US1488981A - Automatic valve for gaseous burners - Google Patents

Description

, April 1 1924.

A. F. FRENTSOS AUTOMATIC VALVE FOR GAS EOUS BURNERS Filed July 28 1923 gwucnlot 7f Treats as Patented Apr. 1, 1924.

UNITED STATES PATENT GFFICE.

ATHAN F. FRENTSOS, OF DELAWARE, OHIO.

AUTOMATIC VALVE FOR GASEOUS BURNERS.

To all whom it may n0em:.

Be it known that I, ATHAN F. F mnvrsos, a citizen of the United States, residing at Delaware, in the county of Delaware and State of Ohio, have invented new and-useful Improvements in Automatic Valves for Gaseous Burners, of which'the following is a specification. a

This invention relates to valve devices used in conjunction with stoves having gaseous or liquid fuel burners, and has for its vobject the .provision of a novel control valve for automatically turning 011 the fuel supply when a .utensil or the like is placed over the burner, the arrangement being such that a small pilot light will remain burning even though the utensil be removed.

It is well known that in many places, such as short-order lunch rooms, restaurants, cafes, hotel kitchens, and the like, it is highly desirable that a stove be ready for instant use without it being necessary for the cook or chef to search for a match or other igniter to effect lighting. It is also apparent that to leave the burner or burners going at all times would involve a needless waste of fuel. It is with these facts in view that I have designed the present control device which automatically turns on the fuel to its maximum extent when the use of the stove is desired but which cuts down the flame to the minimum degree when the stove is idle.

Another object is the provision of an automatic valve of this character which may be used in conjunction with or built to form a part of the usual control cock, such ordinary cock being provided for the purpose of cutting off the flow entirely when such is desired. v I

An additional object is the provision of a device of this character which will be simple and inexpensive in manufacture, easy to install in already existing stoves, positive in action, efficient and durable in service, and a general improvement in the art.

With the above and other objects and advantages in view, the invention consists in the combination and arrangement of the several parts to be hereinafter more fully described and claimed and illustrated in the accompanying drawings in which:

Figure 1. is a top plan view of a stove equipped with my device.

Figure 2 is a longitudinal section therethrough showing a side elevation of my attachment.

Figure 3 is a detail section on the line 33 of Figure 2. 1

Figure at is a detail longitudinal section through the valve structure alone.

7 Referring more particularly to the drawings, the letter A designates a gas stove of the single burner type, the particular variety being what is commonly called a hot plate. This-stove includes the usual frame supported at its corners upon legs B and provided with any suitable means for supporting the grid or utensil support C beneath which is mounted the burner 1). Ordinarily the burner is of a ring-like formation, as shown, and leading thereto is a fuel conduit E which extends from a mixing device F where air is mixed with the gaseous or vaporized fuel, depending upon whether the stove be of the gas, gasoline, or vaporized oil type. In connection with such stoves it is a common practice to provide a cut-ofi cock G having a nipple H for attachment of the usual flexible hose thereto.

formed with opposite extensions 11 and 12,

the former of which is externally threaded for screwing engagement within the mixer and the latter of which is formed with a threaded recess 13 for receiving the threaded end of the cock. G for making the necessary connection. This valve body further includes a depending extension 1 formed with a bore 15 which intersects a passage 16 in the head, which passage is designed to establish communication between the cut-off cock and the mixer. The lower end of the extension 14 is counter-bored, as shown at 17, and is externally threaded for engagement thereon of a cap 18 formed with a'central hole 19. Slidably mounted within the bore is a stem formed intermediate its ends with a peripheral flange 21 located within the counter-bore 17 and bearing against the lower end of a coil spring 22 which bears against the shoulder 23 formed 'at the juncture of the bore 15 with the counter-bore 17. The normal position of this valve'stem 20 is such that its upper extremity is slightly below the uppermost point of the passage 16 so that a very small flow of gas or vapor through this passage is permitted. At a point spaced from its upper extremity, the stem 20 is cut away, as shown at 24:, so that when the stem is moved upwardly this cut-away portion will register with the endportions of the passage 16 and permit an unobstructed flow of fuel therethrough.

