Power control circuit employing semiconductor switching means responsive to the saturation of a magnetic amplifier

Claim 1

A POWER CONTROL CIRCUIT COMPRISING: (A) SEMICONDUCTOR SWITCHING MEANS FIRST AND SECOND TERMINALS, SAID SWITCHING MEANS NORMALLY EXHIBITING A HIGH IMPEDINACE BETWEEN SAID FIRST AND SECOND TERMINALS IN AT LEAST ONE DIRECTION AND BEING SWITCHED TO A QUASI STABLE STATE WHEREIN SAID DEVICE EXHIBITS A LOW IMPEDANCE IN SAID AT LEAST ONE DIRECTION BETWEEN SAID FIRST AND SECOND TERMINALS RESPONSIVE TO A CONTROL SIGNAL BEING APPLIED TO SAID SITCHING MEANS AND REMAINING IN SAID EQUAL STABLE STATE SO LONG AS HOLDING CURRENT FLOWS THROUGH SAID FIRST AND SECOND TERMINALS; (B) MEANS FOR CONNECTING SAID SWITCHING MEANS BY SAID FIRST AND SECOND TERMINALS IN SERIES WITH A LOAD AND A SOURCE OF ALTERNATING CURRENT SUPPLY VOLTAGE; (C) A CAPACITOR; (D) SWITCHING MEANS CONNECTED TO SAID CAPACITOR FOR PROVIDING A DISCHARGE PATH FOR SAID CAPACITOR RESPONSIVE TO SAID CAPACITOR BEING CHARGED TO A VOLTAGE SUFFICIENT TO CAUSE SAID SWITCHING MEANS CONNECTED THERETO TO SWITCH TO A LOW IMPEDANCE STATE; (E) MEANS EFFECTIVE RESPONSIVE TO DISCHARGE OF SAID CAPICITOR THROUGH SAID LAST MENTIONED SWITCHING MEANS FOR APPLYING TO SAID FIRST MENTIONED SWITCH-