Electric discharge lamp with thermal switch.

摘要

An electric discharge lamp has an arc tube within an outer gas filled glass envelope and a thermal switching means (47) is located within the outer envelope. The thermal switching means has a silica support (53) with a pair of electrical conductors affixed (51, 55) thereto and a bimetal strip (57) and a spring-like member (61) are affixed to at least one of the electrical conductors, whereby upon application of heat the bimetal strip (57) and spring-like member (61) are flexed to short-circuit the electrical conductors and remove any D.C. potential between the main electrode and the starting electrode minimizing electrolysis.