Abstract: A gun-type fluid fuel burner having a blast tube with a fuel dispensing nozzle therein includes a blower housing having a scroll side wall and opposite end walls. The housing side wall has an upwardly facing air discharge opening therein which communicates with the blast tube, and one of the end walls has an air inlet opening therein. A squirrel cage blower wheel having a diameter more than twice its width is mounted for rotation in the housing and is directly driven by a two pole single phase alternating current motor mounted on one of the housing end walls, the blower drawing air through the input opening and discharging the air under pressure through the discharge opening. A damper plate is mounted on the housing for movement between an open position and a position closing the discharge opening, the damper being moved to its open position in response to air pressure from the blower and returning to its closed position under the influence of biasing force.

Abstract: A power gas burner includes a plenum having front and rear walls and a side wall. A blast tube is connected to the front wall communicating with the plenum. A blower has its discharge connected to the plenum. An air-gas mixing tube is disposed in the blast tube with its discharge adjacent the distal end thereof and its inlet extending into the plenum, the mixing tube defining a secondary air passage with the blast tube. The mixing tube has an air-admitting opening adjacent its inlet communicating with the plenum. A gas line extends into the inlet of the mixing tube. A spider supports the discharge of the mixing tube and has legs engaging the distal end of the blast tube. A flame spreader disc is spaced from the discharge of the mixing tube, the diameter of the disc being generally equal to the diameter of the mixing tube at its discharge.

Abstract: A gun-type burner including a housing having side and end walls defining a plenum chamber. A blast tube is mounted on one end wall of the housing which has an opening therein communicating between the plenum chamber and the blast tube. A fuel nozzle and ignition electrodes are positioned in the blast tube and extend into the plenum chamber. A squirrel cage blower is provided including a scroll casing with an air discharge end mounted on a side wall of the housing which has an opening therein communicating between the plenum chamber and the air discharge end of the casing. A shaded pole motor is mounted on the casing and is operatively connected to drive the blower. An electrically operated fuel pump is mounted on the housing, and an ignition transformer or solid-state ignitor is also mounted on the housing and has secondary terminals which extend into the plenum chamber and are connected to the ignition electrodes.