US917895A - Valve. - Google Patents

Description

F. T. REID.

VALVE.

APPLICATION FILED SEPT. 21,1908. Patgnted Apr 2 SHEETS-SHEET 1.

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F. T. REID.

I VALVE. APPLIUATION FILED SEPT. 21,1908.

Patented Apr. 13, 1909. 2 SHEETS-SHEET 2.

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FRANK T. REID, OF OLATHE, KANSAS.

VALVE To all whom it may concern:

Be it known that I, FRANK '1. Earn, a citizen of the United States, residing at Olathe, in the county of Johnson and State of Kansas, have invented certain new and useful Improvements in Valves, of which the following is a specification.

My invention relates to improvements in valves, and is an improvement over the valve for which I obtained Letters-Patent March 24, 1908, No. 882,798.

My present object is to provide a valve which may be employed for a great many different purposes, and with this end in view I make a number of the parts interchangeable so that the valve may be arranged to perform its diiterent functions in the most approved manner.

Specification of Letters Patent.

Application filed September 21, 1908.

Referring now to the accompanying draw- 1 ings, which illustrate the invention: Figure 1 represents a vertical section of my improved valve, with a chamber and piston forming a part thereof, arranged in an invertedposition. Fig. 2 is an end view of the same. Fig. 3 is a vertical section of the valve with the chamher and the piston thereof in their uppermost position. Fig. 4 is a vertical cross section of the valve. Figs. 5 and 6 are vertical sections of the valve with its chamber and piston in their uppermost positions. Fig. 7 shows the valve applied to a steam-pump.

In carrying outthe invention I employ a casing 1, preferably, of the globe-valve type and having oppositely-disposed internallythreaded ends 2, whereby it may be connected to a service-pipe 2 Said casing also has two oppositely-disposed internally-threadsd projections 3, arranged at right angles to ends 2. Projections 3 have openings of equal diameter for the reception of a cap a and the reduced threaded end of a chamber 5, which are interchangeable, so that when desired cap 4 may be applied to the lower projection of the casing, and chamber 5 applied to the upper projection thereof, as shown in Fig. 3.

Casing 1 is divided into a chamber 6 and a chamber 6 by a partition 6 having two openings whereby communication is established between chambers 5, 6, and 6 Said openings are surrounded by conical seats 7 adapted to receive the conical portions 8 of a balanced plug 9 adapted to close the valve against the passage of fluid therethrough. Plug 9 is provided with a stem 9 which extends through cap 4 and a stuffing-box 10,

Patented April 18, 1909.

Serial No. 454.5105.

which latter removably engages the reduced threaded end of said cap.

11 designates a lever pivotally secured to the outer end of stem 9 and provided with an adjustable counterweight 12, having a setscrew 13 so that it may be reliably set at any desired point upon the lever. Lever 11 is pivotally connected at its enlarged end to stem 9 and lulcrumed upon an arm 14 projecting from a yoke 15 secured to the reduced portion of cap 4 by the stuffing-box 10. The enlarged end of chamber 5 is closed by a cap 16, so that access may be had to a piston 17 secured to one end of stem 9*, and reciprocably mounted in said chamber. Cap 16 is provided with an air-cock 18, which provides an entrance and escape to chamber 5 for air, so that piston. 17 may move freely in said oh amb er.

In Figs. 1 and 2, I have shown the invention arranged for use as a pressure-reducing valve to be employed, for instance, in low pressure heating systems, service pipes of gas distributing plants, etc., where it is desired to maintain a certain pressure. '5 he valve is held in an open position by lever 11 and counterweight 12 until the fluid passing through the valve in the direction of arrow (t attains abnormal pressure in chamber 6 and acts with sui'licient force on piston 17 to lift lever 11 and its counterweight and force piston 17 downward and partly or entirely close the valve. When the pressure oi the fluid falls below normal, the plug and the piston are automatically raised by the lever and its counterweight, and maintained in a raised position until the pressure again goes above normal.

