Incandescent lamps

Details Incandescent lamps Incandescent lamps

1984-08-02

1987-12-01

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

313579, 313116, H01K 126

Patent

active

047106778

ABSTRACT:
An incandescent lamp, which emits infra-red radiation, comprises a tubular quartz envelope, within which a tungsten filament is supported. To reflect radiation, which is emitted in a downward direction from the filament, back in an upward direction to an item to be heated, a substantially pure aluminum oxide coating is bonded in a substantially permanent manner to the surface of the envelope. The coating extends subtantially along the length of the lamp and around approximately half of the cross-sectional circumference thereof. The coating is applied to the envelope by a spray gun technique, wherein finely divided aluminum powder is blown through an oxygenated flame, which is directed towards an area of the envelope to be coated.

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patent: 2158561 (1939-05-01), Biggs
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patent: 2509071 (1950-05-01), Pennybacker
patent: 2775718 (1956-12-01), Dubilier
patent: 3536946 (1970-10-01), Kopelman et al.
patent: 3842306 (1974-10-01), Henderson et al.
patent: 3931536 (1976-01-01), Fohl et al.
patent: 4079288 (1978-03-01), Maloney et al.

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