US2655991A - Radiant gas burner - Google Patents

Description

w, KENNEDY RADIANT GAS BURNER Oct. 20, 1953 Filed Nov. 2, 1948 INVENTOR WH LTER Ks NNEDY ATTORN Patented Oct. 20, 1953 UNITED STATES PATENT OFFICE RADIANT GAS BURNER Englewood, N. J.

Application November 2, 1948, Serial No. 57,917

11 Claims. (01. 158-413) This invention relates to gas burners of the radiant-type adapted for use in conjunction with the various types and kinds of gas supply. More particularly, the invention deals with burners of the type and kind under consideration adapted for use in broilers or broiler compartments of ranges to provide quick and effective broiling operations upon various types and kinds of food. The novel features of the invention will be best understood from the following description, when taken together with the accompanying drawing, n which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and, in which:

Fig. 1 is a diagrammatic side view of a portable broiler, showing one of my improved broiler units mounted in the upper portion thereof.

Fig. 2 is an enlarged sectional view on the line 2-2 of Fig. 1, showing only the broiler unit.

Fig. 3 is a perspective view of part of one of the burner tubes of the broiler, showing part of one of the radiants thereon; and

Fig. 4 is a section on the line 4- i of Fig. 2, with parts of the construction broken away.

In Fig. 1 of the drawing, I have shown, to illustrate one adaptation and use of my invention, a diagrammatic outline of a portable broiler Ill, having suitable vertical supports I I therein for a pan or receptacle I2 to be positioned in predetermined arrangement in the chamber I3 of the broiler and with respect to the broiler unit I I, which is arranged in the upper part of the broiler and beneath a vent or flue chamber I2 at the top of said broiler. The unit I4 is shown more in detail in Fig. 2 of the drawing, the unit comprising an elongated manifold I5 of rectangular crosssectional form to which is attached a rectangular frame It, part of the frame being formed by the manifold I5.

Coupled centrally of the manifold I5 is a gas and air Venturi tube Il, with which a suitable supply I8 is coupled, the latter extending through one wall of the broiler Ill, as diagrammatically seen in Fig. 1. The housing I5 has, spaced longitudinally of the inner wall thereof, sleeve-like members I 9 extending into and out of the manifold to form seats for on end of a corresponding number of burner tubes 2%.

In Fig. 2 of the drawing, four of such burner tubes are shown coupled with the manifold.

Each of the tubes 28 are of the same construction and these tubes are formed from two semicircular members having laterally extending flanges, as at 2!. The flanges are passed outwardly longitudinally at spaced intervals to form flat and relatively thin burner discharge openings 22, note Fig. 3. Between the discharges 22, the flanges are welded or otherwise secured together where they abut, as at 23. The flange portions 2| terminate short of the ends of the tube to provide cylindrical mounting e'nds which fit into the sleeves I9, as seen at 24, in Fig, 4 of the drawing. The other end fits into a cap 25 welded or otherwise secured to the member I6 of the frame IS.

The frame It includes, on its walls, inwardly extending flange portions 26, which are arranged in alinement with the flanges 2| on the tubes and these flanges collectively support a series of radiants 21 in the arrangements seen in Fig. 2 of the drawing. Each radiant is of the same construction and, therefore, the brief description of one will apply to the other. Each radiant comprises a U-shaped or elongated channel-shaped plate of perforated sheet metal, preferably of the heat resisting type, i. e., the radiant has a top wall 28 and depending side walls 29, the latter terminating in inwardly and upwardly turned flanges 30. The flanges 30 form grooves longitudinally of the lower ends of the walls 29 to receive the edges of a wire mesh strip 3I flexed to curved cross-sectional form in arrangement in the channel defined by the walls 28, 29 of each radiant. In assemblage, one radiant is disposed between the side burner tubes 20 and the corresponding side walls of the frame I6; whereas, two of the rods are disposed between adjacent tubes 20, again as clearly illustrated in Fig. 2 of the drawing. The openings or nozzles 22 extending into the areshaped chambers 32 formed by each of the radiants, thus providing a substantially continuous glow or reflected glow over the entire surface of the broiler unit. It will be understood, in this connection, that the curvature of the wire mesh radiants 3| produces this widespread reflection of the glow into the firebox or chamber I3 of the broiler.

