US1032972A - Automatic cut-off valve for gas-stoves. - Google Patents

Description

J. S. VOLLMER.

AUTOMATIC GUT-OFP VALVE PoR GAS STOVBS.

APPLICATION FILED OCT. 26, 1911.

Patented July 16, 1912.

2 SHEETS-SHEET l.

WW1/Lewes CLUMBIA PLANOGRAPH C0.. WASHINGTON. l)4 C.

J.. S. VOLLMER.

AUTOMATIC GUT-OFF VALVE FOR GAS STOVES.

APPLICATION FILED 0011.26, 1911.

1,032,972. Patented July '16, 1912.

2 SHEETSTSHEET 2.

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JACOB S. VOLLE/IER, OF NEWARK, OHIO.

AUTOMATIC GUT-OFF VALVE FOR GAS-STOVES.

Specification of Letters Patent.

Patented July 16,1912.

Application filed October 26, 1911. Serial No. 656,945.

To all whom 'it may concern:

Be it known that I, JACOB S. VOLLMER, a citizen of the United States, residing at Newark, in the county of Licking and State of Ohio, have invented certain new and useful Improvements in Automatic Cut-Off Valves for Gas-Stoves; and I do declare the following to be a full, clear, and exact de- Iscription of the invention, such as will enable others skilled in the art to which it appertains to inalie and use the same.

rlhis invention relates to improvements in automatic cut off valves for gas stoves.

One object of the invention is to provide f an automatic cut off of this character having an improved construction and arrangement of valve adapted to be opened by the weight of a cooking utensil or other object placed on the burner of the stove and to be automatically closed when the object is removed from the burner, means being provided whereby suiiicient gas is permitted to flow through the burner to maintain a very small light whereby when the valve is opened full in the manner described, the larger volume of gas will be ignited.

Another object is to provide an improved construction and arrangement of valve opening lever having an adjustable valve engaging mechanism whereby the valve may be` opened to a. greater or less extent, thus regulating the size of the blaze.

`With these and other objects in view the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be more fully described and claimed.

ln the accompanying drawings: Figure 1 is a vertical sectional view through ya portion of a gas stove showing the application of the invention; Fig. 2 is a top plan view of the same; Fig. 3 is an enlarged vertical longitudinal sectional view through the valve of the attachment showing the valve in closed position; Fig. 4 is a similar view showing the valve in open is a cross sectional view on the line 5;-5 of Fig. 3; Fig. 6 is a detail perspective view of the valve removed from the casing; Fig. 7 is a similar view of the valve opening lever.

In the embodiment of the invention I provide a valve casing 1 which is preferably position Fig. 5-

in the form of a tube or cylinder having its bore at the upper end enlarged to form a recess 2 the purpose of which will vbe hereinafter described. The upper recessed end of the valve casing is exteriorly threaded and adapted to be screwed onto said end is a cap 8. 1n one side of the valve casing is formed a threaded passage 4which communicates with the recess 2 or enlarged bore of the casing near its inner end as shown. lVith said threaded passage is adapted to be engaged a branch gas supply pipe 5 the outer end of which is connected with the main gas supply pipe 6. In the pipe 5 isv arranged a cut off valve 7 whereby the vflow of gas from the main supply pipe tothe valve casing may be Acut off.' In the opposite side of the casing 1 near its lower end and communicating withvthe bore of said tube is a gas conducting tube 8 the outer end of which is engaged with the mixing chamber 9 and gas conducting tube 10 of the burner 11 which is arranged in suitable position beneath the body or frame 12 of the gas stove as shown. The burner 11 may be of any suitable construction and is here shown in the form of a tubular ring perforated in its upper side to formgas discharge openings.

y Slidably mounted in the casing 1 is a tubular or hollow cylindrical valve 13 the upper end of which is closed by a circular guide plate 14 secured to said end of the valve in any suitable manner. rlhe plate 14 has formed therein a small gas passage 15 the purpose of which will be hereinafter described. ln one side of the valve near its upper end is formed a gas inlet port 16, while near the lower end of the valve and in the opposite side thereof from the' port 16 is formed an elongated gas discharge port 17. The valve when arranged in the casing has its lower end forming its stem projecting a suitable distance beyond the lower end of the casing and when vit is desired to open the'valve it is necessary to force the valveupwardly in the casing until the guide plate 14 is above the discharge end of the pipe 5 as shown in Fig. 4 of the drawings, in which position the inlet port 16 of the valve will be brought into register with the inlet pipe 5 and the discharge port 17 of the valve will be brought into full register with the gas conducting tube 8 whereupon the gas may flow to the mixer 9 and the burner.

