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:
Apr. 09, 1985
Filed:
Feb. 09, 1980
Applicant:
Inventors:
Minoru Yabe, Mobara, JP;
Kenichi Noda, Mobara, JP;
Satoru Endo, Mobara, JP;
Masaaki Yamauchi, Tohgane, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313460 ; 313409 ;
Abstract
An electrode structure for an electron gun, especially an in-line type electrode structure for an electron gun of a color picture tube. The electrode structure dispenses with auxiliary electrodes and its three cylindrical members are integrally formed by press work. After the pressing step, the inner edge of the bottom portion of each cylindrical members is beveled to provide a tapering surface having a desired circular cross section. By forming a circular groove in the bottom portion, opposite to the tapering surface, the formation of the tapering surface is made more exact.