SUPPORT FRAME FOR A DISCHARGE VESSEL IN A DOUBLE-WALL HID LAMP

摘要

An HID lamp utilizes a wire frame member (40) having an integral coil (46) with spaces between windings to relieve thermal stress and provide shock absorption in a ceramic metal halide discharge lamp (30) mounted concentrically in an elliptical-dimple (ED-type) glass envelope (20). The wire frame member has a first end (42) welded to a current carrying support member (18) embedded in the stem (14) and a second end (52) welded to an upper axial lead (38) of the arc tube, the coil being situated about the dimple (24). The lower axial lead (39) fixed relative to a second current carrying support member (19) embedded in the stem, so that the coil compresses when the arc tube expands relative to the wire frame member.