It is also preferred that the housing l5 has centrally beneath each of the burner tubes 20 small burner jets 33 for directing a flame in the direction of each of the burner wall sides of the tube, so that, regardless of where the burner may be ignited, the flame will be spread throughout the entire burner area to insure combustio or ignition of all of the nozzles of the burner tubes.

On the burner unit I4 is an extending wall or flange 36 which is adapted to rest upon one or more cleats 35 in the portable broiler, as indicated in Fig. 1 and, by virtue of this construction, the entire burner unit I4 may be quickly detached from the broiler by simply raisin the Venturi tube It off from the fitting I8 and then swinging the rear portion of the burner I l downwardly and outwardly through the opening 36 of the broiler. In other words, the rear portion of the broiler unit I I is supported on the fitting I8 and the forward portion thereof on the cleat or cleats 35, upon which the flange 34 rests. By utilizing a radiant. type of burner of the kind under consideration, a broiler or broiler compartment;

sideration maintains the desirablecoloring inthe. broiled foods and simulates broiling; over hot;

coals of an open-fire producingrthisresuh'i. ingreater efliciency by virtue of even distribution of radiant heating. It will be. noted from aconsideration of Fig. 2 of the drawing that" the radiant elements 2? are held in position or against accidental displacement by retaining straps 31 secured in position by screws 35% directly above each burner tube. The straps 3? areot sufficient length to extend over upper surfaces of the elements 2.; at each side of each tube.

It will also be apparent that burners of the type and: kind under consideration can be economically constructed by reason of the: simple structure 01" the burner tubes used conjunction with the manifold and the frame in which the manifold is arranged and, further, the simple structure of the radiants employed, which,

consist of the elongated channelled perforated strips having the inturnedafianges supportingthe raw edges. of strips of wire' mesh fabric. These strips are simply slid into the perforated stripsand, when assembled, are firmly supported in, said strips. The perforated strips provide free ventilation, while at the sametime,v producinganeifective back for the glowing elementswhioh comprise the wire mesh strips.

These burner units may be constructediin. vars ioussizes and, by virtue of the mannerof assemb-lage; it is simply a question of the size ofv the manifold, the numberof the tubes; employed, the proportionate size of the. burner frame and the number of radiant units employed therein. By standardizing on the structure ofthe radiant elements andtne burner tubes, these varioussizedor capacity burners can be employed.

The usev of my improved burner will bev apparent froma consideration of my prior application Ser. No. 287,239; filed November. 2.0, 19%,. now. Patent No. 2,572,870, in which a broiler is disclosed and the diagrammatic showing of the broiler at it, in the present application; can be regarded as a showing of broilers; of. this general type andkind.

Having fully described my invention, what- I- claim as new and desire to secure by Letters.Pat-- out; is:

1. In. radiant burners of. the class described comprising an, elongated housing. with a plurality ofv burner tubes extendingv from said housing in spaced parallel relationship toeach other, each. tube comprising a pair of elongated stripsof semicircular cross-sectional form and: terminating at side edges in laterally extending flanges, said flanges being oifset at longitudinally spaced intervals, means securing the flanges ofsaid parts together, intermediate the offset portionsto form longitudinally of side edges of the burner tube discharge nozzles, radiant elements-supported on said flanges and extending longitudinally be tween adjacent tubes, each of said elementscomprising an upwardly curved wire mesh strip, and.

a perforated inverted U-shaped member supporting each strip, and said strips overlying and being. arranged directly above all of saidnozzles.

