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:
Jan. 10, 1978
Filed:
Dec. 20, 1976
Applicant:
Inventors:
Seiichi Nakagawa, Akishima, JA;
Youichi Shibuki, Akishima, JA;
Assignee:
Nihon Denshi Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313237 ; 313311 ; 313336 ; 313341 ;
Abstract
An electron gun having a thermionic emitter held by boron carbide heating members or the like, supported by electroconductive members which have additional elastic positioning members arranged to nullify the emitter shift and other effects caused by heat distortion.