US1114822A

US1114822A - Fluid-pressure brake.

Info

Publication number: US1114822A
Application number: US56457710A
Authority: US
Inventors: Walter V Turner
Original assignee: Westinghouse Air Brake Co
Current assignee: Westinghouse Air Brake Co
Priority date: 1910-06-02
Filing date: 1910-06-02
Publication date: 1914-10-27
Anticipated expiration: 1931-10-27

Description

W. V. TURNER.

FLUID PRESSURE BRAKE.

APPLIUATION FILED JUNE 2, 1010.

Patenteu Oct. 27, 191 i THE NORRIS PEYERS (20.. PHOTO-until. WASHINGTON. D. C.

ran) srawnnr onnion.

WALTER V. TURNER, OF EDGEWOOD, PENNSYLVANIA, ASSIGNOR T0 THEWESTING-w HOUSE AIR BRAKE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

FLUID-PRESSURE BRAKE.

Specification of Letters Patent.

Application filed June 2, 1910. Serial No. 564,577.

tion.

to maintain said train pipe pressure at a desired degree of pressure. In one position of the brake valve usually termed the running position, this feed valve device is connected to the train-pipe so as to supply fluid thereto. In order to insure the release of the brakes after an. application, a full release position is provided in the brake valve, in whichposition the main reservoir is connected directly to the train pipe so that fluid at the excess pressure of the main reservoir is supplied to thetrain pipe. This higher pressure insures the movement of all the triple valves to release position even if the pressure on the auxiliary reservoir side of the triple valve is high or the train is long, so that there is considerable fall in the pressure of fluid fed to the train pipe, from head to the rear. In some classes of servlce, such as traction service, a simple formot' brake valve is sometimes employed in which there is no full release or excess pressure position, so that the release of the brakes is de pendent upon the ability of the standard pressure carried in the system as supplied by the feed valve to effect the release of the brakes.

The principal object of my invention is to provide means, where an equipment of the above character ,is employed, for enabling the engineer or motorman to supply excess or full main reservoir pressure to the train pipe when desired.

In the accompanying drawing; Figure l is a diagrammatic view of a. car brake equipment with my improvement applied thereto and Fig. 2 a sectional view of a feed valve device embodying my invention. 1 A motor car brake equipment is shown in Fi 1, comprising the usual train pipe 1, auxi iary Patented Oct. 2'7, 1914;.

reservoir 2, brake cylinder 3, triple valve device 4, and a brake valve 5 of the type havmg no excess pressure or full release position.

to a main reservoir 7 and is provided with a feed valve device 8 embodying my improvement.

While my improvement is adapted to be applied to various other types of feed valves, in Fig. 2 of the drawin a feed valve device or the slide valve type is shown, comprising a casing having apistonchamber 9 containing a movable abutment 10 and a valve chamber 11 containing a slide valve 12. In the running position of the brake valve, the valve chamber 11 is connected by passage 13 through ports in the brake valve 5 to the main reservoir 7, and the valve 12 controls communication from the valve chamber 11 to a port 14 which opens into a passage 15 leading to the train pipe 1. A diaphragm 16 is provided which is subject on one side to the pressure of an adjustable spring 17 and on the opposite side to train pipe pressure admitted thereto through passage 15. The diaphragm 16 isadapted to operate a valve 18 for controlling communication from a passage 19, leading from the outer face of the abutment 10, to train pipe passage 15. The movable abutment 10 fits loosely within the piston chamber 9, so that fluid from the main reservoir equalizes into the piston chamber at the outer face of the abutment The brake valve 5 isconnected by pipes 6 10. A spring 20 tends to maintain the abutment at its inner. position when the fluid to running position, train pipe pressure is admitted to the diaphragm 16 and if this pressure is less than the pressure at which the spring 17 is adjusted, the diaphragm operates to open valve 18 and permit air to flow from the piston chamber 9 to the train pipe passage 15. Fluid under pressure is thus vented from one side of abutment 10 and the same moves over and opens valve 12 to admit fluid from the main reservoir 7 to the train pipe. When the train pipe pressure has increased to a point slightly in excess of the pressure of the spring17, the diaphragm 16 permits the valve 18 to close and the fluid pressure equalizing on opposite sides of the movable abutment 10', the spring 20 moves the abutment 10 to close the valve 12.

