US1879992A

US1879992A - Automatic lighter for gas stoves

Info

Publication number: US1879992A
Application number: US591471A
Authority: US
Inventors: Walter F Rogers
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-02-08
Filing date: 1932-02-08
Publication date: 1932-09-27
Anticipated expiration: 1949-09-27

Description

W. F. ROGERS AUTOMATIC LIGHTER FOR GAS STOVES sept. 27, 1932.

Filed Feb. 8', 1952 2 Sheets-Sheet l Sept. 27, 1932. w. AF. Rosi-:RS

AToMATIc LIGHTER RoR @As sTovEs 2 sheets-Sheet 2 Filed Feb. 8, 1932 lil W 'ffl/l. Il lll A M,

` Patented Sept. 27, 1932 UNITED STATES PATENT OFFICE AUTOMATIC LIGHTER FOR GAS STOVESv Application led ll'enruary 8, 1932. SeralNo. 591,471.

This invention relates to automatic lighters used in connection with gas stoves.

Such devices usually include a pilot of the non-flashing type, above which is a hood having channels for conducting to the pilot gas issuing from the burner. In stoves equipped with such devices, the gas is ignited immediately upon the opening of any one of the burnervalves and, if the flame is accidentally extinguished, the gas is automatically re-gnited. One of such automatic lighting devices is shown in Patent No. 1,841,399

issued January 19, 1932.

rlhe automatic lighters heretofore in general use, however, have not been entirely satisfactory because their constructions were conducive to the deposition of carbon inside of the pilot hoods and for the further reason that no proper means was provided for ventilating the hoods.

In all automatic lighters of this general type, when a burner is in operation, some of the ignitedv gas issuing from the burner is constantly passing through the pilot channel leading to the hood. It is, therefore, of importance to provide suitable means for conducting the heated gases away from the pilot hood and out of the burner box.

The main objects of this invention are to provide an automatic lighter having improved means for conducting the heated gas away from the pilot hood; to provide a burner of simple construction which is adapted to produce a blue flame so as to avoid deposits' of carbon resulting from incomplete combustion; and to provide a burner of this kind which is particularly adapted for use as the pilot in connection with automatic lighters.

An illustrative embodiment of this invention is shown in the.y accompanying drawings, wherein Figure 1 is a fragmentary top plan of a gas stove to which an improved lighter is i applied.

Figure 2 is a vertical section of the burner box of the stove; the view being taken on the line 2 2 of Figure 1.

Figure 3 is an enlarged transverse section,

'0 taken on the line 3-3 of Figure 1.

Figures 4 and 5 are enlarged details of the pilot pipe.

Lighters embodying this invention may be used on gas stoves of many different types and, therefore, the accompanying drawings merely illustrate those portions of a burner box which will be helpful in understanding the invention. I

In the form shown, the stove includes a burner box 1 having a front wall 24and rear Wall 3 which support the usual burner top 4 provided with removable grates 5. Extendlng along one'end of the stove, is a supply pipe 6 connected to a manifold 7, which is. located in the forward part of the burner boX. Suspended from the manifold, are the customary valves 8 having handles 9, and rearwardly projecting nozzles 10. Mounted within the burner box, is a pair of horizontal' rods 11 which support burners 12. Four burners are illustrated but it is to be understood that the improved lighter may be used in connection with any number of burners.

The rear burners have mixing tubes 13 and the front burners have mixing tubes 14 extending forwardly to the valve nozzles.

The improved automatic lighting means herein shown includes a pilot tube 15 having its forward end communicating with the manifold 7 and having its closed rear end supported in a bracket 16 secured to the rear partI of the burner top. This pilot tubeis disposed between the burners, as illustrated in Figure l, so as to provide pilot lights for all the burners. Formed in this tube, are two small apertures 17 providing gas outlets. One of these apertures is located between the rear burners and the other aperture is located between the front burners. at the forward end of the pilot tube is adapted to control the amount of gas entering the tube for regulating the size of the pilotflames. The two pilot lights, when once adjusted, are intended to burn with uniform flames without flashing, because the amount of gas passing through the pilot tube is not increased when the burners are automatically ignited.

Formed in the upper surface of the pilot tube, are narrow slits or grooves 19, which f intersect the two outlet apertures-17 to pro- A set screw 18 n vide primary air passages. In the absence 0f such air passages, the pilot lights burn with a yellow fiame and, as a result of the incomplete combustion, carbon is deposited on the tube. It has long been common practice to provide the main burners with mixing tubes having open front ared ends to admit a supply of primary air so as to produce a .blue flame at the burner. However, the pilot tubes heretofore in use have been constructed without any thought of premixing the air and gas.

In order to obtain `the desired results, the grooves 19 should be so narrow as to prevent the formation of a flame therein. These grooves in effect form mixing chambers for the air andgas, and the flame commences at the outer surface of the tube, as illustrated in Figure 5. With such a construction, there is a thorough admixture of the air and gas in the grooves, resulting in complete combustion and blue flames.

Mounted directly above the pilot tube, 1s a roof member 20 which is preferably a metal casting providing a series of gas passages leading to the pilot lights. The rear end of this member is seated in an opening 21 in the bracket 16 and the front end thereof rests on a shelf 22 of the burner top and is provided with a lug 23 projecting downwardly through an opening 24 in the shelf. A cotter pin 25 may be inserted through the lug 23 to secure the member 20 against accidental dis lacement.

ntegrally formed on the lower side of the member 20, is a pair of transversely disposed arms 26 of inverted V-shaped cross section which provide channels 27 for conducting, to the pilot lights, gas issuing from the burners. The central portions of these arms are enlarged to provide curved walls 28 defining chambers 29 for the pilot flames.

