Abstract: A stay damper for a door etc., includes a cylinder member filled with filler gas under pressure, a piston rod slidable in the cylinder member and a cover supported by the projecting end of the piston rod so that the lower end of the cover can move radially toward and away from the cylinder. The upper end of the cylinder member is formed with a notch opening upward. When the stay damper is extended, the notch of the cylinder member catches the lower end of the cover and prevents inward movement of the piston rod to hold the stay damper in the extended state.

Abstract: A stay damper for a door etc., includes a cylinder member filled with filler gas under pressure, a piston rod slidable in the cylinder member and a cover supported by the projecting end of the piston rod so that the lower end of the cover can move radially toward and away from the cylinder. The upper end of the cylinder member is formed with a notch opening upward. When the stay damper is extended, the notch of the cylinder member catches the lower end of the cover and prevents inward movement of the piston rod to hold the stay damper in the extended state.

Abstract: Circuitry for preventing a doming phenomenon in a color television receiver includes circuitry (5, 6, 7, 8, 9, 10) for detecting the presence or absence of a high luminance portion not less than a predetermined area on the television receiver screen, and circuitry (11, 60, 2, 3) for slowly and gradually reducing at least one of luminance and contrast of the screen when the high luminance portion not less than a predetermined area exists on the screen.