
condition.
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>
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10 fluid V.under pressure tothe brake cylinder on a
*Another object of l the-invention is toprovide 10
reduction* inthe pressure of the fluid in the brake . an- emergency fvalve device which is -constructed
pipe atan emergency rate.
`
-f-
~
l - ~
These emergencyïvalve devices have incorpo
rated means for releasing ñuid under'pressure
and'varranged Asof'that `>it may be employed in
place ofwthe valve devicesnow in use» and vwhich
operates inthesame manner as the' valve device
15 fromthe pressure chamber during a reduction'in i which'it replaces. ` ~
.
y
15
the pressure of the ñuid in the brake‘pipe-at a
Otherobjects
of
the
invention
and
>features
of
service rate in order to prevent the development novelty will be apparent» from theA followingde
of suñicient difference inthe pressure of theiiuid V>scriptionïtak'en in connection with the accom
lin the brake pipe and in the pressure chamber panyingy drawing, in which
20 to cause the emergency valve device to move to
Fig. 1 is a fragmentary'view, largely in section, 20
` the application position.
g
,
, ~
of a Ybrake'equipment incorporating an emer-V
It for any reason the operating` elements .of
the emergency valve deviceshould oifer a high
frictional resistance to movement, on a reduction
25 in the pressure of the fluid in the brake pipe at
. a service rate the valve device may not moveto
the position to release ñuid under pressure `from
the pressure chamber, and because of the con
gency’valve’device embodying this invention, and
gFig. 2 -is asectional'view taken substantially
along the line 2_2-’of Fig. 1. "
.
r
' >lîieferring to the drawing, the brake equipment 25
therein ~illustrated comprises a brake pipe I, a
brake cylinder?, an auxiliary reservoir 3, an
tinuing-reduction in the pressure of the -fluid emergency reservoir-_4, ,and a brake controlling
in the brake pipe the pressure diiîerential Vbe`-- valve'device indicated generally by the reference
’
'
j
30
tween the pressure chamber and the brake pipe numeral 5. '
The
brake
controlling
valve
device
5
comprises
will increase and will eventually overcome the
resistance to movement of the valve device. The apipe bracket section 1 having a mounting face
pressure diiîerential between the brake pipe and formed-thereon against which is secured the
3.5 the pressure chamber may then beso great as to emergency valve device I Il provided by this inven
cause the valve device to move to the application tion.` ¿The pipe bracket sectionk hasA formed 30
position, thereby producing an undesired emer
thereon another" mounting face, not shown,
gency application of the brakes.`
,
Y
It is an object of the present invention to pro
ip) vide
A further
an improved
object emergency
of the inventionY
valve device.
is to provide
"
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45
against which is secured the service portion of
thebrake controlling y-valve device, this portion
not4 beings shown in theT drawing. .Y
g The pipefbracket section 1 and the service por
an 'emergency valve device which employs a dia-V
tion, vnot shown, ofthe brake controlling valve
phragm in place of the piston
device 5`are identical in `construction and opera
which is employed »
in the valve devices now in use.
40
tion with theffcorresponding »parts of the brake
e
»Another object of the invention is to provide
an emergency valve device which employs poppet
controllingvalve device shown in U. S. Patent No. 45
2,031,213, issued February 18, `1936, to Clyde C.
typevalves instead of the slide valves which are>
Farmer, while theemergency valve device I0 pro
employed in the' valve devices now in use. ‘ .
vided by'this invention'is intended to operate in
A further object of the invention is to provide place of the emergency portion employed in the
50 an emergency Valve‘ device in which the sliding vbrake controlling valve device shown in the above 50V
and friction areas in the device are reduced toga
minimum, whereby the valve device Vis very sen# .
sitive to variations in the pressures to which it is
intended to
respond.
.
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55 . Another object of theinvention isto provide
identiñed patent.A
,
'
The emergency valve -device I0 comprises a
movable abutment in the form of a diaphragm I2
which may be formed integral with a gasket I4
which is'clampedbetween the body of the emer-' 55V
2
gency< valve device I8 and the pipe bracket
spring 14 until the valve l2 ismoved into engage
section'I.
The central portion of the diaphragm I2 is
ment with its seat.
This emergency'valve device Vincludes a vent
valve mechanism operative on the supply of fluid
under pressure thereto to vent fluid from the
As shown in the drawing this valve
mechanism comprises a piston 88 which is
mounted in a 'bore in the body of the emergency
valve device I8, and which has at one side thereof
a. chamber 82 which is constantly connected by 10
Vway of a passage'84 with a valve chamber 86
in which is mounted a poppet valve 88 which is
urged to the seated position by means of a coil
spring 88. The area on the opposite'side of the
secured between the flanges I6 and I8 on a stem
28. One end of the stem 28 is slidably supportedV
in a bore in a guide v’member 22 which is secured
to the body of the emergency valve device, while
the other end of the stem 28 is slidably sup
ported in a bore in ay valve ‘device 24 which is
reciprocable in a bore in the body of the emer
gency valve device IIJ.
.1
.
rThe diaphragm I2 is subject on one side to> the
pressure of the fluid in a chamber 26 which com
municates by way of a passage 28 in the pipe
bracket section ‘I and the branch pipe 38 with ' piston 88 is open to the atmosphere by way of a
the brake pipe I.
"
'
,
.
passage 92, while the body of the emergency valve
'I
device I8 has a groove 94 formed therein which
The diaphragm I2 is subject ‘on the other side
to the pressureV of the fluid in the chamber 32
which is in constant communication with the
in one’position’of the piston 88 extends around
the piston so as to'establish communication be
tween the chamber 82 and the atmospheric pas
20 area on the face of the diaphragm I2 by way of
passages 341through the guide member 22. 'I'he
chamber32 is also in constant communication by
sage 92.
way> of a passage 38> with abquick action chamber
38 formed in the pipe bracket section ÍI.
Y
and one Vend' ofthis chamber is closed by means
pressure from the chamber 82 around the periph
ery of the piston in one position of the-piston.
restricted passage 44 ,whichcommunicates with
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The piston 88„has a stem I 84.1 formed integral
'ï'he‘valvekdeyicej24 includes a poppet> valve 48
carriedîby a stem 48y which is mounted in a bore
therewith', while a vent valve |86 is secured on
in the stern 28, the .valve >48 being positionedin
the stem |84. .The vent va1Ve`|86 is mounted in
a chamber |88 and carries a sealing gasket ||8
the vchamber 48 and being adapted to seat on a
munication Ybetween the chamber 4|)Y and the
which is adapted to_ engage a seat'V rib ||2.r A.The
vent valve |86 is urged to the seated position by
chamber 32 through k.passages 58. ,
means of a coil spring I I4.
seat formed on the` stem 28»so as to control com--V
35
i' .
`which is in constant.communicationâ'by,way Vof
passages 54 withfthe chamber 32.' g
`A .spring 58 is positioned in the chamber 52 and
extends between the valve device 24 »and a
Vshoulder on the stem,28 and yieldingly urges the
‘ to the brake pipe I and-to the chamber 26 on
The `emergency valve device .I8 has associated
therewitha double Vseating poppet valve device
indicated generallybythe reference'numeral 88
and controlling communication between a cham
Y ber 82 on the face 'of the'valve device 2,4 and a
chamber 64.v The chamber B2 is in constant com
. munication by way of a passage 66 kwith the
chamber52 in the stern`28, while the chamber 64
communicates with the atmosphere by Way of v
a restricted. passage 68.
,
‘A
Y `
v
The double seating poppetrvalve device G18 com
prises' a fluted stem' mounted in arbore in lthe
body of the emergency valve device I8 and having
at one end ‘a poppet valve 'I8 which?is adapted to
seat upon a seat surrounding the bore in whichV
60
Y
branch pipe A38 leading to the brake V`pipe I. The
chamber |88, therefore, is constantly yconnected
` valve ’device 24 in a direction tov move the poppet
@valve 4S `to the seated position.
the face of the diaphragm t2. n
The body of the emergency valve device I 8 has
|24 formed therein in which is
mounted a spill-over check valve- |28 which is
urged by means of a spring |28 into engagement
with a seat rib |38. The chamber |32 within the
seat rib |38 contains a ball check valve |34 which
is adapted to seat upon a seat surrounding a
a chamber
passage which communicates with the passage 36
and thereby with the chamber 32 and the quick
action chamber 38. The chamber `|24 is con
stantly connected by way of a passage and Ypipe
|36 with the emergency reservoir 4.
v The emergency Valve device providedby this
the stem is mounted-and having atïthe other end Vinvention rhas associated therewithan inshot
a poppet valve ïZ-vvhich is adapted to Vseat Vupon> valve Vdevice indicated generally by the reference
numeral |48 which operates on- anV emergency
application of the brakesto'reduce the rate of
*TheY double seating poppet valve device- 68 has flow of ñuid to the brake cylinder‘after the pres
ysure of the ñuid in the brake cylinder has in
65 associated therewith a spring 'I4 which yieldingly
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urges it to the right` as viewed in Fig. 1 of the creased to a predetermined value. »
a seat surrounding this end of the Ybore in which
the stem vof the'valve device ismounted. y
drawing,y so as to /cause thevalve 18 to engage
Y- As shownin the drawing,vthe inshot valve de
The spring'ïll andthe spring >56 are
vice I48 comprises «a valve|42 which .is4 mounted
proportioned Vso that the spring 'I4 is substantially
70 weaker than the spring 56.
in a chamber |44 and which is urged towards a.
seat( rib |48 by means of a c’oil spring |48» so as
its seat.
ì AThe valve '5280i thepoppet valve device 68 is
adapted to beY engaged by the'valvedevice 24
so that on movement of the‘valve devicel 24 to the
left, as. viewed in Fig.` -1 of the drawing, the
poppet valve k,device 8|) is. moved'v against the
30
yThe >chamber |88 in which the vent valve |86
is mounted is constantly connected by way of a
passage I I8 with a chamber |28, and this chamber
is constantly connected by way of a passage' |22 40
with the passage 28 to which is connected the
. The stem 28 has a chamber.52 formed therein
Y
I
piston 88 to prevent'the escape of fluid under
, lof a threaded p1ug¢42 through which Yextends va
the chambers" 28 and 48.
'
associated therewith and carrying a seat rib |88
which is adapted to be engaged by a face of the
'The stem 28 has a'chamber .48 formed therein
30
’
lThe >piston 88 has a restricted passage 96 eX
tending therethrough, while the body of the emer
gency valve device I8 has an annular .gasket 98
to` control'- communication between the chamber
|44 and a chamber |58 by way of a passage '|52
' of relatively large ñow capacity.
»
~
A passage |54 of restricted ilow capacity is pro
vided 'between the chamber. |44 andthe chamber
2,132,915
|50iand which by-passes the passage controlled
bythe valve
|42.
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fÍï
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3
passage .~ |56-.which`| communicates with a port
-
in,the'-s'ezatt’fof`- the main slide valvev of the service’
VThe chamber |441isfconstantly connected by
portio'nïuzif»v the 'brake- controlling valve device.
way of a passage |56 with aport in theseat of the v ~ ¿Theîa'reaputwardly of- the seat rib 200 com
main >slide valve of the service portionfo? the valve '
device
(not shown).
