Igniter plug

Details Igniter plug Igniter plug

F - Mech Eng,Light,Heat,Weapons

02

P

123/215

F02P 15/00 (2006.01) F23Q 3/00 (2006.01) H01T 13/20 (2006.01) H01T 13/46 (2006.01) H01T 21/02 (2006.01)

Patent

CA 1158499

ABSTRACT OF THE DISCLOSURE The specification describes an igniter for igniting combustible materials and more particularly to an improved igniter plug for igniting fuel in a turbine or jet engine. The igniter plug is of the type having an inner elongated electrode having a front portion and a rear portion with an elongated insulator disposed around at least a portion of the electrode. The insulator has a front portion, a rear portion and an axial passage extending therethrough. The igniter also comprises an outer elongated metal shell disposed around the electrode and electrically isolated therefrom by the insulator. The metal shell has a rear portion and a front end portion which is arranged to provide a spark gap with the end of the front portion of the electrode. Means are provided for creating a pressure-tight seal between the inner electrode, the elongated insulator and the metal shell. The improvement comprises a metal sleeve telescopically mounted to the inner electrode in the front portion of the insulator passage wherein the metal sleeve comprises a single piece of metal having large and small diameter portions connected together by a third portion. The inside diameter of the smaller portion is in contact with the electrode extending therethrough and the outside surface of the larger diameter portion is in contact with the insulator passage.

368198

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