Eccentrically mounted six-pole rings for a static convergence un

Details Eccentrically mounted six-pole rings for a static convergence un Eccentrically mounted six-pole rings for a static convergence un

1976-01-02

1977-08-30

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335210, H01F 100

Patent

active

040457540

ABSTRACT:
Two six-pole annular magnetic structures are arranged about the neck of a three-in-line color display tube so as to be eccentric with respect to each other and with respect to the center of the neck. The center of one six-pole is situated halfway between the central electron beam and one outer electron beam. The two beams on both sides of the center of the six-pole, consequently, are subjected to equal forces of the same direction. The third beam is subjected to a force in the same direction, but this force is nine times larger due to the three times as large distance from the center of the six-pole and due to the square-law field variation thereof. Because of their identical direction and value, the forces acting on the former beams will not disturb the convergence therebetween.

REFERENCES:
patent: RE27698 (1973-07-01), Werst
patent: 3290534 (1966-12-01), Kratz

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