Abstract: A cooking-type elongate bar burner having a plurality of gas flow apertures and a top surface is defined in part by a stiffening ridge and by a pair of laterally extending flanges. The apertures are beneath the flanges and thereby substantially protected from grease clogging. The burner is roll formed of a single piece of sheet material and is configured to directly accept a gas flow control valve. Also a unique "intra-burner" cross-over ignition arrangement and a method for making the new burner by roll forming are described.
Abstract: The improved fuel-air mixer tube is devoid of secondary air ports and includes a passage for flowing gaseous fuel to a burner and a restrictor accelerating such gaseous fuel through a region of maximum gas velocity. An air entry port is in flow communication with such region for supplying primary air required to form a combustible mixture. The tube is thereby naturally aspirated and gaseous fuel and air are turbulently mixed to form a substantially homogeneous mixture.