Patent ID: 6345979
Filing Date: 2002-02-12
Classification: F23D,F23Q

Abstract:
A burner comprisingan oxygen conduit formed to include an oxygen inlet, an oxygen outlet, and an oxygen passageway extending between the oxygen inlet and oxygen outlet and including a combustion zone therein at the oxygen outlet, a spark generator including a fuel conduit formed to include a fuel inlet, a fuel outlet, and a fuel passageway extending between the fuel inlet and outlet to communicate fuel to the combustion zone to mix with oxygen extant therein, the spark generator further including an electrical current provider coupled to the fuel conduit to establish a flow of electrical current through the fuel conduit and a ground pin attached to the oxygen conduit and positioned to lie in the combustion zone established within the oxygen passageway and in a spaced-apart distance upstream of the oxygen outlet to cause an electrical arc to form in the combustion zone between the fuel conduit and the ground pin to create a spark and ignite a combustible mixture of oxygen and fuel extant in the combustion zone, and further comprising a sleeve mounted for movement relative to the fuel conduit and formed to include a central opening receiving the fuel conduit therein and wherein the fuel conduit is formed to include a pin-receiving slot communicating with the fuel outlet and the ground pin is coupled to the sleeve and arranged to move back and forth in the slot during movement of the sleeve relative to the fuel conduit to vary a spark gap distance between the fuel outlet and the ground pin in the combustion zone.