Color picture tube magnetic shielding and degaussing structure

Details Color picture tube magnetic shielding and degaussing structure Color picture tube magnetic shielding and degaussing structure

1979-08-29

1981-01-06

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Pulse storing

315 85, 361150, H01J 2906

Patent

active

042439132

ABSTRACT:
A combined magnetic shielding and degaussing structure for an in-line color picture tube comprises magnetizable shielding plates of an extended surface area each located at a corner of the picture tube and two vertically oriented magnetizable strips. Each strip connects upper and lower corner shielding plates on one side of the picture tube. The shielding plates guide stray magnetic flux into the strips and away from the picture tube interior in order to provide magnetic shielding. A degaussing winding is wound around the vertical axis of each strip and generates a degaussing flux which flows through the shielding plates and into the color picture tube shadow mask.

REFERENCES:
patent: 3317781 (1967-05-01), Barbin et al.
patent: 3322998 (1967-05-01), Norley
patent: 3576395 (1971-04-01), Arrington et al.
patent: 3588583 (1971-06-01), Ciecierski
patent: 3867668 (1975-02-01), Shrader
patent: 3965386 (1976-06-01), Duistermaat et al.

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