Abstract: A lever-operated feed device is provided, in which a rotational sleeve, having a lever handle at one end thereof, is supported within a slide block for adjustably sliding the same along a guide way of a base through a rack-pinion mechanism. A rod, which operates a clamper to fix the block upon the base at an adjusted position, is extended through the rotational sleeve in co-axial alignment therewith. A clamp handle is secured upon one end of the rod near the lever handle of the sleeve so that the rotational manipulations of the lever handle and the clamp handle can be concentrically performed from a given place.

Abstract: A feed amount setting device for a machine tool is provided wherein an axially slidable follower rod is urged to contact a plate cam rotated by a feed device of the machine tool and is formed with an operating face for pivoting a lever arm, such that movement thereof is transmitted to a switch actuation plunger in a predetermined magnification ratio. A lever support carrying the lever arm is adjustable in a direction parallel with the follower rod, and the plunger is formed with a flat face extending in parallel relation with the adjusting direction of the lever support for engagement with the lever arm, so that the feed amount of the feed device, depending on a signal from a switch element, is variable without adjusting the mounting position of the switch element.

Abstract: A control apparatus for a machine tool having a tool support for supporting a tool for machining a workpiece movable relative to the workpiece is disclosed. The control apparatus includes pulse generating means for generating a train of pulse signals, a drive motor for moving the tool support relative to the workpiece in response to the pulse signals, first means for causing the drive motor to be actuated to move the tool support away from the workpiece, detecting means actuated when the tool support is moved into an original position and second means responsive to the actuation of the detecting means for causing the drive motor to be actuated to move the tool support toward the workpiece.