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:
Jun. 18, 2002
Filed:
Mar. 24, 1999
Applicant:
Inventors:
Steven Bardell, Nr. Great Dunmow, GB;
Steven Aitken, Chelmsford, GB;
Assignee:
EEV Limited, Essex, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 2/502 ;
U.S. Cl.
CPC ...
H01J 2/502 ;
Abstract
An electron beam tube includes an electron gun included within a vacuum envelope defined partly by a ceramic cylinder. The ceramic cylinder includes straight sided portions and with an intervening conical section between them. The straight sided portions and form part of two r.f. chokes, being metallized on their inner and outer surfaces and forming a connection with a cavity forming part.