According to my invention, in connection With the feed valve device, a manually controlled valve 21is provided which is adapted to control the venting of fluid from the piston chamber 9 toports 22 opening to the at mosphere. I

A bush button 23 is arranged in the cap 24: and is adapted to be operated to open the valve 21, the valve being normally held seated by a spring 25. A convenient way of arranging the valve 21 and spring 25 is shown in Fig. 2, in which the stop pin 26 is provided with a socket 27 in which the valve and spring are carried.

hen it is desired to supply fluid at the full main reservoir pressure to the train pipe, the push button 23 is pressed in and the valve 21 thus operated to vent fluid from piston chamber 9. The movable abutment 10 then shifts the valve 12 to its full open position, so the fluid is supplied to the train pipe up to the pressure carried in the main reservoir, if desired.

7 It will now be apparent that by means of my improvement, the operator may at any time supply fluid to the train pipe' up to the full pressure carried in the main reservoir and that the device is simple and adapted to be readily applied to existing feed valve devices by simply changing the spring cap portion thereof.

Instead of the push button arrangement shown, a cockhaving an open and a closed position may be employed, said cock being connected to a port leading from the piston chamber 9, so that in open position the chamber is connected to the atmosphere to effect the operation of the abutment 10 and the valve 12.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a fluid pressure brake, the combination with a train pipe, of a feed valve device operated by a reduction in fluid pressure for maintaining a predetermined degree of pressure in the train pipe, of an auxiliary manually operated device for also reducing the fluid pressure on said feed valve device to supply fluid to the train pipe at a higher degree of pressure.

2. In a fluid pressure brake, the combination with a train pipe, of a feed valve device having an adjustable regulating mechanism for normally controlling the maximum degree of pressure of fluid admitted to the train pipe, of an auxiliary manually operated valve for venting fluid from said feed valve device to operate the same to supply fluid to the train pipe at a higher maximum degree of pressure.

3. In a fluid pressure brake, the combination with a source offluid under pressure, a train pipe, of a feed valve device adapted to supply fluid from said source tothetrain pipe at a maximum pressure less than the pressure of said source, a brake valve having a position forconnecting the feed valve device to the train pipe, said feed valve device beingprovided with an auxiliary manually operated valve'for ventingfluid from said feed valve device to operate the same to supply fluid to the train pipe at the max-. imum pressure of said source.

L 4:. In a fluid pressure brake, the combination with a source of fluid under pressure and a train pipe, of a feed valve device having a single regulating-"portion governed by train pipe pressure for normally supplying fluid from said source to the train pipe and an auxiliary manually operated means for also controlling .said feed valve device to supply fluid to the train pipe.

5. In a fluid pressure brake, the combination with a source of fluid under pressure and a train pipe, ofabrake valve, a feed valve device h'aving means operated by a reduction influid pressure for normally supplying fluid to the train pipe at a predetermined degree of pressure less than the maximum pressure of said source in the running position of the brake valve, and an auxiliary manually operated device for also reducing the pressure onsaid means to supply fluid to the train pipe at the full pressure of said source.

6. In a fluid pressure brake, the combination with a source of fluid under pressure and a train pipe, of a feed valve mechanism normally controlled by the degree of train pipe pressure for maintaining said train pipe pressure at a predetermined degree and an auxiliary manually operated device for also varying the operating pressure on said feed valve mechanism to thereby effect the operation of said mechanism to supply fluid to the train pipe at a higher degree of pressure.

7.'In a fluid pressure brake, the combination with a source of fluid under pressure and a train pipe, of afeed valve device comprising a valve for controlling the supply of fluid from said source of fluid under pressure to the train pipe, a movable abutment normally subject to opposing fluid pressures for actuating said valve, a diaphragm subject to the train pipe pressure, a valve operated by said diaphragm for venting fluid from one side of said movable abutment, and a manually operated valve for also venting fluid from said movable abutment.

8. In a fluid pressure brake, the combination With a source of fluid under pressure and a train pipe, of a feed valve device comprising a valve for controlling the supply of fluid from said source of fluid under pressure to the train pipe, a movable abutment normally subject to opposing fluid pressures for actuating said valve, a valve adapted to vent fluid from one side of said abutment, a diaphragm subject to the opposing pressures of an adjustable spring and the train pipe pressure for controlling said vent valve, and a manually operate valve means for also venting fluid from said movable abutment to operate the same.

9. In a fluid pressure brake, the combina- I tion with a source of fluid imder pressure and a train pipe, of a feed valve device push button for venting fluid from said feed a valve device to operate the same to supply air to the train pipe.

In testimony whereof I have hereunto set my hand.

WALTER V. TURNER. WVitnesses:

CHAS. A. ROWAN, A. M. CLEMENTS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents,

Washington, D. 0.