Color picture tube having improved shadow mask-frame assembly su

Details Color picture tube having improved shadow mask-frame assembly su Color picture tube having improved shadow mask-frame assembly su

1989-07-21

1990-08-21

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313406, H05J 2907

Patent

active

049509411

ABSTRACT:
The present invention provides an improvement in color picture tubes including an evacuated glass envelope having a rectangular faceplate panel. The panel includes a shadow mask assembly mounted therein by support means located at peripherally spaced positions within the panel. The support means at each of the spaced positions includes a stud attached to the glass envelope, a spring and a plate. The spring has an aperture therein that engages the stud. The spring is attached to the plate, and the plate is welded to the mask assembly. The improvement comprises the plate being welded to the mask assembly at only one location. This location is on a line, perpendicular to the plate, that passes through the center of the aperture in the spring.

REFERENCES:
patent: 3529199 (1970-09-01), Duistermaat et al.
patent: 4317064 (1982-02-01), Dougherty
patent: 4723088 (1988-02-01), Sone et al.
patent: 4728853 (1988-03-01), Sone et al.
patent: 4827180 (1989-05-01), Sone et al.

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