Abstract: A fuel burner comprises a body having walls defining a chamber open at one end and accommodated in a conduit through which air may be delivered to the burner. Two opposed walls of the chamber are apertured to accommodate nozzles through which atomized fuel may be discharged in streams which impinge upon each other between the ends of the chamber. At the closed end of the chamber are gaps through which air may enter the chamber and pass out the open end of the latter. Adjacent the open end of the chamber are additional nozzles through which atomized fuel may be discharged. Air for atomization of the fuel is delivered from the air conduit and passes through passages in the nozzles. Each nozzle has a transverse passageway to which fuel is supplied, which fuel is entrained in air passing through the nozzle passages. A spark generating device is positioned within the chamber to ignite atomized fuel.

Abstract: A fuel burner diffuser comprises a frustoconical support fitted at its smaller diameter end to a fuel burner nozzle from which fuel is emitted in a conical stream. A plurality of series of gas jets are carried by and spiral about the support for introducing combustion-supporting gas into the fuel stream. The jets are mounted on the support in such manner that gas passing through the jets is substantially perpendicular to the longitudinal axis of the fuel stream so as to facilitate penetration of the fuel stream by the gas. Those jets which are substantially diametrically opposed to one another are circumferentially offset so as to avoid diametrical confrontation for the purpose of promoting better mixing of the fuel and gas. The cross sectional areas of the jets increase in a direction away from the fuel burner to enable a greater quantity of gas to be supplied to the fuel as the cross sectional area of the fuel stream increases.