2. In radiant burners of. the class describedcomp-rising an elongated housing with a plurality of burner tubes extending from said housing in spaced parallel relationshipstoi each other, each tube comprising a pair of elongated strips of semi-circular cross-sectional form and terminating at side edges in laterally extending flanges, said flanges being offset at longitudinally spaced intervals,,mea-ns securing the flanges of said parts together, intermediate the offset portions, to form longitudinally of side edges of the burner tube; discharge: nozzles, radiant elements supported on sai'dfianges and extending longitudinally between adjacent tubes, each of said elements comprising an upwardly curved wire mesh strip,. a. perforated inverted U-shaped member supporting each strip, said strips overlying and being; arranged: directly aboveall; oi said-nozzles and means comprising; a, frame arranged in. aligne' ment' with-.sai'dtubes and elements for support ing the burner tubes and said. radiant elements in assembled relationship.

3. burners; of the class described having a plurality of burner tubes arranged in parallel spaced relationship to. eachother with burner nozzles spacedlongitudina-lly of opposed sides of: each tube, radiant elements. supported on said nozzles and disposed longitudinally between adiacent tubes, each element comprisin a; perforated. elongated strip of predetermined crosssectionalform, and an elongatedupward-ly curved wire mesh body disposed onthe surface of said strip exposed to said nozzles; and-all of the mesh bodiesoi said.- elements, beingarranged directly over and inclose'proximi-ty to the. discharges ofv said nozzles.

4. Inbur-nersof theclass describedhaving aplurality of burner tubes arrangedin. parallel spaced relationship: to each other with burner nozzles spaced longitudinally of opposed-sides of. each tube, radiant elements supported. on said nozzles and disposed longitudinally between adjacent tubes, each elementcomprising a; perforated elongated stripof predetermined crosssectional form, an elongated upwardly curved wire mesh. body disposed on the-surface of said strip exposed to said nozzles, all. of the mesh bodies. of; said elements being arranged directlyv over and in close. proximity to the.- discharges. of said nozzles and means at. side edge: portions; of said strip. supporting said wire meshbody, and providing longitudinally sliding movement of the wire mesh body respect to, said strip.

5. In burners ofthe class described havin a.- plurality of' burner tubes arranged in parallel spaced. relationship to each other with burner nozzles spaced longitudinally of opposed sides of each. tube, radiant elements supported onsaid nozzles anddisposed longitudinal-1y between adjacent tubes, each element comprising a perforatedelongated stripof predetermined; crosse sectional form, an. elongated upwardly curved.

wire meshbody disposed on the surface 01% said strip exposed to said nozzles, all of the mesh bodies of said elements being arranged directlyover and in close proximity to the discharges-.012.

said nozzles, means at side edge portions. of said strip. supporting said wire mesh. body and providing, longitudinal sliding. movement. of: the wire mesh body with respect to. said strip, and said: last named, means comprising. inwardly and: upwardly extending. flanges. on said strip;

6 A radiantv forf burners-of the character described, said radiant comprising two relatively sliding; elongatedv parts,- one part comprising a;

perforated:shalloawrchannelled strip having: wide-- ly spaced narrow side walls, the channelled surface of said strip being directed downwardly, the other part comprising a wire mesh body of an upwardly curved cross-sectional contour, and said body being disposed on and extendin over the area of one surface of said perforated part.

7. A radiant heating unit of the character described, said unit comprising a tubular housing into which a gaseous mixture is adapted to be supplied, a plurality of burner tubes extending from said housing in spaced paraallel relationship to each other, said tubes having laterally directed and longitudinally spaced discharge nozzles, the nozzles of adjacent tubes being widely spaced, a frame arranged in the plane of and encircling said burner tubes, a plurality of radiant elements mounted in the frame and completely covering the space between the adjacent tubes, each element comprising a perforated channellel strip in the form of an inverted U-shaped member, a wire mesh strip arranged within the channelled strip and of upwardly curved cross-sectional form, means retaining the mesh strip in said channel strip, and said mesh strips overlying and being arranged directly above said nozzles.

