Voltage controlled power converter circuits

Claim 1

A SERVO-CONTROL DEVICE FOR REGULATING, ACCORDING TO A PLURALITY OF REFERENCE VOLTAGES, THE POWER APPLIED TO A PLURALITY OF LOADS, EACH ASSOCIATED WITH A RESPECTIVE ONE OF SAID REFERENCE VOLTAGES, FROM AN ASSOCIATED D.C. POWER SOURCES, SAID DEVICE COMPRISING, IN COMBINATION: (A) A PLURALITY OF SWITCHING MEANS, EACH CONNECTED IN CIRCUIT WITH ONE OF SUCH LOADS AND EACH RESPONSIVE TO SIGNALS AT A FIRST INPUT FOR CONNECTING SUCH A LOAD TO ITS ASSOCIATED SOURCE, AND RESPONSIVE TO SIGNALS AT A SECOND INPUT FOR DISCONNECTING SUCH LOAD FROM ITS ASSOCIATED SOURCE; (B) MEANS CONNECTED TO EACH SUCH LOAD FOR EMITTING A CONTROL SIGNAL ONLY WHEN THE MAGNITUDE OF THE VOLTAGE ACROSS SUCH ASSOCIATED LOAD DIFFERS FROM THE MAGNITUDE OF THE REFERENCE VOLTAGE ASSOCIATED WITH SUCH LOAD BY MORE THAN A GIVEN THRESHOLD VALUE; (C) MEANS COMMON TO ALL OF SAID SWITCHING MEANS FOR GENERATING A TRAIN OF PULSES AT A FREQUENCY HIGHER THAN THE LOWEST BASIC FREQUENCY OF THE REFERENCE VOLTAGES; AND (D) MEANS CONNECTED BETWEEN SAID MEANS FOR GENERATING A TRAIN OF PULSES AND EACH OF SAID SWITCHING MEANS AND CONNECTED TO SAID MEANS FOR EMITTING A CONTROL SIGNAL SO AS TO BE ACTUATED BY SUCH CONTROL SIGNAL FOR TRANSMITTING SAID TRAIN OF PULSES TO THE FIRST INPUT OF THE ASSOCIATED SWITCHING MEANS WHEN THE CONTROL SIGNAL FROM ITS RESPECTIVE CONTROL SIGNAL EMITTING MEANS IS PRESENT, AND TRANSMITTING THE TRAIN OF PULSES TO THE SECOND INPUT WHEN SAID CONTROL SIGNAL IS ABSENT.