Abstract: An arrangement having a pneumatic control valve having a pneumatic motor operator, a position controller having a pneumatic output and replaceable without deteriorating the function of the motor operator, a translationally moveable valve stem between motor operator and valve, a transmission means for imaging the position of the valve stem onto a movable transmission rod of the position controller, and a yoke that rigidly joins the motor operator and the valve housing, wherein the transmission rod of the position controller and the transmission means are spatially disposed in a space of a housing closed on all sides and wherein the transmission rod of the position controller is translationally movable.

Abstract: A pneumatic drive mechanism for use with positioning apparatus or the like, having a drive housing, a drive element such as diaphragm disk, piston or the like, movably seated therein and rigidly connected to a drive rod or similar device. The drive element is responsive to compressed air on one side thereof and to forces from at least one spring operating in opposed action to the compressed air. The spring is arranged within the drive housing. The drive mechanism also has a signal processing device such as a position controller, position encoder, limit signal generator, solenoid valve or i/p converter or similar devices. The signal processing device or devices are integrated within the drive housing in an accomodation space which is free of the spring or springs, of the drive rod and of the drive element.

Abstract: A rotating head or the like having a drilling spindle and a tool carrier with an arrangement to finely adjust the tool carrier in a direction transverse to the axis of rotation of the spindle characterized by a wedge carrier which is mounted on the spindle for movement along the axis of rotation and has a bevel engaging a sliding surface of the tool carrier to shift the carrier transverse to the axis of rotation in response to movement of the wedge carrier and an arrangement for maintaining contact between the sliding surface and the bevel of the tool carrier preferably including the center of gravity of the tool carrier being offset relative to the axis of rotation on a side opposite the sliding surface so that centrifugal forces occurring during rotation of the rotating head press the sliding surface against the bevel.

Abstract: The specification describes a three-point regulator, for example of the pneumatic type, in the case of which with a drop and a rise in the measurement value of the regulation quantity after overcoming an operating distance a respective switch is operated. One switch is moved or turned by a servo-member (motor) in one direction and the other switch is moved or turned by the servo-member in the other direction. A feedback is provided which acts on both switches in such a manner that the operating distance is increased and accordingly the switched-on switch is switched off.