Color picture tube having mask-frame assembly with reduced thick

Details Color picture tube having mask-frame assembly with reduced thick Color picture tube having mask-frame assembly with reduced thick

1975-12-22

1977-11-01

Dahl, Lawrence J.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313348, H01J 2980

Patent

active

040567559

ABSTRACT:
A mask type color picture tube has a mask electrode attached to a peripheral frame having an L-shaped cross-section which is suspended within the tube adjacent a screen of the tube. The mask includes a curved apertured portion. At least an outer area of the apertured portion lies in a curved plane that passes substantially behind a part of the frame closest to the screen.

REFERENCES:
patent: 3005921 (1961-10-01), Godfrey

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