Tap changing transformer voltage regulating system

Claim 1

IN AN APPARATUS FOR AUTOMATIC VOLTAGE CONTROL INCLUDING FIRST AND SECOND VARIABLE IMPEDANCE DEVICES FOR INTERCONNECTION BETWEEN A POWER SUPPLY AND AN ELECTRICAL LOAD WHEREBY THE VOLTAGE APPLIED BY SAID POWER SUPPLY TO SAID LOAD IS A FUNCTION OF THE IMPEDANCE OF EACH SAID DEVICE, THE IMPROVEMENT WHICH INCLUDES (A) A FIRST SENSING DEVICE ASSOCIATED WITH THE SECOND VARIABLE IMPEDANCE DEVICE TO BE ACTUATED THEREBY AT A PREDETERMINED MAXIMUM EFFECTIVE IMPEDANCE THEREOF, (B) A SECOND SENSING DEVICE ASSOCIATED WITH SAID SECOND IMPEDANCE DEVICE TO BE ACTUATED THEREBY AT A PREDETERMINED MINIMUM EFFECTIVE IMPEDANCE THEREOF, (C) A DRIVE MECHANISM CONNECTED TO SAID FIRST IMPEDANCE DEVICE ACTUABLE TO CHANGE THE EFFECTIVE IMPEDANCE OF SAID FIRST IMPEDANCE DEVICE, (D) SAID FIRST SENSING DEVICE BEING CONNECTED TO SAID DRIVE MECHANISM TO ACTUATE SAID DEVICE MECHANISM TO INCREASE THE EFFECTIVE IMPEDANCE OF SAID FIRST IMPEDANCE DEVICE UPON ACTUATION OF SAID FIRST SENSING DEVICE, (E) SAID SECOND SENSING DEVICE BEING CONNECTED TO SAID DRIVE MECHANISM TO ACTUATE SAID DRIVE MECHANISM TO DECREASE THE EFFECTIVE IMPEDANCE OF SAID FIRST IMPEDANCE DEVICE UPON ACTUATION OF SAID SECOND SENSING DEVICE, AND (F) MEANS ASSOCIATED WITH SAID DRIVE MECHANISM ACTUATABLE TO INTERRUPT PERIODICALLY THE CHANGE OF THE EFFECTIVE IMPEDANCE OF SAID FIRST IMPEDANCE DEVICE UPON ACTUATION OF SAID DRIVE MECHANISM