US2720258A

US2720258A - Radiant gas burner

Info

Publication number: US2720258A
Application number: US394298A
Authority: US
Inventors: Almer H Brodbeck; Harold C Reinhart
Original assignee: Magic Chef Inc
Current assignee: Magic Chef Inc
Priority date: 1953-11-25
Filing date: 1953-11-25
Publication date: 1955-10-11
Anticipated expiration: 1972-10-11

Description

Oct. 11, 1955 A. H. BRODBECK ETAL RADIANT GAS BURNER 2 Sheets-Sheet 1 Filed NOV. 25, 1953 Oct. 11, 1955 BRODBECK ET AL 2,720,258

RADIANT GAS BURNER Filed Nov. 25, 1955 2 Sheets-Sheet 2 III/IIIIIIIIIIII/I United States Patent RADIANT GAS BURNER Application November 25,1953, Serial No. 394,298

7 Claims. (Cl. 158--113) This invention relates to gas burners, and more particularly to the equipment of a gas burner for the broiler of a cooking range or the like with radiants for collecting and radiating the heat of the burner flame.

1 Among ,the several objects of the invention may be noted the provision of improved means for mounting a radiant to extend laterally outward from the side of an elongate gas burner head such as is used in the broiler of a cooking range or the like which allows for free thermal expansion and contraction of the radiant to preclude warping thereof; the provision of a mounting such that the radiant may advantageously be formed of metallic mesh, and particularly of expanded metal; and the provision of radiants and mountings therefor which are economical to manufacture and install. Other objects and features will be in part apparent and in part pointed out hereinafter.

The invention accordingly comprises the constructions hereinafter described, the scope of the invention being indicated in the following claims.

In the accompanying drawings, in which one of various possible embodiments of the invention is illustrated,

Fig. l is a side elevation of a burner of this invention;

Fig. 2 is a plan of Fig. 1;

Fig. 3 is an enlarged vertical section taken on line 3-3 of Fig. 1;

Fig. 4 is an enlarged vertical section taken on line 44 of Fig. l; and

Fig. 5 is an enlarged vertical section taken on line 5-5 of Fig. 1.

Corresponding reference characters indicate corresponding parts throughout the several views of the drawings.

Referring to the drawings, there is shown at 1 a gas burner of a type particularly for use in the broiler of a cooking range. The burner comprises an elongate hollow burner head 3 having a right angle leg 5 at its rearward end. This leg serves as a mixing tube. At the lower end of the leg or tube 5 is a gas inlet indicated at 7, gas being supplied thereto through a pipe P. The tube 5 at its lower end also has an opening 9 (see Fig. 3) in its forward side for admission of primary air. At 11 is shown a conventional rotary shutter for regulating the amount of primary air supplied to the tube 3. The burner head 1 has a series of lateral outlets 13 on both its sides and continuing around its forward end. These outlets are all located in a common horizontal plane.

In accordance with this invention, the burner is equipped with a pair of radiants, each generally designated 15, mounted to extend laterally outward on opposite sides of the burner head 3 above the plane of outlets 13 in position to be heated by the flames issuing from the outlets in the sides of the head. The two radiants 15 are identical and are mounted on the head in the same manner. As shown, each radiant comprises a generally flat rectangular heat-radiating panel 17 of metallic mesh, and particularly of expanded metal, having a length somewhat less than the length of the burner head. Each panel 17 has a support consisting of a stud 19 fixed thereto at a location intermediate its length projecting laterally inward from the inner edge of the panel for connection to the burner head by reception in a hole 21 in the respective side of the head. The support or stud 19 is preferably located centrally of the length of the panel. As shown, each stud 19 may advantageously be made of a length of metal tubing having a flattened portion 23 to which the panel is spot welded as indicated at 25.

Each panel 17 also has a brace 27 extending along its outer edge. This brace preferably consists of a sheet metal angle member. The outer margin of the panel overlies one leg 29 of the angle member, and the other leg 31 of the angle member extends upward along the outer edge of the panel. The outer margin of the panel is attached to leg 29 of the angle member as by centrally located spot welds 33, leaving the panel free of the member toward both ends.

Each panel 17 is also provided at its ends with hook members 35 loosely hooked around end supports consisting of screw studs 37 projecting laterally outward from the respective side of the burner head adjacent its ends. Each stud 37 has its inner end threaded in a tapped hole 39 in the side of the burner head, and has a screw head 41 for retaining the panel in assembly therewith. As illustrated, each hook member 35 consists of a sheet metal blank bent to hook shape and fixed to the end of the panel by spot welds 43. The ends of the leg 29 of the brace lie upon the hook members under the panel, but are free of both these elements. The

holes

21 and 39 are inclined upward in outward direction and each panel is accordingly inclined as shown in Figs. 4 and 5.

In the manufacture of the above-described construction, a complete subassembly is made of panel 17 with its stud 19, its brace 27 and its hook members 35. The subassemblies are then installed on a burner head by inserting the stud 19 in its hole 21, and entering the studs or screws 37 in the hook members 35 and threading them into their holes 39.

The slidable connections between the ends of each panel 17 and the studs 37 provided by the hook members 35 allow for free thermal expansion and. contraction of the panel longitudinally in the plane of the panel to preclude it from warping. The braces 27 are free of the panels toward their ends and also free of the hook members 35 to allow for free differential thermal expansion and contraction of the braces and panels.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As various changes could be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

We claim:

1. A gas burner comprising an elongate burner head and a generally flat heat-radiating panel mounted to extend laterally outward from the side of the head in position to be heated by the flames issuing from outlets in the side of the head, the panel being mounted by means comprising a support fixed to the panel at one location along its length and projecting inward from the inner edge of the panel to a connection with the head, another support for the panel fixed to the head and projecting laterally outward from the head at another location along the length of the panel, and means on the panel slidably connecting the panel and the last-named 3 support to allow thermal expansion and contraction of the panel in its plane.

2. The construction specified in claim 1 wherein the last-named support comprises a stud and the slidable connecting means comprises a hook member fixed to the panel and loosely hooked around the stud.

3. The construction specified in claim 1 wherein the panel is made of metallic mesh, wherein the last-named support comprises a stud, and wherein the slidable connecting means comprises a sheet metal hook member fixed to. the mesh and loosely hooked around the stud.

4. A gas burner comprising an elongate burner head and'a generally flat heat-radiating panel mounted to extend laterally outward from the side of the head in position to be heated by the flames issuing from outlets in the side of the head, the panel being mounted by means comprising a support fixed to the panel at a location intermediate'its length and projecting inward from the inner edge of the panel to a connection with the head, supports for the ends of the panel fixed to the head and projecting laterally outward from the head, and means at the ends of the panel slidably connecting the panel and the last-named supports to allow thermal expansion and contraction of the panel in its plane.

5. The construction specified in claim 4 wherein the last-named supports are studs, and the slidable connecting means comprising hook members at the ends of the panel loosely hooked around the studs.

6. The construction specified in claim 4 wherein the panel is made of metallic mesh, wherein the last-named supports are screws threaded in the head, and wherein the slidable connecting means comprises sheet metal hook members fixed to the mesh and loosely hooked around the screws.

7. The construction specified in claim 6 wherein the panel has a brace extending along its outer edge and secured centrally to the panel, being free of the panel away from the center thereof and having its ends free of said hook members.

Great Britain May 6, 1939 Great Britain May 8, 1940