US2661057A - Gas burner head and secondary air baffle - Google Patents

Description

Dec. 1, 1953 M. RESEK 2,661,057

GAS BURNER HEAD AND SECONDARY AIR BAFFLE Filed OC. 6, 1949 l 111111111', C I', I i lllll'" A WW2 J3 7" L7 @ff IIA Il, /V n swlrmr, w 3 J""` 50/ onse a4 is o o a6 Q Q e; a *9 /l l' Lf mq z mm y A, f g a r g r INVENTOR. MARC RESEK' wwvvmxiw rra/eNEyS Patented Dec. 1, 1953 UNITED STATES PATENT oFFlcE v 2,661,057 GAs BURNER HEAD AND SECONDARY AIR BAFFL Marc Resek, Cleveland Heights, Ohio, assignor to Perfection Stove Company, Cleveland, Ohio, a

corporation of Ohio Application October 6, 1949, Serial No. 119,975

2 Claims. 1

emitting port area, as by increasing, relative to f prevailing practice, the number of ports, or the size thereof, or both, and incorporating in the burner means for delivering to each port the requisite amount of air to render combustion of the gas issuing therefrom substantially complete.

In the form of my invention presently preferred, the burner comprises a hollow annular head that encloses a gas chamber and surrounds a central Vertical air passage or flue. The head is provided with gas emitting ports about its periphery adjacent its top, and said ports are desirably arranged in two circumferential rows that are spaced apart a suitable distance in a vertical direction, the ports of one row being out of vertical alignment with those of the other row. Means, desirably in the form of a Y-shaped mixing tube or so-called venturi, is provided for supplying gas to said chamber, the branches of Said tube joining the bottom of the head on opposite sides ofl said central air passage or flue. Supported above in suitably spaced relation to the top of the burner head is a disc-like deflector, the edge of which is above the peripheral portion of the head. When the burner is in operation, this deector serves to direct the air rising through the central passage or iiue outwardly across the top of the burner and in such relation to the gas emitting ports that an ample quantity of air is supplied to the gas issuing therefrom to render combustion of the gas substantially complete. Where two vertically spaced rows ,of apertures are used, as in the present preferred form of the invention, air supply for the apertures of the lower row is principally supplied by the air which naturally rises about the periphery ofV the burner head during burner operation. However, with air supplied from both above and below, all jets of gas issuing from the apertures are insured a quantity of air ample for combustion purposes. A further object of the invention is to so shape the aforesaid deector `that it will enhance the appearance of the burner; that it will effectively change the direction of iiow of air rising through the central passage or iiue from a vertical to4 a horizontal direction, and that, by reason of its shape, the deflector will be prevented from warping and snapping back and forth due to alternate Y 2 heating and cooling, such as might occur if the deflector were a flat disc.

One embodiment of my invention is shown in.

the accompanying drawing, and while I shall proceed to describe the same in detail, it will be understood that the invention is not thus limv ited, but is subject to such change and modication as may come within the scope of the claims appended hereto.

In the drawing, Fig. l is a side elevational ViewY of a burner incorporating my improvements, with the lower end of the mixing vtube or venturi broken away; Fig. 2 is a plan View of the burner, and Fig. 3 is an enlarged vertical section through the top portion of the burner on the line 3-3 of Fig. 2.

The burner is preferably fabricated of sheet metal, and in this respect, as well as in construction, it follows quite closely certain embodiments of an invention that forms the subject matter of the application of Harris A. Squire, et al., Serial No. 19,554, filed April 7, 1948.

In the several views of the drawing, the head of the burner is designated generally by the reference letter A, the mixing or Venturi tube by the letter B, and the deiiector by the letter C.

vThe head A consists of an inverted sheet metal channel member al, and a bottom wall a2. The web portion of the channel member al constitutes a iiat top wall a3, and the outer and inner flanges thereof provide a peripheral wall a4, and an inner wall a5, respectively. The top wall merges through rounded corners into downwardly diverging portions of the inner and outer walls, the latter wall assuming a cylindricalv shape throughout its lower region, The inner wall a5 terminates at its lower end in an inturned flange a6, above which, for a short distance, said wall is cylindrical. The flange a6 is a considerable distance above the plane of the lower edge of the outer wall a4, and fitted into the lower end of the latter wall is a depending edge flange al of the bottom wall a2. inwardly of a iiat annular portion a8 thereof, the bottom wall assumes a frusto-conical shape and terminates in a flange a9 that is engaged with and is welded to the previously mentioned flange a6 to produce a gastight joint. Similarly treated is the joint between the edge flange of the bottom wall 0:2 and the adjacent edge of the outer wall a4. The bottom wall a2 has diametrically opposite openings through which the upper ends oi the branches b of the mixing or Venturi tube B are projected, this preferably being done before the parts of the head A are joined together so that the joint between the ends of the branches and the wall a4 may be welded on the inside, as indicated in Fig. 3. Also prior to assembling the head A, a ring a10 is tted into the channel a', with an annular flat portion al1 of the ring engaged with the under- 3 side of the top wall a3. Extending downwardly and outwardly from the. portion all of the ring al is a wallal2 whose lower edge is curved outwardly into contact with the wall a4, the major portion of the wall a12 being spaced from and substantially In a sheet metal burner construction, such as shown herein and in the beforementioned application, the above described port characteristic is desirable because the corresponding ports of the two walls provide, jointly, a port depth of proper ratio to port diameter to prevent flash1 back, or the withdrawal of the flame to within the burner head, especially at low burning rate.

