Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1994-09-16
1996-07-02
O'Shea, Sandra L.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313402, H01J 2981
Patent
active
055325467
ABSTRACT:
A color selecting electrode mounting frame of a CRT which eliminates the waste of materials, is easy to process and assemble, and is low cost of production and a process for production of the same. The color selecting electrode mounting frame for a CRT comprises a pair of long members of an L-sectional shape having curved surfaces formed at their top edge portions to which two opposing sides of a color selecting electrode are attached and a pair of short members having end portions joined to the two ends of these long members. The long members are obtained by blanking a plate of a fixed width into an arc shape of a predetermined curvature, then forming this into an L-sectional shape and a curvature matching the panel glass surface of the CRT. The two end portions of the short members are processed to match the curvature of the two end portions of the long members. The end portions of the short members are processed by a twisting, crushing, or shaving process.
REFERENCES:
patent: 4286189 (1981-08-01), Koizumi et al.
patent: 4495437 (1985-01-01), Kume et al.
patent: 5416380 (1995-04-01), Horiuchi
patent: 5424603 (1995-06-01), Van Den Bekeroom
Kananen Ronald P.
O'Shea Sandra L.
Patel Vip
Sony Corporation
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