'
Y
i
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municates?with -.the brake cylinder 2 by way‘of a
chfcikeï2|l4i and the passage ‘and pipe |69.
l
The body of the emergency valve device |0 has
„ i-,Whe‘n the' valve |84 is in the open position the
brake cylinder 2 is connected to the inshot piston
^ a bore therein in which is mounted a piston' |58
having ~secured on a face thereof a sealing gasket
|68 which is adapted to seatV upon a seat rib |62
surrounding a chamber |64 kwhich isin constant
communication with the chamber |50.»`=
4volume |16=and alcommunication in the form of
a passage 208 vis provided through which iiuid 10
under pressure may- iiow from the volume |16 to
-
the ¿brake` pipe;V Thisïpassage has associated
The other'face-of the inshot lvalve piston |58 therewithfan acceleratedßrelease check valve to
has an annular seat-rib |66 formed thereon which' prevent back Iiow of fluid from the brake pipe
is adapted to `engage a sealingïgasket |68-`asso- , to the brake‘cylinderthrough this passage;
ciated with the body ofthe valve device.
-¿ Asshown in the drawing` the accelerated re.
‘ The chambers |64 and |50 are in constant com-`
lease -check valve' comprises a valve 2 |0 which is
munication with the brake cylinder ,2 by Way of mounted in the Vchamber «| 20 and isV urged by
apassage and pipe |69; «i
20
*
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.»
' means4 of Ya spring 2| 2 intol engagement with a
'I‘he inshotvalve piston` |58 hassecuredïthereto
seat rib 2 |4 :surrounding a chamber 2|6 in which 20
a stem |10‘and the valve -'|42 is >carried bythis
adaptedto ¿seat upon" a seat which» surrounds the
stem;
„ The chamber
~ ,
|12 Within
. „ the
L
.seat
a _~: rib |66'on
21.11;,the
endfofï'the=»pass`agev 208.
face of the inshot valve piston |58 is Aconstantly
ï
`
- A'
-' The-,valve ydevice-'provided"by*this invention
includesiae‘ipöppet valve to control the supply of
connected by way of apassage |14 with an inshot
piston volume |16 and'with a'valve chamberâl’la. _ ñuidjunderfpre’ssurevfrcmfthe emergency reservoir
A spring |80 is mountedïinthe chamber |12 4to the‘br'akeïcyflinder 2; » 4As'shown in the draw
and yieldingly urges the `inshotvali'le piston |578 ' ingthere‘ isa vpoppet valve 220 which is mounted
to the right, as viewed in Fig.- 1 of the drawing, in- a chamber -222 and "which controls communi
so that theV sealing gasket |60 engages Ythei-seat Y '
cation between vthe chamber> 222' and- the cham-Y
ber |86;l The valve 220 ¿is urged to the seated
proportioned vso that the spring |861' exerts asub'-, .position by «means »of `a spring 224, while the
stantially greater force on the-inshot valve piston" chamber'2'22 is Iconstanlily-'connected by `way' of a
|58 » than does the spring |48; which Y’operates
passagev226 with the »passage |36 and thereby
rib |62. The spring |80Yand'the spr-ing; |48> are
' Athrough the valveV |42 andthe stem |V10.-f f» l v
.
f .The body of the emergency valve devicelû has
a groove |82 cut therein Whichrcommunicates
v with the area outwardly of the seatrrib |66 ,on
the piston |58k and the area on the opposite side
withthe emergency reservoir 4. '
` - This emergency'valve device includes means
operated‘by the diaphragm |2 for controlling they
valves 88, |84 'and 22|).` This meansV comprises a
shaft l230 which is vjourn’aled in a bore ‘which ex
tends through» a wall 232 which separates the 40
chamber 32 and the chamber |86. The shaft 230
means for controlling the supply of iluid under» is‘ Varrangedl to closely ñt the bore in which it is
pressure from thebrake cylinder'2 to the chain-f` mounted and the portion of the wall 232 through
ber |12 on the face of the inshot valve piston- Whi-ch'thisÍ .bore extends is-preferably relatively
45 |58 in order to regulate the operation ofthe in
thick so 'as to provide a long bearing surface for 45
the shaft 230 and thereby reduce to a minimum
shot
This
valvedevice.
valve meansx{comprises
A
,- apoppet-valve.
"
|84
the flow of-fluid between the chambers 32 and '
mounted in thechamber |18 and having a ñuted
stem which is positioned in a passage extendingA
lThe end‘of the shaft 230 which projects into
from the chamber |18 to akchamberv|86 which theY chamber 32 has mounted thereon a rocker
is in constant communication with vthe brake arm indicated generally by the reference numeral
40 of the piston outwardly of the seat rib 162.'.
The .emergency valve device ' |0 lincludes . valve:
|86;
cylinder 2 by way of a passage |88 and the pas“,-v
234.
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The rocker arm 234 has a hub portionhav
sage | 56 leadingto the chamber; |44 Aof the‘inshot ing a-,bore therein 'which is closed at its inner v
valve mechanisml The valve |84 is'yieldingly -' end and into which extends the endof the shaftl
urged to the seated position by 'means `of `aV spring. ’ 230. `~ The Y»rocker arm `234 is secured `on the
. shaft`236by means of `a key 236 which prevents
|85».
The emergency valveY device .provided` byy this
relative »rotative movement between the rocker
invention includes a timing valve. device which Yarm 2í|4fand~> the shaft 230, but permits move
operates during an emergency application of the ment 'of these members relative to each other
60 brakes to increase the rate off'ñow ofV fluid under
axiallyof` the shaft 230. `
v
p
.
pressure tothe brakeY cylinder after .qa , time
intervalI
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As shown in the drawing rthe timingvvalve
vice, which, is indicated generally by the refer->`
ence numeral i |90, comprises a movable abut--,.
ment in the form of a diaphragm |92, which is
subject on one .side to the pressureo'f the ñuid `
" A sealing gasket 238 is mounted on the shaft
23|! 'between the rocker arm 234 and the wall 232,
While the- rocker armf234 is‘urged by means of a
spring-240 against the sealing gasket 238 so as
to compress this gasket between the rocker arm
234 and the wall 232'.
.
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f
Theîrocker arm 234 hasl formed integral there
in a chamber |94, which is in constant communi,-V ~ with an> arm 242 which is adapted to engage the
cation by Way of a passage» |96 with thechamber
32.
'
"
'
end of~ the stem of. the valve 88V to move this
valveagainstthespring 90 associated therewith.
The diaphragm |92 has mounted on the other " , The rocker arm<234 also has formed integral 70
face thereof `a sealing gasket, |98 Whichis. adapted _' n therewith vspaced arms 244 having rounded end
to engage a seat rib 200.
The area _within the `portions-which ,extend into an annular wgroove
seat rib 200 ‘is connected> byk Way offa `passage formed on the î’stem 20. On movement of the
202 with the passagev |88, l`and therebyntothe , stem `2|) in .onedirection` the .arms ’244 are en».
75
(i.
4
2,132,915 Y
presses'against _the en'd efV the valve S8 and holds
gagedfby‘a shoulder 246 on the stem 20, and on
this Valve away from its seat against the spring
'90. The spring |85 associated with the valve |84
and the spring 9|]v associated with the valve >88
tionsrcf thev armsv 244 Yare preferably propor- . are proportioned so that the spring |85 is able
to overcome the spring 90 and hold the valve |84
tioned so as.y to2-substantially ñll .the space be
tween the shouldersV 2ê6 and 24S-Aon the stem 20 in the seated position against the opposing force
movement of the stem 20 in the other direction
the rarms 244 are engaged by a shoulder 248
¿ formed on >thefstem 20. The rounded end por
so thatthere will be'substantially nomovement
of the, spring 90.
10'
other.‘
.
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'n
*The end of, the' Shaft -230 whichprojects into
thechamber 486 has secured thereon a rocker
arm >251i which has formed integral therewith an
arm 252 which terminates in a spherical end por
15 tion 254 which is positioned between the'end of
the stem `associated with the valve |84 and the
'
’
.
the valve ‘l0 is in engagement with its seatv or
is positioned adjacent thereto,
'
In initially charging theequipment fluid under l5
pressure is supplied to Vthe brake pipe I, and it
`vflows therefrom by way of the branch pipe~30
and the'passage 28 in the pipe bracket section 'I
' Vstem associated with the valve 220,» as is best
shown in Fig. lof the drawing. f Y
f
In this position of the diaphragm I2 and the
stem 2ûthe poppet valve device 60 is held by the
spring ‘I4 in a position in which the valve ‘I2 is
lout of engagement withV its seat and in which
of thestem 2e and the arms 244 relative to ieach
.
The rocker; arm 25û has a hub portion having to the chamber 26 on the face of the diaphragm
I2 and'in'creases thefpressure of t le fluid in this
Y20 a' boreA therein which is closed’at the inner end
and into which the end of the shaft 230 extends. - chamber.- Fluid under pressure supplied to the
A key 256 is provided and secures the rocker arm ` chamber V26 flows therefrom through the re-`
250 on the shaft 236 so as toV prevent relative rota# stricted port 44 to the chamber 4B in the stem 20.
>On an increase'in the pressure cf ’the fluid in
tive V'movement> therebetween, but to permit
25 movement of . the rocker `armf25|lï axially .of the the chamber 26'suiñcient to overcome the oppos
shaft V230.1» A sealinggasket 258 is Ymounted on ing force cf the spring `|85,Vthe diaphragm I2 is
Ytheshaft'23âV between the rocker arm'250 and the fiexed so as to cause the stem 20 tofmove to
Wall232 and kthe rockerarm' 250 is urged byr the left as Viewed in Fig. 1 of theV drawing, to
,the normal release position,V and on this move
ient of the stem 20 the rocker arm 234 is oper 30
ated'to move theV arm 242 away/from the end of`
the stem of the »valve 8S and permit this valve
to be moved to fthe seated position by the spring
98, while the arm 252 ofthe rocker arm. 258 is
moved against the end rof the stem Vof Ythe valve
|84 and moves this valve away from its seat
meansof afspring 250 to the right, as viewed in
30 Fig.; 2`~of,the'drawing,fso as to compress the gasket
258between the'rocker arm >252|) and the Wall 232and thereby prevent the now of' ñuid between
the chamber |86 andthe bore in which the shaft
23|)Y is mounted. l
~
,
yThe various partsof the emergency'valve de
vice provided by this invention are arranged
and proportioned sok that~when> the diaphragm
against the spring
I2 is inthe normal release positiomwhich is the
position‘in which it is sho-wn in Fig. 1V ci the
40 drawing, the valve' 48, which controls the flow
of fluid 'from the brake pipe I to» the chamber
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Y
'
.
phragm I2 and the stem 2|),the valve device 24
is moved against the poppetvalve device 60 and
tion to cutV 01T communication between the cham
bery 32 and the atmosphere by way ofthe cham
ber' 64 and the port 68.'
‘
’ ’
'
`On a further increase in theV pressure of the
In this position of the diaphragm I2, the valve
|54 is'held away from 'its seat by kthe _arm 252
fluid'in the" chamber '26 the diaphragm I2 flexes
sol as torcause‘the' stem 28 to 'inove to the left,
as_viewed in Fig. 1 vof- the drawing, away from
of the rocker arm 250, thereby establishing 'communication between the chamber |86 and the
the normal release position to aninner release
position againstthe opposing force exerted by
‘ chamber 32;
` chamberV
|18.
'f
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'
40
moves this valve device against the spring 14 so
that fthe valve i2 is' mcved'to the seated posi@
32, is seated, andl so that the poppet valve device
lili,` which controls' the release of fluid underl
pressureV from the chamber 32 to the atmosphere.,
45 is inthe positionin which the valve 'I2 engages
its seat tc- cut off the release of fluid from the
50
|85.
