US2691414A

US2691414A - Gas burner

Info

Publication number: US2691414A
Application number: US204841A
Authority: US
Inventors: Ponstingl Franz
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-02-10
Filing date: 1951-01-08
Publication date: 1954-10-12
Anticipated expiration: 1971-10-12

Description

Oct. 12, 1954 PONS-nNGL 2,691,414

GAS BURNER Filed Jan. 8. 1951 TIM 7 1,

Patented- Oct. 12, 41954v 2,691,414 GAS BURNER Franz Ponstingl, Vienna, Austria Application January 8, 1951, Serial N o. 24,841

Claims priority, application Austria February 10, 1950 2 claims. 1

My invention relates to a gas burner which is not extinguished by food boiling over. With this object in view, burners have already been proposed in which the head tted into the free end of the mixing tube, or the cover placed over this end, has two sets of gas mixture outlet apertures disposed at different levels, which are constantly and commonly charged during operation with the gas-air mixture delivered through the mixing tube. One set of such outlet apertures is provided with a cover to prevent obstruction and the flames continuously burning therein when the admission of gas is not cut oli serve as ignition flames for the re-lighting of the gas mixture as soon as this mixture again commences to f low through the first set of apertures.

In accordance with the invention, the said problem is solved, in a burner in which the head of the mixing tube has a cover and two sets of outlet apertures for thel gas-air mixture to be ignited, by providing below the cover, gas paths extending substantially radially to a surrounding wall of the burner, enclosing the head, and from there into the atmosphere, from which gas paths branch paths extend downwards within the said surrounding wall, the said branch paths being screened by the surrounding wall to prevent stopping up due to food boiling over and the like, and also extending into the atmosphere. On stoppage of the normal outlet of the ignited mixture, the said mixture flows through these branch paths to the bottom mouth of these branch paths, where it continues to burn. When the obstructed radial outlet apertures are freed again, the ignited gasair mixture travels up from the branch paths to the rst-mentioned apertures and continues to burn in the normal manner.

Consequently, in contrast to what happens in the known constructions, the mixture only burns y at one set of outlet apertures at a time, which is desirable. Tests have shown that the burner according to the invention operates with complete reliability and is superior to all known constructions.

The other features of the construction according to the invention are hereinafter explained and are illustrated in the drawings, in which Figure 1 shows in plan view a burner with the cover removed, Figure 2 shows the burner in vertical axial section along the line 2 2, Figure 3 shows the burner cover as seen from below, Figure 4 shows this cover in a vertical section on the line 4-4 of Figure 3, and Figure 5 shows the burner in side elevation.

In the gas burner according to the invention.

the head of the mixing tube l is surrounded by an annular element 2 which is set back from the outer surface of the head to leave throughilow` apertures or slots 3 and is connected to the said surface by ribs 1i. The upper edge 5 of the mixing tube head lies at a somewhat higher level than that 6 oi the surrounding annular element or ring and, like the latter, is slightly conically flared in the outward and upward direction, more especially as shown in Figure 2.

The head and the annular element or ring have a top cover 'l which is provided on its lower side (Figures 3 and 4) with a number of

radial ribs

8, 9 .by which it is mounted on the upper edges 5, of the head and ring respectively so as to leave therebetween radial gas paths or ducts IB extending outwardly into the atmosphere. The ribs 8 and d are arranged in the form of two concentric annular rows having between them an annular space Il communicating with the downwardly leading slots 3. The inner ribs 8 are as usual of wedgeform and have sharp edges and a at or slightly curved end face l2 facing towards the stream of gas-air mixture, while the outer ribs 9 are formed with very rounded end faces I3.

Preferably, these ribs 9- have at their outer end downwardly projecting extensions I4 which somewhat overlap the outer wall surface of the ring 2 and thus hold the cover fast. The lower surface of the cover is turned somewhat in conical form in the direction of the edge (Figure 4) .f The gas'outlet passages ID bounded laterally by adjacent pairs of

ribs

8, 9 thus widen somewhat in the outward direction owing to the conical form of the lower side of the cover, and thus facilitate the discharge of the gas-air mixture.

When the gas-air mixture flows in through the mixing tube, it sweeps the obliquely rising passages Iil outwardly and is ignited at the mouth thereof. Owing to the somewhat lower` upper edge 6 of the ring 2, the gas is discharged without obstruction.v

If the outlets from the radial passages into the atmosphere are obstructed owing to food boiling over, the mixture ows down through the slots 3 and burns at the outlets from these slots 3 into the atmosphere. Obstruction of these slots by food is impossible owing to the protection alordedby the ring. When the upper or outer outlets are freed again, for example by evaporation of the water which has boiled over and penetrated therein, or by combustion or carbonisation of organic substances, the flames immediately travel back to the rst burning point and normal operation is resumed.

Instead of combining the mixing tube, the head thereof and the surrounding wall or ring to a selfcontained unit, it may sometimes be preferred to unite only the said head and its surrounding Wall or ring to a single structure and to detachably connect this structure to the mixing tube, say by screwing, A mode of execution of this kind is shown in Figure 6.

What I claim is:

l. A gas burner including in combination a tube for mixing gas and air and provided with an open ended head, a top cover for said head, a vertical annular outer Wall spaced from and surrounding the upper end portion of said head, said outer wall being inseparably connected with said head by radial ribs and forming annular segmented channels of essentially vertical direction between the inner side of the outer wall and the outer periphery of said head, said top cover having on its underside an inner and outer annular set of radial ribs, the said sets being radially spaced and rest on the upper edges of said head and of the said outer ring respectively, thereby forming in combination with the body of the top cover and the edges of the head and outer wall respectively two series of radial channels lying in line and having an interrupted part therebetween, the radial channels opening at the outer side of the cover into the atmosphere and conducting for ignition the gas-air mixture delivered by the mixing tube, the interrupted parts of the channels coinciding with the said vertical segmented channels, said last mentioned channels opening into the atmosphere at the lower end oi the annular outer wall.

2. A gas burner including in combination a tube for mixing gas and air and provided with an open ended head, a top cover for said head, a vertical annular outer wall spaced from and surrounding the upper end portion of said head, the upper edge of said wall being in a level below that of the upper edge of said head, said outer wall being inseparably connected with said head by radial ribs and forming annular segmented channels of essentially vertical direction between the inner side of the outer wall and the outer periphery of said head, said top cover having on its underside an inner and outer annular set of radial ribs the said sets being radially spaced and resting on the upper edges of said head and of the said outer ring respectively, thereby forming in combination with the body of the top cover and the edges of the head and outer wall respectively two series of radial channels lying in line and having an interrupted part therebetween, the radial channels opening at the outer side of the cover into the atmosphere and conducting for ignition-the gasair mixture delivered by the mixing tube, the interrupted part of the channels coinciding with said vertical segmented channels, said last mentioned channels opening into the atmosphere at the lower end of the annular outer wall.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,648,329 Seivert Nov. 8, 1927 2,464,255 Musteel Mar. l5, 1949 2,625,215 Hart et al Jan. 13, 1953