Oscillator tuning and control over large range

Claim 1

A PRECISION TUNING SYSTEM COMPRISING: MEANS FOR PROVIDING A FREQUENCY STABILIZED SIGNAL; TUNABLE MEANS FOR PROVIDING A PERIODIC SIGNAL WHOSE FREQUENCY MAY BE VARIED; CIRCUIT MEANS RESPONSIVE TO THE PHASE DIFFERENCE BETWEEN THE FREQUENCY STABILIZED SIGNAL AND THE PERIODIC SIGNAL FOR GENERATING AN AUDIO-FREQUENCY SIGNAL WHICH IS CONVERTED INTO A SINGLE TRIGGER SIGNAL WHEN THE AFOREMENTIONED SIGNALS ARE IN FREQUENCY COINCIDENCE; CONTROL MEANS COUPLED TO SAID CIRCUIT MEANS AND SAID TUNABLE MEANS, SAID CONTROL MEANS BEING ADAPTED TO TUNE SAID TUNABLE MEANS THROUGH ONE AND MORE FREQUENCY COINCIDENCES AND FOR COUNTING THE TRIGGER SIGNALS, SAID CONTROL MEANS BEING FURTHER ADAPTED TO TERMINATE SAID TUNING OPERATION WHEN A PREDETERMINED NUMBER OF TRIGGER SIGNALS ARE RECEIVED, THEREBY ADJUSTING SAID TUNABLE MEANS TO A DESIRED FREQUENCY WITHIN THE AFOREMENTIONED BAND OF FREQUENCIES.