Tungsten-halogen lamp with means for reducing filament embrittle

Details Tungsten-halogen lamp with means for reducing filament embrittle Tungsten-halogen lamp with means for reducing filament embrittle

1985-02-11

1986-12-16

DeMeo, Palmer C.

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

H01K 150, H01K 154

Patent

active

046299360

ABSTRACT:
A tungsten-halogen lamp is provided that incorporates therein means for substantially reducing filament embrittlement. The embrittlement reducing means comprises substances X and Y, which have an X and Y mass ratio of about 30:1. Substance X is a phosphorus-based gaseous compound and substance Y is a carbon-containing gaseous compound. Substance X is preferably phosphine and substance Y is preferably methyl bromide.

REFERENCES:
patent: 1600203 (1926-09-01), Campbell
patent: 3538373 (1970-11-01), Linden et al.
patent: 3712701 (1973-01-01), Johnston et al.
patent: 3912960 (1975-10-01), Danko
patent: 3912961 (1975-10-01), Rees et al.
patent: 4039879 (1977-08-01), T'jampens et al.
patent: 4532455 (1985-07-01), Connor et al.

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