Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Electron or ion beam deflecting type
Patent
1976-11-15
1978-10-24
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Electron or ion beam deflecting type
335210, H01F 500
Patent
active
041224213
ABSTRACT:
A device for controlling the convergence of the side beams of a color television picture tube having three in-line electron guns, comprising two sets of coils wound on an annular ferromagnetic support in a configuration which, when an electric current is passed through one of the sets of coils, generates a magnetic field which influences only one of the side beams causing it to deflect in one direction and when an electric current is passed through the other of the sets of coils, generates a magnetic field which influences only the other of the side beams also causing deflection thereof in the said one direction. Deflection of the two side beams in a direction orthogonal to the said one direction is achieved independently by two further sets of coils which generate magnetic fields individually influencing associated side beams to cause deflection thereof by an amount depending on the magnitude and direction of the currents flowing in the coils. Four controls individually adjusting the magnitude and direction of the current in the four sets of coils thus independently adjust the two side beams.
REFERENCES:
patent: 3701065 (1972-10-01), Mirsch
patent: 3721930 (1973-03-01), Barkow et al.
patent: 3906418 (1975-09-01), Doshi et al.
Harris George
Indesit Industria Elettrodomestici Italiana S.p.A.
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