Color picture tube having improved shadow mask frame

Details Color picture tube having improved shadow mask frame Color picture tube having improved shadow mask frame

1995-11-14

1997-11-18

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, H01J 2907

Patent

active

056891504

ABSTRACT:
An improved color picture tube includes an evacuated envelope having a rectangular faceplate panel. The panel includes a viewing screen on an inner surface thereof and a shadow mask-frame assembly mounted therein. The shadow mask-frame assembly includes an apertured shadow mask and a peripheral frame to which the mask is attached. The improvement comprises the frame being formed by eight sections, two identical long side sections, two identical short side sections and four corner sections, that are attached together edge-to-edge. The two long side sections and the two short side sections are thinner than the four corner sections.

REFERENCES:
patent: 3516147 (1970-06-01), Seedorff et al.

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