Motor energizing circuit

Claim 1

IN COMBINATION, AN ELECTRIC MOTOR HAVING A MAGNETIC CIRCUIT INCLUDING A STATOR AND A ROTOR WITH AN AIR GAP THEREBETWEEN, AN ELECTRIC CIRCUIT INCLUDING A PAIR OF FIELD COILS ON SAID STATOR, A PAIR OF TRANSISTORS HAVING INPUT ELECTRODES AND OUTPUT ELECTRODES, A DIRECT VOLTAGE SOURCE, EACH OF SAID FIELD COILS BEING CONNECTED IN SERIES WITH SAID VOLTAGE SOURCE THROUGH THE OUTPUT ELECTRODES OF A CORRESPONDING ONE OF THE TRANSISTORS, A PAIR OF FEEDBACK COILS ON SAID STATOR INDUCTIVELY COUPLED WITH THE FIELD COILS, EACH OF THE FEEDBACK COILS BEING THE SOLE SOURCE OF SWITCHING VOLTAGE FOR A CORRESPONDING ONE OF THE TRANSISTORS AND BEING CONNECTED IN REGENERATIVE RELATION WITH THE INPUT ELECTRODES THEREOF AND ADAPTED TO DRIVE IT INTO ITS CURRENT SATURATION REGION WHEN IT IS SWITCHED CONDUCTIVE AND THE OTHER TRANSISTOR IS SWITCHED NON-CONDUCTIVE, THE MAGNETIC CIRCUIT BEING PROPORTIONED SO THAT IT IS MAGNETIZED TO A POINT BELOW THE KNEE OF ITS MAGNETIZATION CURVE BY THE SATURATION CURRENT OF EITHER TRANSISTOR WHEREBY THE MAGNETIC FLUX LINKING THE FEEDBACK COILS APPROACHES A LIMITING VALUE DURING THE CONDUCTIVE INTERVAL OF EACH TRANSISTOR TO CAUSE THE FEEDBACK VOLTAGE TO DECREASE AND REVERSE POLARITY TO SWITCH THE CONDUCTIVE TRANSISTOR INTO NON-CONDUCTION AND THE NON-CONDUCTIVE TRANSISTOR INTO CONDUCTION OVER REPEATED CYCLES TO PRODUCE AN ALTERNATING MAGNETOMOTIVE FORCE IN SAID MAGNETIC CIRCUIT TO ENERGIZE SAID ROTOR.