Low-pressure sodium discharge lamp having sealed current conduct

Details Low-pressure sodium discharge lamp having sealed current conduct Low-pressure sodium discharge lamp having sealed current conduct

1994-04-28

1996-03-12

O'Shea, Sandra L.

Electric lamp and discharge devices

With gas or vapor

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

313624, 313626, H01J 1718

Patent

active

054989272

ABSTRACT:
In the low-pressure sodium discharge lamp the current conductors (3) have a first (4) and a second glass coating (6). The first coating (5) of borate glass extends from inside the discharge vessel (1) through a pinch seal (4). The second coating (6) of lime glass envelopes the first one (5) within the pinch seal (4) and extends to outside the discharge vessel (4). The occurrence of cracks in the pinch seal is thereby obviated.

REFERENCES:
patent: 3742283 (1973-06-01), Loughridge
patent: 4691142 (1987-09-01), Dohmen
patent: 4783612 (1988-11-01), Sprengers

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