Protective coatings for light sources

Details Protective coatings for light sources Protective coatings for light sources

1978-12-22

1980-09-16

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

313110, 313 54, 315 39, 315344, H05B 4116, H05B 4124

Patent

active

042232503

ABSTRACT:
A metallic coating is disposed on the inner surface of a lamp having an envelope made of a light transmitting substance enclosing a fill material which emits light upon breakdown and excitation by a high frequency power source. The metallic coating protects the lamp envelope from degradation caused by the lamp fill material or by products of the discharge and acts as a catalyst for the recombination reaction of molecular lamp fill material. A nickel coating is used in a deuterium discharge lamp. Another suitable metal is gold. The metallic coating is sufficiently thin to permit high frequency power to pass through the coating.

REFERENCES:
patent: 3005102 (1961-10-01), MacHutchin et al.
patent: 3109960 (1963-11-01), Bell et al.
patent: 3648100 (1972-03-01), Goldie et al.
patent: 3705319 (1972-12-01), Goldie et al.
patent: 3928781 (1975-12-01), Edwards et al.
patent: 4010400 (1977-03-01), Hollister
patent: 4117378 (1978-09-01), Glascock, Jr.
patent: 4119889 (1978-10-01), Hollister

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