US936905A

US936905A - Automatic brake-applying device.

Info

Publication number: US936905A
Application number: US48279709A
Authority: US
Inventors: Earl P Jessop
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-03-11
Filing date: 1909-03-11
Publication date: 1909-10-12
Anticipated expiration: 1926-10-12

Description

1a. P. Jrgssol AUTOMATIC BRAKE APPLYING DEVICE..

APILIOATION IILBDVIHE. 11, 1909.

2 SHBETBTSHEET 1.

- Patented oat mme Pneus, un. Lmn.. wxsnmmou, D c.

E. LJESSOP. y AUTOMATIC BRAKE APPLYING DEVICE. APPLIOATION FILED MAR. 11, 1909.

936,905. Patented oct.12,1909.

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EPJe$30p noms Puras lu: umm, msmnsm. D. tx

EARL r. .'iEssoP, or THE UNITED ,STATES NAVY.

AUTOMATIC BRAKE-APPLYING DEVICE.

Specification of Letters Intent.

VApplication tiled Iaroh 11, 1909. Serial No. 482,797. v

tion of the invention, such as .will enable others skilled in the art to which it appel'- tains to make and use. the same.

. lever carried by the car or train striking section along the line 6-6 of said block, and mechanism controlled by said lever for setting the brakes and maintainingthe parts in the thrown position until the.

action reversed by manually controlled mechanism, as will be hereinafter described.

My invention will be understood by reference to the accompanying drawings, in

which the saine parts are indicated by the same letters throughout the several views.

Figure l is a side elevation ofthe device as applied to the cab of an engine, the lcab and tender being indicated in' dotted lines.

Fig. 2 'illustrates diagrainlnatically the connection of the various parts. Fig. 3 shows a section through the valve mechanism controlled by the lever. Fig. 4. shows a section `through the valve mechanism manually controlled by the engineer. Fig. 5 is a plan view of the track device. and Figl' shows a Fig. 5, looking in the direction of the arrows.

Referring to Figs. 1, 2. 5 and (i, A represents one of the-track rails. B represents a tripping block,4 having wedge faces whose angle of inclination may be varied to suit the conditions as to speed, etc., likely to be encountered. This tripping block is hinged, as at l), to the cross-ties, and may be thrown into and ont. of operative position, as shown in full and dotted lines in Fig. 6, by a rod C, and any suitable device D which may be operated either by hand, or from a distance, 'as is well known in the art.

F, see Fig. 2, is a lever pivoted, as at f', t the plate E, secured to the cab of the engine, which leverl carries at one endthe roller j', and at the other end is connected by the link G and block H'to the piston valve H,which will be. hereinafter called the operating "UNrrED sTAfriis forriion.

Patented Oct. 12, l1.909.

valve, while the valve in the cab will be hereinafter called the engineer-s valve. This piston valve H is in the form of a cylinder cut away, as at h and h', (see Fig. 3), and is provided with a pistonjh2 at its upper end, tit snugly in the largechamber I ofthe 'cylindrical valve casing I, which casing is pro vided with an exhaust port i, which exhaust port registers with the annular chamber Il when the valve is in the raised position shown in Fig. 3'. It will be noted that the distance between the port z' and the inlet of the pipe R is materially less `than the throw of the valve H', to secure results hereinafter to be explained. Projecting from the block H, and moving with the valve H', is the stud K, connected to therod K', which is pivoted to the a'rm K2 of the valve L, which valve is connected by. the hose M to the train pipe M', see Fig. 1.

" N represents an air flask, connected by the pipe a tothe pressure pipe O, which pipe is connected at its other end tothe port p in the valve casing P, containing the engineers valve Q. This valve casing is provided with ports p and p2 open to the atmosphere, p3 connected to the pipe S, and p* connectedl to the pipe T, and p' connected to the pipe R. The pipe S opens into the upper end of the valvel casing I, above the piston 71,2. The

The pipe O is provided with into the annular chamber li, and the other end'of this pipe opens into the casing P beneath the valve Q, as shown in Fig. 4. The valveQ is in the. form of a cylinder with annular chanibersg and g2 separated by thel rib' g, fitting snugly in the valve casing, -as shown in Fig. 4. This valve may be con' trolled by hand by means of the lever `Q2 v and link Q. Qf' is a stop provided to limit the throw of the lever Q2.