In Fig. 3, I have shown the valve arranged for controlling the flow of gas to a furnace. In this instance the valve-stein 9 and lever 11 are connected to the lower end of plug 9, and chamber and piston 17 are arranged at the upper end of the valve, so that when the gas flows through the valve in the direction of arrow 1), a portion of it will pass upward into chamber 5, raise the piston and thereby open the valve and allow the gas to how therethrough. The pressure is controlled by a cable 19, which extends around a sheave 20, and has one end secured to lever 11 while its other end leads to an upper room or other distant point, so that the valve may be entirely or partly closed by properly manipulating said cable. Weight 12 is dispensed with as the weight of piston 17 and the parts supported thereby is suflicient to close the valve should the pressure be temporarily interrupted. A vent 21 leading from chamber 5 to pipe 2 permits piston 17 to work freely in the chamber without creating a vacuum therein, and also prevents any gas which may leak around the piston from escaping into the atmosphere.

Fig. 4 shows the arrangement of the valve when employed as an automatic stop-valve for controlling light pressures. Stem 9 extends through cap 16, and provides means for opening or lifting the plug. Should the pressure be temporarily interrupted, piston 17 will drop and close the valve, which will remain closed until opened by hand.

The device may also be readily converted into an automatic stop-valve for high-pressure heating systems, &c., by arranging it in the manner shown in Fig. 5. W hen the valve is opened by hand, a )ortion of the fluid entering therein in the irection of arrow 0, will flow into chamber 5, and actin on piston 17, will hold the valve open, ut should the pressure be interrupted or suddenly reduced from any cause, such as the bursting of pipe 2 on the outlet side of the valve, the piston 17, assisted by the weight 12, will drop and close the valve and thus effectually cut off the supply of fluid until the valve is again opened by hand.

In Figs. 6 and 7 I have shown the valve arranged for automatically supplying steam to a pump, shown in Fig. 7, and consisting of the ordinary steam cylinder A, provided with a steam supply-pipe B, and a pump cylinder C, provided with the customary discharge pipe D. By connecting the valve to the steam supply pipe B, and the vent pipe 21 to the discharge pipe D, the operation will be substantially as follows: The steam in passing through the valve in the direction of arrow 01 will press upward against piston 17 and raise" the same against the action of lever 11,

and its counterweight 12, and thus hold the valve open while the pressure on the pump is normal, but should the pressure on the pump become excessive, it will act through pipe 21 upon the upper surface of piston 17 and assisted by the weight thereof, together with the weight of the lever 11 and its counterweight 12, will force said piston downward and entirely or partly close the valve until the pressure in discharge pipe D falls below normal, when the valve will again be opened by the steam acting on the underside of the piston.

Having thus described my invention, what I claim is 1. A valve consisting of a casing having a threaded upper and a threaded lower projection, a partition dividing said easing into two chambers having communication with each other through ports in said partition, a chamber communicatin g with the ab ove-mentioned tioned chambers and provided with a thread- 1 ed wall adapted to engage either the upper or lower threaded projection of the casing, a cap which is interchangeable with the last-mentioned chamber, a piston reciprocably ar ranged in the last-mentioned chamber, a valve plug connected to said piston, a stem connected to said valve plug, and a lever pivotally connected to said stem and fulcrumed to a stationary portion of the valve.

3. A valve consisting of a casing having a threaded upper and a threaded lower projection, a partition dividing said easing into two chambers having communication with each other through ports in said partition, a chamber communicating with the above men tioned chambers and provided with a threaded wall adapted to engage either the upper or lower threaded projection of the casing, a cap which is interchangeable with the last-mentioned chamber, a piston reciprocably arranged in the last-mentioned chamber, a valve plug connected to said piston, a pipe communicating with the valve, and a vent communicating with the last mentioned chamber and said pipe.

4. A valve consisting of a casing having a threaded upper and a threaded lower projection, a partition dividing said casing into two chambers having communication with each other through ports in said partition, a chamber communicating with the above-mentioned chambers and provided with a threaded wall adapted to engage either the upper or lower threaded projection of the casing, a cap which is interchangeable with the last-mentioned chamber, a piston reciprocably arranged in the last-mentioned chamber, a valve plug connected to said piston, a stem adapted to engage either end of the valve plug, a lever pivotally connected to said stem, a counterweight adjustably mounted upon said lever, an arm upon which said lever is fulcrumed, and a yoke secured to the valve for supporting said arm.

In testimony whereof I afliX my signature, in the presence of two witnesses.

F. G. FIsoHER, M. Cox.

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