In addition, on this movement of the dia
~~
theysp'r‘ing 5s,
.
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Atfthis time the» end zei rof the arm 252 is out
Onthis movement of Ythe <stem 20 the spring
" of engagement with'the valve 226, beingv spaced f 56 -is Vcompressed somewhat, and this force
therefrom a short distance, asis clearlyshown tra'ns'mitte'dfthrough? the Vvalve Vdevice 24, which
in Fig.. l vof~ thedrawing, and the valve 228 is presses against the valve 'I2 of the pop-pet valve
_ held in the seatedppositio'n by the spring 224. '
deviceV 60, sor as' to- more 'ñrmly pressV the valve
Y In, this position-of the diaphragm |2^therocker Y . 'I2 against its seat. 'i On this lmovement of the
arm 2734*-»is ina position in which the arm 242»
stern 20 the'- seat'carried by _the 'stem 20 moves
thereof is vspaced from the end of- the‘stem ‘of
theY 'valve 88 îa short distancefand'the valve
88, which controls'the supply of fluid under pres-U
sure from thefchamber'ëZto the chamber 82r on
away fromV the -valve 48,'therebywopening com
the face of theV vent 'valve piston 88, is held in
65 the seated position by means of the spring 98.
When the'brake pipe I and the chamber 32 Vare
at atmospheric pressure the diaphragm Yi2 is held
bythe springr‘i85 operating ythrough the valve
|84 »and theiarm 252 of the rocker'arm 250 in a
position ashortdistance to» the right as viewed>
i in Fig. lof theV drawing, fromthe position in
'i which itis shown in the drawing, and the valve
|84 is heldv'in the .seated position. In this .posi
tion of thedi'aphrag'm I2 and the stem 20 the
75
arm 4¿42 A¿of the rocker. arm/234> engages and
munication between Vthe- chamber r40 and the '
chamber 32 through the passages V5B, and iiuid
under pressure supplied to thefchamber 4|] from
the chamber`26' iiowsrtherefrornthrough the pas'
sages5|lrto the chamber 32,'and from the cham
ber 32 «fluid under pressure iiows by '-.vay of the
passage 36 to‘ thequick action'chamber 38. YThe
Y ratefo-f increase‘in the pressure ofthe ñuid in
~ theïchamber 32Í‘a'nd
65
the quick action chamber
38 vis relatively slow, however, because of the re
strictedrate-atV which fluid under pressure may
flow'from the Achamber 26 through the restricted
passage '44.,
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. In'addition, on this movement of the stem 2li> Y
the rockerarm 234listurned/so'as
move the 75.
5
arm 242 away fromthe end' of the stem of the
valve 88, while this movement `of the rocker arm
234~is transmittedthrough the shaft 230 to turn
the rocker arm 250 sorthat .the rspherical-end p_or- ‘
tion 254 on the arm 252 presses against the end
L0.
ofV the `-stem of the valve I84wand moves this
valve against the lspring |85 farther’awayv from
its seat. By this movement of the -rocker'arm
250`th`e spherical end portion 254'is'moved far
ther away from the valve 220.
- ` A ‘
`ï
On an increase in the pressure of the `iiuid in
the chamber 32 ñuid under pressure flows there
ber 32' and increasing the pressure of the fluid
in the emergency reservoir 4.v
When the pressure of the iiuid in _the'chamber
32 has been reducedïsubstantially tothe pres
sure ¿of the` ñuid in the emergency reservoir 4,
the spill-overcheck >valve |26 is moved into en
gagement with Athe seat rib '|30' by the spring
|28,_thereby._ cutting off the iiow of fluid from
the» chamber 32 to the emergency reservoir 4 and,
Y. 'preventing back'ño'w of'fluid `>from the emer
vgencvzyA reservoirV 4 to the chamber A32'.
,
10V
i
" lIn `addition,‘on the supply of fluid vunder pres
fromfthrough the'ports 34» in the guide member sure, to Vthetbralre pipe in ,initially charging the ,
22 to the area'on' the face of the diaphragm I2.` ¿ equipment,vthe service portion-ofthe brake con
Fluid'under pressure 'suppliedft'o the chamber? trolling‘valve device ,5 operates as described in
32 ‘also flows therefrom through> the ports'l54 Vto rdetail in the above identified patent to open a
the chamber 52 within the stem 29, aridi-‘from communication through which ñuid under pres
thisY chamber itfiows through' the> >ports 66 'to
sureïmayîbe supplied 'from the‘brake pipey I to
the chamber 62 on the face of the valve device
the auxiliary» reservoir 3 and thev emergency res
20 24. As the valve 'I2 of the poppet valve _device 60
is in the seated position at» this timefthe re
lease of fluid under pressure from the chamber
32 is cut off; Fluid under pressure supplied to
the chamber B2 ñows therefrom by `way of the
25 passage |96 to the chamber |94 Von the face of.V
the diaphragm |92 of the timing valve vdevice |90
and exerts a force on thisdiaphragm vto hold the
sealing gasketl |98 in engagementwith >the seat
rib200.
‘
1
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Y
'
ervoir 4.
l"
'
j
20
Ona reduction- in the pressure of the fluid in
the' brake pipe ata service rate to effect a serv
iceapplicationî of the brakes there will be a grad
' ual reduction in the pressure, of the fluid in the
chamberkZIi -on the face of 'the diaphragm I2.
« - There will 'bea corresponding reduction in the
force‘exerted :on the diaphragm |2’by the i» iiuid
under pressure
the chamber'26 and the fluid
under pressure 'in thechamber' 32 on the oppo
After ¿a time interval the pressure of the fluid 'site _side >of the: diaphragm I2, assisted by the 30
in the chamber 32 will increase' substantially to springs 'I4> and |85, will exert a greater force on
th'e‘pressur'e oi"> the fluid .in the chamber 26 on this 'diaphragm than is exerted by the fluid under
the oppositeY face of the diaphragm I2, andy when> . pressure in the'chamber 26. ÍAs a result the dia
the pressure of the fluid in 'the chamber 32 Vap „phragm I2` will be moved to theright, as viewed "
35 proaches the pressure of the fluid in the chamber
in Fig. 1» of the drawing, thereby moving the stem 35
26 the stem 20 and the diaphragm I2 will be
VOn this ^movement of the stem 20 the seat on
moved to the right, as <viewed in
1 of ,the
281:0
thelright‘.`
`
’
n
'l
Y
drawing, away from the >inner release position ¿the stem 20 will prem against the valve 48 of the
40
by the spring 56, assisted bythe spring |85'. ..
When the pressure of the'iluid in the'chamber
32 has increased substantially to theI same pres
valve device 24 and will move the valve device 24
tothe right as viewed in Fig. 1 of the drawing,
thereby'permitting the valve 'I2 of the poppet
sure as is present in the chamber 26 the spring valve device 60 to be moved away from its seat ,
i
,
,
,
,
56 >will have expanded suiiiciently to move the` by :the spring' 14. >
On- this movement of the stem 20 the 'arm 252
stem 2U to the right so that the seat*- carried
45 thereby will engage the'valve 48 to cut ofl’V zoom
.of-therocker' arm 250 is vmoved in a 'counter
municationl between the chamber 46 and the clockwise.` direction, asviewed in Fig. 1 rof the
50
chamber 32 through the passages ‘50, thereby cut
drawing‘thereby permitting the valvev |84 to be `
ting ofi’ theV Ysupply of ñuid under pressure to the
moved towards itsseat `by the spring |85 asso
chamber 32 >from thev chamber 40 and .chamber
26, and cutting off the further increase in the
pressure of the ñuid‘in the chamber 32.
On the return of the stem 29 from the inner
ciated
therewith.
"
.
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,
1
"
Y
‘ On movement of the’valve 12 of the poppet
valve device¿80 away from its seat, fluid under
pressure'will flow ’from the chamber 32 through
release position to thek normal release positionÍ the passages 54 to the chamber 52 Within the stem
the valve I84’wi1l be moved by the spring |85y «_ 20,»and therefrom» through the passages 66 to the
55 towards its seat substantially to the position in
chamber 62 on the face of the valve device 24, 55
which itis shown in Fig. 1 of the drawing, in and thence pastf'the unseated valveA ‘I2 to the
which position it is out of engagement with its ~ chamber 64 from which it-may flow to the atmos
seat so as topermit communication between the phere through the restricted passage 68.
The restricted'fpassage'GB is proportioned so
chamber |86 and the chamber |18. Y
~
60
In addition, on this movement ofthe stem‘ZI) that the rate ~of=ñow of fluid through this pas
sage is such that it permits the pressure of the
the rockerrarm 234 will-be turned so as to- move
the arm 242 towards the valve 88,V while the end ` fluid in the valve chamber 32 and the quick action
254 of the arm 252 ofthe rocker-arm 25I|~wi1l be ‘
moved towards the valve 220.
1
Y
`Í
i
chamber'38to be reduced substantially as rapidly
as rthe pressurefofthe fluid in the brake pipe ‘|
If for'any reason the pressure of the fluid in and in thechamber 26 isv reduced during a re 65
the chamber 32 increases more rapidly than the l duction inbrake pipe pressure ata servicerate. >
' pressure ofthe ñuid in the.emergency-reservoir,- Y .
After afeertainV amount' of‘movementfof the
v4 fluid lunder pressure from thejchamber 32 Will~ » diaphragm |2 to the- right, as viewed in Fig. 1 of
flowY past the ball check valve |34> to the »cham
the drawing, the rocker arm 234 is turned in a
ber |32, and will move the spill-over check valve vcounterclockwise direction-an amount suiiicient
|26 away from the seat rib |30 against-the spring kto cause 'the arm`2'42V vto >engage the end of the
|28. This ñuid will then flow to thechamberV stem of the valve 88 _so that'further movement
|24 and therefrom by way of »the passage and of the rockerv arm 234 and the stem 28 is resisted
Y ‘ Vpipe I 36 to the emergency reservoir 4,*_thereby
75
reducing the pressureof the fiuid'in the Scham
>bythe spring-98 operating through the poppet
valve' 88.
~ -
`
75
2,132,915
6
" , The valve 18 of the poppet valve, device 60 is
arranged so that on movement of the armv 242
of the rockerlarm 234 into engagement with the
end of the stem'of'the valve 88'it will be located
adjacent to, but' out of engagement with its seat
so as to permit fluid under'pressure to continue
. to flow from the chamber 32 tothe chamberk64
and thence to the atmosphere.
l If for any reason, the rate at which the pres-Y
vsure of‘ the fluid in the brake pipeY I is reduced
momentarily exceeds the normalA service `rate of
reduction in brake pipe pressure so that the
pressure of the ñuid‘ in the chamber 28 is re
~ 'duced more. rapidly than the pressure of the
fluid in the chambers 32` and 38 is reduced- by
operationof the poppet valve device .60, the force
exerted onthe diaphragm I2 by the fluid under '
pressure in the rchamber V32 will' exceed theforce
of the arm 252 of the rocker armr250, to the
chamber |18 from which" it flows by way ,of the
passage |14 tothe chamber |12 on the spring
side of the inshot valve piston |58, and through
the -groove |82 to theV area outwardly of the seat
ribl |62 on the Vopposite face of the inshot valve
piston
|58'.
Y
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Y
.
