Abstract: In one aspect, an actuator assembly is disclosed, which includes an input shaft, an output shaft, and a limited angle actuator that is coupled to the input shaft for rotating the input shaft to generate an input torque profile over an input stroke. A rotatable input element having a first cam profile is adapted to couple to the input shaft to rotate therewith, and a rotatable output element having a second cam profile is coupled to the output shaft to rotate with that shaft. The actuator assembly further includes at least one coupling element for rotationally coupling the rotatable input element to the rotatable output element to transfer a rotary motion of the input shaft to the output shaft to generate an output torque profile over an output stroke. The first and second cam profiles are configured such that the output profile is different than the input profile.

Abstract: A single phase, rotary electromagnetic actuator comprising first and second stator assemblies, located in oppositely facing spaced apart positions along a common central axis, permits a magnetized disc magnet rotor to rotate about the common axis free of any magnetic attractive forces normally tending to move the disc magnet longitudinally along the axis, or alternatively to be located in a position to create a desired longitudinal attractive force. The entire assembly is maintained in operative positions by a circular belt which provides an inward facing lip on each side of which the stator assemblies are seated and which determines the magnetic airgap spacing for the disc. The invention may be implemented as a servo-actuator by the inclusion of an angular position sensor that uses the actuator rotor as the magnetic field emitter, and a receiver for the magnetic field and its contacts, located in the belt lip.