Tungsten halogen lamp including phosphorous and bromine

Details Tungsten halogen lamp including phosphorous and bromine Tungsten halogen lamp including phosphorous and bromine

1989-09-26

1991-07-23

DeMeo, Palmer C.

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

H01K 150

Patent

active

050346563

ABSTRACT:
Tungsten-halogen lamps operating at temperatures above 250.degree. C. which contain a mixture of phosphine, hydrogen, bromine and inert gas have been found to have superior life and lumen maintenance when the atomic ratio of phosphorus to bromine in the lamp is in the range of from 0.4-2.5.

REFERENCES:
patent: 3712701 (1973-01-01), Johnston et al.
patent: 3800180 (1974-03-01), De Fraeye et al.
patent: 4629935 (1986-12-01), Keenan
patent: 4629936 (1986-12-01), Weld et al.
patent: 4727286 (1988-02-01), Keenan et al.
patent: 4748376 (1988-05-01), Weld et al.
"Designers Handbook, Light Source Applications" by J. F. Waymouth et al., GTE Products Corp., 12/1980, pp. 15 and 16.

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