System for extracting word and bit synchronization signals from pcm wave form

Claim 1

IN A CIRCUIT FOR SYNCHRONIZING THE FREQUENCY AND PHASE OF A SIGNAL GENERATOR IN ACCORDANCE WITH THE RECEPTION OF SPECIFIED RECURRENT PULSES OF AN INCOMING PULSE TRAIN, MEANS COUPLED TO RECEIVE SAID INCOMING PULSED TRAIN FOR DERIVING FROM EACH PULSSE THEREOF SIMULTANEOUS PULSES OF ALTERNATE POLARITY, PLURAL GATING MEANS, EACH OF SAID GATING MEANS BEING EFFECTIVE WHEN ENERGIZED TO PASS PULSES OF EITHER POLARITY, MEANS FOR APPLYING ONLY THAT PULSE OF SAID SIMULTANEOUS PULSES OF THE SAME POLARITY AS THAT OF THE PULSE FROM WHICH IT IS DERIVED TO ONE OF SAID GATING MEANS, MEANS FOR APPLYING ONLY THAT PULSE OF SAID SIMULTANEOUS PULSES OF OPPOSITE POLARITY TO THAT OF THE PULSE FORM WHICH IT IS DERIVED TO ANOTHER OF SAID GATING MEANS, MEANS COUPLED TO SAID PLURAL GATING MEANS FOR CONTROLLING THE OUTPUT SIGNAL FREQUENCY OF SAID SIGNAL GENERATOR IN ACCORDANCE WITH THE AMPLITUDE AND WIDTHE OF PULSES PASSED BY SAID PLURAL GATING MEANS, MEANS COUPLED TO SAID SIGNAL GENERATOR FOR PRODUCING SYNCHRONIZING PULSES SEPARATED BY INTERVALS PROPORTIONAL TO THE FREQUENCY OF SAID OUTPUT SIGNAL, AND MEANS COUPLED TO SAID LAST NAMED MEANS AND TO SAID PLURAL GATING MEANS FOR ALTERNATELY ENERGIZING SAID ONE AND SAID ANOTHER GATING MEANS TO PASS ONLY THOSE PORTIONS OF SAID PULSES APPLIED TO SAID GATING MEANS COINCIDENT IN TIME WITH SAID SYNCHRONIZING PULSES.