US2169958A - Spirit and like cooking stove - Google Patents

Description

Aug. 15 1939 J.- G. LINDMARK 2,169,958

SPIRIT AND LIKE COOKING. STOVE Filed July 16, 1937 //7 vemor:

Patented Aug. 15, 1939 UNITED star ATENT OFFICE Application July '16,- 1937, Serial No. 153,961 In Sweden December 18, 1935 2 Claims.

This invention relates to a cooking stove of the kind wherein liquid fuel is fed under pressure from a receptacle to a spherical burner head through a pipe coil which surrounds the latter, means being provided for vaporizing the fuel by the heat and for mixing it with air before it reaches the burner head.

The object of the invention is to simplify the construction and increase the efiiciency of the stove, so as to renderit particularly suitable for use with fuels such as methylated spirit, and the invention consists essentially in a particular construction of burner for this purpose.

Fig. 1 of the accompanying drawing represents by way of example a diagrammatic side view, partly in section, of the essential parts of the stove constructed according to the invention,

Fig. 2 is a corresponding plan view.

The methylated spirit or other liquid fuel whereby the stove is operated, is contained in a receptacle l which, according to the illustrated arrangement, is maintained in an elevated position for feeding the fuel by gravity through a supply pipe 3 to a vaporizing pipe 4. The latter pipe is fitted with a valve 5 by means of which a regulated supply of vapour is fed through a pipe t to a jet nozzle 9. The vapour jet from the latter is directed through a collar ll into a hollow sphere 8 which forms the burner head and wherein the vapour will be intimately mixed with the air which is drawn into the head by the injector action of the jet. Part of the pipe 6 is formed into a coil 1 which snugly embraces and carries the burner head. In addition to the annular row of burner apertures It] made in the upper portion of the burner head, the latter is also formed with apertures l2 located beneath the coil 1, so that the flames will be made to play directly on the pipe. The collar l I is preferably adjustable for regulating the air supply. Opposite the burner head 8, the pipe 4 carries on its underside a plate I3 which is exposed to the heat of the burner and serves as a heat accumulator.

By the spherical shape of the burnerhead the advantage is obtained that the mixing chamber formed thereby will be free from sharp corners and projections and that the vapour can thus circulate freely together with the air and get intimately mixed therewith. Thus a strong sootless flame will be obtained from the mixture. The large mixing chamber, moreover, will have zontal vaporizing pipe, a receptacle arranged in an elevated position relative to said pipe for feeding liquid fuel thereto, a pipe coil arranged in a lateral position relative to said vaporizing pipe and connected to the latter for receiving 15 vapour therefrom, a hollow, internally smooth spherical burner head formed in one piece, snugly embraced and carried by said coil around the centre of said head which is provided with two series of burner holes, one of said series consisting of a small number of holes located below the pipe coil for preheating said coil, and the other series consisting of a larger number of holesabove the pipe coil for producing the main burner flame, an adjustable collar inserted in the lower part of said. burner head, and a jet nozzle fitted at the free end of the pipe coil and carried thereby vertically beneath said collar.

2. A cooking stove of the character described comprising a valve-controlled substantially horizontal vaporizing pipe, a receptacle arranged in an elevated position relative to said pipe for feeding liquid fuel thereto, a pipe coil arranged in a lateral position relative to said vaporizing pipe and connected to the latter for receiving vapour therefrom, a hollow, internally smooth spherical burner head formed in one piece, snugly embraced and carried by said coil around the centre of said head which is provided with two series of burner holes, one of said series consisting of a small number of holes located below the pipe coil for preheating said coil, and the other series consisting oil a larger number of holes above the pipe coil for producing the main burner flame, an adjustable collar inserted in the lower part of said burner head, a jet nozzle fitted at the free end of the pipe coil and carried thereby vertically beneath said collar, and a plate exposed to the heat of the burner and carried on the underside of the vaporizing pipe for use as a heat accumulator.

JOHAN GUNNAR LINDMARK.

Images