Incandescent tungsten-halogen gas-filled infrared lamps

Details Incandescent tungsten-halogen gas-filled infrared lamps Incandescent tungsten-halogen gas-filled infrared lamps

H - Electricity

01

K

316/20, 313/172.

H01K 1/32 (2006.01) H01J 9/20 (2006.01) H01J 61/35 (2006.01)

Patent

CA 1224838

ABSTRACT OF THE DISCLOSURE 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 aluminium oxide coating is bonded in a substantially permanent manner to the surface of the envelope. The coating extends substantially 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 aluminium powder is blown through an oxygenated flame, which is directed towards an area of the envelope to be coated.

459830

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