In connection with this valve I provide operating means which includes or consists of an angularly shaped lever 25 which is pivoted intermediate its ends upon a screw 26 which passes through a pair of mating clamps 27 engaged upon the conduit E at its juncture withthe mixer F, these clamps be ing held together at their other ends by a bolt, screw or other equivalent fastening device 28. In the present instance I have shown the lever 25 as looped or bent to define an eye through which the bolt 26 passes though it should be understood that such a construction is not necessary as the lever might be formed and pivoted in a different manner. This lever includes an upstanding or vertical portion 29 which extends through the center of the ring-like burner D and which terminates in a head 30 located above the top of the grid 0 so as to be engaged and depressed by any kettle or other utensil placed upon the stove. The other end of the lever is formed with an upturned extension 31 which abuts against the lower end of the stem 20.

It is to be noted that the cap 18 is screwed onto the body 14 and that by adjusting this cap the closed position of the control valve or stem may be varied for regulating the pilot flow of fuel through the valve device, it being obvious that by unscrewing this cap, the stem will be permitted to move downwardly into less obstructing relation to the passage 16 so that a greater flow may be had.

In the operation it will be seen that if the cock G be open, the normal position of the valve is as shown in Figure 1, the stem 20 being in its lowermost position maintained by the action of the spring 22. A very slight amount of fuel will flow through the passage 16 so that a pilot light will be provided at the burner, rendering the burner ready for instant use. lVhen any utensil is placed upon the stove, engagement there of against the head 30 will rock the lever 25 upon its pivot bolt 26 so that the upturned extension 31 abutting against the valve stem 20 will raise the latter so as to bring the cut-away portion 2 1 in alinement with the passage 16 so that the full flow, or as full a flow as is permitted by the position of the cock G, will be supplied to the burner.

From the foregoing description and a study of the drawings, it will be apparent that I have thus provided a simple, inexpensive and easily installed valve for gas or vapor stoves which will be absolutely automatic in operation and which will keep the stove ready for instant use without involving an extravagant and wasteful consumption of fuel.

Another feature of advantage to be observed is that the valve ofthe present device acts as a mixer or fuel jet. In many stoves, especially that type utilizing oil, gasoline, or other liquid fuel, it is customary and necessary to provide a species of mixer or jet like device which is interposed between the cut off and the air mixer. It is well known that such devicesinvolve considerable expense in their manufacture and installation. lVith the present valve it is to be observed that the outlet hole is very small so that it really acts as an expanding jet for the fuel which will permit elimination of the jet or mixer device ordinarily provided and this naturally operates to cut down the cost of production of the stove.

While I have shown and described the preferred embodiment of the invention it is of course to be understood that I reserve the right to make such changes in the form, construction and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claim.

I claim:

In a stove having a gaseous fuel burner, utensil operated means for controlling flow of fuel to the burner, including a pivoted lever having one end positioned to be engaged by a utensil placed upon the burner, and a valve comprising a T-shaped body member formed with a passage extending through two opposite branches of the body and having one branch connected with the burner and the other branch adapted for connection with a cut off valve in the supply conduit, said body having its remaining branch formed with a bore intersecting said passage and extending beyond both sides thereof, the last named branch having a counterbore leading into said bore, accap detachablyengaged upon said last named branch,a stem slidable within said bore and formed with an outstanding flange operating within the counterbore, the stem being slidable through the cap and projecting outwardly therebeyond and in engagement with said lever, a spring within said counterbore engaging said flange and the shoulder defined by the juncture of the bore and counterbore for normally holding the stem at the out- Ward limit of its movement with its inner 5 end substantially obstructing communication through said passage, the stem having a cut away portion adapted to register with the passage upon depression of the lever, the cap being screwed in place and adjustable for varying the normal closed position of the stem to regulate the pilot flow of fuel.

In testimony whereof I afiix my signature.

ATHAN F. FRENTSOS.

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