Metal halide lamp

Details Metal halide lamp Metal halide lamp

1986-02-04

1989-02-28

Moore, David K.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313573, 313623, 313634, 313635, 313640, 313641, H01J 6130, H01J 6134

Patent

active

048088765

ABSTRACT:
A metal halide discharge lamp includes an arc tube design having a particular end shape which allows control of the temperature distribution within the arc tube, so that sensitivity of the arc tube performance to orientation is reduced and concentration of the metallic halide components in the arc region is maintained relatively constant. The shaping of the arc tube ends and the use of a low thermal emissivity coating on the arc tube allows maintenance of the metallic halide in the vapor state at a constant level to promote better lumen maintenance and color rendering in a metal halide discharge lamp.

REFERENCES:
patent: 2879449 (1959-03-01), Macksound
patent: 2966600 (1960-12-01), Strauss
patent: 3234421 (1966-02-01), Reiling
patent: 3900750 (1975-08-01), Bamberg et al.
patent: 3937996 (1976-02-01), Cap
patent: 4029983 (1977-06-01), Thornton
patent: 4161672 (1979-07-01), Cap et al.
patent: 4323812 (1982-04-01), Wyner et al.
patent: 4387319 (1983-06-01), White et al.
patent: 4396857 (1983-08-01), Danko

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