Abstract: A screw machine has a headstock provided with an openable and closable chuck rotatable at high speed and having a throughgoing aperture of cross-sectional shape complementary to that of a bar to be machined in the screw machine. A feed apparatus for this machine comprises means for detecting the rotational speed of the chuck and for generating a speed output when the rotational speed lies within a predetermined range. In addition, a pusher is provided which only advances the bar into the aperture of the chuck after generation of the output. This pusher is engageable with an abutment that is only displaced out of its way when the speed output is generated. Furthermore the apparatus generates a position output when the bar is properly in place and has a timer which withdraws the bar from the chuck if within a predetermined time limit after generation of the speed output the position output is not generated, indicating that the apparatus is unable to load the bar.

Abstract: An arrangement for feeding rod-shaped workpieces to a machine tool comprises an elongated hollow guide member for accommodating a respective workpiece therein. A support structure extends longitudinally of the guide member and surrounds the same with spacing, and a plurality of elongated elastically yieldable members extends longitudinally of the guide member in the spacing and supports the guide member in the support structure. The oscillations to which the guide member is subjected during the operation of the arrangement are damped by the elastically yieldable members so that they are not transmitted to the support structure. The elastically yieldable members may be hollow tubes into which a pressurized medium is introduced, and the pressure of the medium may be adjusted so as to correspond to the various working conditions.

Abstract: The present invention relates to a programmable device for mechanically executing work operations, more particularly, to a handling device consisting of a series of mutually coupled rotating and/or displacement elements, wherein the moving part situated at the one end is associated with a production unit while the moving part situated at the other end has a tool mounted thereon, for example, a gripper means for handling workpieces, paint spray guns for applying paint, welding rods for resistance welding, etc. The moving elements are designed to move various loads into predetermined positions at given speeds.

Abstract: An arrangement for feeding rod-shaped workpieces to a machine tool comprises an elongated hollow guide member for accommodating a respective workpiece therein. A support structure extends longitudinally of the guide member and surrounds the same with spacing, and a plurality of elongated elastically yieldable members extends longitudinally of the guide member in the spacing and supports the guide member in the support structure. The oscillations to which the guide member is subjected during the operation of the arrangement are damped by the elastically yieldable members so that they are not transmitted to the support structure. The elastically yieldable members may be hollow tubes into which a pressurized medium is introduced, and the pressure of the medium may be adjusted so as to correspond to the various working conditions.