Lamp having silica protective coating

Details Lamp having silica protective coating Lamp having silica protective coating

1994-09-13

1996-07-16

O'Shea, Sandra L.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Reflector

313580, 313635, H01J 516

Patent

active

055369910

ABSTRACT:
An electric lamp, such as an incandescent linear quartz heat lamp, is provided having a vitreous light transmissive envelope having an exterior surface and a light source capable of generating light within said envelope. Disposed on a portion of the exterior surface of the envelope is a diffuse reflective coating, such as a boron nitride coating, for reflecting at least a portion of the light emitted by the source. A protective silica coating encapsulates the reflective coating to protect the reflective coating from things such as abrasion, moisture, and cleaning solvents.

REFERENCES:
patent: 3959563 (1976-05-01), Vaughn, Jr. et al.
patent: 4339686 (1982-07-01), Potter
patent: 4942065 (1990-07-01), Factor et al.
patent: 5168193 (1992-12-01), Hoegler
patent: 5276763 (1994-01-01), Gobel et al.

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