Reproducing system for phase modulated magnetically recorded data

Claim 1

APPARATUS FOR REPRODUCING BINARY DATA FROM A CODED SIGNAL SOURCE, COMPRISING CORRELATING MEANS CONTROLLED BY SAID SOURCE FOR PRODUCING A FIRST OR A SECOND OUTPUT SIGNAL FOR EACH BIT OF DATA FROM SAID SOURCE ACCORDING AS THE BIT REPRESENTS A FIRST OR A SECOND TRUTH VALUE, RESPECTIVELY, FIRST, SECOND AND THIRD REGISTERS EACH SETTABLE TO A FIRST AND A SECOND STATE, MEANS RESPONSIVE TO SAID FIRST OUTPUT SIGNAL FOR SETTING SAID FIRST REGISTER TO ITS FIRST STATE, MEANS RESPONSIVE TO SAID SECOND OUTPUT SIGNAL FOR SETTING SAID SECOND REGISTER TO ITS FIRST STATE, MEANS RESPONSIVE TO BOTH OF SAID SIGNALS FOR SETTING SAID THIRD REGISTER TO ITS FIRST STATE WHEN EITHER SIGNAL IS PRODUCED, DELAY MEANS CONTROLLED BY SAID THIRD REGISTER IN ITS FIRST STATE FOR PRODUCING A RESETTING SIGNAL AFTER A PREDETERMINED TIME, AND MEANS CONTROLLED BY SAID RESETTING SIGNAL FOR SETTING SAID REGISTER MEANS TO THEIR SECOND STATES.