ln order to auton'latically open the valve, I preferably employ a bell crank lever 19 which is pivotally mounted intermediate ot its ends by a pivot screw 19I or other suitable means to one side ot' the gas conducting tube 10 oit the burner or to some other suitable support. The lever 19 has its inner end bent upwardly at a right angle and projected through the annular burner 11l The right angular projecting end of the lever 19 extends a suitable distance above the top of the stove and has arranged thereon a plate 2O with which the cooking utensil or other object is engaged when placed over the burner. The outer end of the lever is bent to bring said end beneath the stem ot the valve 13 and in said end ot the lever is formed a threaded opening Q1 through which is adapted to be screwed a valve operating screw 22 the upper end ol" which is adapted to ei'lgage the stem oitl the valve, said stem ot the valve being preferably enlarged to form an increased bearing surface for the screw. By thus constructing and arranging the lever 19 it will be seen that when a cooking utensil or other weight is placed on the stove over the burner and into engagementl with the plate 20, that the lever will be rocked thus causing' the screw 22 in the outer end thereof to litt or torce the valve upwardly in the casing until the ports 1G and 17 are brought opposite to the inlet and discharge ports of the casing as herein before described. By adjusting the screw 22 in the end ot the lever the stroke of the valve may be regulated to bring the discharge port 17 into more or less complete register with the inner end of the gas conducting tube S, thus controlling the flow of the gas through said pipe and to the burner.

Then the weight oi' the cooking utensil or other object is removed from the stove the valve is immediately brought to a closed position by means ot a coiled spring 23 arranged in the enlarged upper bore or recess 2 of the valve casing, said spring being compressed between the plate 14 and the cap 3 when the valve is opened so that when pressure on the lower end ot the valve is removed the expanding ot the spring will torce the valve to a closed position as clearly shown in Fig. ot' the drawing. Villien the valve has been thus brought t-o a closed position a small quantity ot' gas is still permitted to flow through the aperture 15 in the plate 14 through the discharge port 17 in the lower portion of the valve, said port having' the form of an inverted keyhole slot of sullicient length to permit the upper end thereot1 to register to a very limited extent with the inner end of the discharge tube as clearly shown in Fig. 3 ot the drawing. On the lower end otl the valve casing in which the lower end of the valve operates is preferably arranged a stutling box Zilwhereby any leakage ot the gas through this end of the casing is prevented.

From the foregoing description taken in connection with the accompanying drawings7 the construction and operation ot the invention will be readily understood without requiring a more extended explanation.

Various changes in the torni7 proportion and the minor details of construction may be resorted to without departing from the principle or sacricing any ot' the advantages of the invention as claimed.

Having thus described my invention what I claim is:

1. An automatic cut ott valve tor a gas stove comprising a burner, a valve casing provided in its opposite sides with an inlet gas supply pipe and an outlet gas pipe leading to the burner, a tubular valve slidable longitudinally in the casing and provided with an inlet port of substantially the capacity oit the inlet gas pipe and an elongated outlet port ot substantially t-he capacity, at one end, of the burner gas pipe and of very slight capacity at its opposite end, means tor normally maintaining the valve in position with the inlet port out ot register with the inlet gas pipe and the smaller end oi the outlet port in register with the burner gas pipev a plate covering the end of the valve and provided with a very small opening which always affords communication between the interior ot the casing and the interior of the valve, and means, brought into action by placing an article upon the stove over the burner for sliding the valve to bring the inlet port and the larger end of the outlet port into register with the respective pipes.

2. An automatic valve for a gas stove comprising a burner, a tubular valve casing having an enlarged bore in its upper portion, a gas supply pipe opening in said enlarged bore, a gas pipe leading to the burner trom the casing near its lower end, a valve provided with an inlet port in one side, and an outlet port in its opposite side having an upward extension forming a key hole slot, a plate on the upper' end of the valve having a very small opening ali'ording communication between the enlarged bore ot the casing and the interior of the valve7 a spring in the enlarged bore of the casing bearing upon the plate on top of the valve and nor* inally holding the inlet opening out of reg ister with the inlet gas pipe, and the upper end of the outlet opening in register with the burner gas pipe, and adjustable means, brought into action by placing an article upon the stove, over the burner, for moving my hand in presence of two subscribing Witthe valve upward against the force of the nesses. spring to carry the inlet port into register with the inlet gas pipe, and the enlarged JACOB S' VOLLMER' lower end of the outlet port into register lVitnesses: with the gos burner pipe. GEO. E. BECK,

In testimony whereof I have hereunto set C. H. SPENCER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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