Abstract: A motor has a plurality of pistons each of which has a ceramic magnet mounted thereon. The ceramic magnets are permanently polarized, and each piston is mounted in a cylinder to reciprocate within that cylinder. An electromagnet is located at each end of each cylinder, and is energized to alternately attract and repel the ceramic magnet so that the piston is caused to reciprocate in the cylinder under the influence of the electromagnets. Hydraulic fluid is drawn into the cylinder and is forced out of that cylinder as the piston reciprocates and this fluid is used to drive a turbine which in turn is used to generate mechanical power.

Abstract: A recording has a plurality of segments, each of which is user selectable. The recording may be on any audio delivery medium including a phonograph record or a series of cassette tapes in which each segment is recorded on one band of the record or on one of the series of cassette tapes. Each recorded segment, such as the band on the phonograph record, may be identified by a visual indicium, such as color. The recorded information of at least some of the segments instructs the user to select another segment, with the other segment identified by its visual indicium so the user can select the chosen segment. Pieces may be provided for manipulation in accordance with the interactive recording. A play field may be provided having locations thereon coded with visual indicia corresponding to the visual indicia identifying the recorded segments to reinforce the choices available to the user and to supply feedback or contributing information to the user.

Abstract: A recording has a plurality of segments, each of which is user selectable. The recording may be on a phonograph record in which each segment is recorded on one band of the record. Each recorded segment, such as the band on the phonograph record, may be identified by a visual indicium, such as color. The recorded information of at least some of the segments instructs the user to select another segment, with the other segment identified by its visual indicium so the user can select the chosen segment. An interactive visual medium such as a play field may be provided to supply feedback or contributing information to the user.