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f
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The pressures in the chambers onthe oppo
siteV sides of the inshotv valverpiston |58 will,
therefore, be substantially equal and the inshot 10
valve piston |58 will thus be held in engagement
with the seat ribl |62 yby thenspring |80, and will
hold the valve |42 away from the'seat rib |46
so as to permit fluid kunder pressure to ilow at
a rapid rate from the passage'l56 and the'cham 15
ber |44through’the passage |52 to the brake
cylinder.
AThe service portion of Vthe
`
,brake
’
controlling
"
valve device willoperate in the manner described
in detailV in the above identified patent to supply
Ther ’fluid under pressure in the chamber'32,Y fluid under pressure to the 'brake cylinder 2 until
therefore, will tend to move the diaphragm I2 to the pressure of the fluid in the auxiliary reservoir
Vthe right, as viewed in Fig. 1 of the drawing, so Sis reduced substantially to the pressure to which
as to- permit the puppet ’valve device 60 to?be the fluid in the brake pipe has been reduced. `
Fluid unde-r pressure supplied from the cham V25
moved by the springv 14 to the positionin which
the valve’10 engages its seat to cut off the release ber |18 to the passage |14 also kilows tothe in
of fluid under pressure from,Y the ychamber 32. shot Vpiston volume |16A and therefrom by Way
exerted on this diaphragm by the fluid' under
pressure in the chamber 26.
"
’
However, this movement of the diaphragm I2 and
the stem20, which is rigidly secured thereto, is
30 opposed'bythe spring 90 operating through the
Y p‘oppet valve 88V and the arm’242 of the rocker
arm `234. The arm 242 engages the end of the
of the passage 208, to the‘accelerated release
check valves 2I8 and 2I0., The accelerated re
lease check valve 2 I0 is heldin engagement with 30
the seat rib 2|4 by the springy 2|2 and byA the _
pressure of the fluid inthe chamber |20, which
stem of the *valve 88 before the valve 10 of the is connected to the brake pipe |¿by way of the
poppet .valve device60 is moved to the seated passage |22, the passage 28 and the branchipipe
30.-' During normal service applications of the 35
35 position, and the spring 90' will prevent ,move
ment of the diaphragm I2 to a position 'to »per-v brakes the pressure of the ñuid in the brakev pipe
mit'the valve 10 of the poppet valve device 60' to I willexceed the pressure of the fluid in the brake
be moved to the seated position'by the vspring cylinderl 2, and hence the fluid under pressure
supplied to the passage 208 will be unable to move
14 to cut offl the release of fluid from the cham
the accelerated release check valve 2|0 away 40
ber
32
until
a'substantial
Vdifferential
is
created
40
Vbetween the pressures in the chamber 26 andthe 'from the seat rib»2|4 against the- opposing forces
of the fluid under pressure in the chamber |20
chamber 32.
.
v_
~
The diaphragm. I2, therefore, will not'fmove'to
the position to'permit vthe poppet valve device
45 60 to cut off the release of ñuid under pressure
from ,the chamber 32 vin response to a momen
and the spring 2 I2.
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~
~ `Fluid. under pressure supplied by the service
portion Vof. -the valvedevice to the passage |56 45
and the passage |88 also flows byy Wayv of the‘pas
tary reduction in the pressure of ,the fluid in the
sage 202 to thefarea on the face of the diaphragm
brake pipe ata rate exceeding the service rate. Y
|92 'of the timing valve device I9 within the seat
rib 208,'„while the fluid under'pressure supplied
tothe passage |69 from the inshot valve device 50
On a reduction in the pressure of the -?luid- in
the
brake pipe at a service rate,.the service por
50
tion (not shown) of the brake controlling valve
device 5 operates in» a manner described> in de#
tail in the above identified patent> to cut off the
|40 flows through the chokeVv 204 to» the area on
the face of the diaphragm |92 outwardly of the
~seatrib
208.
,
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Y
communication through which fluid is, supplied . . ' ‘The diaphragm" |92 «Will beheld by’V lGhe fluid
55
60
from the brake pipev to the 'auxiliary reservoir,
underpressure inv the chamber |94 in a position 55
and to supply fluid under pressure from the aux
in` which the sealin-g gasket | 98y engages the seat
rib 200', however, Yso that ordinarily during serv
iliary' reservoir 3 to the, passagep|56i leading to
the chamber |44 of the inshot valve device |40.
Fluid underpressuresupplied to the chamber
Y|4¢1 flows therefrom' past thejseat> rib |46 and
through the passagel|52 tothe .chamber |50,
ice applications Aof the brakes there will'be no
communication between the areas’on the opposite
sides o-f the seat rib 200.
' ,
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Y' Y
60
'
If after the pressure of the fluid in the brake
' from whichrit flows tol the chamber |64 within
pipe I has been reduced ‘to the desired extent,
the seat rib |62 kon the faceiofvthe. inshot valve
thel engineer’s brake valve is turned tothe lap
Y . piston |58,„_and‘by way of the passage and pipe
position to cut olf the Vfurther venting’of fluid
65 |69 to the brake cylinder'2, kso* that the brake> from the brake pipe and to maintainV the pres
cylinder is supplied with> fluid under pressure to sure of the fluid in this pipe, the emergency Valve
elfect a Vservice application of the brakes.y
device provided by this invention vwill operate as
Fluid under Vpressure Vsupplied bythe service ' described in detail above to'release ñuidxunder
portion of the valve device 5 to ther passage |56 pressure from the chamber 32 and the quick ac--
65
also.` >ñows therefrom throughl the passage |88 to y tion Achamber 38 until the `pressure of the fluidin 70
these chambersV is reduced substantially to the
the chamberv |86. ' Fluid under pressure supplied `
to the chamber |86 flows therefrom through the
pressure in the chamber 26.
.
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lWhen the pressure of theV iluid inthe cham
is, located and pastthe valve |84, which at this` -ber'32 and the chamber 38 hasr been reduced to
u passage in which the‘flutedfstem-of the valve |84V
75 time isheld away from itsV seat by the endv 254
the pressure of `theñuìd in the chamber 26, or 75
awaeisv
l
7
slightly below the pressure in the chambery 26, the
diaphragm l2 is returned to the normal release
ment ïwith the valve >48 the spring-56 is no longer
position, and the stem 20 is moved so as tomove
the poppet valve device 6U so that the’fvalve 12
thereof lengages its seat t0 cut off the release o
the drawing.
fluid‘from the chamber. 32.
»
.
>
On a subsequent increase in the pressure of the`
fluid in thev brake pipe I.V to effect the release of
eifectiveto urge thediaphragm |2 and the stem
20 to move to the rightfas viewed in Fig. 1 of
,
On this movement of the stem 20, the rocker
` arm 234'is moved in a counterclockwise direc
tion, as viewed in Fig. 1 of the drawing, while
the arm 252 of the rocker arm'250 is also moved.
the brakes, the service portion of the brake'con-` in a counterclockwise direction, thereby permit
trolling valve device 5 operates in the manner ting >the spring |85 to move the poppet valve IG
described in detail in the above identified patent |84 towards its seat, but the amount of move
to release fluid under pressure from the brake rment permitted the valve | 84 is insufficient to
cylinder 2, and to open a communication through permit the valve |84 to be moved to the seated
which fluid under pressure :will be supplied from
15 the brake pipe | to the auxiliary reservoir 3._`
On an increase in the pressure of the fluid in
On this increase in the pressure of the fluid in the chamber 32 fluid will flow therefrom through
the brake pipe I, there4 will be a corresponding theV passages 54 tothe chamber 52 Within the
increase in the' pressure of the fluid ir! the stemd 28', and therefrom through the passages 66
chamber 26 on theface of the diaphragm I2.
through the valve device 24 to the chamber 62,
By this increase in the pressure. of the fluid from which it will flow by way of the passage
in the chamber k26, the force exerted fby the` |96 to the chamber |94 on the face of the dia
fluid under pressure in this chamber
be in
phragm |92 of the timing valve device |90 to
creased above the opposing force of -the springs ` increase the pressure of the fluid in this cham
14 and |85 together with the ñuid undervpres-Y , ber tothe pressure presentin the chamber 32.
25 sure yin the chamber l32 acting on the opposite
On Vthe release of fluid underA pressure from
face of the diaphragm, Yandïthe diaphragmv l2 the passage |56and the brake cylinder 2 fluid 25
and the stem 20 will bemoved `to the left, as under pressure in the chamber |12 on the spring
,viewed in Fig. l of the drawing,ß~to‘the_ innerV side of the inshot valve piston |58 will flow to
release position, while the -valve devicev 24 will the passage |56 by way of they passage |14, theV
30 be moved so as to move the valve 12 of the poppet chamber |18, through the passage‘controlled by
301
valve device 60 to the seated positionto cut off the poppet valve |84 to the chamber |86, and
the release of ñuid under vpressure from. the then byr way 4of the passage |88 to the passage
position.
chamber 32, if the valve 12 is not already in this
position.
‘
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|56 leading» to the service portion of the brakev V
controlling valve device'.`>
~
p
On further movement of theL stem 26 subse-VV L On a reduction in the pressure of the fluid in 33
' quent to engagement of the >valve 12 with its seat, the brake pipe | at an emergency rate, the serv
the spring 56 will be'compressed and the seat ` ice portion of the brake controlling valve de_vlce
on the stem 20 will be movediaway from' the
5 operates in the manner described in detail in
valve 48, thereby opening communication be» >the above identified patent to supply fluid un-v
tween .the chamber 40 andthe chamber k32A der pressure from the auxiliary reservoir 3 to the
4o
through the passages 58, and fluid under pres passage |56 leadingto the brake cylinder 2, »
sure supplied from the brake pipe I to the cham- ,
In addition, on a reduction in the pressureV of
ber 26 may flow therefrom at a restricted `rate the fluid in the brake pipe at an emergency rate
through the restricted passage k44 to the chamber
there will be a rapid reduction in the pressure
46, and then to the chamber 32'to Vincrease‘the . of the fluid‘in the chamber 26 on the face of the
pressure of the fluid in thischamber-and in the
quick action chamber 38.
’
'
On this’movement of thefstem~2|| theV rocker`
50
"diaphragm . I2.
`
On» this rapid reduction in the pressure of the
fluid in the chamber 26 the fluid under pres
arm 234 is moved in >a clockwise direction, as
sure inV the chamber 32 on the opposite face of
viewed in Fig. 1 of the- drawing, while the end
the diaphragm |2 assisted by the springs 14 and
|85 will cause the diaphragm |2 to moveto the
right, as viewed in Fig. 1 of the drawing, there#
by moving the stem 20 to the right.Y At this time
the seat on the stem 20 is engaged by the valve
48l associated with the valve device 24, and on
this movement ofthe stem 20 the valve device r24
254 of the arm 252 of the rocker armV 250 presses
- against the end of the stem of the poppetvalve
|84 and moves it farther away from `its seat
against the spring |85 associated therewith. `
After a time interval the pressure ,of the fluid
in the chamber 32, and in the quick action cham
ber 38, will be increased by the f'low‘of fluid ~ is movedV so as to permit the valve 12 of the
thereto from the chamber 26 rth-roughrthe re
stricted passage 44 andthe passages 56 to sub
poppet valve device 60 to be moved away from
its seat by the spring 14 and thereby release
stantially the pressure of the fluid in the cham?Y fluid underpressure from the chamber 32 byber 26 on the opposite face of the diaphragm . way of the chamber 64 and therestricted port 68
l2.
