Corrugated shadow mask assembly for a cathode ray tube
AssigneeRCA Corporation
InventorAlbert M. Morrell
Life of this patent
Estimating the term…
Abstract
A shadow mask type of cathode ray tube is improved by corrugation of the mask and support of the corrugated mask at points of inflection at the edges of the mask.
Claims28
In a shadow mask type cathode-ray tube, the improvement comprising,
- a shadow mask corrugated in one direction having two corrugated sides and two other sides and at least partially suspended in said tube by support means attached at a plurality of points along the corrugated sides of said mask, said mask including a plurality of slit-shaped apertures aligned in columns and the peak-to-peak wavelength dimension of corrugations in the mask being at least twice as great as the spacing between aperture columns.
In a shadow mask type cathode ray tube including a line screen on an inner surface of a faceplate and a shadow mask having elongated apertures mounted within said tube on supports in spaced relation to said screen, the improvement comprising,
- said shadow mask being corrugated and having a substantially sinusoidal cross-section in one direction,
- said supports for holding said mask being attached at the corrugated edges of said mask that extend in the one direction at points of inflection in the mask, and
- the spacing between centerlines of adjacent apertures in the one direction in said mask varying as a function of the variation in spacing between the screen and the mask.
In a shadow mask type cathode ray tube including a cathodoluminescent screen on an inner surface of a rectangular faceplate and a rectangular shadow mask mounted within said tube in spaced relation to said screen, the improvement comprising,
- said shadow mask being corrugated having two corrugated-shaped sides and two other sides, and
- flexible supports interconnecting said mask to said faceplate, said supports being attached to the corrugated sides of said mask at points of inflection of the corrugations, said supports being flexible in a direction parallel to said other sides of the mask to allow expansion of said mask in a direction parallel to
- sides of the mask, said flexible supports being rigid in a direction parallel to the corrugated sides of the mask.
In a shadow mask type cathode ray tube including a line screen on an inner surface of a faceplate and a shadow mask having elongated apertures mounted within said tube on supports in spaced relation to said screen, the improvement comprising,
- said shadow mask being corrugated and having a substantially sinusoidal cross-section in one direction, and
- said supports for holding said mask being attached at the corrugated edges of said mask that extend in the one direction at points of similar amplitude of the corrugations relative to the inner surface of the faceplate.
In a shadow mask type cathode ray tube including a cathodoluminescent screen on an inner surface of a faceplate and a shadow mask mounted within said tube in spaced relation to said screen, the improvement comprising,
- said shadow mask being corrugated having two corrugated-shaped sides and two other sides, and
- flexible supports interconnecting said mask to said tube, said supports being attached to the corrugated sides of said mask at points of similar amplitude of the corrugations relative to the inner surface of the faceplate, said supports being flexible in a direction parallel to said other sides of the mask to allow expansion of said mask in a direction parallel to sides of the mask, said flexible supports being rigid in a direction parallel to the corrugated sides of the mask.
Dependencies are inferred from the claim text.