Synchronizing signal deriving means

Claim 1

IN A COMMUNICATION SYSTEM FOR TRANSMITTING AND RECEIVING A COMPOSITE SIGNAL COMPRISING: A PLURALITY OF TONE SIGNALS HAVING DIFFERENT FREQUENCIES SPACED APART BY INTEGRAL MULTIPLES OF A DIFFERENCE FREQUENCY FS WITH THE LOWEST TONE SIGNAL FREQUENCY F1 BEARING A RATIO N/2 TO FS, WHERE N IS AN INTEGER; EACH OF SAID TONE SIGNALS BEING DIVIDED INTO SECTIONS OF EQUAL AND CONSECUTIVE TIME INTERVALS KNOWN AS PHASORS, WITH THE PHASORS OF EACH TONE SIGNAL HAVING PHASE RELATIONSHIPS WITH A REFERENCE PHASE INDICATIVE OF THE INFORMATION CONTAINED THEREIN; AND THE PHASORS OF EACH OF SAID TONE SIGNALS HAVING COMMON PHASE TRANSITION POINTS AND A REPETITION RATE PERIOD GREATER THAN THE PERIOD OF THE DIFFERENCE FREQUENCY FS; MEANS FOR PRODUCING A SYNCHRONIZING SIGNAL HAVING A FREQUENCY EQUAL TO THE PHASOR REPETITION RATE, SAID SYNCHRONIZING SIGNAL PRODUCING MEANS COMPRISING; MEANS FOR RECEIVING SAID COMPOSITE SIGNAL, DELAY MEANS FOR DELAYING SAID COMPOSITE SIGNAL BY A TIME INTERVAL 1/FS, AND; MEANS FOR COMPARING THE DELAYED AND UNDELAYED RECEIVED COMPOSITE SIGNAL TO PRODUCE SIGNAL PULSES DURING THE CORRELATION PERIODS OF THE DELAYED AND UNDELAYED COMPOSITE SIGNAL.