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:
Aug. 26, 1986
Filed:
Feb. 11, 1981
Applicant:
Inventor:
Hiroshi Oki, Chiba, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
3134 / ; 313318 ; 220 / ;
Abstract
An electron tube is disclosed in which an envelope glass bulb and a glass stem having an electron gun assembly mounted thereon and accommodated within the bulb are sealed to each other. The sealed interface portion between the bulb and the stem incorporates concentrically with the electron gun assembly a metallic ring member made of an alloy or metal material having a good bonding ability to the glass materials of the bulb and the stem. The sealing is effected by a high frequency heating of the metallic ring member. An ohmic heating may be additionally used.