Alternating current synchronous electric motors

Claim 1

A SELF-STARTING ALTERNATING CURRENT SYNCHRONOUS ELECTRIC MOTOR COMPRISING A TWO POLE PERMANENT MAGNET ROTOR AND A STATOR FIELD STRUCTURE INCLUDING AN ANNULAR ARRAY OF FIELD POLES OF WHICH ADJACENT ONES ARE OF OPPOSITE INSTANTANEOUS POLARITY, EACH ROTOR POLE SPANNING THE POLAR AREA OF APPROXIMATELY ONE-HALF OF THE STATOR FIELD AND BEING DIVIDED INTO A NUMBER OF SUB-POLES NOT LESS THAN ONE-HALF THE NUMBER OF FIELD POLES BY RADIALLY EXTENDING SLOTS, THE SUB-POLES BEING SO ARRANGED ABOUT THE MAGNETIC AXIS OF THE ROTOR THAT THE ANGLE SUBTENDED BETWEEN THE CENTERS OF ANY TWO ADJACENT SUB-POLES IN LESS THAN THE POLAR ANGLE BETWEEN THE CENTERS OF TWO MOST ADJACENT FIELD POLES OF THE STATOR OF LIKE POLARITY, WHEREBY THE ROTOR ASSUMES AN IDLE POSITION OF MINIMUM RELUCTANCE WHEN THE FIELD IS DEENERGIZED AND WILL IMMEDIATELY START INTO ROTATION WHEN THE FIELD IS ENERGIZED.