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.

Date of Patent:
Jun. 16, 1998

Filed:

Nov. 01, 1996
Applicant:
Inventor:

Changhoe Kim, Seoul, KR;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313456 ; 313412 ; 313414 ; 313417 ;
Abstract

Disclosed is an electron gun which includes at least one pair of plate electrodes for focusing and accelerating thermal electrons, and at least one pair of cup-shaped focusing electrodes for focusing an electron beam coming out of plate electrodes, wherein the focusing electrodes have two or more electrodes embedded in a bead glass by means of fusing. The embedded electrodes are arranged perpendicularly to each other. A final focusing electrode has a cut groove at both ends, which contains the embedded electrodes. The inside of the final electrode is provided with an internal electrode having the embedded electrodes extended towards the outside through the cut grooves.


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