Unsaturated high-pressure sodium lamp

Details Unsaturated high-pressure sodium lamp Unsaturated high-pressure sodium lamp

1989-02-10

1990-05-08

Yusko, Donald J.

Electric lamp and discharge devices

With gas or vapor

With particular gas or vapor

313549, 313562, 313642, 2521814, 2521817, 445 38, 445 41, 445 53, H01J 6122, H01J 6126

Patent

active

049241460

ABSTRACT:
The invention relates to an unsaturated high-pressure sodium lamp provided with a discharge vessel enclosing a discharge space, having a ceramic wall and closed at both ends by a leadthrough element to which an electrode is secured, and at least one electrode provided with emitter material. The fill material within the discharge vessel contains sodium, mercury and a rare gas. According to the invention, the discharge space also contains in metallic form one or more of the elements Mg, Ca, Sr and Ba up to at most 10% by weight of the mercury metered.

REFERENCES:
patent: 3433477 (1969-07-01), Hanneman et al.
patent: 3558963 (1971-01-01), Hanneman
patent: 4333032 (1982-06-01), Wyner et al.
patent: 4380714 (1983-04-01), Bouman et al.

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