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. 06, 1981
Filed:
Apr. 25, 1979
Applicant:
Inventor:
Georges Fleury, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315-35 ; 313 30 ; 313 36 ; 315-36 ; 315 393 ;
Abstract
The external outline of the transverse section of the walls externally bounding the cavities (4) is circular, but the thickness of these walls is not constant, being smaller in the zones of these walls which are not traversed by the cooling ducts (5) than in the other zones. Application to travelling-wave tubes carried in aircraft.