The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 1989
Filed:
Apr. 14, 1988
Applicant:
Inventor:
Katsuya Otani, Kanagawa, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313 25 ; 313642 ; 315117 ;
Abstract
An alkali metal vapor discharge lamp is operable in a pulsed mode. The vapor discharge lamp includes an inner envelope made of first ceramics and an outer envelope made of second ceramics for enclosing the inner envelope under a vacuum atmosphere or an innert atmosphere. The inner envelope contains cesium, mercury and a rare gas, the vapor pressure of which cesium is selected from 400 to 1000 Torr. The second ceramics of the outer envelope is selected to be alumina ceramics.