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:
Dec. 10, 1991
Filed:
Dec. 18, 1985
Applicant:
Inventors:
Didier Grauleau, Soisy sous Montmorency, FR;
Dominique Henry, Elancourt, FR;
Assignee:
Thomson CSF, Puteaux, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
228122 ; 315-35 ; 315 393 ;
Abstract
This invention pertains to a travelling wave tube with a helix-type delay line attached to a sleeve through the use of boron nitride dielectric supports, which have a layer of insulating material with a secondary emission coefficient greater than 1, such as aluminum or beryllium oxide, for example.