US1503889A - Fluid-pressure system - Google Patents

Description

V Aug. 5, 1924. 1,5o3,ss9

- W; J. FENDNER ELUID PREssuRE SYSTEM Filed Sept. 9 1920 3 Sheets-Sheet 5 l to:

"i lllII-IIIIIIIII s i wmvessfe; I Q VU Ng/'ENTOR 44W Patented Aug. 15E 1924.

UNITED STAT-Es.

PATENT OFFICE.

WILLARD J'. FENDNER, OfE IPITTSBURGH, PENNSYLVANIA, ASSIGN'OR TO CLAEK CAR COMIBANY, A COEPORA'I'IQN OF PENNSYLVA'N'IA.

i FLUID-PRESSURE SYSTEM.

Application med september 9, 1920. serm No. 409,192.

To aZZfwhomitmay-ooncem:

Be it known that I, WILLARD J. FENDNER, a citizen of the United States, and a resi- V dent of Pittsburgh, in the county of Alleghenyv and State of Pennsylvania, have made a new and useful Improvement in Fluid-Pressure Systems, of which the following is a specification. vi

My invention relates to railroad rolling stock and in particular to dump cars operated by -fluid pressure such as compressed air. The mechanism by which the car doors are secured and operated and the car dumped may vary and those familiar with the art are aware of the multitude of dumping mechanisms now in existence. The particular mechanism used is unimportant as my invention consists in the fluid pressure control system. I refer to U. S. Letters Patent No. 1,333,293, Clark et al., March 9,1920, for a detailed disclosure of a tilting body dumpv car provided with side doors hinged near the body fioor and in which the body is released' from an upright position and tilted to one side and the doors on that side opened to dump the load. The body is subsequently returned to and secured in upright position and the doors closed. All of 'these operations are performed automatically by control of compressed air.-`

My system disclosed herein has been applied to a car of the above type and in the drawing. accompanying this specification and forming part thereof the arrangement of the piping and apparatus is adapted for such a car which car is indicated in part by dot and dash lines.

Figure 1 is a side elevation of thesystem in place on the car; Fig. 2 is an elevation, on a larger'scale, of either end of the car and as much of the 'system as is located thereon; Fig. 3 is an enlarged side elevation adjacent the transvers center line of the car; Fig. 4 is a plan o the apparatus and piping shown -in Fig. 3; Fig. 5 is a view on line 5-5 of Figs. 1 and 3 and showing a part of the 1body and door control Imechamsm; Fig. 6l is a view on line 6-6 of Fig. 4, and Fig. 7 is a side elevation of apparatus and piping omitted from Fig. 1 to more clearly disclose parts located in the rear thereof. Fig. 8 is a sectional view illustrating a valve and valve-operating mechanism such as disclosed and claimed in usual trucksand has upstanding ends B between which, and tiltingly mounted on the underframe,'is the body O. The sides of the car are formedof doors D which are so lunged to the underframe and body that tiltlng of the body to one side swings the doors on that side to an open position where they form an extension of the car floor. The body is normally locked in an upright position and when the car is to be umped, it is first necessary to release the door latchin th dumping position.

The looking mechanism on the left hand side of the body is mounted ond a looking shaft E (Fig. 5) and is released 'by rotation of the shaft in a clockwise direction. The

body is then tilted 'to the. right 'by being` pushed sideways at both of its ends. This rotation of shaft-E and the pushing of the body is accomplished by the following apparatus:

A reservoir tank 1 is mounted 'on the underframe A and is supplied with air by the thru train line supply line 2 thru a union T 3, a connectin pipe 4, having a dust collector 5, (Fig. g) a check valve 6 and a cut-out cock 7 and entering the reservoir 1 thru a union T Sand a branch 9. A latch operating cylinder 10 is mounted on underframe A between the underframe sills and displacement of its piston 11 (Fig. 5), thru levers F and G, rotates latching Shaft E. To operate cylinder 10, air passes from reservoir 1 thru a car operating line 12 (Figs. 1 and 2) to valve 13, from where it is controlled manually, to piping 14 which unites with a thru train operating line 15 leading thru a unionHT 16 (Fi (fl) and a cut-out cock 17 to the latch sha t operating cylinder 10. Valve 13 is controlled by a handle 24.

When piston 11 has been thrust to its lowermost position, it has operated to release the latch mechanism and it uncovers a port 18 in the wall of cylinder 10 which leads thru piping 18 to a reservoir operating valve 19' (described and claimed inUnited States patent to Clark, No. 1,373,599 of April 5, 1921, which is thereby automatically opened permitting the air in reservoir .1' to pass thru piping 20 directlyto both mechanism and to then tilt the body to ends of the'car where it is admitted, thru a relief valve 21 (forming -the subject matter of a copending application,` Serial No. 345,669, Clark et al., 1919,) to the body tilting cylinders 22.

'. These cylindersv are pivotally mounted upon piping '14 with an atmospheric-exhaust or' dump cylinders.

the air in 'the thru train operatin lme 15 'is exhausted at a remote point by e operator) and the action of spring H raises piston 11.' f The supply of operating air thru port 18El being4 terminated, and the rising piston 1-1 reducing the pressure in line 18, 'valve 19 automatically closes the passage from reservoir 1 to pipe 20 and opens an exhaust port 25 which permits the operating cylinders to-exhaust therethru and their pistons telescope and the car body'is returned to upright position by the relative position of the center ofgravity andV the pivotal point of support on the underframe as disclosed in co-pending application Serial No. 256,130, Clark, filed September 28, 1918.

