Abstract: A cyclically varied magnetic field extending from a pole piece interacts with the repelling field of a superconductive member while conducting electrical current therethrough to generate a force transmitted to a frame which mounts the pole piece and the superconductive member in spaced relationship to each other forming a flux gap therebetween within which the magnetic fields interact. A power control unit regulates the variation of the magnetic field by means of an electromagnetic assembly mounted on the pole piece and controls cyclic interruption of current through the superconductive member.

Abstract: A base yieldably supporting a frame, on which an electromagnetic assembly is mounted, is fixedly secured to a more massive body to which an armature is elastically connected by coupling springs. Limit switches control initiation and termination of a timer controlled cycle during which the electromagnetic assembly is energized to cause advancement of the armature under magnetic attraction followed in sequence by acceleration of the massive body and the frame under the urge of the elastically deformed springs.