The rate of flow of fluid from the chamber
When the pressure of the fluid'in the chamber ~ 32` through` the restricted port 68v is such, how
. 32 has increased substantially to this value, theï ever, that the pressure of thefluid in the cham#
stem 20 and the diaphragmïf|2 `will be moved ber v»32 and the quickaction chamber 38 cannot
from the inner release position'V bythe spring 56
assisted by the springs 14 and |85 ìtoa position,
be reduced asy rapidly as the pressure of the fluid
, inthe chamber’ 26 is reduced on a reduction in
in which the seat on the/stem 20 engages thev thepressure of the fluid in the brake pipeat an
valve 48 so` as to out off the vflow of fluid from emergency rate.f
_
the chamber 48 to the chamberv 32, thereby cut- f
As a result,V therefore, the differential of pres
tingv off the increase in >the pressure 'of the fluid ,sures between the pressure of the fluid yin they
in the chamber 32 and in the quick action cham Vchamber 32 and in the chamber 26 on opposite
sides of thediaphragm |2 will increase, and the
When the spring 56 has expanded farY enough force exerted by the fluid under pressure in the
t0 move the seat on the stem 20rinto 'engage
chamber 32 on the diaphragm |2, together ïwith
ber
38.
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_,
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Y
8
area-,915
the foree exerted by thefsprings «14 and |85, wiil
exceed lthe forcîeexerted bythe 'fluid under presià
sure in the chamber'ZB by an amount suîûcient to
overcome the force exerted Y by the- spring 9|)
through the valve 88 rand' opposing Ynfiovernent of
to the chamber 82'fsubstantially'exoeeds rthe rèate y
at which fluid under pressure may ‘new frcmfthe
chamber 82 through the re'jstrictedrpassage 96
through the piston Y3l), and ¿through the groove
'9,4 aro-und the piston, and as a result there will
the stem`2'll and *.thediaphrag'rm I2~by?the ñuid ' be a rapid increase in the pressure of the nuid
.
under pressure in -the ¿chamber-7,32.
` .
in the chamber 82. "
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.
Á '
Y
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The‘valve 82 will, therefore, bemoved by the
arm 242 of theYV rocker arm 234against the-spring
Qn this increase in the pressure of the
in
the:V chamber y82 the force exerted by the fluid
10', Qßfawiay fronr its seat and fluid‘under pressure
under pressurein this chamber exceeds the op
posing force of the'spring H4 and'j'of the fluid
under pressure in the chamber |63 operating
through the valve |06 and;Y opposing movement
may'thereuponflow from the chamber 32 to t'ne
chamber 86, and thence by way of the ypassage
-34 tothe chamber `82 on the face of the vent
Valverpiston 8|).
15
?
i
i
"The poppet Valve device ûii’an'd the Vother por
tions of the emergencfîfy valvegdevice provided by
this invention are arranged ’and proportioned so
that the‘valve'lß of the poppet valve device `till will
not be movediinto engagement with its seat until
20. after a limited amount of movement of the stem
25 beyond theV point at which .the arm 242 of the
rocker arm'2`î34 engages the end of the stem of
the valve 88.Y The poppet valvedevice B0, there
fore, will not be operated
cut off the release
chamber 32 until
25 of fluid under'pressure from
the >valve ’88 is openedv to supplyv fluid under pres
sure to- thelehamberï'BZ on the face' of theventì
of the vent valve piston 8i). i
10
i
As a result'of this increase in the pressure of
the'fluid in the chamber B2'the vent valve piston
30 willbe moved tothe right, as viewed in_iî‘ig. 1
15
off'the drawing, so that the face thereof engages
rib Hill!V on the gasket 98 to cut oiï ther flow
of nuid around> the periphery of V4the piston to 20
the passage 92 leading to the atmosphere.
, On this movement of the vent valve piston S9
the vent' valve Ille` is moved'against the spring
i M so that the sealing gasket H9 is moved away
from"the¿seat ‘ribïl |2,' thereby permitting iiuid 275
under pressure in >the chamber |08 to escape toV
the atmosphere past the seat rib l l 2 and through
valve pistonîßû, but it'will loe operated to cut on"
the passage 92.’
the release of fluid under pressure from the cham
ber l"32`immediately after the valve 88 is opened.
On further movement of the' stem 2|! ,toÍthef
right, as viewed in» Fig.l l of the drawing, after
“Fluid under pressure vis supplied to the chamber
|98 vfrom the brake pipe | through the branch 30'
pipe'êß, the passages 28 and l 22 in Ythe pipe brack
engagement of the' valve 'Iûjf of the poppet valve
device 6l) with its seat the valve device 24 moves
35 away from thevalve 'I2V of the poppet valve device
60, so that the spring 14 does not exert any force
on'the stern 20.
Y
~
*The variöus parts of '-the emergency valve de
vice> provided by this invention are also arranged
l
'
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'
et ¿section l, the chamber |20 and the passage
li
,
Y
't
i
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'
f
'
On movement ef the vent valve |06 away from
the seat rib | I2, therefore, fluid under pressure is
vented from the brake pipe l. at a rapid rate
and therel'will be'a‘rapid reduction inthe pres
sure of 'fluid in the brake pipe l, and alse in the
chamber 25 on the face of the diaphragm I2.V
and proportioned so thatthe poppet valve |34
" As a result of VtheV rapid reduction in the pres
is held out of engagement with its seat until after
the arm 242 of the rockerarm 23ê engages the
end of the stem of ther-valige VSil. 'I‘he valve |84
sure of' the'flui’d inthe chamber V2li there will be
a corresponding*decreaseY in the force exerted by
this'fiuid ïonthe diaphragm I2 in opposition to
40
is >moved tov the >seated pesiïtion bythe spring ‘~ the force exerted on this' diaphragm by the fluid
|85 upona limitedYY amount of movement of the under pressure inV the’chamber 32. AThere will, V45
stem 26 beyond theîpo-int at which the arm‘242 of f therefore, be a rapid increase in the force exerted
therockerf arm 234 engages theendVV of the stem on ,the diaphragm l2 and tending to move it to
ofthe valve'88 so that the valve |84 permits fluid rthe'righ’a'as viewed'in Fig. 1 of the drawing, and
under pressure supplied to the brake cylinder 2 it will inove in this direction Vvery rapidly. TheV
50
toi'fiovv to the chamber |12 on the~springsïide of
the inshot valve pistony |58 until'the diaphragm
I2 and the stem 20 have moved beyond the zone
in which their movement-„is not opposed by the
spring 9U associated with the valve 88.
diaphragm ‘l2 may continue 'to nfove in this direc
tion until its‘movement'ï'is limited by engagement
ofthe member 42 with the pipe brackety sec->
tion'l.-
__
‘v
*y
On this movementsof the >diaphragm' l2 the
This insures 'that fluid under pressure will be Y stern 22 is moved so as to move the rocker arm
Fig.
234 inra
1 of counterclockwisedirection,
the drawing,sthereby pressingY2
as viewed
the arm
supplied ¿to the spring side of the inshot Valve
'piston |58 Yduring service applications of the
brakesfso as to prevent operation- of inshotvalve
mechanism to limit the rate of flow of íîiuid to
242 against the end of the stem of the'valve 8B
and moving this Valve farther away from its seat
against the spring 90. "1
Y
60
't
"
60 the brake cylinder.l
In addition, on this movement of the stem 26,
This arrangement alse insures that the'valve '
|84 will be moved to the seated Y¿position Yto cut the end 254 offthe arm 252 of the rocker arm 25|)
off the supply of iiuid under pressure to the spring will be movedä in a counter-clockwise direction,
side of the inshcï*J valve piston’läál cn’movement’ .as viewed in Fig. l of the drawing,V and it will
ofthe diaphragm l2 and the stem 2% to aposition engage the valve 220 and move this valve away 65
toV effectfan emergency application ofthe brakes'Y
from its seat against the spring 224.,
`
ì
Y
_Thervarious parts of theemergencyfvalve de
so“ that theinshot valve mechanisnrvvill pperata-f
as v»Will *hereafter* morevcfully appear, to limit the Y* vice pro-vidediby this/invention are arranged and'
70 e' On lmovement _of the valve Ví88 against :the
` proportioned so that the> end `'254 of the amir252
of the rocker' arm 25€.i will not >engage the valve 70
chamber 82 on Y,the face of the vent valve piston
V75 8B. The rate of supply of fluid under pressure
as toïsupply fluid underl pressure from the chagri-Y
ber 32 to the chamber `_82 on the face Vef thervent 75
rate of now of fluid to the brake cylinder.
springv 8|] away "from its seat, fluid under p_res-v " 220 until after »the arm 24'2fof-the rocker arm
sure flows from the'cha'mber 3_2 to the chamber 234, has engaged the‘endrof the stem of the valve
86 and thence by Way 'ofV the passage âli to the 88 and moved this valve away from its seat? so
9
2,132,915>
sage is such that the vent valve |06 will be held
away from the seat rib || 2 against spring ||4
for a period of time long enough to permit the
pressureof the lluid in the brake pipe | to be
reduced substantially to atmospheric pressure.
C21
When the vpressure of the fluid in the cham
ber 82 on the face of the vent valve piston 80,
and in the chamber 32 and the quick action
chamber 30, has been reduced to a predetermined
relatively low value, the spring ||4¢will move 10
the vent valve |06 to theleft, as viewed in Fig. 1
in ythe drawing, so that'the sealing gasket || 0
again engages the seat rib | | 2 to cut off communi
'cation between the chamber |08 `and the at
valve piston 80. The valve- 220 and the> spring
224, therefore, will not oppose movement ofthe
diaphragm l2 and the stem ,20' to the position to
open the valve 88 to supply fluid under pressure
to the Vent valve piston.
'
`
l
-
v
On movement of the valve 220 away Vfrom its
seat ñuid under pressure fromythe emergency
l reservoir 4 supplied by way of the pipe; and pas
sage |36 to the chamber> 222 will flow past the
valve 220 to the chamber> |86, from which it
flows by way of the passage |88 to the passage
|56 leading into the chamber |44 of the inshot
=va1ve device |40.
»
'
In addition, the fluid under pressure supplied
to the chamber |86, will flow therefrom by way
of the passage 202 to the arearwithinthe seat
rib 200 on the face of the sealing `gasket |98 of
the timing valve device |90.> On the initial sup
mosphere passage 92.
,
On this movement of the vent valve |06 the
piston 80 is moved away from therib |00 on the
gasket 98 and is returned to the position in
ply of fluid under-pressure to the areawithin the ' which the groove 94 establishes communication
seat rib 200 the sealingV gasket |98§will be held around the piston 80 so that any fluid under 20
pressureremaining in the chamber 82 may escape
in engagement with the seat rib >200 as'the pres
therefrom at a rapid rate through the groove
sure of the fluid in the chamber |94 on the oppo
94 to the chamber on the opposite face of the
site face of the diaphragm |92 will be at a rela
tively high value and will exert a relativelygreat piston and thence to the atmosphere by way of
25. amount of force tending to hold the sealing gas- ` Athe passage 92.
» As the kpressure of the fluid in the. chamber 32
ket in engagement with the seat rib 200.
