Vibration control of color picture tube shadow mask

Details Vibration control of color picture tube shadow mask Vibration control of color picture tube shadow mask

1986-05-27

1987-02-24

Westin, Edward P.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313269, H01J 2980

Patent

active

046459685

ABSTRACT:
A color picture tube is improved by positioning shims on adjacent sides of a mask adjacent the mask corners and between the mask and its peripheral supporting frame. Because of the shims, the resonant frequency of the mask is raised.

REFERENCES:
patent: 3585431 (1971-06-01), Long
patent: 3772555 (1973-11-01), McKee et al.
patent: 4327307 (1982-04-01), Penird et al.
patent: 4437036 (1984-03-01), Ragland
Sony Trinitron tube shadow masks use fine horizontal wires stretched across the apertured array to reduce vibration. (no enclosure).

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