The operation of the device is as follows 'It heilig desired by the station operlatoi' to apply the brakes to the train, he throws the tripping block B from the position indicated in dotted lines in Fig. 6 to the position indicated in full'lines in said figure. Then when the train approaches, the roller f will roll up on the inclined surface of said H down. The downward movement of this valve will cause the "od K to open the valve L, and permit the escape of air from the train pipe, which will'apply the emergency operation of the brakes in the usual way. The downward 'movement of the valve H' will close the lexhaust port 2', and will nnmask the port 2'", permitting pressure to flow through the branch pipe R and pipe R to the lower end of the valve casing P.

v`This will `:torce the engineers valve up until its movement is stopped by the lever Q2 striking the stop Q3. In this position, the pipe T will be open -to the atmosphere through the port p2, thus relieving the pressure in the chamber I beneath the piston h2 and the exhaust' port p' will be closed, causing pressure to flow from the pipe O through the pipe S to the upper side of the piston h2, and thus the pressure from the pipe O'Will hold the" engineers valve in the raised and the operating valve in the lowered position indefinitely. It will be seen that the valve H need only be moved through a small part of its travelby the lever F before the port v" is unmasked wlienthe further movement 'of the valve H willbe automatically effectedfby the air pressure.` The amount of lift which the tripping block B will impart to the lever 'F, resulting` in a corresponding pull on the 'valve H', will vary on account of the jump and vibration of the train, and if this lift of the lever F alone were depended upon to complete the motion of the parts, a varying throw would be secured, and possibly alsoan insufficient throw of the train pipe valve L; also the engineers .control would be less satisfactory.

' dien it is desired to restore the parts to the initial position. the engineer presses down on the lever Q2, restoringthe eiigineers .valve to the position shown in Fig. 4. This will allow the pressure fromthe pipe S to es ape tlirough'the port p and the pressure from the pipe O to flow into the pipe T, forcing'the operating valve upward again, andy unmasking the exhaust port i. which will relieve the pressure Vin the pipe R. and

the engineeris valvewill remain seated, due

to its -own weight. Thus it will be seen that l provide automatic means tor setting the S brakes and for holding them set until released by the eiigiiieei. or other operative if the car.

The device being air controlled on a full pressure and wide open exhaust system. it is not liable to be thrown out of order by leakage.v Moreover. it is very simple in construction and arrangement, and is not liable to get out of order from other causes.

if the engineers valve is pulled up by hand,

pressure will be applied through the pipey S to the top of the piston h2, which will It will be obvious that any suitable signal' 'may be controlled b v the movement either of the engineers valve or of the operating valve if desired.

Having thus described my invention. what l claim .and desire to secure h v Letters Patent of the l'nited States is:-

l. In a system of the cha acter described. the combination with a movable tripping block located on the road-bed. a lever carri-xd by thecar and adapted to strike said trip ping block when in the operative position. valve mechanism operated liv said lever. means controlled b v said mechanism for var ving the pressure in the train pipe. a second valvf,` mechanism controlled h v the operation 'of the first. a source of fluid pressure connected to both valve mechanisms` and a system o'tvpipes connecting the said valve mechanisms. whereby the throw ot' the firstvalve .effects the throw of' the second. and restoring the second valve to the initial position effects the restoration of both mechanisms to said position, substantially as described.

ln a system of the character described. the combination with a movable tripping block located on the road-bed, a lever carried by the ear adapted to strike said tripping block when in the operative position. valve mechanism operated by said lever, means controlled b vsaid mechanism for varying the pressure in the t'rain pip a second valve iiwcliaiiisin controlled by the movement of the first val e.nieans formoving' said second Valve by hand, a source of fluid pressure.connected to both valve mechanisms. and a s vsteni ol' pipes connecting the said valve mechanisms. whereby the throw of the first valve elt'ects the restoration (if-both mechanisms to Said position. substantially as described.

il. ln a svstein of the character described. the combination with a movable tripping block located on the road-bed, a lever carried h v the. carV adapted to strike said tripping block when in the operative position, a valve casing provided with a. series of inlet )Orts and an exhaust port. a slide valve in sai easing and operated by said lever, means controlled by the movement of said valve for vai-ving the pressure in the train pipe, a second valve casing provided with a ilurality i of inlet and exhaust` ports, a slice valve Should it be desired to test the apparatus,

mounted in said second valve casing, a source of fluid pressure connected to both valve casings, and a system of pipes connecting the said inlet ports in the two casings, whereby the throw ofthe first valve etfects the throw ltlt) of the second, and restoring the second valve to the' initial position e ti`ects the restoration of the first valve to said position, substani tially as described.

4. Iii a system of the character dcribed, the combination with la movable trippingl block. located on the road-bed, a lever carrie by the caradaptcd to strike said tripping lblock when in the operative position, a. valve casing provided with a series of inlet ports and an exhaust port, a slide valve in said casing and operated by said lever, means con.-

Vtrollcd b v the movement of said valve for varying the pressure in the train pipe, a sec- 'oiid valve asing provided with a plurality of inlet and exhaust ports, a slide valve mounted in said second valve casing, a hand lever connet-ted to said second valve, a source of Huid pressure connected to both valve casings, and a Asystem of pipes connecting the said inlet ports in the two casigs, whereby the throw of the lrst valve etl'ects the throw of the second. and restoring the second valve to the initial position etl'ects the restoration of the first valve to said described.

