Motor operating circuit

Claim 1

IN COMBINATION, AN ALTERNATING CURRENT MOTOR HAVING A FIELD COIL, A PAIR OF BISTABLE FLIP-FLOPS THE FIRST OF WHICH COMPRISES TWO PNP TRANSISTORS IN A COMMON-EMITTER CONFIGURATION AND THE SECOND OF WHICH COMPRISES TWO NPN TRANSISTORS IN A COMMON-EMITTER CONFIGURATION, THE COLLECTORS OF SAID PNP TRANSISTORS BEING CONNECTED, RESPECTIVELY, TO THE COLLECTORS OF SAID PAIR OF NPN TRANSISTORS, SAID FLIPFLOPS THEREBY BEING CONNECTED BACK-TO-BACK AND DEFINING A BRIDGE CIRCUIT THE INPUT TERMINALS OF WHICH ARE CONSTITUTED BY THE EMITTER JUNCTIONS AND THE OUTPUT TERMINALS OF WHICH ARE CONSTITUTED BY THE COLLECTOR JUNCTIONS, SAID FIELD COIL OF SAID MOTOR BEING CONNECTED TO SAID OUTPUT TERMINALS, A SOURCE OF D.C. VOLTAGE HAVING ITS POSITIVE TERMINAL CONNECTED TO THE EMITTER JUNCTION OF SAID PNP TRANSISTORS AND ITS NEGATIVE TERMINAL CONNECTED TO THE EMITTER JUNCTION OF SAID PNP TRANSISTORS, A STEERING CIRCUIT CONNECTED TO THE BASES OF SAID TRANSISTORS OF ONE OF SAID FLIP-FLOPS AND OSCILLATOR MEANS COUPLED TO SAID STEERING CIRCUIT AND ARRANGED TO PROVIDE TRIGGER SIGNALS OF PREDETERMINED POLARITY TO BE APPLIED SUCCESSIVELY TO THE BASES OF SAID TRANSISTORS OF SAID ONE FLIP-FLOP, WHEREBY THE SUCCESSIVE TRIGGER SIGNALS CHANGE SAID FLIP-FLOPS BACK AND FORTH BETWEEN THE STABLE STATES THEREOF SO AS TO EFFECT, WITHOUT THE INTERMEDIARY OF COUPLING TRANSFORMERS OR CAPACITORS, ALTERNATING REVERSALS OF THE CURRENT FLOW THROUGH SAID MOTOR FIELD COIL BETWEEN SAID OUTPUT TERMINALS.