US1586005A - Automatic water valve - Google Patents

Description

May 25 1926. 1,586,005 a L. C. RISHEL AUTOMATI C WATER VALVE Filed 4L. 1923 4 'Hal.

l N VEN TOR By L u THE/i C. RISHEL Patented May 25, 1926.

UNITED STATES LUTHER C. RISI-IEL, OF LOS ANGELES, CALIFORNIA.

AUTOMATIC WATER VALVE.

Application filed January 4, 1923.

My. invention relates to automatic gas control devices employed in water heating systems for controlling the flow of gas to the burner in accordance with the flow of water through the system.

In automatic gas control devices of the character heretofore proposed, they have failed to operate successfully for any protracted period because of water leaking from the water valve through the gas valve and into the gas line, thus extinguishing the burner. This has been due, in the main, to faulty packing of the water valve, and the arrangement of the water valve with respect to the gas valve. Further, in such gas control devices, the connecting mechanism between the water valve and the gas valve has been such as to require a relatively high water pressure in order to actuate the valves so that they are incapable of success in systems having a relatively low water pres sure.

It is a purpose of my invention to provide an automatic gas control which positively prevents water entering the gas line, and which is sufficiently sensitive to insure of its proper operation at all times irrespective of the degree of water pressure.

Although I have herein shown and described only one form of gas control device embodying my invention, it is to be understood that various changes and modifications may be made herein without departing from the spirit of the invention and the spirit and scope of the appended claims.

In the accompanying drawings,

Figure l is a view showing in vertical section one form of gas control device embodying my invention,

Figure 2 is a plan view partly in section of the gas control device shown in Figure 1,

Figure 3 is a detail sectional view taken on the line 33 of Figure 1,

Figure 1 is a vertical sectional view taken on the line 4.t of Figure 1.

Referring specifically to the drawings in which similar reference characters refer to similar parts, my invention in its present embodiment comprises a casting which is constructed to permit of its being cast at a single operation, and this casting in the present instance comprises a water valve casing 15 and a gas valve casing 16, connected to the latter by means of an arm 17 The casing 15 is provided with a water inlet 18, as shown in Figure 2, and a water out- Serial No. 610,727.

let 19, as shown in Figure 1, a threaded nipple 2O threadedly engaging the casing 15 for the purpose of permitting the attaching of a pipe which conveys water to the usual heating coil. of a heating system of this character. As clearly shown in Figure 1, one end of the casing 15 is provided internally with a projection 21 constituting a seat for a water valve 22. The casing 15 is also formed eX- ternally with a projection 23, and these projections 21 and 23, as well as the casing 15, are bored toreceive a stem 24 of the valve 22. The projection 23 is threaded externally to receive a cap 25 for confining a packing 25 within the projection and to thereby effectively seal the stem 24 against leakage of water from the casing 15.

The valve 22 is beveled at one end as in dicated at 26, and this same end is recessed to accommodate a resilient washer 27 formed of rubber or other suitable material and arranged to engage the seat 21 when the valve is in closed position. This washer 27 cooperates with the packing 25 in prevent ing the passage of water through the bore for the stem 24. The beveled end 26 is designed to cooperate with the beveled annular portion 28 of the valve casing 15 so that when the valve is in open position as shown in Figure 2, the water admitted to the casing from the inlet 18 will be evenly discharged into the casing and outlet 19.

