Frequency trancking and deviation indicating system including signal storage means

Claim 2

A FREQUENCY TRACKING SYSTEM COMPRISING: A SIGNAL SOURCE; VOLTAGE CONTROLLED OSCILLATOR MEANS; RESPECTIVE SQUARE WAVE DEVELOPING NETWORKS COUPLED TO SAID SOURCE AND TO SAID OSCILLATOR MEANS; DETECTING MEANS TO DEVELOP RESPECTIVE D.-C. VOLTAGES FROM THE OUTPUTS OF SAID NETWORKS; MEANS TO APPLY A CONTROL VOLTAGE TO SAID OSCILLATOR MEANS THAT REPRESENTS THE DIFFERENCE BETWEEN SAID RESPECTIVE VOLTAGES, SAID MEANS INCLUDING A RESISTIVE BALANCE NETWORK CONNECTED BETWEEN SAID DETECTING MEANS; A COMPUTING AMPLIFIER COUPLED TO SAID BALANCE NETWORK; AND SWITCH MEANS FOR COUPLING SAID COMPUTING AMPLIFIER TO SAID OSCILLATOR MEANS.

Claim 3

IN A FREQUENCY TRACKING AND INDICATING SYSTEM, THE COMBINATION OF: AN OSCILLOSCOPE HAVING SWEEP, VERTICAL AND BLANKING CONTROL CIRCUITS FOR AN ELECTRON BEAM, WITH AND BLANKING CONTROL CIRCUIT NORMALLY PREVENTING THE ELECTRON BEAM FROM BEING VIEWED; A SOURCE OF SIGNALS OF VARYING AND RELATIVELY HIGH FREQUENCY; MEANS COUPLED TO THE SWEEP CONTROL CIRCUIT FOR CYCLICALLY MOVING THE BEAM HORIZONTALLY AT A RELATIVELY LOW FREQUENCY; MEANS FOR COUPLING SAID SOURCE TO THE BLANKING CONTROL CIRCUIT FOR UNBLANKING SAID BEAM IN SYNCHRONISM WITH SAID RELATIVELY HIGH FREQUENCY; A CONTINUOUSLY RUNNING OSCILLATOR HAVING A VARIABLE OUTPUT FREQUENCY; MEANS FOR INTERMITTENTLY COUPLING SAID SOURCE TO SAID OSCILLATOR FOR CHANGING THE OSCILLATOR OUTPUT FREQUENCY TO THAT OF SAID SOURCE; AND MEANS FOR COUPLING SAID OSCILLATOR OUTPUT TO THE VERTICAL CIRCUIT FOR CYCLICALLY MOVING THE BEAM VERTICALLY AT THE OSCILLATOR OUTPUT FREQUENCY, WITH A HORIZONTAL PATTERN ON SAID OSCILLOSCOPE INDICATING FREQUENCY COINCIDENCE BETWEEN SAID SOURCE AND OSCILLATOR AND A SWEKED PATTERN INDICATING FREQUENCY DEVIATION.

Claim 4

IN A FREQUENCY TRACKING AND INDICATING SYSTEM, THE COMBINATION OF: AN OSCILLOSCOPE HAVING SWEEP, VERTICAL AND BLANKING CONTROL CIRCUITS FOR AN ELECTRON BEAM, WITH AND BLANKING CONTROL CIRCUIT NORMALLY PREVENTING THE ELECTRON BEAM FROM BEING VIEWED; A SOURCE OF SIGNALS OF VARYING AND RELATIVELY HIGH FREQUENCY; MEANS COUPLED TO THE SWEEP CONTROL CIRCUIT FOR CYCLICALLY MOVING THE BEAM HORIZONTALLY AT A RELATIVELY LOW FREQUENCY; MEANS FOR COUPLING SAID SOURCE TO THE BLANKING CONTROL CIRCUIT FOR UNBLANKING SAID BEAM IN SYNCHRONISM WITH SAID RELATIVELY HIGH FREQUENCY; A CONTINUOUSLY RUNNING OSCILLATOR HAVING A VARIABLE OUTPUT FREQUENCY; MEANS FOR INTERMITTENTLY COUPLING SAID SOURCE TO SAID OSCILLATOR FOR CHANGING THE OSCILLATOR OUTPUT FREQUENCY TO THAT OF SAID SOURCE; AND MEANS FOR COUPLING SAID OSCILLATOR OUTPUT TO THE VERTICAL CIRCUIT FOR CYCLICALLY MOVING THE BEAM VERTICALLY AT THE OSCILLATOR OUTPUT FREQUENCY, WITH A HORIZONTAL PATTERN ON SAID OSCILLOSCOPE INDICATING FREQUENCY COINCIDENCE BETWEEN SAID SOURCE AND OSCILLATOR AND A SWEKED PATTERN INDICATING FREQUENCY DEVIATION.