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. 15, 1985
Filed:
Sep. 29, 1980
Norman F Gioia, Lombard, IL (US);
Fred H Seher, Lombard, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
An in-line electron gun in a color TV cathode ray tube generates three coplanar electron beams. The raster pattern projected by the center beam is diminished in vertical height so as to be non-coextensive with the two off-axis beams. The gun is characterized by having two pairs of inwardly converging but non-intersecting magnetic field enhancer means, one of each pair being located at a point of beam egress and embracing in symmetrical relationship one of the off-axis beams. Each member of each of the pairs comprises an L-shaped bracket with the brackets defining an opening therebetween, with one leg of each bracket providing for attachment to the electrode. The brackets, the predetermined angle and distance, and their separation and length are such that the enhancer means is effective to divert the flux of the vertical deflection field through the openings between the enhancer means. As a result, the vertical height of the raster pattern of the center beam is enhanced into coextensiveness with the raster patterns of the off-axis beams.