The gas valve casing 16 includes a gas inlet 29 and a gas outlet 30, the gas inlet communicating with the inlet chamber 31 and the gas outlet communicating with an outlet chamber 32. These two chambers 31 and 32 are formed by means of a partition 33 provided with a port 34 controlled by a gas valve 35. The valve 35 is secured to a head 36 by means of a screw 37 and the head 36 is in turn fixed to a stem 38 slidably mounted in a bearing 39. The head 36 has its sides concaved as indicated at 36 in Figure 3 for the purpose of allowing the free passage of gas through the port 34 when the valve 35 is in open position. The valve 35 is normally urged to closed position with respect to the port 34 by means of a spring 4:0 mm bracing the head of the screw 37 at its upper end and a projection 41 at its lower end. The projection 41 is formed on the inner side of a screw plug 42 fitted within the easing 16. The valve 35 is provided with an annular flange 35 which is adapted to cooperate with a similar flange 3 1 formed in the wall of the port 3d: in eileeting the clos ing of the port to prevent the passage of gas from the chamber 31 to the chamber 2L.

The stem 38 is provided at intervals with annular grooves 38 which are designed to receive vaseline or a similar scaling agent for preventing the leakage of gas through the bearing 39. The valve stems L land 38 are of sutlicient length to project from the casings 15 and 16, respectively, and for et- :l'eoting the automatic operation oi the gas valve upon actuation oi the water valve, the following mechanism is provided.

its clearly shown in Figure 1, a bell cranl: lever 43 is pivoted upon an ear formed on the casing 16, and th upper arm oi the lever 13 is bifurcated to receive the outer end of the valve stem 2-.t. A coiled expansible spring l5 interposed between the cap and the lever 43, and a nut is threadedly mounted upon the stem 2-1; for ellectino an adjustment of the lever l3 with respect to the stem 21!; as will understood. A washer l? is interposed between one end oi the spring 4:5 and the lever it as clearly shown in Figure l. The other arm of the lever engages the upper end ol? the stem 38, whereby it will be seen that movement of the lever it) through movement of the stem 2-1- will ell'ect movement oi the stem 38.

In operation, the water valve and the gas valve are normally urged to closed position under the action or the springs and 110. hen the pressure oi the water within the casing 15 is reduced lily dispensing water from the casing, the valv will respond to the pressure at the other side oi: the valve, thus moving to open position against the action oi the spring l5. ll ith the valve 2 in open position as shown in Figure 2, the lever 4-3 is rocked to depress the lower arm and thereby the stem 8st; against the tension of the spring ll) to open the valve l vith the valve 35 opened, it will be clear that the within the chamber 31 will be admitted to the outlet chamber 32 and ultimately to the burner oi the tein. It will be understood that the as valve 35 will he opened a distance corresponding to the opening in the water valve Leas es so that the supply of to the burner will he in accordance with the water discharged from the casing 15.

.lior the purpose of equalizing the pressure 01' water on the opposite sides of the valve 22, a duct 22 is formed in the valve 22 as clearly shown in Figure 1, and it will be understoodthat through the medium oil' this duct, the water at opposite sides of the valve will be of equal pressure when the valve is in closed position.

The pus ibility of the water entering the gas line through the bearing 39 is extremely remote. However, to positively prevent such an occurrence, that portion of the easing 16 adjacent the stem 38 is provided with. a raised portion 16 so that should any water accumulate on top of the casing 16, it cannot seep hetvvecn the stem 38 and the bear in. 39.

I claim as my invention:

l. A {2115 control device comprising); a water valve casing, a water valve within said casing, having a duct there-through ior equalizing the water pressure, a gas valve casing disposed at an angle with respect to the 'ater valve casing, a gas valve within the gas valve casing, stems extending :trom the casings and connected to the valves, a lever pivoted on one of the casinos and engaging one ot the stems, a spring interposed between one *asing ant said lever and surrramding the other stem, and a nut threaded on said stem and engaging the lever for the purpose described.

2. A as control device comprising a water valve casing, a water valve within said casing, a gas valve easing, a gas valve with; in the valve casingir. stems extending"from the casings and connected to the valves, a lever pivoted on one of the casings and engaging: one Of the stems, a spring interposed hetween one casing and said lever and surrounding the other stem, and a nut threaded onto said stern errgnuriup the lever -for the purpose described.

in testimony whereof l have signed my name to this specification.

LUTHER C. RISHEL.

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