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:
Dec. 22, 1981
Filed:
Jun. 30, 1980
Kenneth W McGlashan, Lancaster, PA (US);
RCA Corporation, New York, NY (US);
Abstract
In a color television receiver having an in-line electron beam kinescope and deflection yoke, a correction apparatus comprises a pair of magnetically permeable field formers located on opposite sides of the yoke. A first portion of each field former lies within the external field of the vertical deflection coils and channels flux from the external field into the field formers. A second portion of each field former is configured to form a pair of feet located above and below the longitudinal axis of the kinescope. Flux channelled into the field formers is directed by the feed to form a pincushion-shaped field within the kinescope neck to correct vertical coma errors. A third portion of each field former lies forward of the feet and directs the channelled flux to form a barrel-shaped field within the kinescope neck to correct any misconvergence of the outer electron beams caused by the coma correcting field. In one embodiment, the field formers are coupled to a front crossarm assembly to provide both correction of coma errors and side pincushion distortion.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile