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:
Oct. 13, 1998
Filed:
Aug. 03, 1995
Applicant:
Inventors:
Graham Douglas White, Halstead, GB;
David Mark Wilcox, Chelmsford, GB;
Assignee:
EEV Limited, Essex, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
315-539 ; 315-543 ; 315-551 ; 315-535 ;
Abstract
An electron beam tube includes a unitary metal cylinder and a plurality of transverse walls located within it which define resonant cavities. As the cylinder is in one piece vacuum joints are only required at the ends of the structure. Drift spaces between the resonant cavities are enclosed within drift tubes which join two adjacent transverse walls. The inner diameter of the tube is stepped to facilitate assembly and accuracy of the structure. In use, an electron beam is generated and interacts with applied r.f. energy to produce amplification of an applied r.f. signal.