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. 06, 1976
Filed:
Sep. 06, 1974
Applicant:
Inventor:
Robert Charles Wheeler, Genesee, NY (US);
Assignee:
GTE Sylvania Incorporated, Stamford, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315371 ; 315370 ;
Abstract
Raster and particularly top and bottom pincushion distortion in a cathode ray tube system is corrected by applying a drive signal from the vertical output system of a television receiver to the vertical deflection winding of a yoke to effect activation of switching elements whereby correction signals of the proper phase and amplitude and derived from the horizontal scan system are applied to the vertical deflection winding such that a vertical deflection potential at a frequency fv is modulated by a horizontal deflection potential at a frequency fh and of the correct phase and magnitude.