Abstract: A system or device for concentrating the light radiation of the type to be used for converting the solar radiation into electric current and/or thermal energy is disclosed. The device mainly having a primary optics apt to be exposed to the solar radiation and to allow the passage thereof therethrough, the primary optics being positioned on a hollow spacer member, which is perfectly aligned and at the same time locked, by means of a joint member.

Abstract: A system or device for concentrating the light radiation of the type to be used for converting the solar radiation into electric current and/or thermal energy is disclosed. The device mainly having a primary optics apt to be exposed to the solar radiation and to allow the passage thereof therethrough, the primary optics being positioned on a hollow spacer member, which is perfectly aligned and at the same time locked, by means of a joint member.

Abstract: Color cathode-ray tube comprising a color selection mask tensioned in at least one direction, the mask having, on its peripheral area, mask-vibration damper means in the form of a coupled oscillator of the type comprising a metal strip whose ends are welded to the surface of the mask and whose central region comes into contact with the surface of the mask by a spring effect.

Abstract: Color cathode-ray tube comprising a color selection mask tensioned in at least one direction, the mask having, on its peripheral area, mask-vibration damper means in the form of a coupled oscillator of the type comprising a metal strip whose ends are welded to the surface of the mask and whose central region comes into contact with the surface of the mask by a spring effect.

Abstract: A color cathode ray tube comprises a color selection mask stretched in at least one direction, the mask comprising on its peripheral surface mask vibration damper means in the form of a coupled oscillator of the type comprising a central part attached to the surface of the mask and two wings extending on either side of the central part.

Abstract: A color cathode-ray tube comprises a mask, intended for selecting the colors, which is tensioned on a support frame, the frame/mask assembly including means for preventing the tensioned mask from vibrating under the influence of external vibrations. These means comprise at least one mechanical oscillator, coupled to the mask, in the form of metal strips produced by partial cutting of the surface of the peripheral region of the mask.

Abstract: An improved color picture tube, operable in a multistandard television receiver, includes a viewing screen, a shadow mask and an electron gun for generating and projecting three electron beams through the shadow mask and onto the screen. The screen includes phosphor lines that extend in a first direction. The electron beams are subject to deflection in the first direction and in a second direction, that is substantially perpendicular to both the first direction and the phosphor lines. The shadow mask includes elongated slit-shaped apertures that are aligned in columns that substantially parallel the phosphor lines. The adjacent apertures in each column are separated from each other by tie-bars in the mask, and the tie-bars in one column are offset from the tie-bars in adjacent columns in the first direction. The improvement includes the tie-bars in alternate columns lying on substantially straight lines that form an angle of approximately 2 degrees with respect to the second direction.