Protective circuit for transistor regulators

Claim 1

IN A COMBINATION, AN ALTERNATING CURRENT GENERATOR HAVING A THREE PHASE OUTPUT WINDING AND A FIELD WINDING, A THREE PHASE FULL WAVE BRIDGE RECTIFIER NETWORK HAVING A PAIR OF D.C. OUTPUT TERMINALS AND A PLURALITY OF A.C. INPUT TERMINALS CONNECTED WITH SAID OUTPUT WINDING, A TRANSISTOR VOLTAGE REGULATING MEANS COMPRISING FIRST AND SECOND TRANSISTORS EACH HAVING EMITTER, COLLECTOR AND BASE ELECTRODES, SAID TRANSISTOR VOLTAGE REGULATING MEANS HAVING A POSITIVE TERMINAL, A FIELD TERMINAL AND A NEGATIVE TERMINAL, CONDUCTOR MEANS CONNECTING ONE SIDE OF SAID FIELD WINDING WITH THE FIELD TERMINAL OF SAID TRANSISTOR VOLTAGE REGULATING MEANS, CONDUCTOR MEANS CONNECTING SAID FIELD TERMINAL WITH THE COLLECTOR ELECTRODE OF SAID FIRST TRANSISTOR, A CIRCUIT CONNECTING SAID POSITIVE TERMINAL AND THE EMITTER ELECTRODE OF SAID FIRST TRANSISTOR INCLUDING A FIRST DIODE POLED TO CONDUCT CURRENT TOWARDS SAID EMITTER OF SAID FIRST TRANSISTOR, MEANS CONNECTING THE COLLECTOR ELECTRODE OF SAID SECOND TRANSISTOR WITH THE BASE ELECTRODE OF SAID FIRST TRANSISTOR, MEANS CONNECTING THE EMITTER ELECTRODE OF SAID SECOND TRANSISTOR TO A SIDE OF SAID FIRST DIODE OPPOSITE FROM ITS CONNECTION WITH THE EMITTER ELECTRODE OF SAID FIRST TRANSISTOR, A VOLTAGE DIVIDING NETWORK CONNECTED ACROSS THE POSITIVE AND NEGATIVE TERMINALS OF SAID TRANSISTOR VOLTAGE REGULATOR, A ZENER DIODE CONNECTED BETWEEN THE BASE ELECTRODE OF SAID SECOND TRANSISTOR AND SAID VOLTAGE DIVIDER NETWORK, A SECOND DIODE CONNECTED IN PARALLEL WITH SAID FIELD WINDING, AND A THIRD DIODE CONNECTED BETWEEN SAID POSITIVE AND NEGATIVE TERMINALS OF SAID TRANSISTOR VOLTAGE REGULATOR.