Abstract: A detent type tuning mechanism for a UHF tuner having a continuously variable tuning shaft includes a detented selector shaft, and a fine tuning mechanism including a rotatable turret having mounted thereon a plurality of cams, each adjustable by a fine tuning shaft when the selector shaft is positioned in a predetermined position. A variable impedance element, operated by the fine tuning mechanism, is provided for fine tuning the tuner independently of the position of the selector shaft and the tuning shaft to permit a precise numerical display of the UHF channel selected in each position of the detented selector shaft.

Abstract: A flexible robot arm according to the present invention is composed of a number of mutually connected rigid links and operatively adapted to perform controlled bending movements driven by robot drive means. Said successive links of the arm are both interlinked as chain links and hinged to each other between interlinked link ends, preferably by means of universal joints. In addition pairs of arm links which are interlinked with the same intermediate link, are pivotably adjoined at their adjacent extreme ends. One of the terminal ends of the arm is connected with the drive means in such a manner that controlled angular tilts may be imparted to the first link of the arm, corresponding tilts being transferred to the successive arm links by means of the above hinge and pivotable connections between the individual links of the arm. Further the connection between the robot arm and the drive means may be arranged in such a way that the arm may be rotated independently of the bending of the same.