US1931462A - Lighter burner - Google Patents

Description

Oct. 17, 1933. p w srog 1,931,462

LIGHTER BURNER Filed Jan. 30. 1931 an i Patented Oct. 17, 1933'- UNITED STATES PATENT OFFICE LIGHTER BURNER Application January 30, 1931, Serial No. 512,439 and in Germany February 5, 1930 4 Claims. (01. 158-4171) The present invention relates to lighter or pilot burners of the type which are provided with a lighter or pilot valve, adapted to be thermostatically operated and which closes automatically when the ignition flame is extinguished, in order to prevent unconsumed gas from escaping. To be satisfactory, such a lighter burner must be easily operated so that it can be opened even by a small source of heat, for example, by the flame of a match, and keep the valve open immediately after the small lighter flame has been ignited.

For this purpose and according to the present invention, the thermostat operating the lighter valve is constructed as a diaphragm disc which is provided with an opening forming the burner nozzle.

Safety gas burners having a disc-like thermostat are already known, but in these known devices, the thin diaphragm carries a burner tube so that the heat conveyed to the thermostat disc is dissipated by the mass of the burner tube and of the valve body to such an extent that the brief heating action of a match is not sufficient to operate the thermostat.

In a lighter burner the diaphragm of which is simply perforated according to the invention in order to form the burner nozzle, there is no passage of heat to other parts, so that the slight heating by a match is sufficient to open the valve and to ignite the lighter flame. The valve body is preferably separate from the thermostat disc and is secured to a spring which tends to keep the valve open.

Two forms of construction of the invention are shown by way of example in the accompanying drawing in which:--

Figure 1 is a section on the line '1-1 of Fig.

2, showing a lighter burner having a valve body.

riveted to the thermostat disc.

Figure 2 is a plan view of Fig. 1.

Figure 3 is a section on the line 33 of Fig. 4 of a lighter burner having a valve body separate from the thermostat disc.

Figure 4 is a plan view of the lighter valve according to Fig. 3 with the thermostat disc removed.

In the form of the inventions shown in Figs. 1 and 2, the casing a of a lighter burner has a thread b for the connection of a fuel pipe (not shown). The casing is bored through in the longitudinal direction to form a channel 0 adapted to be closed at the top-by a valve 11. A head is formed on the casing and is covered by a thermostat disc e to form a space (i. The ther mostat disc e is secured to the edge of the head by means of a screw cap f and in addition is provided in the centre with an opening 9. The plate valve 1' has arms 72. which are riveted or otherwise secured to the disc e so that when the thermostat disc becomes cold, the valve plate 2' closes the channel 0 opening into the valve space d.

When the thermostat disc is heated for example by the flame of a match, it bends upwards and thereby lifts from its seat the valve plate 2' which is secured to it. The gas issuing from the fuel pipe and through the channel c flows round the plate valve, then through the spaces between the arms h and through the opening g whereon it is ignited by the flame of said match. The heat radiated fromv the ignition flame is sufficient to keep the thermostat disc bent outwardly after the match has been removed. When the lighter flame is extinguished the thermostat disc cools and presses the plate valve i on its seat on the channel 0, so that no more gas can escape therefrom.

So as not to bore through the thermostat disc e for holding the plate valve thereto and in order to reduce the escape of heat, the plate valve can be separate from it, and be suspended from a spring 7c, preferably of plate or disc form, which is secured at its peripheral edge to the upper surface of the rim or edge of the casing a simi larly to the thermostat disc by the cap or nut as shown in the form of construction illustrated in Figs. 3 and l. In this case, a spring disc which is slotted in known manner for the purpose of parallel guiding (Fig. 4) is used; and this spring disc'is provided with supports it which are cut out of the centre part of the disc and bent round or doubled so as to bear against the thermostat disc 6 in such a way that the otherwise flat spring disc is bowed inwardly through its central portion in spaced relation with the thermostatic diaphragm, and a packing disc i glued on to the spring disc is pressed against the mouth of the channel a when the thermostat disc is cold. The spring disc k therefore has a certain tension so, that the packing disc 2" which constitutes the valve can also participate in the movement of the thermostat diaphragm c. The gas issuing from the channel 0 passes through the slots of the spring disc' is and through the spaces between the lugs n to the opening 9 in the thermostat disc e which forms the burner nozzle.

The thermostatic diaphragm may consist of a single metal disc or may be a bi-rnetal disc. Preferably, however, a single metal is used, for

example, rust-proof steel, which has been found to be extremely satisfactory in use. While a bimetallic disc may be used with approximately the same effect for the thermostatic diaphragm, such a diaphragm has the disadvantage of losing its bi-metallic properties of expansion and contraction in course of time.

What is claimed is:

1. A pilot burner foruse with gas jets, comprising a burner casing, a valve seat forming an inlet to said burner casing, a thermostatic diaphragm forming a cover for said burner casing, and a valve cooperating with said valve seat and operable thermostatically by said diaphragm to open said valve when said diaphragm is heated, said diaphragm being provided with an opening forming the burner nozzle.

2. A pilot gas burner comprising a casing, a thermostatic diaphragm enclosing one end of said casing and provided with an opening forming the burner nozzle, anda valve controlling the flow of gas through said casing, said valve being controlled by said diaphragm but spaced therefrom by means having low heat-transmitting capacity.

,3. A pilot gas burner comprising a casing, a thermostatic diaphragm enclosing one end of said casing and provided with an opening forming the burner nozzle, a valve controlling the flow of gas through said casing, said valve being controlled by said diaphragm, and an open-work structural connection between said valve and said diaphragm.

4. A pilot gas burner comprising a casing, a thermostatic diaphragm connected to said casing and provided with an opening which forms the burner opening for the escape of gas which is burned in direct contact with the diaphragm, and a valve controlling the flow of gas through said opening, said valve being controlled by said diaphragm.

FRIEDRICH WILI-IELM STOCKMEYER.

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