On the supply of ñuidiunder pressure from the is reduced there will be a corresponding reduc
tion in the pressure of the fluid in the chamber
auxiliary reservoir 3 and the emergency reser
voir 4to the chamber |44 of the inshot valve |94 on the face ofv the diaphragm |92 of- the
device |40 fluid will flow past the unseated valve timing valve device |90, and a corresponding re 30.
| 42 to the'passage |52 and tothe chamber |50. duction in the force exerted by this fluid under
Fluid under pressure supplied to the chamber pressure on the diaphragm |92 and tending to
| 50 will flow therefrom to the chamber |64 on maintain the sealing gasket |98 in engagement
the face of the piston y|58 and by way. of the with the seat rib 200.
' At the same time,V as a result of the gradual 35
353 passage and pipe |69 to the brakecylinder 2.
When the pressure'of the ñuid‘ in the brake increase in the pressure of the fluid in the brake
cylinder Z’has increased to a predetermined value cylinder 2, there will be a gradual increase in the
the force exerted by the fluid under pressure in pressure of the fluid in the chambers on the
the chamber |64 on the piston |58, together with opposite face of the diaphragm |92 'and the
the force exerted by the spring |48 acting through i force exerted by the constantly increasing pres 40'
the valve |42, will be sufiicient toovercome the sure -in these chamberswill eventually overcome
opposing force of the spring |80, and .the piston the opposing force of the fluid in the chamber
|58 will be moved to the left, as viewedin Fig. 1 |94 which is constantly decreasing in pressure.
When this occurs the diaphragm |92 will be
of the drawing, vagainst the spring |80, so that
moved so as to move the sealing gasket |98 away
45 the seat ribv |66 on the piston |58 engages the from theY seat rib 200 so that thereafter fluid 45
sealing gasket |68 to prevent the flow of fluid
from the chamber |64 to the chamber |12 ron under pressure supplied to the passage |56 from
the auxiliary reservoir 3, and from the emer
' the spring side of the piston |58.
On this movement of the’piston' |58 Athe Vstem gency reservoir 4 to the chamber |86 and thence
to the'passage 202, can llow past the seat rib „x
50' |10 is moved to a position toA permit v.the valve 200, and through the choke or restricted pas- “
|42 to be movedr by the spring >|48 .into the en
gagement with the seat ribV |46, thereby'cuttlng sage 204 to the passage |69 leading to the brake
off the flow of lluid from the chamber |44 cylinder. This will result in an increased rate
through the passage |52 to the chamber |50 of ñow of fluid‘to the brake cylinder, and fluid
under pressure will continue to flow to the brake
55 and thenceto the brake cylinder.
On movement of the valve |42 to theseated cylinder from the auxiliary reservoir 3 and the
position fluid under pressure continues to flow emergency reservoir 4 until the pressures in> these
reservoirs and in the brake cylinder equalize.
from the chamber |44athrough the lrestricted
passage |54 to the chamber |50 at a- restricted
60 rate. The pressure of the fluid in the brake icyl-'
inder 2 will thereafter be increased at a slower
rate than occurred on the'initial supply of fluid
under pressure to the brake cylinder.
lThe fluid under pressure whichis supplied toy
the chamber B2 on the face of the> vent valve
piston 80 escapes therefrom through the restrict
When the pressure of the fluid in the cham
ber 32 has been reduced to a very low value by 60
the venting of fluid under pressure therefrom
through the restricted passage 96 through the
vent valve piston 80 or through the groove 94
around the vent valve piston 80, the force ex
erted by the fluid under pressure in the cham 65
ber 32 on the diaphragm I2 is insulñcient to hold
the diaphragm against the opposing force of
ed passage 96 to the passage 92 which communi
cates with the atmosphere. As a'result of the` the‘spring 90 acting through the valve 88 and
gradual release ofY fluid under pressure through the arm 242 of the rocker arm 234, and the
70A the passage 96 there will be agradual reduction Íspring 224 acting through the valve 220 and 70
` in the pressure of the fluid'inv the chamber 32,
in the quick action chamber 38 and in the cham
ber 82.
»
v
the arm 252 of the rocker arm 250.. 'As a re
sult the springs 90 and 224 will move the valves
88 " and 220, respectively, towards their seats,
The passage 96 is proportioned,v however, soY thereby causing the diaphragm |2 to be moved
75.' that the rate of flow'oflluid through this pas Y a short distance’to therleft from the applica 75
10
2,132,915V
tion> position towards-the normal _release posi
tion.
'
«
"
'
"
On-movement of the valvev 220 to the seated
position the spring 224 is no longer effective to
exert any force on' the> arm 252 ori the rocker
arm 254, and thereafter> the stem 20 is subject
only to the force exerted by the spring 951 oper
ating through the poppet valve 88 and the arm
242 of the rocker arm 234,
10 y'On' movement of the stem 28 and the dia
phragm |2 away from emergency application po
sition subsequent to engagement of the valve
' V220 with its seat, the end 254 of the arm 252 of
the rocker arm 250 engages the end of the stem
15 of the valve |84 which is held in the seated po
the stem 20 the rocker arm 234 is moved in a
clockwise direction so that the'varm' 242 of the
rocker arm 234 moves away from the end of the
stem of the valve 88 and permits this valve to be
moved to the seated position by the spring 90.
` ~The'nriovement' ofthe stem 20 is transmitted
through ‘theïspring 58 to the valve device 24
which presses'against the Vvalve 72 of the poppet
valve' device 60 and moves this Valve device
against the Yspring 74 vso the valve 72 is moved 10’
Yinte engagement with its seat to cut oif Ycom
munication between the chamber 32 and the at'
mosphere by way of the chamber 64l and the
passage 68.
.
'
After the stem 28 has moved far enough from
sition by' thespring |85 so that further move
the' application position towards the‘normal or
ment of the stem 20'and the diaphragm |2 by release position to move the valve 72 of the
the spring 90 operating through the valve 88 is poppet 'valve device 60 into engagement’ with its
opposed bythe spring |85 operating through . seat further movement of the valve device 24
20 the valve |84.`
"
l
'_
Y
isY prevented, whilemovement of the stem 28 20
The springs |85 and> 90 are proportioned so relative to the valve device 24 is opposed by thethat the spring 90 is unable to overcome the spring 56.
c
spring |85, and as a result the valve |84 is held
On movement of the valve |84 away from its
in the seated position by the spring |85, while seat the fluid under pressure present in the
V25 the valve 88 is held away from its seat byi the
chamber |86, which communicates with the brake
arm~242 of theY rocker arm 234.
, Y
cylinder 2 throughy the timing valve device |90
As the valve> 88 is held in the operi position and the inshot valve device |40, will ñow there
any ñuid under pressure remaining Ain the cham
from' to the chamber |78 and thence by way of
ber r32 may escape to the atmosphere through the passage |74 to the inshot piston volume |78.
30 the chamber 86, the passage 84 and the chamber Fluid under' pressure supplied to the inshot pis 30'
82 which is open to the atmosphere through the ton volume |76 will iiow therefrom through the
groove 94.
’
u
f
passage 208 and past the ball check valve~2l8
As the valve |84 is held in the‘seated-positionY to the chamber 2|6 .within the seat rib 2|4, and
bythe spring |85, fluid under pressure in the ona'nv increase in the pressure of the iiuid in the
35 chamber |86, which communicates ’with the
brake cylinder v2 byway of the passages |88 and
|56'and the inshot'valve device |48, cannot flow
to the chamber |78 from which it could flow by
way of YAthe passage'l74 and the inshot piston
40 volume |78l to the passage 208 and past the ac
celerated release check valves 2i8 and 2 i ß Yto the
brake pipe |.
'u
pipe 30 leading to the brake pipe |.
On a subsequent increase in the pressure of
the ñuid in the brake pipe | to Yeffect the release
45
yof the brakes, there will bea correspondingV in
crease in the pressure of the iiuid in the cham
ber 26 on the face of the diaphragm I2.r VOn an
increase in the pressure of the fluid in the cham
ber 26, fluid under pressure williiow therefrom
50
chamber 2|6 to a predetermined Value the ac 35
celerated release check valve 2|0 will be moved
away from the seat rib 2|4 against the spring
2|2, Vand fluid under pressure will thereupon
flow to the’ chamber |20 and thence by way of
the passages |22> and 28 to the chamber 25 on 40
the face of the diaphragm I2, and to the branch
Y ,
~
The pressure of the fluid in the brake cylinder
2 is at a relatively high value' at this time, while
the pressure of the fluid in the brake pipe | is 45
at arelatively low value sothat the fluid under
pressure supplied by way of the passage'Zllß to
the chamber 2|6 beneath the accelerated release
check valve 2|!) Vis able'to move this-valve away
from its seat against the spring 2|2,-and fluid 50.
under. pressureV will be ‘supplied from the brake
cylinder 2 to the brake pipe | to'increase the
at this time, however, so that fluid under pres- ' pressure of the fluid in the brake pipe, and in
sure cannot ñow from the chamber 40 through the chamber 26 on the face of the diaphragm l2,
through the restricted passage 44 to the cham
>ber >40 within the stem 20. The valve'48 of the
valve device 24 is in engagementfwith'its seat
the passages 50 to the chamber 32.
Y
On Vanincrease in the pressure of the ñuid in
the chamber 26 on the face of the diaphragm
so that a local increase in brake pipe pressure is 55
effected, which accelerates the release action
throughout the train.
,
Y l2 this ñuid exerts a force on the diaphragm l2
In‘ addition, the auxiliary reservoir 3 is in
tending to move this diaphragm andthe stem communication with the brake cylinder 2 at this
60 20 to the left, as viewed in Fig. lÍ of the draw
time through a'port in the service portion of
ing. This movement of the diaphragm |21 and ‘ the brake controlling valve device 5 so- that fluid 60
the stem 20 is opposed by the spring |85 oper
under pressure will flow from the auxiliary res
ating through the valve |84 and the arm 252 ervoir 3, as Well as from the brake cylinder 2,
of the rocker arm 250.
65
v
`When the pressure of the fluid in the chamber
26 has increased to a predetermined value the
force exerted by this fluid on the -diaphragm I2
is suñìcient to overcome the opposing force of
Vthe spring |85,'y and the diaphragm I2 and the
70 stem 20 will be moved away from the emergency
application position, while the arm 252 of the
rocker armw25 will press against the end of the
stem of the valve |84 and move this valve away
from its Vseat „against the spring |85. In 'addi-V
75 tion on this movement of the diaphragm l2 and
to the brake pipe |.
- When the pressure of> the' fluid inthe brake 65
cylinder 2 and the auxiliary reservoir 3 and in
`the brakepipe | have substantially equalized by
the flow of iiuid under pressure from the brake
cylinder and the'auxiliary reservoir to the brake
pipe, the'accelerated release check valve 2|!) is 70
moved'intorengagement with the seat rib 2|4A
by the spring 2| 2 so as to cut oif the further
flow of fluid under pressure from the brake cyl
inder and the auxiliary reservoir to the brake
pipe, andtoY preventback ñow'of fluid from the 75.
2518359 1.5A
brake pipe to the brake cylinder and tothe aux-`
iliary
reservoir.
~
'
"
~
,
~
Fluid under pressureisupplied tol the chamber
|18 also flows therefrom through the passage
11
32 ’hasreducedr substantially» to the. pressure in
the emergency reservoir 4' the spill-over check
valvey |26 will be moved> bythe spring |28 into
engagementî withA the seat rib |30 to cut off the
|14 to the chamber |'|2 on the spring side of ñnwV of fluid'` from the chamber 32 to the emer
theV piston |58 .of the ginshot valve device |48',' Y gency reservoir 4.
