Color selection means for color display tubes

Details Color selection means for color display tubes Color selection means for color display tubes

1993-11-22

1995-06-13

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313402, 313408, H01J 2907

Patent

active

054246032

ABSTRACT:
Color selection means for color display tubes is provided comprising a curved mask and a rectangular frame supporting the mask, which frame comprises four parts. To realize a light and nevertheless rigid frame construction, at least two oppositely located frame parts are formed by folded pipes which each have a re-entrant wall with an edge following a curved path. The mask is clamped onto these edges so that the curvature of the edges determines the curvature of the mask.

REFERENCES:
patent: 4599533 (1986-07-01), Ragland, Jr.
patent: 5270612 (1993-12-01), Fogelsom
Tetzner, Neue Masken fur hellere Bilder, Funkschau 11, 1989, pp. 49-54.

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