Television width linearity control

Claim 1

IN A TELEVISION RECEIVER, AN ELECTROMAGNETIC BEAM DEFLECTION SYSTEM FOR THE CATHODE RAY TUBE COMPRISING, A DEFLECTION COIL ASSOCIATED WITH SAID TUBE FOR PRODUCING A BEAM DEFLECTING ELECTROMAGNETIC FIELD THEREIN, A SOURCE OF SAWTOOTH WAVEFORM CURRENT, AN ASYMMETRICALLY NONLINEAR INDUCTOR COIL CONNECTED SERIALLY WITH SAID DEFLECTION COIL AND SAID SOURCE, SAID INDUCTOR COIL COMPRISING A HELICAL COIL, A PERMANENT MAGNET FIXEDLY DISPOSED ADJACENT SAID INDUCTOR COIL TO ESTABLISH A STATIC MAGNETIC FLUX COMPONENT THEREIN OF A SUFFICIENT MAGNITUDE TO CAUSE ASYMMETRICAL SATURATION OF SAID INDUCTOR COIL IN RESPONSE TO SAWTOOTH DEFLECTION CURRENT FLOWING THERETHROUGH, A FIRST CORE MEMBER COMPRISING A MAGNETIC CONDUCTING MATERIAL AND BEING DISPOSED AT ONE END OF SAID INDUCTOR COIL ADJACENT SAID PERMANENT MAGNET, SAID FIRST CORE MEMBER BEING OPERATIVE TO BE MOVED AXIALLY WITH RESPECT TO SAID INDUCTOR COIL FOR CONTROLLING THE AMOUNT OF MAGNETIC FLUX LINKING SAID INDUCTOR COIL FROM SAID PERMANENT MAGNET FOR VARYING THE ASYMMETRICAL PROPERTIES OF SAID INDUCTOR COIL, AND A SECOND CORE MEMBER COMPRISING A HIGH PERMEABILITY MATERIAL AND BEING DISPOSED AT THE OTHER END OF SAID INDUCTOR COIL AND BEING OPERATIVE TO MOVE AXIALLY WITH RESPECT TO SAID INDUCTOR COIL FOR VARYING THE NOMINAL IMPEDANCE OF SAID INDUCTOR COIL.