High-pressure sodium lamp

Details High-pressure sodium lamp High-pressure sodium lamp

H - Electricity

01

J

313/10, 313/132

H01J 61/36 (2006.01) H01J 61/30 (2006.01)

Patent

CA 1162223

ABSTRACT OF THE DISCLOSURE A high-pressure sodium lamp in which the ends of an arc tube which is made of transparent single-crystal alumina and which contains sodium are sealed with feed-throughs each having an electrode extended from the inner end thereof. Each feed through is directly sealed to the inner wall surface of each end of the arc tube. In addition, each feed-through is formed with an enlarged-diameter portion which is directly sealed to the inner wall surface at each end of the arc tube and a reduced-diameter portion which is spaced apart from the inner wall surface at each end of the arc tube.

379839

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