Tensed shadow mask assembly

Details Tensed shadow mask assembly Tensed shadow mask assembly

1988-09-08

1990-08-21

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

H01J 2907

Patent

active

049509446

ABSTRACT:
A tensed shadow mask assembly for a cathode ray tube having a phosphor-deposited screen, which comprises a generally rectangular perforated plate having four corners and correspondingly four peripheral edge portions and a four-sided frame member similar in shape to the contour of the perforated plate having four fitting faces to which the respective peripheral edge portions of the perforated plate is rigidly secured while the perforated plate is held under tension. The perforated plate is generally scalloped with respect to the center thereof such that corners of the perforated plate occupy respective positions on one side away from an imaginary plane touching the center of the perforated plate and being perpendicular to the longitudinal sense of the cathode ray tube, while substantially intermediate region of peripheral edge positions between the neighboring corners occupy respective positions on the other side away from the imaginary plane.

REFERENCES:
patent: 4280077 (1981-07-01), Villanyi
patent: 4737681 (1988-04-01), Dietch et al.
patent: 4745329 (1988-05-01), Dietch

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