Self-starting synchronous motor of high torque output

Claim 1

IN A SYNCHRONOUS MOTOR, THE COMBINATION WITH A FIELD HAVING TWO SETS OF FIELD POLES ARRANGED CIRCULARLY ABOUT AN AXIS OF WHICH SUCCESSIVE POLES OF ONE SET ALTERNATE WITH SUCCESSIVE POLES OF THE OTHER SET; AN ASSOCIATED FIELD COIL ADAPTED ON ENERGIZATION TO PRODUCE OPPOSITE INSTANTANEOUS POLARITIES IN SAID POLE SETS, OF A PERMANENTMAGNET ROTOR TURNABLE ABOUT SAID AXIS AND HAVING SERIES OF POLE FACES OF OPPOSITE POLARITIES, RESPECTIVELY, SO ARRANGED THAT ON ENERGIZATION AND DEENERGIZATION OF SAID COIL SAID ROTOR WILL HAVE RUNNING AND REPOSE POSITIONS OF MINIMUM RELUCTANCE, RESPECTIVELY, IN ANY OF WHICH EACH POLE FACE OF EACH SERIES CONFRONTS ONE FIELD POLE ONLY OF A RESPECTIVE SET, WITH NONE OF SAID POLE FACES BEING OF SMALLER PERIPHERAL WIDTHS THAN SAID FIELD POLES AND THE OVERALL PITCH RELATION OF SAID POLE FACES BEING DIFFERENT FROM THE OVERALL PITCH RELATION OF THEIR CONFRONTING FIELD POLES TO PRODUCE IN SAID ROTOR IN ANY POSITION THEREOF ADEQUATE TORQUE FOR ITS SELF-START ON ENERGIZATION OF SAID COIL.