Electronic motor control system

Claim 1

AN ELECTRONIC MOTOR CONTROL SYSTEM COMPRISING: (A) FIRST CURRENT CONTROL MEANS RESPONSIVE TO A FIRST ELECTRICAL SIGNAL FOR VARIABLY CONTROLLING THE CURRENT IN A FIRST DIRECTION SUPPLIED TO A MOTOR TO BE CONTROLLED; (B) SECOND CURRENT CONTROL MEANS RESPONSIVE TO A SECOND ELECTRICAL SIGNAL FOR VARIABLY CONTROLLING THE CURRENT FLOW IN AN OPPOSITE DIRECTION SUPPLIED TO SAID MOTOR TO BE CONTROLLED; (C) FIRST SIGNAL MEANS RESPONSIVE TO THE COUNTER ELECTROMOTIVE FORCE VOLTAGE OF SAID MOTOR TO BE CONTROLLED; (D) SECOND SIGNAL MEANS RESPONSIVE TO THE COUNTER ELECTROMOTIVE FORCE VOLTAGE OF SAID MOTOR TO BE CONTROLLED FOR PROVIDING A SECOND CONTROL VOLTAGE OF A MAGNITUDE EQUAL TO SAID FIRST CONTROL VOLTAGE BUT OF OPPOSING CHARACTER; (E) SPEED SETTING CONTROL MEANS FOR PROVIDING FIRST AND SECOND SPEED SETTING VOLTAGES OF EQUAL MAGNITUDE BUT OF OPPOSITE POLARITY; (F) SPEED RESPONSIVE MEANS COUPLED TO SAID MOTOR TO BE CONTROLLED FOR PROVIDING A SPEED RESPONSIVE VOLTAGE VARYING DIRECTLY WITH THE SPEED OF SAID MOTOR TO BE CONTROLLED; (G) FIRST CONTROL CIRCUIT MEANS FOR COMBINING SAID FIRST CONTROL VOLTAGE AND SAID FIRST SPEED SETTING VOLTAGE TO PROVIDE SAID FIRST ELECTRICAL SIGNAL AND WHEREIN SAID FIRST CONTROL VOLTAGE IS POLED TO OPPOSE AN INCREASE IN CURRENT FLOW BY SAID FIRST CURRENT CONTROL MEANS AND SAID FIRST SPEED SETTING VOLTAGE IS POLED TO PRODUCE AN INCREASE IN CURRENT FLOW IN SAID FIRST CURRENT CONTROL MEANS; (H) SECOND CONTROL CIRCUIT MEANS FOR COMBINING SAID SECOND CONTROL VOLTAGE, SAID SEOCOND SPEED SETTING VOLTAGE AND SAID SPEED RESPONSIVE VOLTAGE TO PROVIDE SAID SECOND ELECTRICAL SIGNAL AND WHEREIN SAID SECOND CONTROL VOLTAGE AND SAID SECOND SPEED RESPONSIVE VOLTAGE ARE POLED TO INCREASE CURRENT FLOW BY SAID SECOND CURRENT CONTROL MEANS AND SAID SECOND SPEED SETTING VOLTAGE IS POLED TO OPPOSE CURRENT FLOW BY SAID SECOND CURRENT CONTROL MEANS.