The shouldered rivets D serve the further purpose of attaching the deiiector C to the yburner head and of properly spacing its edge portion from the underlying peripheral portion of the head. Holes of proper size and spacing are formed in the annular iiat edge potrion c1 of the deector, and through said holes are extended the reduced upper ends of the rivets D. The denector is then fastened to the protruding ends of the rivets, preferably by welding. Throughout its central region, the deector is curved or arched upwardly to provide a shallow dome-like portion c2. It is found that by shaping the deilector in this fashion, the current of air rising through the flue or passage surrounded by the burner head is turned laterally and horizontally for projection outwardly through the slot-like space between the straight edge portion c1 of the delector and the underlying flat top wall of the burner head. From the relatively large volurne of air thus supplied to the region immediately above the peripheral portion of the head and that which rises about the burner head during burner operation, ample air is supplied to the liets of gas issuing from the apertures a15.

Having thus described my invention, what I claim is:

1. A gas burner comprising an annular head providing a centralgair passage, said head being formed by two sheet metal elements, the rst of said elements being of channel formation and including top wall, a peripheral wall, and an inner wall, the second sheet metal element being formed to provide a substantially flat bottom wall having its outer edge connected to the lower edge of said peripheral wall and its inner edge joined to the lower edge of said inner wall, a sheet metal ring-like member nested in the first described element and having an annular iiat portion engaged with said top wall and a downwardly divergent peripheral wall substantially parallel to the surrounding portion of the first mentioned peripheral wall and in contact therewith adjacent the lower edge of the member, said peripheral walls being provided with gas emitting ports, the top wall and underlying portion of said ring-like member having registering apertures that are spaced apart about the head, fastening means extending through said apertures and serving to bind said member to the top wall, a deflector havinga shallow dome-shaped central portion and arranged above and in substantially concentric'relation to the head, said means having their upper ends connected to the deflector whereby the latter is supported above and in spaced relation tothe head with its edge above the peripheral portion thereof, and means for supplying gas to the space enclosed by said sheet metal elements.

2. A gas burner comprising an annular head providing a central air passage, said head being formed by two sheet metal elements, the rst of said elements being of channel formation and including a substantially. iiat top wall, a peripheral wall flaring downwardly therefrom a distance and then terminating in a cylindrical portion, and an inner wall that extends generally downwardly and inwardly from the top wall and terminates in an edge portion that is spaced a substantial distance above the plane of the bottom edge 'of said peripheral wall, the second sheet metal element being formed to provide a substantially ilat bottom wall having a depending peripheral flange that fits within the lower end of said peripheral wall and is joined thereto, said bottom wall being flanged upwardly and inwardly about its inner edge and connected to the lower edge portion of the aforesaid inner wall, a sheet metal ring-like member nested in the first element and having an annular ilat portion engaged with said top wall and a downwardly divergent peripheral wall substantially parallel to the surrounding portion of the iirst mentioned peripheral wall and. in contact therewith adjacent the lower edge of the member, said peripheral walls being provided with gas emitting ports, the top wall and underlying portion of said ringlike member having registering apertures that are spaced apart about the head, fastening means having reduced lower ends extended through said apertures and provided with abutments below said underlying portion of the ring-like member to bind said member to the top wall, a circular deilector having a flat peripheral portion and a shallow dome-shaped central portion, said peripheral portion being provided with apertures, and said fastening means having reduced upper ends extended through said apertures and connected to the deector whereby the latter is supported above and in spaced relation to the head with its edge above the peripheral portion thereof, the bottom wall having an opening, and a, mixing tube having its upper end connected to the bottom wall about said opening.

MARC RESEK.

References cited in the me of this patent UNITED STATES PATENTS Number Name Date 1,844,151 Friedman Feb. 9, 1932 1,945,934 Dollin et al Feb. 6, 1934 1,956,857 Cunningham May 1, 1934 2,159,847 Garner et al. May 23, 1939 2,275,555 Power Mar. 10, 1942 2,372,953 Hurlbut Apr. 3, 1945 2,428,998 Simpson Oct. 14, 1947 2,486,278 Harper Oct. 25, 1949 FOREIGN PATENTS Number Country Date 626,871 Germany Mar. 4, 1936

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