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:
Jul. 22, 1980
Filed:
Dec. 04, 1978
Brian R Sowter, Winchester, GB;
William A Warwick, Winchester, GB;
International Business Machines Corporation, Armonk, NY (US);
Abstract
An electromagnetic lateral convergence assembly includes a generally-annular, planar magnetic core (optionally found as a laminate) having integral pole pieces extending toward the center of the annulus. Electrical coils are mounted on selected pole pieces for producing a convergence-compensating magnetic field within the center of the annulus. The coils are secured to a printed circuit board to hold the core in spaced parallel relationship to the board. Optionally a purity assembly including a planar magnetic core having a number of electrical coils for producing a rotatable, variable, linear field is mounted on the other side of the printed circuit board.