Transistor oscillator power supply system

Claim 1

A TRANSISTOR OSCILLATOR COMPRISING, FIRST AND SECOND CONDUCTORS CONNECTED WITH A SOURCE OF DIRECT CURRENT, A TRANSFORMER HAVING A PRIMARY WINDING, A SECONDARY WINDING AND A TERTIARY WINDING, SAID SECONDARY WINDING BEING ADAPTED TO FEED AN ELECTRICAL LOAD, A FIRST TRANSISTOR HAVING EMITTER, COLLECTOR AND BASE ELECTRODES, MEANS CONNECTING THE EMITTER AND COLLECTOR ELECTRODES OF SAID FIRST TRANSISTOR AND SAID PRIMARY WINDING IN SERIES ACROSS SAID CONDUCTORS, A BASE CIRCUIT FOR SAID FIRST TRANSISTOR CONNECTING THE EMITTER AND BASE ELECTRODES OF SAID FIRST TRANSISTOR AND INCLUDING IN A SERIES CONNECTION SAID TERTIARY WINDING, A SECOND TRANSISTOR HAVING EMITTER AND COLLECTOR ELECTRODES CONNECTED ACROSS THE EMITTER AND BASE ELECTRODES OF SAID FIRST TRANSISTOR WHEREBY SAID FIRST TRANSISTOR IS BIASED NON-CONDUCTIVE WHEN SAID SECOND TRANSISTOR IS BIASED CONDUCTIVE, MEANS COUPLED TO THE EMITTER AND BASE ELECTRODES OF SAID SECOND TRANSISTOR FOR BIASING SAID SECOND TRANSISTOR CONDUCTIVE WHEN THE VOLTAGE APPEARING ACROSS SAID CONDUCTORS EXCEEDS A FIRST PREDETERMINED VALUE, A THIRD TRANSISTOR HAVING EMITTER, COLLECTOR AND BASE ELECTRODES, MEANS FOR CONTROLLING THE EFFECTIVE RESISTANCE OF SAID BASE CIRCUIT, SAID LAST-NAMED MEANS INCLUDING THE EMITTER COLLECTOR CIRCUIT OF SAID THIRD TRANSISTOR, AND MEANS FOR BIASING SAID THIRD TRANSISTOR TOWARD A NONCONDUCTIVE STATE TO INCREASE THE EFFECTIVE RESISTANCE OF SAID BASE CIRCUIT WHEN THE VOLTAGE APPEARING ACROSS SAID CONDUCTORS IS ABOVE A SECOND PREDETERMINED VALUE WHICH IS LOWER THAN SAID FIRST PREDETERMINED VALUE.