Method and apparatus for adjusting the static convergence and pu

Details Method and apparatus for adjusting the static convergence and pu Method and apparatus for adjusting the static convergence and pu

1985-10-17

1987-02-03

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315370, 358 10, H01J 2970, H01J 2976

Patent

active

046410627

ABSTRACT:
An apparatus for adjusting the static convergence and/or the purity of a color television tube particularly of the kind having a perforated mask. A magnetizable ring encircles the neck of the tube. Poles are formed in this ring by means of coils displaceable in such manner that these coils and/or their cores are applied against the periphery of the magnetizable ring. The application of the coils or of their cores against the ring renders constant the relationship between the current supplied to these coils and the intensity of magnetization obtained.

REFERENCES:
patent: 3348177 (1967-10-01), Wood
patent: 4001877 (1977-01-01), Simpson
patent: 4105983 (1978-08-01), Barten et al.
patent: 4138628 (1979-02-01), Smith
patent: 4390815 (1983-06-01), Key et al.

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