Transistor blocking oscillator including means for controlling the flyback waveform

Claim 1

A TRANSISTOR BLOCKING OSCILLATOR FOR PRODUCING A SIGNAL HAVING A SAWTOOTH-SHAPED WAVEFORM, COMPRISING A TRANSISTOR HVING INPUT, COMMON AND OUTPUT ELECTRODES, A TRANSFORMER HAVING PRIMARY AND SECONDARY WINDINGS, A SOURCE OF OPERATING POTENTIAL HAVING FIRST AND SECOND TERMINALS, A FIRST RESISTOR, MEANS SERIALLY CONNECTING SAID RESISTOR, THE COMMON-OUTPUT ELECTRODE PATH OF SAID TRANSISTOR, AND SAID PRIMARY WINDING BETWEEN SAID FIRST AND SECOND TERMINALS, AN UNBYPASSED SECOND RESISTOR CONNECTING SAID SECONDARY WINDING BETWEEN SAID INPUT ELECTRODE AND A POINT OF FIXED POTENTIAL, WHEREBY THE INSTANTANEOUS INPUT ELECTRODE CURRENT OF SAID TRANSISTOR FLOWS THROUGH SAID UNBYPASSED RESISTOR, CAPACITOR MEANS, MEANS CONNECTING SAID CAPACITOR MEANS BETWEEN THE END OF SAID FIRST RESISTOR CONNECTED TO SAID TRANSISTOR AND ONE OF SAID TERMINALS, WHEREBY CURRENT OF SAID CAPACITOR MEANS FLOWS THROUGH SAID PRIMARY WINDING AND TRANSISTOR DURING THE FLYBACK TIME OF SAID SIGNAL, AND OUTPUT MEANS FOR DERIVING SAID SIGNAL FROM SAID CAPACITOR MEANS, THE COMPONENTS OF SAID OSCILLATOR BEING RELATED TO SATISFY THE EXPRESSION: