Jacketed discharge lamp having oxidizable fail-safe switch

摘要

A jacketed discharge lamp which would release ultraviolet radiation in the event of fracture of the outer envelope is provided with a disabling fuse link which oxidizes in the event of breakage. The link consists of an alkaline earth metal film, suitably a barium film which may be deposited on a ceramic substrate for connection into the circuit. The outer envelope is evacuated or may contain an inert gas.