Videocolor S.p.a.

Pedro Eugenio Cosma

Paolo Spina

Carlo Tulli

A cathode-ray tube comprises a color-selection frame/mask assembly, the mask being held under tension by being welded onto the ends of the long sides of the frame, the frame/mask assembly being suspended within the tube with the aid of supports capable of serving to augment the mechanical rigidity of the sides onto which these supports are welded and to cause the long sides of the frame to approach closer to each other during the phases of manufacture at high temperature.

Cathode-ray tube having a multifunction frame/mask support

The improved color picture tube includes an evacuated glass envelope having a rectangular faceplate panel. The panel includes a shadow mask assembly mounted therein by support means located at the four corner of the panel. Each support means includes a stud attached to the glass envelope. The improvement comprises the support means also including, at each of the four corners, a first spring and a second spring. Each spring is elongated, with a first portion thereof attached to the mask assembly and a second portion thereof cantilevered away from the assembly. The first spring extends peripherally in a first direction with respect to the assembly, and the second spring extends peripherally in a second direction with respect to the assembly. The first spring includes an aperture within the second portion that engages a respective stud. A section of the second portion of the second spring overlaps the second portion of the first spring. The overlapped portions of the first and second springs are attached together.

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Rome, Italy

Pedro Eugenio Cosma