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. 21, 1980
Filed:
Jun. 18, 1979
Roger Hoet, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
A thin-walled grid of pyrolytic graphite for a high-power electron tube such as a triode or tetrode has a lower end in the form of a bell-shaped sleeve provided with uniformly spaced longitudinal slots which stop short of the edge of the sleeve. The solid edge portion thus formed beneath each slot serves to fit the sleeve over a metal ring of the electron tube base. The grid sleeve is clamped against the metal ring by means of screws engaged in internally-threaded bores of the ring. The edge portions of the graphite sleeve are thus fractured so as to form longitudinal strips which compensate for differences in expansion between the graphite and the metal while ensuring good electrical contact.