Grid apparatus for use with a color cathode ray tube

Details Grid apparatus for use with a color cathode ray tube Grid apparatus for use with a color cathode ray tube

1982-08-24

1985-01-22

Demeo, Palmer

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, 313269, 313348, H01J 2907, H01J 1948

Patent

active

044954379

ABSTRACT:
A grid apparatus for use with a color cathode ray tube is described, having a pair of opposing frame members, and a pair of arm portions respectively welded at free ends thereof to the pair of opposing frame members for mechanically connecting the pair of opposing frame members, and for stretching the grid elements with a predetermined tension in cooperation with the pair of opposing frame members, in which each of the pair of arm portions is curved generally as a U-shape in substantially one plane. Both ends of the arm portions are respectively connected to the pair of opposing frame members at positions outside from their Bessel points, and the plane in which each of the pair of arm portions is arranged to respectively widened rearward with an angle from 45.degree. to 65.degree. with respect to a surface perpendicular to an axis of the grid apparatus.

REFERENCES:
patent: 3638063 (1972-01-01), Tachikawa et al.
patent: 4291253 (1981-09-01), Ohkoshi et al.

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