US2534474A - Safety gas burner - Google Patents

Description

Dec. 19, 1950 J, PELLERIN 2,534,474

SAFETY GAS BURNER Filed Dec. 16, 1947 llzzlentor Lionel J. Feller/"n Patented Dec. 19, 1950 UNITED STATES PATENT OFFICE SAFETY GAS BURNER Lionel J Pellerin, Lynn, Mass.

Application December 16, 1947, Serial No. 791,995

4 Claims. 1

This invention relates to new and useful improvements in gas burners and the primary objeot of the present invention is to provide a gas burner including novel and improved means for automatically preventing the supply of fuel to a burner should liquid in a cooling utensil boil over to extinguish the burner flame.

Another important object of the present invention is to provide a gas burner including novel and improved means so designed as to prevent gas being emitted from the same should the supply valves be accidentally actuated when the pilot light is in an off position.

A further object of the present invention is to provide a safety gas burner the parts of which are quickly and readily assembled or disassembled facilitating the convenient inspection or repair of parts.

A still further aim of the present invention is the provision of a gas burner that is simple and practical in construction, strong and reliable in use. small and compact in structure, relatively inexpensive to manufacture, and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a side elevation view of the present burner with parts broken away and shown in section, and showing the valve in a closed positlon;

Figure 2 is a fragmentary vertical sectional view of Figure 1, and showing th valve actuated to an open position;

Figure 3 is a side elevational view of the burner in slightly modified form, and with parts broken away and shown in section, and showing the valve in a normal position;

Figure 4 is a top plan view of Figure 3; and

Figure 5 is an enlarged sectional view taken substantially on the plane of section line 55 of Figure 1.

Referring now to the drawings in detail, wherein for the purpose of illustration, there is disclosed a preferred embodiment of the present invention, the numeral I0 represents a main gas pipe having a pilot tube 12 and an outlet or supply conduit l4. Removably secured to the conduit I4 is a preferably annular burner I6 having perforations I8 and a central opening 20.

Secured to the upper face of the burner I6 by 2 fasteners or the like 22, is the flanged portion 24 of a hollow substantially frustro-conical support 26 having opposed openings '28 that align the discharge end or tip 30 of a pilot tube I2.

Slidably mounted in opening 32 provided in a central annular ring 34 positioned in the opening 20, is a valve stem 36 supporting a substantially conical valve 38 that is normally seated in the discharge opening 49 of the conduit 44. Loosely embracing the stem 36 is a sleeve 42 that is fixedly secured to a further sleeve 44 havin a suitable aperture that slidably receives the stem 36. The longitudinal axis of sleeve 44 is disposed at right angles to the longitudinal axis of sleeve 42. Adiusta'bly mounted in the sleeve 44 is a fastener 46 against which there is biased a coil spring 48 that urges a ball 50 against the valve stem 36.

The numeral 52 represents a straight bi-metal arm having one terminal 54 rigidly secured to the support 26 opposite openings 28. The opposite terminal 56 of the arm 52 extends between the sleeves 4-2 and 4.4.

The .flow of gas through the conduit I2 is controlled by :a well known flash type button valve V having a reduced lower end E loosely fitted in the valve casing C to permit a small quantity of gas to pass about the end E and from the tip 30 when the valve V is urged to its raised position by a spring S, When the valve V is manually depressed, against action of the sprin S, a peripheral groove G in the valve will register with the conduit I2 and permit a relatively large quantity of gas to flow from the tip 30 to increase the length of the flame at the tip, as shown in Figure 2, required for lighting gas passing through the burner. In practical use of th device, when a flame 58 is emitted from the tip 36 of the pilot tube t2, the flame will engage the bi-metal arm 52, thus flexing the arm 52 which will move the sleeves 42 and 44 and hence actuate the valve stem 36 to position the valve 38 relative to the discharge opening 46 of the conduit I4 permitting gas to enter the burner IE to be ignited by the pilot flame. Should the pilot flame 58 become extinguished, as it will be after the burner is lit, that is, the long lighting flame from the pilot returns to only a small flame, the heat from the burner flame will keep the bi-metal unit in an open valve position until the burner flame is extinguished. The pilot flame opens the valve 38, the burner flame heat keeps it open. When the heat is removed'the valve 38 will close.

