Candoluminescent electric light source

Details Candoluminescent electric light source Candoluminescent electric light source

1983-04-29

1985-09-03

Chatmon, Saxfield

Electric lamp and discharge devices

Incandescent lamps

313345, 313491, 315112, H01K 132

Patent

active

045395055

ABSTRACT:
An electric lamp has a candoluminescent filament. The filament has a resistive core which is heated electrically. Infrared radiation emitted by the resistive core is converted to visible light by a sheath of candoluminescent material surrounding the resistive core. The filament may be a sintered composition of carbon, ceric oxide and thorium dioxide. Carbon proximate to the surface of the filament is removed by oxidation, leaving a closed pore structure of candoluminescent material.

REFERENCES:
patent: 616276 (1898-12-01), Thowless
patent: 844778 (1907-02-01), Cazin
patent: 929280 (1909-07-01), Broadwell et al.
patent: 1023485 (1912-04-01), Thowless
patent: 1406645 (1922-02-01), Heany
patent: 3973155 (1976-08-01), Warren et al.
patent: 4016446 (1977-04-01), Cadoff

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