Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1988-12-02
1990-07-17
O'Shea, Sandra L.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
313403, 313269, H01J 2907
Patent
active
049423320
ABSTRACT:
A slit-type foil tension mask and associated front assembly for a color cathode ray tube comprise a series of parallel strips separated by slits. The strips are loosely coupled by widely spaced ties, the wide tie spacing being such as to produce a strip coupling which promotes handleability of the mask during mask and tube fabrication and facilitates damping of strip vibration when mounted in a tube, but which is insufficient to induce unacceptable Poisson contraction of the mask when uniaxially tensed along the direction of the strips in the plane of the mask, or to permit an unacceptable thermal expansion perpendicular to said strips.
REFERENCES:
patent: 2701847 (1955-02-01), Yanagisawa et al.
patent: 2813213 (1957-11-01), Cramer
patent: 2905845 (1959-09-01), Vincent
patent: 3638063 (1972-01-01), Tachikawa
patent: 3894321 (1975-07-01), Moore
patent: 3944867 (1976-03-01), Kaplan
patent: 3989524 (1976-11-01), Palac
patent: 4100451 (1978-07-01), Palac
patent: 4495437 (1985-01-01), Kume
patent: 4686416 (1987-08-01), Dougherty
patent: 4695761 (1987-09-01), Fendley
"Improvements in the RCA Three-Beam Shadow-Mask Color Kinescope" by M. J. Grimes et al, Proceeding of the I-R-E, Jan. 1954, pp. 315-325.
Adler Robert
Coult John H.
Strauss Paul
O'Shea Sandra L.
Zenith Electronics Corporation
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