US593594A - Valve - Google Patents

Description

2 SheetsSheet 2.

(No Model.)

M. MAREA 8v T. GONNORS. VALVE.

Patented Nov. 16,1897.

UNITED STATES PATENT Fries.

MICHAEL AREA AND THOMAS OONNORS, OF GARRETT, INDIANA.

VALVE.

SPECIFICATION forming part of Letters Patent lilo 593,594, dated November 16, 1897. Application fi led September 16, 1896. Serial No. 606,019. (No model.)

To all whom, it may concern.-

Be it known that we, MICHAEL MAREA and THOMAS CONNORS, citizens of the United States, residing at Garrett, in the county of De Kalb, State of Indiana, have invented certain new and useful Improvements in Valves, of which the following is a specification, reference beiughad therein to the accompanying drawings.

This invention relates to certain new and useful improvements in valves designed for water-raisin g systems for sleeping-car service and the like; and it has for its objects, among others, to provide a simple and cheap construction of valve designed for attachment to the car and for connection with the train-line or main train-pipe that supplies the air for the brakes on the train. lVhile it is designed primarily for this purpose, it will be seen that it is adapted for use in all places where a supply-valve is needed, where the pressure is supplied and the reduction is made, and the valve is designed to work automatically to hold the pressure that has already been accumulated in the reservoir, being normally held open, so as to admit the air from the service-pipe to the reservoir, but automatically closing when there is a reduction in the pressure in the supply-pipe, and thus retain in the reservoir the pressure that has been therein accumulated.

Other objects and advantages of the invention will hereinafter appear in the following description, and the novel features thereof will be more particularly pointed out in the appended claims.

The invention is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in Which Figure 1 is a substantially central vertical section through the valve on the line 1 1 of Fig. 2. Fig. 2 is a horizontal section on the line 2 2 of Fig. 1, looking down. Fig. 3 is a substantially central vertical section showing a slightly-difierent form; and Fig. 4 is a horizontal section on the line 4 4 of Fig. 3, looking down.

Like letters of reference indicate like parts throughout the several views.

Referring now to the details of the drawings by letter, A designates the valve casing or chamber, having a tubular extension A, through which the valve-stem works, and the upper end of which is guided in the bore 17 of the cap ]3, as seen in Fig. 1, or in the screwnut A in the form seen in Fig. 3. The tubular extension A has near its upper end alateral extensionor nipple A designed for attachrnent to or connection with the reservoir. (Not shown.)

O is the cap or head to the valve-casing and held thereto by suitable bolts 0, and between the inner face of this cap and the adjacent face of the body portion or casing is a gasket D, of leather, rubber, or other suitable material, and extending to the opening E in the cap, which communicates with the interior of the casing and =upon which the piston head or valve is designed to seat itself when the pressure thereon is removed by the reduction of the pressure of the air in the train-pipe and serves to make a seat for the said piston or valve, so as to form a better joint and hold or retain the air in the water tank or reservoir, as will be readily understood. The opening E is screw-threaded for connection with the main train-pipe or service-pipe of v the train.

F is the valve or piston, of any suitable material, preferably brass, provided with an annular groove f, in which is seated the packing-ring F, of any suitable or well-known form of construction. This piston-head or valve is mounted to reciprocate within the cylinder or valve-chamber, which is provided with a bushing G, fitted therein and provided near its upper end with a vertical passage g of a length slightly greater than the thickness of the piston-head or valve, as seen in Fig. 1. This valve or piston has a stem H, the upper portion of which is guided in the'capB or the adjlisting-screw A as the case may be, while upon the upper face of the piston or valve is a boss I, the edge or periphery of which is beveled upwardly, as seen ate, and in this edge are a plurality of grooves or channels J, as seen in both views, and which communicate with the space K between the upper face of the body portion of the valve or pistonhead and the under face of the top of'the valve chamber or cylinder, as seen in Fig. 1. The conical boss or beveled portion I upon the upper face of the piston or valve engages water tank or reservoir.

substantially as hereinbefore set forth theoperation is as follows, it being understood that the opening E is connected with the main train or service pipe and the nipple A with the water tank or reservoir: The air entering through the opening E, acting upon the under side of the piston or valve, forces the same upward, so that the passage 9 is disclosed or opened, andthe air passes through the same into the space K above the piston or valve and through the passages -J into the chamber M of the vertical extension of the valve chamber or cylinder, and thence through the opening in the nipple A into the Now should the air in the train-pipe be cut 0% or should there be a reduction in such pressure the valve will fall, so as to close the passage g, and thus prevent escape of the air that has already been accumulated in the tank. As soon as normal pressure is again resumed in the main train-pipe or service-pipe the valve is forced upward and the air passes, as indicated by arrow, through the passage g into the space K and through the groove J into the chamber M and out through the passage in the nipple A? to the reservoir. It will thus be seen that the device is automatic in its action, requiring no attention on the part of the attendant,

and that sufficient pressure is at all times maintained within the water tank or reservoir.

In Figs. 3 and 4 we have shown another form of the invention in which the piston is designed to be near thebottom at all times,

the bushing G being provided with the passages g, as before, but which are disposed between the upper and lower edges thereof and extending for the greater portion of the height instead of being disposed near the top,

as in the form shown in Fig. 1,and the grooves J in the piston being omitted. The upper end of the piston-stem H is guided in the bore 1) of an adj usting-screw A having an annular shoulder a against which the end of the spring N is received, and this adjusting screw or plug is screw-threaded and engages internal threads on the upper portion of the extension A of the valve-casing. Its upper end is polygonal or otherwise formed, as shown at a ,'to receive a wrench or other tool by which it may be adjusted, and the cap A is 6o form illustrated in Figs. 1 and 2, except that the valve normally remains at the bottom and the air passes through the vertical passages g around the piston and operates in substantially the same manner as the form hereinbefore explained.

Modifications in detail may be. resorted to without departing from the spirit of the invention or sacrificing any of its advantages.

In both Figs. 1 and 3 we have shown a spring N arranged around the valve-stem or the rod in the piston-head, and whichv serves to aid the piston or valve in moving to its seat upon the reduction of pressure in the main trainpipe. The adj usting-screw and form of cap illustrated in Fig. 3 may be employed in connection with the form of apparatusillustrated in Fig.1 in lieu of the form of cap therein shown, if desired.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. The combination with the valve-chamber having a bushing with vertical groove, of a valve mounted to move in said chamber and having a stem, and a central boss, a cap on the upper end of the chamber, and a spring around the stem of the valve acting upon the upper face of the latter; all substantially as herein shown and described.

2. The combination with the valve-chamber and a bushing having vertical passages, of a piston mounted to move within the bushing, and a spring acting upon said piston and means for regulating the tension of said spring; substantially as described.

3. The combination with the valve-chamber and a bushing having vertical passages with a piston mounted to reciprocate therein, a cap, an adj usting-screw having a bore to guide the upper end of the piston-stern, and a spring between said adj listing-screw and the piston; substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

' MICHAEL MAREA.

THOMAS CONNORS. IVitnesses:

J. WILLI M BEEHLER, WILLIAM H. Moss.

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