8. A radiant heating unit of the character described, said unit comprising a tubular housing into which a gaseous mixture is adapted to be supplied, a plurality of burner tubes extending from said housing in spaced parallel relationship to each other, said tubes having laterally directed and longitudinally spaced discharge nozzles, the nozzles of adjacent tubes being widely spaced, a frame arranged in the plane of and encircling said burner tubes, a plurality of radiant elements mounted in the frame and completely covering the space between the adjacent tubes, each element comprising a perforated channelled strip in the form of an inverted U- shaped member, a wire mesh strip arranged within the channelled strip and of upwardly curved cross-sectional form, means retaining the mesh strip in said channelled strip, said mesh strips overlying and being arranged directly above said nozzles, and said last named means comprising inwardly and upwardly turned side edges on said channelled strip.

9. A radiant heating unit of the character described, said unit comprising a tubular housing into which a gaseous mixture is adapted to be supplied, a plurality of burner tubes extending from said housing in spaced parallel relationship to each other, said tubes having laterally directed and longitudinally spaced discharge nozzles, the nozzles of adjacent tubes being widely spaced, a frame arranged in the plane of and encircling said burner tubes, a plurality of radiant elements mounted in the frame and completely covering the space between the adjacent tubes, each element comprising a perforated channelled strip in the form of an inverted U-shaped member, a wire mesh strip arranged within the channelled strip and of upwardly curved cross-sectional form, means retaining the mesh strip in said channelled strip, said mesh strips overlying and being arranged directly above said nozzles, said last named means comprising inwardly and upwardly turned side edges on said channelled strip, two elements being disposed between adjacent burner tubes and extending longitudinally thereof, and one element being disposed outwardly of outermost tubes of the burner unit.

10. A radiant heating unit of the character described, said unit comprising a tubular housing into which a gaseous mixture is adapted to be supplied, a plurality of burner tubes extending from said housing in spaced parallel relationship to each other, said tubes having laterally directed and longitudinally spaced discharge nozzles, the nozzles of adjacent tubes being widely spaced, a frame arranged in the plane of and encircling said burner tubes, a plurality of radiant elements mounted in the frame and completely covering the space between the adjacent tubes, each element comprising a perforated channelled strip in the form of an inverted U-shaped member, a wire mesh strip arranged within the channelled strip and of upwardly curved cross-sectional form, means retaining the mesh strip in said channelled strip, said mesh strips overlying and being arranged directly above said nozzles, said last named means comprising inwardly and upwardly turned side edges on said channelld strip, two elements being disposed between adjacent burner tubes and extending longitudinally thereof, one element being disposed outwardly of outermost tubes of the burner unit, said burner tubes being circular in cross-sectional form, and the nozzles thereof being disposed centrally of opposed sides of said tubes.

11. A radiant heating unit of the character described, said unit comprising a tubular housing into which a gaseous mixture is adapted to be supplied, a plurality of burner tubes extending from said housing in spaced parallel relationship to each other, said tubes having laterally directed and longitudinally spaced discharge nozzles, the nozzles of adjacent tubes being widely spaced, a frame arranged in the plane of and encircling said burner tubes, a plurality of radiant elements mounted in the frame and completely covering the space between the adjacent tubes, said element comprising a perforated channelled strip in the form of an inverted U-shaped member, a wire mesh strip arranged within the channelled strip and of upwardly curved cross-sectional form, means retaining the mesh strip in said channelled strip, said mesh strips overlying and being arranged directly above said nozzles, said last named means comprising inwardly and upwardly turned side edges on said channelled strip, two elements being disposed between adjacent burner tubes and extending longitudinally thereof, one element being disposed outwardly of outermost tubes of the burner unit, said burner tubes being circular in cross-sectional form, the nozzles thereof being disposed centrally of opposed sides of said tubes, said nozzles being formed between flange portions of the burner tubes, and said flange portions forming supports for said radiant elements.

WALTER KENNEDY.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,032,860 Possons July 16, 1912 1,614,746 Lyon Jan. 18, 1927 1,954,476 Gloekler Apr. 10, 1934 2,368,802 C'artter et a1. Feb. 6, 1945 2,413,447 Greene Dec. 31, 1946 FOREIGN PATENTS Number Country Date 2,739 Great Britain of 1888 799,159 France Mar. 27, 1936 487,445 Great Britain June 21, 1938 520,940 Great Britain May 8, 1940 524,062 Great Britain July 29, 1940

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