Abstract: A system for extracting useful energy from sea currents. A pair of drag inducing devices is disposed in the sea current, and connected by cables to a windlass at a location upstream of the drag devices. Each drag device has a selectably variable drag resistance in the sea current, and the drag devices are controlled so as to reciprocate toward and away from the upstream location. The reciprocating movement of the drag devices is converted into rotary motion by the windlass, and the rotary motion is used to perform useful work.

Abstract: A generator capable of producing electric current includes at least one stationary permanent magnet or electromagnet aligned with at least one stationary core of non-permanent magnetic material provided with an induction field coil winding. The poles of the aligned magnet and core face one another on opposite sides of a magnetic flux field suppressor in the form of a rotary disc. This disc has alternating equal width sectors of a magnetic material and sectors of a non-magnetic material, the former being comprised of a plurality of magnetic sheets interleaved with thin strips of non-magnetic material.

Abstract: A motor utilizing permanent magnets or electromagnets wherein the magnets are arranged with like poles facing one another in a normally repelling position. A magnetic flux field suppressor having a non-magnetic portion and a magnetically permeable portion is disposed between the magnets for repeatedly causing a magnetic repelling and attracting action as each portion of the suppressor is repeatedly moved into alignment between like poles of the magnets. The magnetically permeable portion is comprised of a plurality of magnetically permeable sheets interleaved with thin layers of a non-magnetic material. During the attracting action the magnetic flux lines of each magnet are conducted within a confined pathway by the sheets as they are directed therethrough between the magnet poles. The motor may be constructed for both reciprocating and rotary operation.