Transistorized motor reversing system

Claim 1

A MOTOR CONTROL SYSTEM COMPRISING: (A) SWITCHING MEANS COMPRISING FIRST AND SECOND TRANSISTORS OF LIKE CONDUCTIVITY TYPE, EACH OF SAID TRANSISTORS HAVING AN EMITTER, BASE AND COLLECTOR ELECTRODE, (B) SAID SWITCHING MEANS INCLUDING MEANS CONNECTING THE COLLECTOR OF SAID FIRST TRANSISTOR TO SAID SECOND TRANSISTOR WHEREBY SATURATED CONDUCTION OF SAID FIRST TRANSISTOR CUTS OFF SAID SECOND TRANSISTOR, MEANS BIASING SAID SECOND TRANSISTOR IN SATURATED CONDUCTION WHEN SAID FIRST TRANSISTOR IS CUT OFF, AND CONTROL MEANS CONNECTED TO THE BASE OF SAID FIRST TRANSISTOR, (C) SAID CONTROL MEANS COMPRISING A THIRD TRANSISTOR, THE STATE OF CONDUCTION OF WHICH CONTROLS THE STATE OF CONDUCTION OF SAID FIRST TRANSISTOR, AND MEANS INCLUDING A RESISTOR CONNECTED TO THE BASE OF SAID THIRD TRANSISTOR BIASING SAID THIRD TRANSISTOR IN SATURATED CONDUCTION, (D) A SOURCE OF DIRECT VOLTAGE CONNECTED TO THE EMITTER OF SAID FIRST TRANSISTOR, (E) A SOURCE OF OPPOSITE POLARITY, EQUAL AMPLITUDE, DIRECT VOLTAGE CONNECTED TO THE COLLECTOR OF SAID SECOND TRANSISTOR, (F) REVERSIBLE MOTIVE POWER MEANS HAVING ONE SIDE AT GROUND POTENTIAL AND THE OTHER SIDE CONNECTED IN CIRCUIT WITH THE COLLECTOR OF SAID FIRST TRANSISTOR AND THE EMITTER OF SAID SECOND TRANSISTOR, (G) INPUT CONTROL SIGNAL MEANS PRODUCING A SIGNAL THE AMPLITUDE OF WHICH VARIES FROM A REFERENCE LEVEL AS A CONDITION TO BE CONTROLLED VARIES, (H) CIRCUIT MEANS CONNECTED TO SAID INPUT CONTROL SIGNAL MEANS PRODUCING PERIODIC UNIDIRECTIONAL SIGNALS THE AMPLITUDE OF WHICH IS PROPORTIONAL TO THE AMPLITUDE OF SAID INPUT CONTROL SIGNAL, AND (I) A CAPACITOR COUPLING SAID CIRCUIT MEANS TO THE BASE OF SAID THIRD TRANSISTOR WHEREBY SAID THIRD TRANSISTOR IS PERIODICALLY CUT OFF FOR A TIME PROPORTIONAL TO THE AMPLITUDE OF SAID UNIDIRECTIONAL SIGNAL.