Abstract: An assembly head for handling devices for programmed automatic mounting of components on a workpiece, in particular for assembling electronic components on printed circuit boards, comprises a sleeve which slides longitudinally in the central bore of a rotary star mounted in the assembly head, at least one pair of tongs which pivot in the direction of a suction pipette arranged at the lower end of the sleeve and which hold and adjust the components, and an ejection device which is guided in the sleeve and actuated by a transmission mechanism in synchronization with the movement of the sleeve so as to eject a component held by the assembly head and to stop the suction of the suction pipette. The ejection device guided in the sleeve can be actuated by a control element acted on by a tensile load.

Abstract: This invention relates to a self-aligning bearing for a precision measurement pendulum, in which, between the pendulum and a housing, there are two magnetic bearings, one each on either side of the pendulum, each of which has a bearing ring magnet. The magnetic bearing on the one side of the pendulum has a pole pivot for magnetic centering, opposite which is the pole pivot of a soft iron core. The magnetic bearing located on the other side of the pendulum has a spacer as a mechanical stop, in which there is a tension wire or band stretched between the pendulum and the housing. The magnetic bearings generate magnetic fields of like or unlike polarity extending in the direction of the pendulum axis of rotation, rotationally symmetrically around the latter, and magnetic fields of unlike polarity extending radially to the pendulum axis of rotation, and radially symmetrical to it. The precision measurement pendulum can be used advantageously in a highly-sensitive bearing for measurement purposes.