Ceramic lamp having electrodes supported by crimped tubular inle

Details Ceramic lamp having electrodes supported by crimped tubular inle Ceramic lamp having electrodes supported by crimped tubular inle

1976-12-06

1977-12-27

Demeo, Palmer C.

Electric lamp and discharge devices

Liquid electrode discharge devices

Auxiliary starting or holding electrode

313217, 313220, 313229, H01J 6122, H01J 6128, H01J 6130, H01J 6136

Patent

active

040656918

ABSTRACT:
A high pressure alkali metal vapor lamp envelope of alumina ceramic has an end closure which includes an externally projecting thin-walled metal tube serving as in inlead and as a reservoir for excess alkali metal. An electrode is mounted on a tungsten shank which projects into the metal tube and is locked in place by crimping the tube about it externally of the envelope. The crimping leaves restricted channels which allow passage of the alkali in vapor form but prevent its movement as a liquid.

REFERENCES:
patent: 3825788 (1974-07-01), Pfaue et al.
patent: 3886392 (1975-05-01), Barakitis et al.
patent: 3906273 (1975-09-01), Kozlowski
patent: 3911313 (1975-10-01), Makar, Jr.
patent: 3974410 (1976-08-01), Collins et al.

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