Shadow mask frame structure with long-sides having higher mechan

Details Shadow mask frame structure with long-sides having higher mechan Shadow mask frame structure with long-sides having higher mechan

1995-10-24

1998-04-21

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313404, 313405, 313407, H01J 2981

Patent

active

057421161

ABSTRACT:
In a color cathode ray tube apparatus, a shadow mask is fixed on a frame with a predetermined tension for cancelling a thermal expansion of the shadow mask during normal operation of the color cathode ray tube apparatus. The mechanical strength of the longer sides on the frame is higher than that of the shorter sides of the frame by fixing reinforcing plates or ribs on the longer sides in order that the tension of the shadow mask not become uneven.

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patent: 5218267 (1993-06-01), Ragland, Jr.
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Copy of European Search Report dated Mar. 4, 1996.
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Publication No. JP 55-86049, Patent Abstracts of Japan, vol. 4, No. 133, Sep. 18, 1990.

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