Silicon controlled rectifier circuit with firing means employing serially connected linear and saturable reactors

Claim 1

A PHASE CONTROL AND SWITCHING CIRCUIT FOR CONTROLING THE INTERVAL OF CURRENT CONDUCTION FROM AN ALTERNATING CURRENT SUPPLY DURING EACH HALF CYCLE, SAID CIRCUIT COMPRISING A PAIR OF INPUT TERMINAL LEADS FOR CONNECTION ACROSS THE ALTERNATING CURRENT SUPPLY; AT LEAST ONE SWITCHING TERMINAL LEAD FOR CONNECTION TO A LOAD; A PAIR OF CONTROLLED RECTIFIERS IN CONNECTED INVERSE PARALLEL RELATIONSHIP; CIRCUIT MEANS CONNECTING SAID CONTROLLED RECTIFIERS IN CIRCUIT WITH SAID SWITCHING TERMINAL LEAD AND ONE OF SAID INPUT LEADS SO THAT SAID CONTROLLED RECTIFIERS CONTROL THE INTERVAL OF CURRENT CONDUCTION FROM ONE OF SAID INPUT LEADS TO THE TERMINAL LEAD DURING EACH HALF CYCLE OF THE ALTERNATING CURRENT SUPPLY; EACH OF SAID CONTROLLED RECTIFIERS HAVING AN ANODE, CATHODE AND GATE ELECTRODE; A SATURABLE REACTOR AND A LINEAR REACTOR CONNECTED IN SERIES CIRCUIT RELATIONSHIP; A PAIR OF WINDINGS INDUCTIVELY COUPLED ON ONE OF SAID REACTORS, ONE OF SAID WINDINGS BEING CONNECTED IN CIRCUIT ACROSS THE GATE AND CATHODE OF ONE OF SAID CONTROLLED RECTIFIERS AND THE OHER OF SAID WINDINGS BEING CONNECTED IN CIRCUIT ACROSS THE GATE AND CATHODE OF THE OTHER OF SAID CONTROLLED RECTIFIERS, SAID SATURABLE REACTOR WHEN SATURATING CAUSING A PULSE OF CURRENT TO FLOW THROUGH SAID WINDINGS OF SAID REACTORS; A FIRST CAPACITOR AND A SECOND CAPACITOR CONNECTED IN SERIES CIRCUIT RELATIONSHIP ACROSS SAID INPUT TERMINAL LEADS; A THIRD CAPACITOR AND A VARIABLE RESISTANCE MEANS CONNECTED IN SERIES CIRCUIT RELATIONSHIP ACROSS SAID FIRST AND SECOND CAPACITOR; CIRCUIT MEANS CONNECTING SAID SERIALLY CONNECTED SATURABLE REACTOR AND LINEAR REACTOR WITH SAID FIRST CAPACITOR AND THIRD CAPACITOR, SAID VARIABLE RESISTANCE MEANS CONTROLLING THE PHASE ANGLE OF THE VOLTAGE APPLIED ACROSS THE SERIALLY CONNECTED SATURABLE REACTOR AND LINEAR REACTOR THEREBY CONTROLLING THE POINT IN EACH HALF CYCLE WHEN SAID SATURABLE REACTOR IS SATURATED AND SAID CONTROLLED RECTIFIERS ARE FIRED TO CONTROL THE INTERVAL OF CURRENT CONDUCTION FROM ONE OF SAID INPUT LEADS TO THE SWITCHING TERMINAL LEAD.