It should be noted that a lost motion slipfriction connection is provided between the arm 52 and the stem 36 so that when the valve reaches its closed position as shown in Figure 1, the sleeve 44 may move to the left as the bimetal arm 52 continues to cool, and when the valve reaches its open position and the valve stem 36 engages the burner wall 34, the sleeve may move to the right as the bimetal arm 52 continues to heat, as shown in Figure 2. This particular structural arrangement will serve to make the valve respond immediately to presence or absence of flame and will relieve stresses.

Reference is now directed to Figures 3 and 4 wherein there is disclosed the present invention in slightly modified form In this embodiment, the numeral 60 represents an outlet conduit having a pilot tube 62. Removably secured to the conduit 60 is an annular burner 66 having perforations 68 and an annular opening 70.

Removably secured to the upper face of the burner 60 by fasteners 72 are the attaching ears 74 of an annular ring 16 positioned within the opening 70. This ring 78 supports a pair of spaced parallel ears 78 between which there extends a rigid shaft 80. Coiled about the shaft 88 is a bimetal arm 82 having one end 84 fixed to the shaft 80. The opposite end 86 of the arm 82 is fixed to one end 88 of an arm 90 supporting a pair of guide pins 92 that are slidably mounted in opposed channel shaped guide tracks 94 that are rigidly secured diametrically between the ring 16. The free end 96 of the arm 90 is pivotally connected to a link 98 that is pivotally connected to further link I that is rigidly carried by the valve 102 controlling the conduit 64.

In practical use of the device, the discharge tip I04 of the pilot tube 62 is positioned adjacent the bi-metal arm 82 so that when a flame extends from the pilot tube, the same will effect a coiling of the arm 82 to slide the arm 90 forwardly thus actuating the links 98 and I00 and opening the valve I02.

It should be noted, that the guide tracks 94 are of such a length as to accommodate both the maximum expansion and contraction of the arm 82 although the valve I02 will be opened with only a slight movement of the arm 90.

In view of th foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

t is to be understood, however that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

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

1. In a safety gas burner including a supply conduit, a burner removably carried by said con- 4 duit, said burner having a central opening, a pilot tube disposed over said burner and having a discharge tip, a support carried by said burner adjacent staid opening, and a valve controlling the flow of gas through said conduit; a thermostatic spring having a pair of terminals, one terminal of said spring being secured to said support, the opposite terminal of said spring being spaced from the tip of said pilot tube and connected to said valve, said spring being responsive to heat from said pilot tube for actuating said valve.

2. In a safety gas burner including a supply conduit, a burner carried by said conduit, a valve controlling the flow of gas through said conduit, and a pilot tube disposed above said burner; a pair of ears carried by said burner, a fixed shaft carried by said ears, a coiled bi-metal member having first and second end portions, the first end portion of said member being fixed to said shaft, an arm slidably mounted on said burner and connected to the second end portion of said member, and means operatively connecting said arm to said valve, said member being responsive to heat from said pilot to actuate said arm.

3. The combination of claim 1 wherein said valve is slidable, and a slip-friction connection between said valve and said spring to permit flexing movement of the spring after the valve is selectively fully closed and fully opened.

4. The combination of claim 3 wherein said slip-friction connection includes a sleeve disposed transversely of said valve and having a transverse opening slidably receiving said valve, a spring member within said sleeve, a ball also Within said sleeve and urged by said spring member against said valve, and a plug threaded in said sleeve and engaging the end of said spring member remote from said ball.

LIONEL J. PELLERIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 993,111 Schneider May 23, 1911 1,703,854 Fonseca Feb. 26, 1929 1,773,198 Piatt Aug. 19, 1930 1,813,048 Grayson July 7, 1931 1,842,339 Doen Jan. 19, 1932 1,926,218 Valmore Sept. 12, 1933 1,936,001 Valmore Nov. 2, 1933 1,943,045 Te Pas Jan. 9, 1934 1,952,550 Kerr Mar. 27, 1934 1,973,955 Hartfield Sept. 18, 1934 1,995,029 Grayson Mar. 19, 1935 2,015,318 Schnepp et al Sept. 24, 1935 2,068,429 Mustee Jan. 19, 1937 2,075,278 Hageman Mar. 30, 1937 2,264,808 Rabinowicz Dec. 2, 1941

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