Magnetic rotation apparatus

A magnetic rotation apparatus comprising:

• a first rotor which is rotatably supported;
• a second rotor which is rotatably supported, and juxtaposed with said first rotor;
• cooperating means for enabling said first and second rotors to rotate in opposite directions;
• and
• magnet elements arranged at regular intervals on the peripheral portion of each of said first and second rotors, the number of the magnet elements arranged on the first rotor being equal to that of the magnet elements on the second rotor,
• characterized in
• that each magnet element has at least one magnetic pole located radially outward from each rotor,
• that, when the first and second rotors are rotated in a cooperating manner, any one of the magnets of the first rotor, and any of the magnets of the second rotor, which constitute a pair, move such that their magnetic poles having the same polarity approach and move away from each other periodically;
• that one of the paired magnet elements has a phase of rotation a little advanced from that of the other;
• that, when the paired magnet elements approach each other, a magnetic repulsion force is produced to exert a torque to the first rotor in one direction, and the torque of the first rotor is transmitted to the second rotor through said cooperating means, thus allowing the second rotor to rotate against a torque applied to the second rotor due to said magnetic repulsion force;
• and
• that one of at least a pair of magnet elements is provided with magnetic force switching means for changing the polarity of said one magnet element.