Electric lamp having a strongly colored lamp envelope

Details Electric lamp having a strongly colored lamp envelope Electric lamp having a strongly colored lamp envelope

1984-01-25

1986-12-30

Hunter, Jeanette

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

313116, 313113, 313635, H01K 132, H01J 516

Patent

active

046331271

ABSTRACT:
The lamp envelope of the electric lamp is coated at the inner surface with an electrostatically applied light-scattering pigmented powder layer. The powder layer comprises at least a cadmium-containing pigment and further a cadmium-free pigment for example in approximately equal part by weight. Although cadmium-free pigments alone cannot give lamps the desired color properties, it has been found that they are capable of replacing cadmium-containing pigments in the powder layer up to a high percentage by weight.

REFERENCES:
patent: 2995463 (1961-08-01), Meister et al.
patent: 3125457 (1964-03-01), Meister
patent: 3320460 (1967-05-01), Bouchard et al.
patent: 4081709 (1978-03-01), Collins et al.
patent: 4099080 (1978-07-01), Dawson
patent: 4395653 (1983-07-01), Graff
patent: 4441046 (1984-04-01), James
patent: 4441047 (1984-04-01), Collins
patent: 4499397 (1985-02-01), James

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