Explosion proof high pressure discharge lamp

Details Explosion proof high pressure discharge lamp Explosion proof high pressure discharge lamp

1989-12-28

1991-06-11

Yusko, Donald J.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313623, 313624, 313625, 313634, 362377, 362378, H01J 6134, H01J 1728, H01J 1734

Patent

active

050235060

ABSTRACT:
A high pressure metal halide discharge lamp having a containment sleeve closed by a pair of metallic end caps for containing arc tube fragments in the event of explosive failure of the arc tube. Insulators secured in the end caps electrically insulate the arc tube lead-throughs from the end caps. Metallic tubes fixed on the lead-throughs butt against the insulators to secure the arc tube between the end caps and hold the end caps against the containment sleeve. Photoelectric emission from the end caps is avoided by electrically isolating the end caps or by providing a dielectric coating on end cap surfaces exposed to ultraviolet radiation.

REFERENCES:
patent: 4281274 (1981-07-01), Bechard et al.
patent: 4539510 (1985-09-01), Bouchard
patent: 4625140 (1986-11-01), Gragnon
patent: 4721876 (1988-01-01), White et al.
patent: 4866328 (1989-09-01), Ramaiah et al.
patent: 4950938 (1990-08-01), Ramaiyah

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