Abstract: A pressure controlled cutter bit or drill bit retainer in the form of a revolving drill head with hydraulic precision adjustment of the drill bit arranged at a central extension, which is displaceable from its original position by small amounts around a pivot axis by a pressure motor, wherein this displacement occurs without any parts mechanically rubbing against each other and the dimensioning of the pressure motor and extension defining the transmission ratio conditions are selected in such a way that the travel of the drill bit guided along a curved path is greater than the travel of the pressure motor output produced by volume change, and wherein the overall volume of the pressure motor is selected to be slightly greater than the volume required for moving the pressure motor output.

Abstract: Rotating drill head with a boring bar which is swivel able by small amounts transversely to the rotational axis by fluidic means, with a base, a driven member located opposite the base, a pressure chamber arranged between the base and driven member and having a fluid inlet, and with an expanding lever gearing in a working connection with the driven member and serving for the synchronous and oppositely directed swiveling of a tool carrier and a compensating member which are constructed so as to be geometrically similar and constitute the boring bar.

Abstract: A pressure controlled cutter bit or drill bit retainer in the form of a revolving drill head with hydraulic precision adjustment of the drill bit arranged at a central extension, which is displaceable from its original position by small amounts around a pivot axis by a pressure motor, wherein this displacement occurs without any parts mechanically rubbing against each other and the dimensioning of the pressure motor and extension defining the transmission ratio conditions are selected in such a way that the travel of the drill bit guided along a curved path is greater than the travel of the pressure motor output produced by volume change, and wherein the overall volume of the pressure motor is selected to be slightly greater than the volume required for moving the pressure motor output.

Abstract: A fine adjustment device for turning tool bits in the form of a pneumatic/hydraulic converter for converting of control signals into proportional actuating or adjusting forces with a combination of an oil pump and pneumatically controlled overflow valve, whose outlet pressure is adjustable with the help of control air.

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: A revolving drill head or the like with finely adjustable tool carriers at right angles to its longitudinal axis having high rigidity material-elastic intermediate members operable by a hydraulic pressure medium supplied coaxially to the shaft of the drill head in a feed mechanism, which is positioned in fixed manner between the shaft and the tool carrier and having two flange-like connecting parts to the shaft or tool carrier connected by two axially parallel, resilient parts at right angles to the shaft axis as a parallel guide and with counter-directed, diametrically facing shaft axis parallel extensions which are symmetrical to and spaced from the shaft axis and between which is provided an expansion member as a material-elastic intermediate member in a plane at right angles to the shaft axis, each of the flange-like connecting parts has a compensating device diametrically facing with respect to the shaft axis the extension fixed thereto for compensating its unbalance in at least one relative position of

Abstract: A printer includes a printhead, a driven platen to advance the paper, which simultaneously provides counter-pressure to the printhead, and a paper-cutting bar which includes a cutting edge on which the paper can be cut. A paper compartment holds a paper supply, through which the platen is accessible for paper insertion. A cover plate or lid covers the paper compartment. In order to assure safe operation, the cutting edge of the paper-cutting bar is mounted outside of the most constricted space between the platen axle and the paper-cutting bar. The end of the paper-cutting bar includes the cutting edge thus covering the platen so that the end of the cover plate penetrates beneath or overlaps the specified end of the paper-cutting bar in the closed position.

Abstract: A pressure transducer formed as a three-dimensional body is rendered flexible in order to permit fine adjustment of a machine tool seat formed thereon by the formation of holes and slits in the transducer body which cause portions of the body to operate as spring-like webs. An expansion box is located within the transducer and a pressure transmitter separate therefrom is connected thereto to enable pressure from the transmitter to be applied to the expansion box to cause flexing of the transducer body and fine adjustment of the position of the tool seat. Because of the particular arrangement of the holes and slits in the transducer body, the tool seat is able to be moved parallel to itself during the adjustment process.