Abstract: A tool turret has a housing and a revolving head which can be fixed in different rotational positions by means of an arrangement of toothed rings. A locking device includes a cam drive for the selective releasing and fixing in position of the gear teeth. In order to configure the tool turret simply and to save space, an axially movable, annular locking part is provided with axial gear teeth and has one part of the cam drive in the form of a curvilinear aperture. The middle sections of the curvilinear aperture are straight and side parts extend obliquely. A guide member penetrates the curvilinear aperture as the other part of the cam drive. The teeth cooperating with the teeth on the locking part are mounted on the revolving head and on a stationary toothed ring.

Abstract: A cylindrical tool holder is mounted on a a housing containing a motor, the output shaft of which is coupled through a gear train to a driving ring. One axial face of the driving ring has cam surfaces engageable with cooperating cam surfaces on an axial face of an axially movable locking ring which is spring-urged toward the driving ring. The other axial face of the locking ring has axially facing gear-like teeth which are engageable with mating teeth on a flange formed on the housing and on a ring attached to the tool holder. A lock bolt mounted in the housing and operated by an electromagnet is withdrawn from a ring coupled to the tool holder to permit rotation to a new position and is extended to lock the holder near the new position.

Abstract: A control apparatus for a shaping machine such as a lathe includes a positionable piston and cylinder assembly for driving the cutting tool toward the workpiece to establish cut depth. A feeler rides a pattern to limit cut depth and control cut shape. A plurality of cam-operated switches responsive to piston and cylinder assembly position controls cut depth in successive cycles until control is assumed by the feeler. The feeler operates switches and a control valve to permit close control of the shaping in accordance with the pattern.