Color picture tube having spring supports for a mask-frame assem

Details Color picture tube having spring supports for a mask-frame assem Color picture tube having spring supports for a mask-frame assem

1983-05-09

1985-07-09

Demeo, Palmer

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313406, 313407, H01J 2907

Patent

active

045284750

ABSTRACT:
An improved color picture tube according to the invention includes an evacuated envelope enclosing an apertured mask attached to a frame which are suspended in relation to a cathodoluminescent screen by novel support means. The tube also includes an electron gun for forming a plurality of electron beams and directing the beams through the mask to the screen. An axis passing through the center of the electron gun and the center of the screen is the longitudinal axis of the tube. The screen also includes a major axis and a minor axis which are perpendicular to each other and perpendicular to the longitudinal axis. The support means includes a plurality of studs embedded in the envelope and spaced around the frame and a plurality of springs. Each spring has an aperture at one end engaged with one of the studs and each spring is attached at the other end to the frame. The improvement comprises the springs being angled with respect to the frame such that the angle between a spring and the frame is of an amount to align a spring-to-frame attachment point when the spring and frame are unheated with the same attachment point when the spring and frame are heated within a plane that is parallel to a plane containing the longitudinal axis of the tube.

REFERENCES:
patent: 3492522 (1970-01-01), Pappadis
patent: 3617787 (1971-11-01), Emmasingel
patent: 3803436 (1974-04-01), Morrell
patent: 3935497 (1976-01-01), Cowles et al.

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