US Patent 7233087 Electromagnetically driven rotary motor

Electric energy from a battery is employed to shift the permanent magnetic field located in a generator. A spring housing is located distal from the generator. An outer magnet housing enclosing an inner rotating magnetic housing is positioned between the generator and the spring housing. A shaft is integral with and turns with the inner magnetic housing. An end of the shaft distal from the inner magnetic housing passes through the generator and is actuated by a sensor mounted over the shaft end.