5. In a system of the character described, the 'combination with .a movable tripping block located on the road-bed, a lever carried by the car and-adapted to strike said tripping block when in the operative position, a valve casing carriedby the car, a valve mounted in said casing and operated by said lever, a second valve casing also carried by the car, a valve mounted in said second casing, a source of fluid pressure connected to both valvefcasings, suitable inlet and exhaust p'orts'in said casings, and a system of pipes connecting the said valve casings, whereby the throw of the first valve effects the throwof the second, and restoring the second'valve to the initial position effects the restoration of the lirst valve to said position, substantially `as described.

(i. `ln a system of the character described, the combina-tion with a movable tripping block located on the road-bed, a lever carried by the car and adapted to strike said tripping block when in the operative position, a valve casing carried by the car, a .valveniounted in said casing and operated by said lever, means var 'ing the pressure in the ti'ain pi e, alsecondvalve casing also carriedby t e car, a valve mounted in'said second,casing,a hand lever connected to said second valve for moving the same by hand, if desired, a source of lfluid pressure connected to both `valve casy ings, suitable inlet. and nexhaust; ports in said' position, substantially as.

vend o said casin scribed, comprising a lever carried bv tlu car, means located on the road-bed t'or tripsired, means operated b v the movement of i the said piston valve for opening and closing `said train pipe valve, ra yvalve casing I for said piston valve, provided with an enlarged chamber I to-receive said piston li, and

with an'exhaust port z' normally registering .n

with said annular recess la. an engineer's valve Q in the form of a piston provided with annulargrooves q', g2, a casing P for said eneineers valve provided with exhaust ports p and p2 opening into the-atmosphere. ports p3, g2 and p* located between said cxliaust ports, and a port pf' opening into thcl end of said casing P, a source ot' pressure. and pipes O, O leading therefrom to both piston valve casings, the pipe R opening` into said port p", and into the valve casing I opposite the annular roove It when the valve H is in the norma position. a branch pipe R opening 'into said casing I abreast said annular groove h', the pipe T connecting saidport if* and the chamber I at the lower side of the piston h2, and the pipe S connecting said port p3 and` said chamber I at the upper side of said piston, substantially 'as and for the purposes described.

8. An apparatus of the -character described, comprising a lever carried by the car, means located on the road-bedfor trip'- ping said lever when desired, a piston valve H provided kwith annular grooves h, i, and piston h2, a valve connected to the train pipe for relieving the pressure therein when desired, means operated by the movement of the said piston valve for opening and closing said train pipe valve, a valve, casing I for said piston valve provided with anenlargcd chamber I .to receive said piston h2, and with yan exhaust port z' normally registering with said annular recess h, van engiiieers valve Q in the form of a piston provided with annular grooves g', g2, a casing P for said en ineersvalve provided with exhaust ports y) and p2 opening into the atmosphere, controlled by the movement ofpsaid valve for orts p3, p and p* located between said exmust orts, anda ort p openinr into the a source efe pressure, and pipes O, O eading therefrom to both piston valve casings, the pipe R opening into said port p, and into the valve casing I op osite the annular groove, li when the va ve 'Hf is in the normal position, a branch pipe R o eniiig into said casing I abreast said annu argroove i, the pipe T connecting said port p4. yand the chamber -I at the lower side of the piston h",'and the pipe S connecting said ort p3 and said chamber I l at the upper si e of said piston, the hand -lever Q2 connected to said engineers valve,

iso

/ried by the car' adapted to Str'ike said` tripping block -when in the operative position,

` a valve casing provided vwith a series'of inlet ports' and an exhaust port, a slide valve 4iii-said casing' and moved through a part onlvof the' throw by said lever. nieaiii: controlled hy the movement of said valve for" I Varying the pressure in the train pipe. a second valve casing provided with a plurality'of inlet and exhaust ports. a slide `valve mounted in Said second valve easing,

a source of fluid priwsure connected to both valve casings, and a system ot' pipesI connecting-the Said inlet ports in lthe tivo cas.- f ings. whereby the partlal throuj ofthe first valve-by the lever e'ects the coniplete' throwof the first valve, and the complete throw of this valve eifects the throuo lthe second, and restoring the Second valvel tothe initial position effects the restorftlon of the first valve to said position Substantiall.' as described. 'ln testiinonv whereof, iIaix niy signature, in presence of two witnesses.v

EARL I. JESSOl.