Convergence assembly for cathode ray tube

Details Convergence assembly for cathode ray tube Convergence assembly for cathode ray tube

1978-12-04

1980-07-22

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335210, H01F 706, H01J 2966

Patent

active

042142210

ABSTRACT:
An electromagnetic lateral convergence assembly includes a generally-annular, planar magnetic core (optionally found as a laminate) having integral pole pieces extending toward the center of the annulus. Electrical coils are mounted on selected pole pieces for producing a convergence-compensating magnetic field within the center of the annulus. The coils are secured to a printed circuit board to hold the core in spaced parallel relationship to the board. Optionally a purity assembly including a planar magnetic core having a number of electrical coils for producing a rotatable, variable, linear field is mounted on the other side of the printed circuit board.

REFERENCES:
patent: 2568456 (1951-09-01), Malheiros
patent: 2880339 (1959-03-01), Kroger
patent: 3002120 (1961-09-01), Clay
patent: 3424942 (1969-01-01), Barbin
patent: 3831122 (1974-08-01), Hanke et al.

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