The valve 19 and its 'operating mechanism isdi'sclosed in Fig. 8. As there shown; the valve proper controls the delivery of actuating fiuid through the ports a and b, the port a: communicating -witli the source of fiuid pressure and the port b With the The valve casing is formed integrally with a valve-operating cylinder in which a difl'erential piston d is located.

This cylinder is provided with the exhaust' port 25 which is so located that the port b is iii open communication with the port 25 when the piston d is. in such a position that the valve 19 is closed. The lower end of the cylinder is provided with a port e which communicates with the latch-operating cylinder 10 through the piping 18. Valve. 19 is provided with 'a spring for holding it to its seat and the piston d is provided with a spring for assisting the valve-closing movement of the piston. 1

To tilt'the heavy body requires a large amount of work. This requirement is accentuated by the uneven path of travel for the body on the underframe, as detailed in application Serial No. 256,130, Clark, filed September 28, 1918, which creates a peak load on cylinder 22 at theJ beginning of its movement. To carry this load and to provide for the-large piston displacement and to Vavoid exc'essive friction in connecting piping and 'abnormally large air pressure in reservoir 1, a relatively large piping from the. reservoir to ;fbylinders 22 ..is necessary compared with thtrequired for'cylinder 10 and valve 19. `filed December 17 1 To use the samef'piping'- for cylinders 22 and for cylinder 10-:meanf's either a too violent thrust and 'sudden stopping o'f'vpistoni.

11 in cylinder 10 andthe'mechanism operatedI thereby with destruction of: piston Vpacking, bearings and-high air friction, or,

a slow, ineflicient'operation of cylinders 22 and the car body, if 'operated atl all'. My

construction avoids 'these difliculties 'while utiliz'ing the advantagesof a single manual control of the operating line and Vautomatic control of thecar dumpingmechanism; Th

piping arrangement. shown enables me to install any appropriate sizeof pipe for the -control line 'and any different size pipe de-" sired for the operating line; T-his arrangement could not' be followed with any previously used system with which I am familiar. v

I claim V 1. In combination With a tilting body dump car having Va latch operating mechanism for looking the body in' a'n upright position, a-dump cylinder operatively 'connected to the body, a latchv operating cylinder having an inlet port and a piston controlled fiuid delivery port, a pistonV operating therein and operatively coupled to rthe latch operating mechanism, a' source of fiuid pressure, an automatic valve for controlling delivery of fiuid' from said source toI said dump cylinder and for exhaustingsaid dump cylinder, a valve operating cylinder connected to thedelivery port of said latch 'operating cylinder, a valve operatingpiston located in said valve operating cylinderl for actuating said automatic valve, anda manually operated valve for controlling the delivery of fiuid from said source to said latch operating cylinder and the exhaust of fiuid 'from said latch operating cylinder.

2. In combination with the tilting body' of a dump car and the-latch operating mechanism for holding 'thebody in an upright position, a latch' operating cylinder having a combined inlet and' discharge port, and a piston controlled fluid'delivery port, a dump cylinder lhavin a combined fiuid inlet and 'discharge por a. source of fiuid i :located therein for operating said automatic valve, and a. manually Voperated valve for controllingthe delivery -ofoperatin fiuid to and the dischai'geofoperating flui from the combined inlet and discharge port of said latch operating cylinder.

3. In combination with the tilting body of a dump car having a latch-operating mechanism for looking the'body in an up- 'i eryv port, a piston operating in said cylinder to open and close said delivery port, a source of fluid under pressure, a manually-controlled valve for delivering fluid uiider pressure to said latch cylinder, a separate' valve for establishing and cutting oil' direct communication between said sourceof pressure and said dump cylinder, a co-operating Vcylinder and pistonfor actuating said valve and for controllin the exhaust of operatingfluid from sai cylinder, and means for delivering fluid from said latch-operating cylinder to operate said last-mentioned piston. 1

4. In combination With the tiltin body of a dump car, a latch-operating mec anism for looking the body an upright position, `a dump cylinder operatively coupled to the body, a latchfoperating cylinder having a piston-controlled fluid-delivery port, a fluid responsive piston located Within vsaid cylinder for Controlling the delivery of fluid through said port, a source of fluid under pressure, a manually-controlled 'valve for Controlling the deliveryof fluid from said source to said cylinder and the discharge of fluid from said cylinder and a separate valve mechanism responsive to ;variations in fluid pressure Within said latch cylinder for' establishing and cutting ofldirect communication between said source of pressure and said dump 'cylinder 'and` for enhausting said.

dump[ cylinder. V

, 5. n combination with the tilting body of a dump car, a dump cylinder operatively coupled to said body, a source of fluid under pressure, an automatic valve for Controlling the delivery of fluid from said source to said cylinder and the discharge offiuid from said cylinder, a. valve-operating cylinder, a fitii'd-pressure-actuated valve-operating piston` located in said cylinder, a second cylinder of greater volumetric capacity than said valve operating cylinder and having a piston-controlled port formed' therein for establishing communication With said valveoperatin cylinder, a fluid pressure controlled plston operating within said second cylinder for controlling said portl to admit fluid under pressure to said valve-operating cvlinder and for reducing the pressure vwvithin said valve-operating cylinder while 'moving in response to a reductionin fluid pressure, and a manually controlled valve for Controlling the delivery of fluid from said source to said second cylinder.

In jtestimony Whereof,.I have hereunto subscribed my name 31st day of August, 1920.

WILLARD J. FENDNER'.

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