Patent GB-900440-A (GB)
Title: Improvements in or relating to gas burners
IPC: F23D14/06
Filed: 1961-01-26
Abstract: 900,440. Gas burners. WHIRLPOOL CORPORATION. Jan. 26, 1961 [April 29, 1960], No. 3156/61. Classes 75 (1) and 75 (3). A gas burner comprises a burner head 16 having an opening 22 discharging an auxiliary supply of gas/air mixture away from the longitudinal axis of the burner, a series of openings 23 discharging a main supply of gas/air mixture in the same direction and a secondary air discharge opening 36. The head comprises an outer cylindrical wall 17, an inner wall 18, a central air tube 19, a funnel-shaped plate 24 attached to the top of the air tube 19 and a topplate 35 mounted on a spider 33 extending across the central part of the funnel-shaped plate 24. The opening 22 for the auxiliary gas/ air mixture is formed between a flange 21 at the upper end of the outer wall 17 and a flange at the upper end of the inner wall 18 and the openings 23 for the main gas/air mixture are formed by the outer edge of the funnel-shaped plate 24 overlying the open tops of ports formed in the flange at the upper end of the inner wall 18; the secondary air opening 36 is formed between the funnel-shaped plate 24 and the top plate 35. The burner head 16 is positioned on a burner base 37 having an inlet 49 for a pipe 48 supplying gas/air mixture and an inlet for a pipe 52 supplying air under pressure. The gas/air mixture passes to the main openings 23 through an annular opening 39 between the inner edge of the top wall 38 of the base and the air tube 19 and to the auxiliary opening 22 through a circular row of holes 42 in the top wall 38 of the base. The base is sealed by a rubber seal 15 in an aperture in the top 10 of a gas range. The left-hand side of the inner wall 18 is recessed inwardly and is joined by side-walls to a portion 29a of the outer wall 17 to form a passage 30 supplied with gas/air mixture through a hole 41 in the top wall 38 of the base and through adjacent holes 42. This mixture passes through holes 31a in the wall 29a and through holes 31 in an aligned wall 29 and is ignited by a pilot burner 58. A hood 63 depends from the outer wall 17 and covers the pilot burner 58 and has an aperture 65 adjacent the holes 31 in the wall 29. A sensor control for control of the burner flame may be mounted within the air tube 19, Fig. 6 (not shown), and comprises a spring-loaded sensor adapted to contact the bottom of a cooking vessel supported on a grate 66. In a modification, Fig. 7 (not shown), the pilot burner is located below the range top 10 and a shield is disposed between the pilot flame and the range top. An air passage is formed between the range top and the outer wall of the burner. In another modification, Fig. 8 (not shown), the pilot flame emanates from the top of a passage formed in the base of the burner and a drip pan is provided. In the modification shown in Fig. 9 the burner base is closed by a closure 115 having an upwardly-extending tubular part 116, a radially-extending pipe-section 119 and a half-tube co-operating with a half-tube on the burner base to form a tubular projection 111 having annular projections 112. A rubber seal 114 is located between the gas/air pipe 113 and the tubular projection 111. The pilot burner supply passage is formed in a block formed integrally with the burner base. The closure 117 for the central air tube and the deflector plate 130 may be removed to convert the burner into one in which the secondary air is at atmospheric pressure.