Apparatus for positioning a deflection unit on a television tube, especially a colour tube

摘要

An apparatus for adjusting the position of the deflector of a television tube, particularly a color tube, especially so that the tube deflector assembly may become autoconvergent. The apparatus comprises a platform movable in accordance with n degrees of freedom and n elements such as arms, each of which has its displacement controlled in accordance with only one degree of freedom, for example a simple translatory displacement in order to assure the mobility of the platform in accordance with the n degrees of freedom.