Cathode-ray tube having a temperature compensated mask-frame assembly

In a cathode-ray tube having a shadow mask mounted therein in spaced relation to a screen, said mask including an apertured central portion and a peripheral skirt portion, the improvement comprising

• said skirt portion including a plurality of slots extending inwardly from the outer edge of the skirt portion, at least one of said slots being bridged by a member attached to the mask at opposite sides of said one slot, and said member being of a material having a different coefficient of thermal expansion than said mask.

In a cathode-ray tube having a shadow mask mounted therein in spaced relation to a screen, said mask including an apertured central portion and a peripheral skirt portion, the improvement comprising

• said skirt portion including a plurality of flutes with each flute being bridged by a member having a different coefficient of thermal expansion than said mask, and said bridge member being attached to said mask at opposite sides of said flutes.

In a cathode-ray tube having a shadow mask attached to a peripheral frame, the improvement comprising

• said frame including a plurality of slots extending to an edge thereof, said slots being bridged by members attached to said frame at opposite sides of said slots and said members being of a material having a different coefficient of thermal expansion than said frame.

In a cathode-ray tube having a shadow mask mounted therein in spaced relation to a screen, said mask including an apertured central portion and a peripheral skirt portion, the improvement comprising

• said skirt portion including a plurality of slots extending inwardly from an outer edge of said skirt, said slots being bridged by first members attached to said mask at one side of each of said slots and attached to second members at the other sides of said slots, said second members being attached to said mask between the locations of attachment to said first members and said slots, and said first and second members being of materials having different coefficients of thermal expansion than said mask.

In a cathode-ray tube having a shadow mask mounted therein in spaced relation to a screen, said mask including an apertured central portion and a peripheral skirt portion, the improvement comprising

• said skirt portion including a plurality of slots extending inwardly from an outer edge of said skirt, said slots being bridged by first members attached to said mask at one side of each of said slots and attached to second members at the other sides of said slots, said second members being attached to said mask between the locations of attachment to said first members and said slots, and said first and second members being of materials having different thermal time constants.

In a cathode-ray tube having a shadow mask mounted therein in spaced relation to a screen, said mask including an apertured central portion and a peripheral skirt portion, the improvement comprising

• said skirt portion including a plurality of slots extending inwardly from the outer edge thereof, some of said slots being bridged by members attached to said mask at opposite sides of each of said some slots, said members being of a material having a different coefficient of thermal expansion than said mask, and at least one of said slots being unbridged.