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:
Dec. 27, 1977
Filed:
Dec. 06, 1976
Applicant:
Inventor:
Charles I McVey, Shaker Heights, OH (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H01J / ; H01J / ;
U.S. Cl.
CPC ...
313174 ; 313217 ; 313220 ; 313229 ;
Abstract
A high pressure alkali metal vapor lamp envelope of alumina ceramic has an end closure which includes an externally projecting thin-walled metal tube serving as in inlead and as a reservoir for excess alkali metal. An electrode is mounted on a tungsten shank which projects into the metal tube and is locked in place by crimping the tube about it externally of the envelope. The crimping leaves restricted channels which allow passage of the alkali in vapor form but prevent its movement as a liquid.