Abstract: A gripper mechanism has opposed parallel fingers which open and close while remaining parallel to one another. The gripper mechanism is driven by a reversing electric motor which rotates a drive screw. A pair of arms support the fingers and are driven by the engagement of a pair of angled drive slots with a roller which travels along the length of the drive screw. The pair of arms are supported and guided by three parallel shafts which are arranged in a triangular configuration. A resilient drive coupling between the motor and the drive screw prevents the threads of the drive screw from locking with the roller mechanism.

Abstract: A lightweight low reluctance rotor for a motor comprises a conductive pattern of a plurality of side-by-side coils formed on a flexible printed circuit board. The flexible board is rolled into a plural layer cylindrical drum and means are provided to interconnect non-adjacent coils to form a desired winding pattern.