'
and when the pressure of the fluid'fin this cham
On an. increase. in the pressure of the fluid
ber has increased to a predetermined value the in the chamber 32 there will be a corresponding
inshot valve' piston V|58 will be moved by thek
10 spring |88 away from the sealing gasket |68 and
into engagement withthe seat rib’ |62; On this
movement of the-piston. |58 the stem |10 moves
the Valve |42 away from the seat rib |46 against~
the spring |48.>
'
15
As the pressure of the fluid in the chamber* 26"
builds up `the diaphragm |2 and' the stem 20l
will be moved to the left,vas viewed in Fig. 1 of
the drawing, relative'to the valve device 24ïto
the inner release position and the'` spring 56 will
20 be compressed, While the seat on the stem 28 will
be moved away from the valve 48`as'so'ciat'ed with
the valve device 24 so that fluid under pressure
supplied from the brake pipe | to Vthe chamber
48 may flow therefrom to the chamber 32 and
V25 from this chamber through the’passage 36' to
the quick action chamber 38. »
j
-
Fluid under pressure will be supplied to the
chamber 32 and tothe quick action chamber 38
from the chamber 26 only at a restricted rate
30 because of the restricted flow capacity,” of the
Apassage 44 through which fluid under pressure
flows from the chamber126 to the chamber 4|J.
As a result, therefore, the pressure of the fluid
in the chambers 32 and 38 will increasek at a
35
slow
rate.
'
.
Y
»
increasein the pressure of the ñuid in the cham
berv |94’on. theface of the diaphragm |82 of the 10
timing valve device |80., andthe ii'uid under pres
sureV in this'- chamber operating through the
diaphragm |192 will press the sealing gasket |98
against the seat rib 266'.
When” the pressure.r of the fluid in the brake 15
pipe'l haslvbeen` increased to a predetermined
value so> as- to exceed' the pressure of the iiuid
in theauxiliary vreservoir 3, the service portion
ofthe brake controlling valve device operates _as
dascribediinj detail in the above identifled'patent 20
to- release'filuidi under pressure from the brake
cylinder, 2, and to open la communication through
which fluid under pressure'may be Vsupplied from `
thebrake pipe | to the auxiliary reservoir 3 to
charge thisv reservoirV under pressure, and 25
through which fluidiunder'pressure may also- be
supplied to the emergency reservoir 4.
While one embodiment of theV brake control
lingY valve-device provided. by this invention has
been illustrated and> described in~ detail, it should 30
befSunderstOod> that the invention isV notA limited
toV4 these details> of» construction, and numerous
changes and modifications may be made without
departing from the' scope' of the following claims.
Havingffnow described my invention, what I 35
claim asfnew‘and‘ desire to secure by Letters
After a time interval the pressure ofthe iluid
in the chambers 32 and 38 will have increased Patent,;is:
‘
w1; vInaiiuid pressure brake equipment, in com
substantially to the pressure of >the fluid in theV
chamber 26 and the stem 2|) will thereupon be bii'iatiorn'af,brakeV pipe,. and an' emergency valve
40 moved bythe spring 56, assisted by the spring device comprising a movable abutment subject 40
tostlie‘opposing pressures of the iluid in the brake
|85, from the inner release position to the nor’
mal release position so that the seat on the stem pipe and-1 of the fluid in. ar pressure chamber, a
2|) engages the valve 48 associated with the valve poppet valve> controlledV byA said' abutment and
device 24 to cut off the iiow of ñuid from theY controlling ‘a passage through which fluid under
pressure may be supplied from the brake pipe 45
45 chamber 48 to the chamber 32 and to the quick
action chamber'38.
.
1
tothe pressure chamber, and yielding resistance-
.
On this movement of the stem- 20’the rocker
arm 234 will be movedin> a- counterclockwise di'
rection a small distance, but it will notbe’rnoved.
50 far enough so that the. arm 242 >on'the rocker
arm 234 will engage the endl of the stem of the
poppet valve 88 and move Athis valve away from:
its seat against the spring 98.
‘ ‘
rnejans`~ opposing movement of the abutment to
effect operation4v ofv said poppet valve to open
communication through the passage controlled
thereby.
2; Ina fluid'pressure brake equipment, in co-m
In addition, on this movement ofthe stem 28
toï'the‘opposing vpressures of the fluid in the brake
55 the arm 252 on the rocker arm 250 will Yalso be
moved a short distance in a vcounterclockwise
poppet valve operated by said abutment and
direction, thereby permitting the’valve |84 to
be moved towards its seat by the springv |85, but
the amount of movement ofY the arm.- 252 isv in-`
60 sufficient to permit the-valve |84 to be moved
toY the seated position.
w
'
'
«If'for any reason the pressure of the fluid
in the chamber 32 is increased to a valueex»
ceeding that in the emergency reservoir 4 by a
50
bination, a brake pipe, and an emergency valve
device' comprisingY a movable abutment subject
pipe ancl‘y of' theï fluid' in a pressure chamber, a 55
controlling a passage- throughY which said pres
sure chamber may be supplied with ñuid under
pressure from the brake pipe, and a poppet valve
device controlled by said abutment and control
ling: al passagev through which fluid under pres
sure maybe released from the pressure chamber.
60
' 3. Ina fluid‘pressure'brake equipment, in com
bination, abrake pipe, and an emergency valve
65 predetermined amount, as may occur ona‘rapid device comprising a movable' abutment subject 65
increase in the pressure of theñuid in the'brake- tofthe opposing pressures ofthe fluid in the brake
pipe, fluid under pressure'from the chamber 32 pipev andî of the fluid in a pressure chamber, >a
will flow past the ball check valve |34_to'« the poppet valve operated by said abutment and
chamber |32 within the seat rib |3|J,ïand it will controlling a passage communicating with the
70 move the spill-over check'valve |26> away‘from brake pipe and the> pressure chamber, and a 70
the seat rib |30 against> the spring |28-, so that poppet valve device controlled by said abutment
fluid under pressure may iiow to the chamber ~ and controlling a passage through which fluid
||4 and thence by way of the passage and> pipe under pressure may be released from the pres
ISB'to
theemergency'reservoir;4;'-
`
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‘
When the pressure of. the :ñuídiiu theYV chamber
sure 'chamber atf a restricted rate. '
4.,. In a1fl'uid pressurebrake equipment, in com 75
I2
2,132,915.
bînation, a brake pipe, andan emergency valve
valve means "operated 'on initial movement ofthe
device comprising' a movable `„abutment 'subject
to ythe opposing Ypressures of: theï'iiuid Lin ‘the’
brake pipe and of the fluid in. a pressurecham`-`
ber, a poppet valve operated by said 'abi'ltment
valve device bythe abutment to open a passage`>
through'whichY fluid may` be> released @from the
pressure chamber and operated on further move
ment of the valveV device. by the abutment to cut
controlling a passage communicating With Y 'oft communication through said passage, and
the Ybrake pipe and the pressuref chamber, and yielding resistance means opposing relative move
a poppet valve devicelcontrolled by the abutment ment between the abutment and the valve device.
10.
through said poppet valve and contro-lling?a pas--
:9. In a'fluidrpressure brake equipment, incom
sage through `vvhiclrfluid under 'pressure may be
bination, abra-ke pipe, a brake cylinder, a rese-r
released from thepressure chamber.-
voir,Y afvent valve vdevice operated uponthe sup
ply of iiuid under pressure >thereto- to vent fluid
from the brake pipe, a movable abutment subj ect
to the opposing pressures of the fluid in the brake
'
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5, Inra fluid pressure brake equipment, in com--V
bination, a brake pipe, and an emergency valve
comprising a movable abutment; subjectl to the
opposing pressures of the'fluid in the breîîke’pipe
and of the fluid in vva pressure chamben’a' valve
»device associated `vvith saidiabutrment, the valve
devicel‘being :movable with the abutment> andV
pipe andof the ñuid in a pressure chamber, a
poppet valveloperatedby' said abutment and con
trolling î-a Ypassage through VWhich fluid under
being'movable relativer thereto, the valveV device
pressure maybe supplied to the vent valve de
vice, Yand a moppet‘valve'operated by said abut
ment of the abutment relative to the valve device ’
ment and controlling a'communicatio'n through
which fluid under pressure is'supplied from the
to open: a'passage communicating with the brake
reservoir to the brake cylinder.
2o. comprising'a ppppetvvalve operated on move
pipe
valve arid
operated
the pressure
on movement
chamber,
of the
and
valve
a popp
device
vvith
the
abutment
to
open'
a
passagejthroughv
25?
which iiuidimaíy be released'from the'pressure
chamber.
`
`
"
"
.
'i
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'
`
6. In a fluid 'pressurerbrake equipment, in com
bination, a brake pipe,"¿'and an emergency valve
30 comprisingr Va movable Vabutment vsubject v'to 'theÍ
opposing pressures ofthe 'fluid in thebrake 'pipe'
and oflr'the fluid in a pressure chamber, a valve
device‘associated with saidabutmenujthe valve
~
’
i
`
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`
10. In a fluid pressure brake" equipment, in
combination, a brake pipe,
brake cylinder, a
reservoir, a vent valve device. operatedV on the 252
supply of fluid under pressure theretofto‘vent
ñuid from' the brake pipe, amovable abutment
subjectfto the opposing pressures of the fluid in
the brake-pipe and of the fluid Yin a pressure'cham
ber,V a poppet Vvalve operated by said abutment
andjcontrolling communication , through which
fluid under 'pressure' is supplied'from the pressure
chamber to the YVent Vvalvedevice, Aand a poppet
device Ybeing movable with the abutment -'and
valve operated by said abutment and controlling
' being movablel'relative?thereto?, the-valve device
comprising a poppet'valve operated on. movement
a communication through which fluid under pres'-V
surevis supplied from the reservoir to the brake
of the abutment relative to the valve devicetd
open a passage' communicating Vwith- the brake
cylinder.'
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11. In 'a giiuid pressure ‘brake equipment, in
combination, a ‘bralie pipe, a reservoir, a brake
cylindena vent valve operated on the supply of
piperand the pressure: chamber, a poppet Valve
operated on movement of thervalve device' with
the abutment to open 'a passage through which Y fluid underv pressure thereto to ventfluid from
fluid îf'nay'be releasedwfrom the pressure cham
the brake pipe, amovable. abutment Vsubject to
ber, and yielding resistance means opposing rela
thev? opposing pressures of the fluid in they brake
tive movement of the: abutment and i the valve
device,
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i
pipe and of Y'the fluid in a Ypressure chamber, the
«
7. In a'fluid pressure brake equipment, in'com
bination, a brake pipe, and
emergency valve
comprising a »movable abutment subject to the
opposing pressures ofthe fluid Ain the brakel pipe
50 and of the fiuid in a pressure chamber, avalve
abutment having
normalY position and being
pressures Tcl-f" lthe fluid operating thereon, a`poppet
valve‘con l,olling a> passage through vwhich fluid
may be supplied to` the vent valve,vv said poppet
valve fbeing operated lto ' open communication
' device associated with the -abutment, the valve i through the passagecon movement of the Vabut
device being movable With-the abutment and ment a given distanceV from the normal position;
being movable relative -to the abutment, the valve ' and a poppet valve operated >by said abutment
deviceY comprising a poppet valve öperated by and controlling aY passageV communicating with
55. movement of the abutment relative to the valveV the reservoir andlwith the brake cylinder, said
device to opena passage communicating with the valve being Aoperated to open communication
brake pipe and> Withthef pressure chamber, andr through said passage only after movement of the
60
45
movable therefrom ?in response to changes in the
poppet valve means eperated on initial movement '
abutmentîîfrom the normal'position a distance
of the valve device Vby the abutment -toppen a
greater 'than said given distance.
