Metal vapor discharge lamp filled with bismuth, mercury, a rare

Details Metal vapor discharge lamp filled with bismuth, mercury, a rare Metal vapor discharge lamp filled with bismuth, mercury, a rare

1991-01-02

1992-04-21

Yusko, Donald J.

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

313638, H01J 1720

Patent

active

051071789

ABSTRACT:
A metal vapor discharge lamp comprises a light-emitting tube filled with bismuth together with mercury, a rare gas, iron and a halogen in the range of 1/20-6/1 in terms of the gram atom ratio of bismuth to iron (Bi/Fe). A metal vapor discharge lamp also comprises a long light-emitting tube having an inner diameter D of 18-35 mm, equipped with a pair of electrodes and having an electrode interval L of 750 mm or greater, filled with bismuth together with mercury in a sealed amount of 0.6-2.0 mg per cc of the internal volume of the light-emitting tube, a rare gas, iron and a halogen in the range of 1/20-6/1 in terms of the gram atom ratio of bismuth to iron (Bi/Fe).

REFERENCES:
patent: 3761758 (1973-09-01), Bamberg et al.
patent: 4157485 (1979-01-01), Wesselink et al.
patent: 4769576 (1988-09-01), Ohyama et al.

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