Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1984-03-29
1986-09-23
Moore, David K.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313406, 313407, H01J 2907
Patent
active
046137858
ABSTRACT:
An improved color picture tube according to the invention includes an evacuated envelope enclosing a substantially rectangular cathodoluminescent screen, a color selection electrode suspended in register with the screen by a support structure, and an electron gun. The support structure includes a plurality of studs attached to the envelope adjacent to the corners of the screen and a plurality of springs connecting the color selection electrode to the studs. Each spring is a bimetal member of laminated construction having two layers of dissimilar metal joined along facing surfaces. Each of the springs has a proximal end attached at an angle to the color selection electrode and a distal end with an aperture therethrough which pivotably engages one of the studs. Each of the springs includes a step-like portion formed therein. The springs provide longitudinal and rotational compensation to maintain the color selection electrode in register with the screen when the color selection electrode and the springs are heated.
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A Morrell, H. Law, E. Ramberg and E. Herold, Color Television Picture Tubes, 100-102, 104-107, Academic Press (1974).
Coughlin Jr. Vincent J.
Irlbeck Dennis H.
Moore David K.
RCA Corporation
Whitacre Eugene M.
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