Patent ID: 8581149
Filing Date: 2013-11-12
Classification: B22C,B23K

Abstract:
1. An igniter for igniting a particulate exothermic weld metal, comprising: a pair of flat, longitudinally extending upper and lower electrical conductor strips, the upper conductor strip being shorter and narrower in width than the bottom conductor strip whereby the upper conductor strip terminates in a first projection and the bottom conductor strip terminates in a positioning tab, a sheet of insulation laminated between said electrical conductor strips to insulate said electrical conductor strips from each other; and an ignition element comprising a filament connecting said first projection of the upper conductor strip and a second projection from the bottom conductor strip, said filament being formed of a material which heats substantially when electricity is passed therethrough to a temperature sufficient to ignite the exothermic weld metal, said electrical conductor strips being adapted to be coupled to a source of electrical power sufficient to cause said filament to heat to ignite the particulate exothermic weld metal.