US2025351A - Igniter for gas burners - Google Patents

Description

Ema 24, 135, I O. J) LEINS 2,@25,351

IGNITER FOR GAS BURNERS Original Filed April 30, 1950 Patented Dec. 24, 1935 UNITED STATES PATENT OFFICE IGNITER FOR GAS BURNERS Application April 30, 1930, Serial No. 448,603 Renewed April 29, 1935 4 Claims.

My invention relates to igniters for gas burners and contemplates an improvement to guard against the escape of unburned gas from the burner in the event that the flame is quenched by liquid boiling over the sides of a vessel placed over the burner.

It is well known that, in the use of gas ranges, the burner flame is sometimes quenched by liquid boiling over the sides of a vessel on the range,

entailing the escape of large quantities of gas where the range is, for the time being, unattended.

My invention provides means for automatically re-igniting the gas issuing from the burner in cases where the flame is extinguished in that way.

My invention is illustrated in the accompanying drawing in which- Figure 1 is a plan view of an arrangement em- 0 bodying my invention, and

Figure 2 is a partial sectional view taken on the line 2-2 of Figure 1, looking in the direction indicated by the arrows.

The usual gas manifold is illustrated at 3. The

gas burner is illustrated at 4, this burner being fed from the manifold 3 by the usual feed pipe 5, to which air is admitted, in the usual way, at the end nearest the manifold. Gaseous fuel is led into the feed pipe 5 by way of the nozzle pipe 6,

from the manifold 3, in which nozzle pipe the usual gas cock 1 is provided. v

An igniter is provided in appropriate proximity to the burner 4. This igniter comprises a tube 8 leading from the manifold 3 and terminating in a torch head 9 an appropriate distance from the burner 4. Although only one burner is shown, it is, of course, understood that gas ranges embody a number of burners, usually four, and the torch head 9 is disposed centrally within these circularly arranged burners. A protecting hood I0 is mounted over the torch head 9 upon a flanged perforated collar l2 supported on the upcurved end of the tube 8, as shown in Figure 2, below the torch head. The hood II] has the openings l I near the top and four openings l3, l3

in the circular side wall, each in line with the respective burner on the range. A tube 14 leads from each opening l3 toward the respective burner, as illustrated, each of these tubes having the longitudinal slot l4 at the bottom thereof to provide for the entry of air. The torch head 9 has four pilot flame openings l6 directed radially in line with the centers of the openings I3, respectively.

At the end of the tube 8 near the manifold 3 the valve I5 is provided. This valve is of the type well known, which has a constant by-pass and which, when the button I5 is depressed, effects the flow of a greatly increased quantity of gas. By this arrangement a pilot light is main- 5 tained at the four ports [6 by the gas by-passed through the valve l5, and when the burner is to be ignited, its gas cock 'I being opened, the button I5 is depressed to admit the flow of the greatly increased quantity of gas, as has been pointed 1o out. This causes the pilot flames at IE to be proected radially outwardly, through the tubes l4, far enough to ignite the particular burner to which gas has been admitted.

Extending from the burner 4 toward the re- 15 spective adjacent tube I4 is a small tube l6 which carries at its end the torch head I! extending upwardly into the respective tube !4, as illustrated. This torch head has the port [8 drilled in the'side thereof and so positioned as to be 20 directed toward the burner 4. When the pilot light at I6 is projected radially by the depression of the button [5, after the opening of the gas cock 1, the gas issuing from the port I8 is ignited, and it remains ignited so long as the gas cock 1 25 is open.

In the event that liquid, boiling over the sides of a vessel disposed over the burner, falls upon the burner, and quenches the flame thereon, it does so just to the extent that the liquid fills 30 the burner openings 4. Just to the extent that burner openings 4 are closed the pressure within the burner is increased. This increase in pressure causes the projection of the flame from port l8, over the burner, as indicated in Figure 2, 35 and as soon as the filled burner openings become cleared by the evaporation of the liquid therein, the gas issuing therefrom is ignited by this temporarily projected flame. As such reignition takes place, the gas pressure within the burner 40 is obviously gradually restored and, accordingly, the flame at l8 gradually recedes to its normal length. Obviously, except for this automatic reignition, the gas which would issue from the cleared burner openings 4' would be unignited, entailing the danger hereinabove referred to. It will also be noted that torch head I1 is protected by tube I4 against quenching.

The above description sets forth an example 50 of an embodiment of my invention and it is understood, of course, that changes and modifications might be made without departing from the spirit and scope thereof. I also desire to point out that I have successfully used the 55 arrangement of my invention with gases now in common use of from 500 B. t. u. to 5000 B. t. u.

I claim:

1. In combination, a gas burner, a torch head placed in proximity to said burner and having a port directed toward said burner, said torch head being operatively connected to said burner to receive gas under pressure therefrom affected by the pressure within said burner so that increase of pressure within said burner will increase the pressure within said torch head in order to project a flame at said port over said burner, and flash ignition means operable to simultaneously and independently initially ignite said torch head, and said burner.

2. In combination, a gas burner having burner openings, a torch head placed in proximity to said burner and having a port directed toward said burner, said torch head being operatively connected to said burner to receive gas underpressure therefrom affected by the pressure within the burner for maintaining a pilot flame which is insuflicient to reach the burner when the burner openings are open and is projccted to the burner when the greater portion of the burner openings are filled by liquid boiling over and upon the burner, flash ignition means operable to simultaneously and independently ignite said burner and said torch head, and a tube positioned to direct the flame from said flash igniter in igniting relationship to said torch head and said burner.

3. In combination, a gas burner having burner openings, a torch head placed in proximity to said burner and having a port directed toward said burner, said torch head being operatively connected with said burner to receive gas under pressure therefrom affected by the pressure within the burner for maintaining a pilot flame which is insufiicient to reach the burner when the burner openings are open and is projected to the burner when the greater portion of the burner openings are filled by liquid boiling over and upon the burner, a flash pilot lighter remote from the burner, a hood for said pilot lighter and a protecting tube extending from said hood to a point adjacent said burner, said tube enclosing the ported portion of said torch head, said pilot lighter functioning to project a lighting flame through said tube to ignite the torch head and to directly ignite the burner independently of said torch head.

4. In combination, a gas burner having a plurality of gas openings therein, a torch head placed in proximity to said burner and having means connected to the interior of said burner to conduct gas under pressure from said burner tosaid torch head, said torch head having a gas port directed toward said burner, and a comnoon means for simultaneously and independently igniting gas issuing from the burner opening and from said torch head port, said torch head serving to ignite said burner only when said gas openings of said burner are substantially closed subsequent to the ignition of gas issuing from said torch head port.

OSCAR J. LEINS.

Images