Tungsten halogen lamp with halogen-containing compound and...

Details Tungsten halogen lamp with halogen-containing compound and... Tungsten halogen lamp with halogen-containing compound and...

2005-10-18

2005-10-18

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

C313S579000, C313S548000, C313S557000

Reexamination Certificate

active

06956328

ABSTRACT:
A tungsten halogen lamp (10) includes a light transmissive envelope (12), which encloses a tungsten filament (14) and a gaseous fill comprising an inert gas and a halogen-containing gas, such as an alkyl halide. In addition the fill includes a silicon-containing compound capable of gettering oxygen within the envelope. The atomic ratio of silicon to halogen in the envelope is selected so as to remove most, but not all of the oxygen present in the envelope A silicon:halogen ratio of less than about 0.5 more preferably, below about 0.4 has been found to be effective in this respect.

REFERENCES:
patent: 1944825 (1934-01-01), Millner
patent: 4898558 (1990-02-01), Shaffer
patent: 4923424 (1990-05-01), Shaffer
patent: 5034656 (1991-07-01), Yu et al.
patent: 5109182 (1992-04-01), Laszlo
patent: EU00328065 (1989-08-01), None

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