Patent ID: 8089187

Claim:
A system comprising: two rows of magnets wherein each row comprises a plurality of magnets having the same polarity for all of the magnets in that row and the two rows of magnets have opposite polarities so there is a mutual attraction between the two rows, one row being mounted on a stationary magnetic and electromagnets assembly with the magnets spaced longitudinally thereon and the other row being mounted on a rotational magnetic assembly with the magnets spaced longitudinally thereon, and wherein the two rows of magnets are arranged with different pitches, one row having one more magnet than the other to enable the rows to be indexed relative to each other and wherein the stationary magnetic and electromagnets assembly and the rotational magnetic assembly are spaced a uniform radial distance apart; at least one electromagnet associated with each magnet of one row of magnets to selectively vary the magnetic field produced by the associated magnet; and a control system to selectively energize the electromagnets to induce rotation of the rotational magnetic assembly and control speed of rotation of the rotational magnetic assembly.