Patent ID: 7164232
Filing Date: 2007-01-16
Classification: H01J

Abstract:
1. An arc discharge metal halide lamp for use in selected lighting fixtures, said lamp comprising: a discharge chamber having visible light permeable walls of a selected shape bounding a discharge region through which walls a pair of electrode assemblies are supported with interior ends thereof positioned in said discharge region spaced apart from one another, and with said electrode assemblies each also extending through a corresponding capillary tube affixed to said walls to have exterior ends of said electrode assemblies positioned outside said arc discharge chamber; and at least one of said electrode assemblies comprising an electrode discharge structure located at said interior end of that said electrode assembly with said electrode discharge structure having a discharge region shaft extending into said capillary tube corresponding thereto, and further comprising said discharge region shaft extending outwardly in said corresponding capillary tube to be in electrical contact with an interconnection shaft having a portion thereof extending outside and past an exterior end of said corresponding capillary tube to provide said exterior end of that said electrode assembly; and a sealing cap provided outside and about said exterior end of said corresponding capillary tube, so as to cover an opening portion and an end portion of an exterior longitudinal surface of said corresponding capillary tube, about its circumference, and provided so as to be in direct contact with said interconnection shaft.