US1207135A - Automatic gas-valve. - Google Patents

Description

8.1. CHISM.

AUTOMATIC GAS VALVE.

APPLICATION FILED MAY3.196

1,207,135. Patented Dec. 5,1916.

UNITED STATES PATENT OFFICE.

SYLVESTER J. CHISM, 0F KRUM, TEXAS, ASSIGNOR OF ONE-HALF TO LAWSON M. HAYES,

OF SLIDELL, TEXAS.

AUTOMATIC GAS-VALVE.

Application filed May 3, 1916.

To all whom it may concern:

Be it known that I, SYLVESTER J. CHIsM, a citizen of the United States of America, residing at Krum, in the county of Denton and State of Texas, have invented certain new and useful Improvements in Automatic Gas-Valves, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to an automatic gas valve, and has for its object the production of a simple and eflicient valve which will automatically close should the pressure of the gas fall below a predetermined point.

Another object of this invention is the production of a simple and efficient means for holding the valve open while the pressure of the gas remains at a certain point and allowing the same to automatically close and prevent the further passage of gas'through the valve into the meter after the same has fallen below a predetermined point.

With these and other objects in view this invention consists of certain novel combinations, constructions, and arrangements of parts as will be hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a vertical longitudinal section through the valve showing the same in a closed position. Fig. 2 is a longitudinal section through the valve showing the same in an open position. Fig. 3 is a vertical transverse section taken on line 33, of Fig. 2. Fig. 4 is a section taken on line 44, of Fig. 2. Fig. 5 is a side elevation of thesliding valve which is adapted to automatically cut off the flow of gas through the casing.

By referring to the drawings it will be seen that 1 designates the valve casing which is provided with an entrance end 2 and a discharge end 3. The entrance end 2 is adapted to be connected to the supply line and the discharge end 3 is adapted to be connected to the meter. The casing 1 is provided with a depending section or housing 4, which housing 4 is provided with a threaded cap 5 for closing the lower end of the housing 4. This cap 5 is provided with an annular flange 6 upon the inner face thereof which is adapted to firmly engage the inner face of the housing 4 and also constitute a seat for the pressure control valve 7.

The pressure control Valve 7 comprises an Specification of Letters Patent.

Patented Dec. 5, 1916.

Serial No. 95,178.

upper section having a reduced end S which is externally threaded, upon which externally threaded end is threaded a closure cap 5. A washer or sealing ring 10 is firmly held between the inner end of the cap 5 and the shoulder 11 formed upon the lower end of the upper section of the control valve.

A pin 12' is carried by the control valve 7 and is connected to a vertically extending rod 13, which vertically extending rod 13 is in turn pivotally connected to the spring bar 14. This spring bar 14 is connected to the top of thecasing 1 by means of the rivets 15 as illustrated clearly in Fig. 2. A coil spring 16 is mounted within the cap 5 and is adapted to normally urge the valve 7 in an upward direction. An air escape aperture 9 is formed in the cap 5 so as to permit the escape of air as the valve 7 is moved down within the housing or casing 4.

A cut-ofl valve 17 is slidably mounted within the casing 1 and comprises a cylindrical body having a plurality of radiating guiding shoes 18 formed upon the outer periphery thereof. These guiding shoes 18 are adapted to travel upon the inner face of the casing 1 as illustrated in Fig. 2 of the drawing. A valve seat 19 is formed within the casing 1 and is adapted to receive the beveled face 20 of the valve 17 to constitute an efficient closure to prevent the pan sage of gas through the casing 1 while the valve 17 is in a closed position.

A shaft 21 is ournaled near the discharge end 3 of the casing 1 and has one end journaled in the bearing cap 22 as illustrated in Fig. 3 of the drawings, and the outer end of this shaft 21 passes through a bushing 23 for constituting an efiicient seal for preventing the escapement of gas around the shaft 21.

An arm 24 is fitted over the squared end. 25 of the shaft 21 and is firmly held in engagement therewith by means of the nut 26. A weight 27 is slidably mounted upon the arm 24 and is held in an adjusted position upon the arm 24 by means of a set screw 28. The shaft 21 is provided with a projecting finger 29, which projecting finger 29 engages a link 30, which link is also pivotally secured to the cars 31 of the sliding valve 17. A catch finger 32 is carried by the inner end of the valve 17 and is provided with an upwardly extending lip 33 for engaging the depending lip 34 of the spring arm 14. The operation of the device is as follows: The

arm 24; is swung to the position as shown in Figs. 1 and 2 so as to place the arm 32 of the valve 17 in a position to be engaged by the arm 1%. The pressure of the gas, of course, will remain at suflicient strength to keep the valve 7 at its proper position and retain the valve 17 in the position shown in Fig. 2. Should the gas fall below a predetermined pressure, the spring 16 together with the arm 14 will cause the arm let to be released from the arm 32 of the valve 17, and the weight 27 upon the arm 24 will cause the arm 2% to swing downwardly thereby drawing the'valve 17 securely upon its seat and prevent the further passage of gas through the casing 1. Should it, however, be desired to again open the supply, the arm 24 may again be swung to the position shown in Fig. 2, and providing the pressure is sufficiently great, the valve will be automatically retained in anopen position until the pressure should again fall.

It should be understood that the present device is especially advantageous for use in connection with gas stoves or lights which it is desirous of leaving burning, for should the pressure of the gas fail to fall below a predetermined point, the valve will automatically close and prevent the escape of gas should the flames become extinguished due to the falling of the pressure of the gas.

Having thus described the invention what is claimed as new, is

1. A gas valve of the class described comprising a casing, said casing provided with a reduced valve seat, a valve slidably mounted within said casing comprising a substan tially circular body having laterally extending shoe portions adapted to slide upon the inner face of said casing and at the same time permit the passage of gas around said valve, said valve provided with a tapering forward end, said Valve seat provided with a tapering portion upon which said tapering end of said valve is adapted to closely seat,

Copies of this patent may be obtained for five cents each, by addressing means for holding said valve in an open position, a weighted arm, a link connected to said arm and to the forward end of said valve at the central portion thereof and adapted to pull said valve forwardly into close engagement with said valve seat when the pressure of gas within said casing falls below a pre-determined pressure.

2. A gas valve of the class described comprising a casing, a valve seat, a valve member provided with radiating shoes upon the periphery thereof, said radiating shoes adapted to slide upon the inner face of said casing for directing said valve upon said valve seat, means engaging said valve for holding said Valve in an open position and being controlled by the pressure of the gas passing through said casing, a weighted arm carried by said casing, a link connected to said weighted arm and to the central forward portion of said valve for exerting a direct forward pull upon said valve when said valve is released and the pressure within said casing falls below a predetermined point.

3. A gas controlled mechanism of the class described comprising a casing, a valve seat carried within said casing, a valve slidably mounted within said casing, said valve provided with a rearwardly extending arm, a spring arm engaging said rearwardly extending arm of said valve, said casing provided with a depending portion, a cap threaded upon said depending portion, a plunger working in said depending portion and engaging said spring arm, means for yieldingly urging said plunger upwardly and causing said spring arm to engage said arm carried by said valve, and means cooperating with said valve for automatically bringing said valve to a closed position when said spring arm is released therefrom.

In testimony whereof I hereunto afliX my signature.

SYLVESTER J. OHISM.

the Commissioner of Patents,

Washington, D. C.

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