Ceramic seal for high pressure sodium vapor lamps

Details Ceramic seal for high pressure sodium vapor lamps Ceramic seal for high pressure sodium vapor lamps

1982-07-26

1984-08-07

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

313623, H01J 6136

Patent

active

044646038

ABSTRACT:
An improved end closure for a tubular light-transmitting ceramic envelope used in sodium vapor lamps is disclosed which comprises assembly of a ceramic disc fitted into one end of a metal sleeve having a different diameter opening at its opposite end for circumferential engagement with the arc tube inserted therein with all of the assembled members being hermetically sealed together by a ceramic sealing frit. The improved end closure permits thermionic electrodes to be inserted through openings in the ceramic discs with said electrodes being hermetically sealed at said openings with additional ceramic sealing frit.

REFERENCES:
patent: 3832588 (1974-08-01), McVey et al.
patent: 4034252 (1977-07-01), McVey
patent: 4065691 (1977-12-01), McVey
patent: 4160186 (1979-07-01), Kerekes

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