US1676169A - Pressure-retaining valve - Google Patents

Description

July 3, 1928. 1,676,169

C. TRANSUE PRESSURE RETAINING VALVE F iled. Jan. 5, 1927 4/ V I J/ w 6- l a I 7 L/M. I

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7 Inventor /8 7 .By Attorney Patented July- 3, 192 v UNITED TATES rREssuRE-RETAINI'NG v'Anvn;

Application filed. January 5,1927; Serial K051159447.

This invention relates to an improved pressure retaining valve such as isused upon railway conveyances in association with air brake systems of conventional form.

a The pressure retaining valve, as is well known to those familiar with devices of this kind, is used on grades when it necessary to hold the brakes applied, while recharging auxiliary reservoirs'or to hold the slack of the train when approaching points, where V stopsare about'to-be made. i

For the convenience of trainmen, this valve is placed on the end of the carnear the brake wheel. It is connected by a small pipe with the exhaust port of the triple valve through whichthe air is exhausted from the brake cylinder when the brakesare released.

The present retaining valves for this pur pose are provided with manually rotated valve plugs and require the trainmen to go 7 from end to end of the train to see that the valves are in proper position according to the circumstances. Obviously this is inconvenient and sometimes is not altogether su'ccessful because careless traln men at tnnes either open the valve too much or too little.

\Vhat I propose to do,' is to substitute a novel pressure retaining valve which includes the usual manually controlled means but in addition, is provided with an automatic spring open valve which may, under the action of a pressure from the system; be caused to close by the engineer in the cab.

vantage of this improved arrangement will become apparent fro1n the following description and drawings. p

In the accompanying drawings forming a part of this application, and in which like numerals are employed to designate like parts throughout the same Figure 1 is a side elevatlon of a retaining valve constructed in accordance with the the present invention; 7 i Fig. 2 is a central vertical section through the same.

Fig. 3 is a fragmentary sectional view in section and elevation showing the rotary plug valve, and Fig. 4 is a horizontal sectional view of portions shown in elevation, showing the relation of the two separate valves.

Referring to the drawings 1n detail, it

will be seen that the valve as an entirety, is

designated bythe' reference character 1, the

The structural details and features of adallows the air to bleed out slowly. U a

By moving the handle to verticalpoisiti on same being composed of upper and lower half sections 2 and 3 respectively; The

lower section {iris formed with a screw threaded neck 4 at its upper end and-also with a-cylindrical socket 5 at this end; Then too, 'it is formed with an internally screw I threaded reduced conection 6' at its bottom with which the pipe 7, from in the cab, is connected."

The pipe communicates with the socket an air control thruthe mediumof the-b'ore8 Connected i to the screw threaded part djisthe upper half section 2 w hich is formed with an air passage 9 connected w th a.reduced air portlO inthe topoft-hispart2; This port is connected with the triple valve by means which is not shown.

The upperend of the part isreduced and formed with a wrench engaging portion 11. Arranged in the socket 5 is-a cylindrical pressure operated valve 12 having a reduced extension 13 at its top extending into thepassagei). A coiledlvalve opening spring ltsurrounds this extension and bears 'uponthepart 12.

Formed on one side of the passage 9 is a bypass 15 communicating with an air escape port 16 in the rotary plug valve 17, carried ativelysmall ports 18 are connected with the port 16 and serve to slowly bleed the air in a well known manner; As is usual, this valve 17" is formed with a handle 19 by means ofwhich it is moved to the various pos1t1ons; Moreover, the body is formed on .by'the upper half'section of the body. Relone side with an opening 20 with which the ports in the rotary plug valve are adapted When the handle 19 is ina' I substantially horizontal position,- the small to register.

port lS registers Withthisopening 20 and hOwever, the la g P 0 comes flit) play to operation of the manually actuated valve is the additional spring openedbut' pressure closed sliding valve'12 carrying the reduced stem .13 having the pointed end cooperating I with the valve seat formed at the juncture of the air passages 9 and 10.

. In practice, a pipenot shown isconnected with the port 10 and with the usual retaining valve port in the triple valve. Then permit the air to discharge freely. The

9 f well known and need 'notbe extensively ex- 5 plained here. ,The improvement, however; as I have before stated isthe provision of.

the pipe 7 is extended to a pipe in "the respective car and all ofthe individual car pipes are coupled together and in turn connected with a control valve in the engineers cab. These piPQS Serve to. convey pressure from the systein and at his discretion, the

:agaln. 1

No doubt, by considering the description 111 connection with the drawings, persons familiar with devices of thisflclass will be able to obtain a clear understanding of the same, Therefore, a more lengthy description is thought unnecessary.

Minor changes coming within the field of invention claimed may beresorted to, if desired.

Having thus. described my invention, what I claim as; new is;:-.

described comprising a body composed ofupper. and lower detachably connected sectionsnformed with a passage extending entirely' therethrough, a reciprocatory valve located in said passage for closing one end of the passage, a spring for normally moving said valve to one position, the valve being adapted to be moved to its other position under the action of the. air pressure, and a rotary ported manually actuated valve carried said body and cooperative with said air passage.

2. A pressure retainingvalve of the class described comprising a body formed with an air passage, spring opened pressure closed valve in said passage, a pressure supply pipe connected with one end of the passage, the open end of the passage being adapted to accommodate a triple valve pipe, and a manually actuated valve moiuitedin said body and in, communication with said. pas

sage. I

In testimony whereof I} affix my signature. HA TRA UE.

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