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:
Feb. 05, 1991
Filed:
Dec. 29, 1989
Kenneth A Guzowski, Hoffman Estates, IL (US);
Andrew C Derr, Western Springs, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
A three-beam unitized, in-line electron gun for a color cathode ray tube has a series of hollow, rectangulr-in-cross-section electrodes for the side-by-side accommodation of the three beams. A two-element anode electrode for the gun includes first and second cup-shaped elements each having an apertured electrode face. The second cup-shaped element is nested in the first element, and has a cup draw effective to provide a predetermined distance between the electrode faces when the cups are in nested relationship. The critical focusing and convergence of the gun can thereby be adjusted by the adjustment of the cup draw.