Metal halide lamps

Details Metal halide lamps Metal halide lamps

1975-11-06

1977-05-17

Krawczewicz, Stanley T.

Electric lamp and discharge devices

Liquid electrode discharge devices

Auxiliary starting or holding electrode

313178, 313179, 313225, 313229, H01K 152

Patent

active

040244253

ABSTRACT:
A metal halide lamp comprising a luminous sealed tube, a pair of electrodes housed in the luminous tube and rare gas, mercury and metal halide sealed in the luminous tube, characterized in that boron or a boron compound is sealed in the luminous sealed tube in such a manner as not to contact the surfaces of the electrodes. The metal halide lamp is advantageous in that the electrodes are prevented from corrosion and that the blackening with time of the inner wall of the luminous tube is suppressed.

REFERENCES:
patent: 2116689 (1938-05-01), Rompe
patent: 3582703 (1971-06-01), Takahashi et al.
patent: 3849687 (1974-11-01), Huston

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