Digital technique for determining unambiguous information from ambiguous information

Claim 1

A DIGITAL COUNTING MEANS FOR DETERMINING THE TRUE TIME INTERVAL OF PULSE ECHOES FOR RANGE MEASUREMENT OF A TARGET FROM MULTIPLE PULSE REPETITION FREQUENCIES OF RADAR, EACH GIVEN AMBIGUOUS TIME INTERVAL COUNTS COMPRISING: A PLURALITY OF DITITAL COUNTERS CORRESPONDING IN NUMBER TO THE PULSE REPETITION FREQUENCIES; MEANS SETTING EACH OF SAID POLURALITY OF DIGITAL COUNTERS IN ACCORDANCE WITH THE AMBIGUOUS COUNT OF EACH CORRESPONDING PULSE REPETITION FREQUENCY; A FINAL DIGITAL COUNTER; FIRST MEANS APPLYING PULSES TO SAID PLURALITY OF DIGITAL COUNTERS AND TO SAID FIRST DIGITAL COUNTER, SAID PLURALITY OF DIGITAL COUNTERS COUNTING SAID PULSES FROM SAID AMBIGUOUS COUNT IN EACH TO PREDETERMINED COUNT OF EACH AT WHICH TIME THE RESPECTIVE COUNTER WILL PRODUCE AN OUTPUT SIGNAL COUPLED AND OPERATIVE TO RESET SAID DIGITAL COUNTER TO A PREDETERMINED MODULO COUNT, REPEATED COUNTING IN EACH SAID DIGITAL COUNTER CONTINUING UNTIL A CONICIDENCE OF OUTPUT SIGNALS OCCURS FOR ALL DIGITAL COUNTERS PRODUCING A COINCIDENCE SIGNAL; AND SECOND MEANS CONTROLLED BY SAID COINCIDENCE SIGNAL TO BLOCK FURTHER APPLICATION OF SAID PULSES TO SAID FINAL DIGITAL COUNTER WHEREBY THE FINAL COUNT OF SAID FINAL DIGITAL COUNTER IS AN UNAMBIGUOUS COUNT OF PULSES REPRESENTING A TIME INTERVAL.