Deflection yoke apparatus with convergence device for in-line co

Details Deflection yoke apparatus with convergence device for in-line co Deflection yoke apparatus with convergence device for in-line co

1978-12-15

1981-05-12

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335210, H01F 300

Patent

active

042675413

ABSTRACT:
A deflection yoke apparatus comprising a yoke which is provided with horizontal and vertical deflection coils, a coil separator disposed between these deflection coils and a deflection core which surrounds the above-mentioned parts, and a convergence device which is attached to a rear part of said yoke and provided with a pair of coil devices which converge electron beams and a cover which supports the coil devices, wherein a pair of coil devices are arranged in a vertical direction intersecting at right angles to the direction of the in-line array of electron beam, the coil devices comprise U-shaped cores and convergence coils which are mounted on the U-shaped cores and supply a fixed amount of vertical deflection current and the U-shaped cores are constructed to be movable in the direction of electron beam to converge electron beams though the convergence coils are fixedly positioned.

REFERENCES:
patent: 3305807 (1967-02-01), Ashley et al.
patent: 3350592 (1967-10-01), Mason
patent: 3462638 (1969-08-01), Tetsuo et al.
patent: 3469218 (1969-09-01), Zoladz
patent: 4088930 (1978-05-01), Barten
patent: 4096531 (1978-06-01), Yamada et al.

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