Load control for electric power systems

Claim 1

A LOAD CONTROL FOR AN ELECTRIC POWER SYSTEM WHICH INCLUDES A POWER PRODUCING UNIT, IN COMBINATION, A MASTER CONTROL FOR GENERATING A MASTER CONTROL SIGNAL CORRESPONDING TO THE DESIRED RATE OF SYSTEM GENERATION, A FUNCTION GENERATOR INCLUDING A CAM ANGULARLY POSITIONED IN ACCORDANCE WITH A MEASURE OF THE RATE OF OPERATION OF THE POWER PRODUCING UNIT AND A DIFFERENTIAL TRANSFORMER HAVING ELEMENTS RELATIVELY POSITIONED BY SAID CAM TO THEREBY PRODUCE A MACHINE SIGNAL HAVING A FIRST FUNCTIONAL RELATIONSHIP TO THE OUTPUT OF THE POWER PRODUCING UNIT, A FIRST ALGEBRAIC SUMMING RELAY RESPONSIVE TO THE MASTER CONTROL SIGNAL AND THE MACHINE SIGNAL FOR PRODUCING UNIT, A FIRST ALGEBRAIC SUMMING RELAY RESPONSIVE TO THE MASTER CONTROL SIGNAL AND THE MACHINE SIGNAL FOR PRODUCING A FIRST SIGNAL IN ACCORDANCE WITH THE DIFFERENCE BETWEEN SAID MASTER AND MACHINE SIGNALS, A RESET RELAY FOR GENERATING A SECOND SIGNAL PROPORTIONAL TO THE TIME INTEGRAL OF THE FIRST SIGNAL, A SECOND ALGEBRAIC SUMMING RELAY FOR PRODUCING A THIRD SIGNAL PROPORTIONAL TO THE DIFFERENCE BETWEEN THE MASTER CONTROL SIGNAL AND THE SECOND SIGNAL, MEANS RESPONSIVE TO SAID THIRD SIGNAL ADJUSTING THE RATE OF OPERATION OF SAID POWER PRODUCING UNIT, MEANS OPERATED BY SAID FUNCTION GENERATOR TO PRODUCE A FOURTH SIGNAL HAVING A SECOND FUNCTIONAL RELATIONSHIP TO THE OUTPUT OF THE POWER PRODUCING UNIT, MEANS FOR PRODUCING A FIFTH SIGNAL CORRESPONDING TO SAID FOURTH SIGNAL BIASED BY A PREDETERMINED AMOUNT, AND MEANS OPERATED BY SAID FOURTH SIGNAL AT A PREDETERMINED VALUE THEREOF FOR RENDERING THE FIRST ALGEBRIC SUMMING RELAY UNRESPONSIVE TO THE MASTER CONTROL SIGNAL AND SAID MACHINE SIGNAL AND RENDERING SAID RELAY RESPONSIVE TO A SIXTH SIGNAL HAVING A CONSTANT VALUE AND SAID FIFTH SIGNAL.