Ceramic base for glass halogen lamps

Claim 1

A subminiature glass halogen incandescent lamp comprising: a subminiature hard glass envelope having a sealed end; an atmosphere within said envelope comprising a halide; refractory metal lead wires extending through said sealed end; a filament connected to the ends of said lead wires contained within said envelope; conductive wires joined one each to said lead wires at the ends extending from the sealed end of said envelope; a ceramic base having an inside diameter greater than the outside diameter of said envelope, said ceramic base surrounding the sealed end of said envelope and the joint between said conductive wires and the respective lead wires, said conductive wires extending from said base, said filament being located at a predetermined position with respect to said base; and an adhesive filling at least the ends of said base to enclose the volume between said base and said envelope thereby securely holding said envelope and filament in said predetermined position and protecting said joint from mechanical stress and corrosion.