Patent ID: 7332690
Filing Date: 2008-02-19
Classification: F23Q

Abstract:
1. An igniter comprising a tubular insulator member having a first end and a second end and having at least two spaced-apart bores therethrough, at least two rods each having a first end, a second end and an exterior surface and being formed from solid metallic material, each of said rods being received within one of said bores in said insulator member and being positioned therein so that a portion thereof having a substantially circular cross-section protrudes from said first end of said insulator member, said portion of at least one of said rods being bent outwardly with respect to said portion of said other rod forming a gap that increases in size in a direction transverse to the longitudinal axis of said insulator member extending from said first end of said insulator member to said first end of said rods, a high temperature wire strand having an outer diameter of about 0.004 inches to 0.030 inches and formed into a substantially straight coil of wire comprising at least two coil turns having a gap therebetween, said coil of wire terminating in a first end and an oppositely disposed second end of substantially straight wire, said first end and said oppositely disposed second end of said substantially straight wire being attached to the exterior surface of the portions of said rods protruding from said first end of said insulator member, the ratio of the overall length of said coil of wire to the overall outer diameter of said coil of wire being about 1.5:1 to 3.0:1, the ratio of said gap between adjacent coil turns of said coil of wire to said outer diameter of said high temperature wire strand forming said coil of wire being about 0.50:1 to 2.5:1, said high temperature wire strand being formed from an iron, chromium, aluminum alloy.