Crystal controlled frequency modulated oscillator

Claim 1

A CRYSTAL CONTROLLED, FREQUENCY MODULATED OSCILLATOR CIRCUIT COMPRISING, A TRANSISTOR HAVING EMITTER, BASE AND COLLECTOR ELECTRODES, BIAS RESISTORS CONNECTED TO SAID BASE AND SAID COLLECTOR ELECTRODES, MEANS FOR SUPPLYING ENERGY VIA SAID BIAS RESISTORS SUCH THAT SAID TRANSISTOR OPERATES AS AN AMPLIFIER, A TANK CIRCUIT FOR STORING AND DISCHARGING ENERGY, A CRYSTAL RESONATOR ELEMENT CONNECTED BETWEEN SAID BASE ELECTRODE OF SAID TRANSISTOR AND ONE TERMINAL OF SAID TANK CIRCIUT, FEEDBACK MEANS CONNECTED BETWEEN SAID EMITTER ELECTRODE OF SAID TRANSISTOR AND A FURTHER TERMINAL OF SAID TANK CIRCUIT, MEANS CONNECTED IN PARALLEL WITH SAID TANK CIRCUIT TO PROVIDE VARIATIONS IN THE FREQUENCY TO WHICH SAID TANK CIRCUIT IS TUNED, SAID LAST NAMED MEANS INCLUDING A DIODE WHICH EXHIBITS DIFFERENT OPERATING CHARACTERISTICS IN RESPONSE TO THE APPLICATION OF DIFFERENT VOLTAGES BY SAID TANK CIRCUIT, MODULATING INPUT SIGNAL SUPPLYING MEANS CONNECTED TO ONE ELECTRODE OF SAID TRANSISTOR FOR VARYING THE AMPLIFICATION OF SAID TRANSISTOR SUCH THAT SIGNALS APPLIED TO SAID TANK CIRCUIT VIA SAID FEEDBACK MEANS VARY WHEREBY THE VOLTAGE SUPPLIED TO SAID MEANS CONNECTED IN PARALLEL WITH SAID TANK CIRCUIT VARIES.