Incandescent lamp with improved coating and method

Details Incandescent lamp with improved coating and method Incandescent lamp with improved coating and method

1977-03-31

1978-07-04

Newsome, John H.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Light diffusing

427 28, 427 29, 427106, H01K 132, B05D 306

Patent

active

040990800

ABSTRACT:
This invention relates to an incandescent lamp having an improved light diffusing coating carried on the internal surface of the lamp envelope and a method for applying the coating. The coating is a mixture of very finely divided, very low-moisture content powders. The powders substantially comprise a mixture of hydrophilic silica and hydrophobic silica. This coating has been found to be very adherent and substantially free from agglomerations of the silica.

REFERENCES:
patent: 2545896 (1951-03-01), Pipkin
patent: 2661438 (1953-12-01), Shand
patent: 2888354 (1959-05-01), Smith et al.
patent: 2921827 (1960-01-01), Meister et al.
patent: 2922065 (1960-01-01), Meister et al.
patent: 2963611 (1960-12-01), Meister et al.
patent: 2988458 (1961-06-01), Meister et al.
patent: 3125457 (1964-03-01), Meister
patent: 3961600 (1976-06-01), Homer et al.

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