Self-starting transistor converter with overload protection

Claim 1

A VOLTAGE CONVERTER COMPRISING: AN OSCILLATOR COMPOSED OF AT LEAST ONE OSCILLATOR TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELECTRODES, A TRANSFORMER HAVING A PRIMARY WINDING AND A TWO-PART FEEDBACK WINDING, SAID PRIMARY WINDING BEING CONNECTED BETWEEN SAID EMITTER AND COLLECTOR ELECTRODES IN SERIES WITH A SOURCE OF DIRECT-CURRENT INPUT VOLTAGE, ONE OF SAID PARTS OF SAID FEEDBACK WINDING BEING CONNECTED BETWEEN SAID BASE ELECTRODE AND ONE OF SAID EMITTER AND COLLECTOR ELECTRODES, AN OUTPUT CIRCUIT COUPLED TO SAID OSCILLATOR, MEANS CONNECTED BETWEEN SAID BASE ELECTRODE AND SAID SOURCE FOR SUPPLYING A FORWARD BIAS CURRENT TO SAID BASE ELECTRODE, SAID MEANS INCLUDING AN AUXILIARY TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELECTRODES, THE EMITTER ELECTRODE OF THE AUXILIARY TRANSISTOR BEING CONNECTED TO THE BASE ELECTRODE OF THE OSCILLATOR TRANSISTOR, THE COLLECTOR ELECTRODE OF THE AUXILIALRY TRANSISTOR BEING COUPLED TO SAID SOURCE, THE BASE ELECTRODE OF SAID AUXILIARY TRANSISTOR BEING CONNECTED TO ONE END OF THE SECOND OF SAID PARTS OF SAID FEEDBACK WINDING, THE OTHER END OF SAID SECOND PART BEING COUPLED TO ONE TERMINAL OF SAID SOURCE, THE SAID TWO PARTS OF SAID FEEDBACK WINDING HAVING VOLTAGES INDUCED THEREIN SUCH THAT THE OSCILLATION VOLTAGES ACROSS SAID ONE PART ARE IN PHASE OPPOSITION TO THOSE ACROSS SAID SECOND PART, THE CONDUCTIVITY OF SAID AUXILIARY TRANSISTOR SUDDENLY DECREASING WHEN THE AMPLITUDE OF THE OSCILLATOR VOLTAGE ACROSS SAID SECOND PART OF SAID FEEDBACK WINDING FALLS BENEATH A PREDETEMININED VALUE THEREBY SUDDENLY REDUCING SAID FORWARD BIAS CURRENT WHEN A LOAD CURRENT FLOWING THROUGH SAID OUTPUT CIRCUIT INCREASES BEYOND A SECOND PREDETERMINDED VALUE.