Magnetizing apparatus and method for use in correcting color pur

Details Magnetizing apparatus and method for use in correcting color pur Magnetizing apparatus and method for use in correcting color pur

1977-07-26

1979-06-26

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335284, H01F 700

Patent

active

041594568

ABSTRACT:
A cathode ray tube of a color television receiver includes a magnetic material located adjacent to a neck portion. A magnetizing apparatus is used for establishing the color purity of three in-line electron beams within the cathode ray tube. The magnetizing apparatus comprises at least two elongated conductor loops arranged for positioning about the neck in proximity to the magnetic material and capable of being energized by a magnetizing current for creating permanently magnetized regions within the material. The magnetized regions produce a color purity magnetic field within the cathode ray tube for establishing the color purity of the three in-line electron beams. An elongated portion of each of the conductor loops follows along a portion of the periphery of the neck.

REFERENCES:
patent: 4105983 (1978-08-01), Barten

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