Electric lamps having outer stem surface which minimizes interna

Details Electric lamps having outer stem surface which minimizes interna Electric lamps having outer stem surface which minimizes interna

1985-10-15

1987-06-30

DeMeo, Palmer C.

Electric lamp and discharge devices

With temperature modifier

For lead-in-seal or stem protection

313116, 313623, 313634, H01J 538, H01J 6152, H01J 6136

Patent

active

046773380

ABSTRACT:
In a lamp having at least one seal of solid light-transmitting material, in which is embedded at least one current-supply foil, visible, I.R. and U.V. radiations which would otherwise be internally reflected from the seal surface are dispersed by providing on the seal either a non-uniform surface region or a light-dispersive coating, thus reducing the temperature of the outer ends of the foil and thereby reducing the risk of failure caused by oxidation. The seal may be formed with ribs or sand blasted or it may be provided with a coating of glass containing reflective particles or gas bubbles.

REFERENCES:
patent: 1599241 (1926-09-01), Mery
patent: 1846741 (1932-02-01), Linse
patent: 2706262 (1955-04-01), Barnes
patent: 3080497 (1963-03-01), Noel et al.
patent: 3515929 (1970-06-01), Kearney et al.
patent: 3991337 (1976-11-01), Notelteirs

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