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:
May. 10, 1994
Filed:
Dec. 28, 1992
Applicant:
Inventor:
Wayne D Grocki, Libertyville, IL (US);
Assignee:
Zenith Electronics Corporation, Glenview, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315-8 ; 315364 ; 315370 ; 315408 ; 315371 ;
Abstract
A CRT image display emanates an undesired stray magnetic field that originates in the horizontal deflection coil of a beam-deflecting yoke energized by pulses from a horizontal oscillator circuit. A novel drop-in auxiliary pulse generator substantially electrically independent of the CRT image display, and synchronized with the output of the horizontal oscillator circuit, provides for energizing systems or devices that can suppress the stray magnetic field. The auxiliary pulse generator relieves the CRT horizontal oscillator of the burden of energizing a system for suppressing the stray magnetic field.