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:
Mar. 01, 1988
Filed:
Feb. 20, 1986
Applicant:
Inventors:
Maurice Esterson, Chelmsford, GB;
Jennifer Harley nee May, Leigh-on-Sea, GB;
Assignee:
English Electric Valve Company Limited, Chelmsford, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
315 39 ; 315 3953 ; 315 3977 ; 315 40 ; 315-3 ; 315-4 ; 315-5 ; 228178 ; 228179 ; 174 5061 ; 174 5063 ;
Abstract
An external cavity klystron vacuum tube has a ceramic cylindrical wall surrounded by an external cavity within which is an output probe. The cylindrical wall section is sealed at its ends to other components of the tube--to enable the interior to be evacuated--by sealing means such as to avoid a sharp edge projecting inwardly towards the interior of the cavity.