Metal halide lamp

Details Metal halide lamp Metal halide lamp

1989-06-06

1991-06-04

O'Shea, Sandra L.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313571, 313639, H01J 6112, H01J 6120

Patent

active

050217038

ABSTRACT:
A metal halide high intensity discharge lamp including a carbon monoxide additive in the arc tube fill to improve lumen maintenance is provided. The metal halide discharge lamp of the present invention comprises: an outer sealed glass envelope; a pair of electrical conductors sealed into and passing through the glass envelope; an arc tube disposed within the outer glass envelope, the arc tube including a pair of spaced electrodes therein with the electrodes being electrically connected to the electrical conductors such that one electrode is electrically connected to one electrical conductor; a chemical fill disposed within the arc tube, the chemical fill comprising mercury, metal halide additives, carbon monoxide, and a starting gas; and a support structure disposed within the outer glass envelope to support the arc tube therein.

REFERENCES:
patent: 2103038 (1937-12-01), Moers
patent: 3364376 (1968-01-01), Collins et al.
patent: 3728572 (1973-04-01), Maier et al.
patent: 4163171 (1979-07-01), Wurster
patent: 4171498 (1979-10-01), Fromm et al.
patent: 4620125 (1986-10-01), Keeffe et al.
patent: 4625141 (1986-11-01), Keeffe et al.
patent: 4709184 (1987-11-01), Keeffe et al.
patent: 4791334 (1988-12-01), Keeffe et al.

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