Abstract: An oil burner having an atomizing nozzle receptive of a supply of oil through an oil tube therein and receptive of a supply of air under pressure through an air tube therein for atomizing the oil, includes an oil shut-off valve device which is responsive to the pressure of the air in the air tube for normally preventing the passage of oil from the oil tube to the nozzle until the air pressure rises above a given value and for shutting off the passage of oil from the oil tube to the nozzle when the air pressure falls below a given value.

Abstract: A furnace firing system including a furnace port, a burner including a nozzle at one end received in the port and a mounting for the burner to position the nozzle in the port at a desired firing angle. The burner comprises an elongated body having a frustoconical locating member fixedly mounted therearound adjacent the other end of the burner and tapering towards the one end. The mounting is connected to the burner solely at the locating members via a receiving member having the inner surface thereof configured to closely receive the locating member. The locating member is releasably retained in the receiving member and the burner is pivoted about a pivot axis disposed between the locating member and the nozzle and substantially adjacent the nozzle by a pivot arm extending between the pivot axis and the receiving member and connected to the receiving member at one end.