公开(公告)号：US3555473A

公开(公告)日：1971-01-12

申请号：US3555473D

申请日：1969-07-07

Applicant: ZENITH RADIO CORP

Inventor： FIGLEWICZ RAYMOND C ,  KARHAN VICTOR J

IPC: H01J29/70 ,  H01F1/00

CPC classification number: H01J29/702 ,  H01J2229/5682

Abstract: AN ELECTRON BEAM CONVERGENCE APPARATUS FOR A MULTIBEAM COLOR REPRODUCING CATHODE-RAY TUBE WHICH HAS POLE PIECE PAIRS INDIVIDUALLY FLAKING THE PATH OF AT LEAST TWO OF THE THREE BEAMS, INCLUDES A CORE OF MAGNETIC MATERIAL HAVING A PAIR OF SPACED LEGS EACH OF WHICH IS SUPPORTED ADJACENT AN ASSIGNED POLE PIECE. A PERMANENT MAGNET IS MAGNETICALLY COUPLED TO THE CORE FOR SIMULTANEOUSLY AND SYMMETRICALLY SUBJECTING THE TWO ELECTRON BEAMS TO EQUAL AND OPPOSITE HORIZONTAL STATIC CONVERGENCE DEFLECTION FIELD COMPONENTS. AN ADDITIONAL MAGNET, WHICH IS MAGNETICALLY ISOLATED FROM THE CORE, IS PROVIDED FOR SIMULTANEOUSLY AND SYMMETRICALLY SUBJECTING THE TWO BEAMS TO EQUAL AND OPPOSITE VERTICAL STATIC CONVERGENCE DEFLECTION FIELD COMPONENTS, BUT WITHOUT AFFECTING THE HORIZONTAL COMPONENTS.