The curved walls 28 are provided with openings 30 through which a match may be inserted for lighting the pilots. Recesses 31 are formed in the lower edges of the walls 28 to receive the pilot tube 15.

Integrally formed on the member 20, is a pair of inverted cups 32 located directly above the pilot chambers 29, and spaced 'slightly from the upper edges of the walls 28 to permit free circulation. These inverted cups 32 and the curved walls 28 form hoods l for the pilot lights.

construction herein shown, this is accom-- The main gas burners are provided with lateral passages 33 adjacent the outer ends of the channels 27 whereby some of the gas will be conducted to the pilot flame for ignition as soon as the burner valve is opened. While the burners are in operation, flames issuing out of the passages 33 frequently reach the ilot hoods and, therefore, it is very desiralile to provide some means for conducting the hot gases away from the pilots. In the plished by means of achannel 34 which is formed in the lower side of the roof member 20. The channel 34 is co-extensive with the .p member 20 and it communicates with both of the pilot hoods so as to be adapted to conduct the hot gases to the rear end of the burner box for discharge through ope-ning 35 in the rear wall 3.

In operation, the gas mixture issuing from the passages 17-19 is ignited so as to provide two pilot lights which burn continuously with blue fiames within the chambers 29. To ignite the gas at any one of the main burners, the corresponding valve 8 is opened, whereby some of the gas passes through the outlet 33 and is conducted by one of the channels 27 to one ofthe pilot flames. When the gas is ignited, the flame ignites the gas issuing from the remaining apertures of the burner. Due to the fact that the rear end of the channel 34 is unobstructed, the heated gases are free to pass rearwardlyfrom the pilot hoods for 1kdischarge through the rear end of the yburner ox. f

With this construction, the lighting is entirely automatic upon the opening of any one of the burner valves. Moreover, if the flame at any burner is accidentally extinguished, as for instance, by liquids from the cooking utensils, the escaping gas will be immediately re-ignited.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that details of the construction shown may be altered or omitted without departing from the spirit of the invention as defined by the following claims.

I claim:

1. A stove comprising a burner box, a gas burner, a pilot in said burner box, a hood above said pilot, means providing a channel for conducting to said hood gas issuing from said burner, and a support for said hood, said support being 'formed to provide a channel extending from said hood to one wall of said burner box to permit the escape of heated gases.

2. A stove comprising a frame having a burner box, two pairs of burners in said burner box, a pair of pilots located between said burners, a bar supported in said burner box,

hoods formed on said bar above the respecfrom said hood to one side of said burner box to permit the escape of heated gases.

4. A stove comprising a burner box, a gas burner, a pilot in said burner box, ahood having an lmperforate top above said pilot, means providmg a channel for conducting to said hood gas issuing from said burner, and a support for said hood, said support providing another channel extending from said hood to one side of said burner box to permit the escape of heated` gases.

5. A stove comprising a burner box, a gas burner, a pilot in said burner box, a hood having an imperforate top above said pilot, means providing a channel for conducting to said hood gas issuing from said burner, and means providing another channel extending from said hood to a point spaced from said burner.

6. A stove comprising a burner box, a pair of gas burners, a pilot located between said burners, a hood above said pilot, means providing channels for conducting to said hood gas issuing from said burners, and means providin another channel extendin from said hoo to one side of said burner ox.

7 A stove comprising a burner box, a pair of gas burners, a pilot located between said burners, means providing channels for conducting to said hood gas issuing from said burners, and means providing another channel extending from said hood to one side of said burner box, all of said channels being open at their lower sides substantially throughout the lengths thereof.

8. A stove comprising a burner box, two pairs of gas burners, a pilot located between the burners of one pair, another pilot located between the other two burners, hoods above said pilots, means providing channels for conducting to said pilots gas issuingfrom said burners, and other means providing another channel communicating with both of said hoods.

9. A stove comprising a burner box, a pair of pilots, a pair of gas burners located on respectively opposite sides of each of said pilots, hoods above said pilots, a supporting member for said hoods, said supporting member defining a channel providing communication between said hoods, and arms formed on said supporting member and defining other channels arranged to conduct to said hoods gas issuing from said burners.

10. A stove comprising a burner box, a horizontal pilot tube having a pair of spaced pilot openings therein, a pair of gas burners on respectively opposite sides of each of said pilot openings, a top member located above said pilot tube and extending longitudinally thereof so as to form a protecting cover for said tube, and hoods l formed on said top member directly above said pilot openings, said top member defining channels for conducting gas from said burners to said hoods,

said top member defining a channel located directly above said pilot tube for conducting heated gases away from said hoods.

11. A stove comprising a burner box, a pilot tube having a pilot opening, a pair of burners on respectively opposite sides of said pilot opening, a horizontal top plate located above said tube, and a hood on said top plate directly above said pilot opening, said top plate defining channels for conducting to said hood gas issuing from said burners, said top plate having a channel disposed directly above said pilot tube and extending longitudinally thereof for conducting heated gases away from said hood.

WALTER F. ROGERS.