Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Reexamination Certificate
2006-02-07
2006-02-07
Santiago, Mariceli (Department: 2879)
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
C313S408000, C445S036000
Reexamination Certificate
active
06995503
ABSTRACT:
A cathode ray tube is provided, in which the flatness of a tension mask constituting a color-selection mechanism is maintained by a suitable stretching force, while with the tension mask, the influence of external magnetic fields, such as the terrestrial magnetism is suppressed, and the shifting of the electron beam is reduced. A tension mask made of a magnetostrictive material is used, the tension mask is stretched by a stretching force in a range maintaining the flatness of the tension mask, and the direction and strength of the stretching force are set such that vertical magnetic permeability of the tension mask increases, due to a magnetoelastic effect caused by the stretching force in the magnetostrictive material of the tension mask.
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Hatta Shin-ichiro
Iwamoto Hiroshi
Murai Ryuichi
Nakatera Shigeo
Ozawa Tetsuro
Hamre Schumann Mueller & Larson P.C.
Perry Anthony
Santiago Mariceli
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