GB1526042A - Gas burner - Google Patents

Abstract

1526042 Gas burners VALOR NEWHOME Ltd 1 Sept 1975 [31 Aug 1974] 38144/74 Heading F4T A gas burner comprises a housing formed of upper and lower parts 42, 44 defining chambers (58), (56), Figs. 6, 8 (not shown), the parts being secured together with the chambers in communication, and generally cylindrical intermediate wall co-operating with the housing to define an annular gas flow path 66 terminating at one end in a gas outlet where the gas is combusted, the wall having an outwardly-inclined portion 72 at said one end forming a wall of said outlet, an igniter, such as pilot burner 38, being positioned within a passage for combustion air which is defined within the cylindrical wall. The wall is formed by a fixed portion 46 and a removable cup 48 on which the inclined portion 72 is formed, and the gas outlet is further defined by a series of castellations in inwardly inclined rim 78 of housing part 42, on which the cup 48 seats. A cast metal burner cap 80 may seat on the inclined part 72; alternatively, Fig. 13 (not shown), a sheet metal canopy (114) may be supported by legs (118) welded to the cup 48. The upper chamber (58) is circular in plan while the lower chamber 56 is pear-shaped, and an inlet 22 or 24 for gas (injected by valves 14 or 12) and primary air (induced by such injection) opens into the radial extension of this chamber so that the gas flow is generally tangential of the annular gas flow passage. Means may be provided for adjusting the quantity of induced primary air. Secondary air is drawn in through openings 62, 64, 76 in housing part 44, cylindrical member 46 and cup 48. Gas-air mixture may flow through apertures in the cup and flow around lighting plate 104 to be ignited by pilot burner jet 94; alternatively, Figs. 14, 15 (not shown), a spark igniter (130) may be provided.