Single tube transmitter employing coded relaxation-type oscillator

Claim 1

A SINGLE TUBE OSCILLATOR CIRCUIT FOR RADIATING SIGNAL ENERGY HAVING THREE SIMULTANEOUSLY CONTROLLED SIGNAL FREQUENCY FUNCTIONS COMPRISING, A CONSTANTLY ENERGIZED CURRENT CONTROLLING DEVICE HAVING A CURRENT CONDUCTING ELECTRODE AND A BIASING ELECTRODE, RESONANT TANK CIRCUIT MEANS OPERATIVELY CONNECTED TO SAID CURRENT CONDUCTING ELECTRODE AND SAID BIASING ELECTRODE FOR SUSTAINING A CARRIER SIGNAL CURRENT AT A HIGH FREQUENCY, MODIFYING CIRCUIT MEANS INDUCTIVELY COUPLED TO SAID TANK CIRCUIT MEANS FOR CONTROLLING SAID BIASING ELECTRODE TO PRODUCE A LOWER FREQUENCY CURRENT COMPONENT SUPERIMPOSED ON THE CARRIER SIGNAL CURRENT, AND INTERRUPTING CIRCUIT MEANS OPERATIVELY CONNECTING SAID MODIFYING CIRCUIT MEANS TO SAID BIASING ELECTRODE THROUGH A BIAS CURRENT PATH PERIODICALLY RENDERING THE CURRENT CONTROLLING DEVICE NONCONDUCTIVE FOR A PREDETERMINED DURATION FOR INTERRUPTING RADIATIONS FROM THE TANK CIRCUIT MEANS AT A LOWEST FREQUENCY, SAID INTERRUPTING CIRCUIT MEANS INCLUDING A CAPACITOR CONNECTED IN SERIES WITH THE BIASING ELECTRODE ESTABLISHING SAID BIAS CURRENT PATH BETWEEN THE MODIFYING CIRCUIT MEANS AND THE BIASING ELECTRODE FOR A LIMITED INTERAL WHEN IN A DISCHARGE STATE, AND A DISCHARGE RESISTOR CONNECTED IN SHUNT RELATION BETWEEN THE CAPACITOR AND THE BIASING ELECTRODE FOR REGULATING THE PERIOD DURING WHICH THE CAPACITOR IS CHANGED TO PREDETERMINED SAID DURATION OF RADIATION INTERRUPTION.