Self-starting rotors for synchronous reaction motors

Claim 1

IN A SELF-STARTING SYNCHRONOUS MOTOR, THE COMBINATION WITH A FIELD HAVING TWO SETS OF FIELD POLES ARRANGED CIRCULARLY ABOUT AN AXIS OF WHICH SUCCESSIVCE POLES OF ONE SET ALTERNATE WITH SUCCESSIVE POLES OF THE OTHER SET, AND AN ASSOCIATED FIELD COIL ADAPTED ON ENERGIZATION TO PRODUCE OPPOSITE INSTANTANEOUS POLARITIES IN SAID POLE SETS, OF A PERMANENT-MAGNET ROTOR TURNABLE ABOUT SAID AXIS AND HAVING ON ITS PERIPHERY POLARIZED AND NON-POLARIZED AREAS OF PERIPHERAL WIDTHS OF WHICH SAID POLARIZED AREAS ARE POLE FACES AT LEAST PART OF WHICH ARE OF LARGER PERIPHERAL WIDTH THAN THE FIELD POLES, WITH SUCCESSIVE ONES OF SAID POLE FACES BEING OF OPPOSITE POLARITIES AND THE NUMBER OF POLE FACES OF ONE POLARITY BEING EQUAL TO THE NUMBER OF POLE FACES OF ONE POLARITY, AND SAID NON-POLARIZED AREAS DIVIDE SAID POLE FACES INTO SPACED GROUPS, WITH SAID AREAS HAVING AN OVERALL PITCH RELATION DIFFERENT FROM THAT OF THE FIELD POLES AND BEING OF SUCH PERIPHERAL WIDTHS THAT SUCCESSIVE POLE FACES OF EACH GROUP CONFRONT SUCCESSIVE FIELD POLES IN ANY ROTOR POSITION AND SAID POLE FACES HAVE IN ANY ROTOR REPONSE POSITION ADEQUATE OVERALL UNBALANCE RELATIVE TO THE FIELD POLES FOR A SELFSTART OF THE ROTOR ON REENERGIZATION OF SAID COIL.