55
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passage through which liuid may be released froml
Y"12. In a fluid pressure brake equipment, in
thefpressure chamber and operated onffurther
combination, a brake pipe, a reservoir, a brake ,
mote-ement of the valve device by the Yabutment to cylinder, a vent valve opßl‘ated on the supply Yof
cut ofî--communication through saidpassage.Y
fluidjunder pressure thereto to vent fluid from
8.` In a fluid .pressure brake equipment, in com# the brake pipe, movable abutment subject to
binatio-n, a brake pipe, andfY an emergency valve _ the opposing pressures of the fluid in'the brakeV
comprising amovable abutment subjectto- the pipe and-of fluid inaY pressure chamber, the abut
opposing pressures of the ñ'uidz in the brake Ypipe ment having a normal position and being movable
and of the fluid in a pressure chamber, and a
Valve device associated with the abutment; the
valve deviceY being movable With the abutment and
therefrom in Vresponse to changes in the pressures '
of the 'fluid operating thereon, a ,poppet valve
controlling a passage through which fluid may be '.70
device -comprisingfa poppet valve'f operated by
movement of the abutment relative to. the valve
supplied to the vent valve, said poppet valve being
operated to open communication through said
passage on movement ofV the abutment a given
device to open a passage communicating with the.
distance from the normal positiona poppet valve
brake pipe ‘and With the pressure chamber, poppet
operated by said Yabutment and controlling a pas 75
being movable relative to the abutment, the valve’
2,132,915
sage communicating with the reservoir and ywith
the'brake cylinder, said valve being operated to
open communication through said passage only
after movement of the abutment fromthenor
mal position a distancegreater than said given
distance, and yielding resistance means'operat
ing through the first-named poppet valve `and
opposing movement of the abutment away from
the normal position.
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y13. In a fluid» pressure brake equipment, in
13
the abutment" from theznormal position towards
the application position.
16. In a fluid pressure brake equipment, in
combination, a brake pipe, a brake cylinder, an
emergency reservoir, and an emergency valve de
vice comprising a movable abutment subject to
the` opposing pressures of the fluid in the brake
pipe and of the fluid in a pressure chamber, an
inshot valve device subject to the opposing pres
sures of the fluid in ,anroperating chamber and
of the ñuid supplied ;to the brake cylinder for
combination, abrake pipe, a reservoir, a brake
cylinder, avent valve operated on the supply of regulating theßrate of s_upply of iiuid to the
iiuid under press-ure thereto to- vent fluid from - brake cylinder, a poppet valve operated by said
the brake pipe, a movable abutment subject to abutment and controlling a communication
15 the opposing pressures of -the fluid in the brake through which ñuid is supplied to said operating
pipe and of the fluid in 'a pressure chamber, the chamber, and a poppet valve operated by said 15
abutment having anormal position and being
movable therefrom in response to changes in the
pressures of the fluid operating thereon, a poppet
20 valve controlling a passage through whichv fluid
may be supplied to the vent valve, said poppet
valveV being operated to open`V `communication
abutment for controlling communication fromthe
emergency reservoir to the brake cylinder.'
» 17. In a„_iiuid pressure brake equipment, in
combination, a brakeY pipe, a brake cylinder, and
an .emergency valve device comprising a vent valve
operative on the supply of fluid under pressure
through said passage _on movement of the abut- « thereto'to vent fluid from the brake pipe, an in
ment a given distance from the normal position, shot valve device subject to the opposing pres
25 .a `poppet valve operated by said abutment and
sures of the ñuid supplied to the brake cylinder
controlling a passage ‘l communicating with >the and of the fluid in an operating chamber, a poppet 25
reservoir and with the brake cylinder, said valve valve controlling the supply of ñuid to said vent
being operated to open communication through valve,_ a poppet valve controlling the supply, of
said passage only after movement of the abut-V
30 ment from the normal position a distance greater fluid to saidoperating chamber, and a movable
abutment subject to the opposing pressures of 30
than said given distance, and yielding resistance the fluid insthe brake pipe and in a pressure
means opposing movement of the first-named chamber and operative on a sudden reduction in
poppet valve to open communication through the the pressure of the fluid in the brake pipe to
passage controlled thereby.
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first open the poppet'valve controlling the supply
35
14. In a iiuid pressure brake equipment, in of fluidto the `vent valve and to then permit the 35
combination, a brake pipe, a vent valve operated poppetvalve controlling thesupply of fluid to the
on the supply of iiuid under pressure ythereto to operatingchamber of the'inshot valve device to
vent fluid from the brake pipe, a movable abut
seat.
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ment subject to the opposingY pressures >of the
ñuid in the brake pipe and of ther fluid ina
18.»_In’a fluid pressure brake, in combination, a
brake pipe, a brake cylinder, an emergency valve
pressure chamber, the abutment being movable> device comprising a movableabutment subject to 40
between a release position and an application' the opposing. kpressures of the brake pipe and a
position, a poppetvalve` operated by the abut
pressure chamber and valve means operated by
ment on movement from the release position to said abutment'upon a sudden reduction in brake
theapplication position to open communication pipe pressure for effecting an emergency ap
through a passage through which fluid under pres
plication'of the brakes, an inshot valve device 45
sure may be supplied to the vent valve, and a subject to the opposing pressures of the brake
spring operating through said poppet valve and cylinderand an operating chamber for regulat-V
opposing movement of the abutment to the ap,
ing the rate of flow of fluid under pressure to the
brake cylinder, valve means operable by said
50 plication position.`
15. In a fluid pressure brake equipment, in abutment and normally establishing communica 50
combination, a brake pipe, a vent valve operated tion from the brake cylinder to a passage which is
on the supply of fluid under pressure thereto to constantly connected to the brake pipe and to said
Vent iiuid under pressure from the brake pipe,` operating chamber to prevent the operation of
55 a movable abutment subject to the oppOsing pres „ said inshot valve device in effecting a service ap
sures of the fluid in the brake pipe and of the plication of the brakes, said valve means being 55
fluid in a pressure chamber, the abutment being ` operated to close said communication upon move
movable between a normal position» and an ap
ment of said abutment in effecting an emergency
plication position, valve means operated by said application of the brakes and to open said com
60 abutment and controlling a passageY through munication upon movement of said abutment
60
which fluid under pressure may be released from
upon an increase in brake pipe pressure after an
the pressure chamber, the valve meansrbeing
conditioned to cut off communication through
said passage when the abutment is in the normal
65 position or in the application position and being`
emergency application to permit the venting of
fluid from the brake cylinder to the brake pipe,
and means for preventing back flow from the
conditioned to open communication` through said
passage when the abutment is intermediate the
normal and application positions, a poppet valve
operated by said abutment on movement tothe
70 application position to open communication
through a passage through which fluid under
pressure may be suppliedto the vent valve, and
a spring operating through said poppet valve and
yieldingly opposing further movement. of the
75 abutment after a given amount ‘of movement of
brake pipe to said passage.
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~ 19. `In a fluid pressure brake, in combination,
a brakeV pipe, `a brake cylinder, a reservoir, and
_an emergency valve device comprising amovable
abutment subject to the opposing pressures of
the fluid in the brake pipe and of the -fluid in 70
a pressure chamber, means »operated by said
abutment for supplying iiuid from the reservoir
to the brake cylinder, an inshot valve device sub'
ject to the opposing pressures of the fluid 'sup
plied to the brake cylinder and of an operating 75
2,132,915
il 4
`chamber for' regulating therate of floW of fluid
to the brake cylinder, valve means 'operated by
said abutment for supplying fluid from the brake
cylinder to acommunication which is constantly
Ul connectedto said operating chamber and to the
brake pipe, and valve means for preventing back
flow of> fluid from Ythe brake pipe to said com
munication.
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to' saidivent valve and tosupply fluid from the
reservoir to the brake cylinder, Ymeans yield
ingly opposing movement of the abutment to
the application position, an inshot valve device
subject to the opposing pressures of ' the fluid
supplied to the brake cylinderjand of the ñuid
in an operating chamber for regulating the rate
of supply of fluid to the brake cylinder, means
'
controlled by the abutment and operative .on
movement of the abutment to the normal posi ,10
tion- to supply fluid from the brake cylinder to
reservoir, and an emergency vValve device com
a communication- Which‘is constantly connected
prisingra movable abutment subject to the op
posingpressures of the ñuid inthe brake pipe ~ to the brake pipe and to said operating chamber,
and in an ‘operating chamber, said abutment said means being operative `on'movement of the
abutment to'the operating position to cut off 15
15 being movable between a normal position and
an application position, means operatedbythe the supply of ñuid'to said communication, and
a check valve forpreventing back flow of ñuid
abutment on movement to the application po
sition to Vsupply fluid under pressure vfrom the `from the brake pipe to'said communication.
22. In a fluid pressure brake equipment, in
reservoir to the brake cylinder, an'inshot valve
combination, a brake pipe, a brake cylinder, a 20
.2O device/'subject to the opposing pressures of the
reservoir, a movable abutment subject to the
Y fluid supplied to the brake cylinder and of the
fluid in an operating chamberfor regulating the opposing pressures of the fluid in the brake pipe `
rate of supply of ñuid' to the brake cylinder, “ and of the ñuid in a pressure chamber, said
valve means controlled by said Í abutment and abutment being-movable between a normal po
20. 1n a ,fiuid pressure brake equipment, in
combination, a brake pipe, .a brake cylinder, a
operative .inl the normal position of the abutmentY
to’v «supply ñuid under. pressure from the brake
Y cylinder to a communication which is constantly
_ connected to the brake pipe andlto said operat
ing chamben'said’valve means being operative
30 upon 'movement vof the abutment to the appli
cation position- to cut off the supplyof fluid to
said communication, and valve means forpre
venting backv flow of fluid from I,the brake pipe
to .said communication.
35
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21. In a iluid pressure brake, in combination, .
a brake pipe, a brake cylinder, areservoir, and
' emergency
Y an
valve Adevice comprising a movable
abutment subject ¿to the opposing pressures îof
sition and anapplication position, means oper 25
ated .by said abutment on movement' to the ap
plicationposition to supply >fluid from the res
ervoir to the brake cylinder, inshot valve means
subject'to the opposing pressures of the fluid
supplied to the brake'cylinder and of an Aoper 30
ating chamberfor regulating the supply vof fluid
to the brake cylinder, means controlled by ysaid
abutment and operative in the normal position
thereof for supplying fluid Vunder pressure from
the brake Vcylinder to a communication which 35
is constantly connected to> said operating cham-'
ber and tothe brake pipe, said-means being
operative in the application position of the abut
the fluidin the brake pipe and of the fluid in a ment to cut olf the supply ofgfluid to >said' com
pressure chamber, said abutment lvbeing movable ‘ munication, a'check valvey for- preventing back
between a normal position and anv application flow of fluid Vfrom the brake pipe to. said com
position, a vent valve operative upon an increase munication, and means yieldingly opposing move
Vin iluid pressure to ‘vent fluid from' 'the' brake ment ofthe abutment from the application vpo
sition toward the normal position. ` d
pipe, means operative on movement of ‘the abut
mentto the application position'to supply fluid
'
BURTON Sç'AIKMAN.
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