Detection of bi-phase digital signals

Claim 1

IN A SYSTEM FOR TRANSFERRING DIGITAL INFORMATION FROM ONE APPARATUS TO ANOTHER WHEREIN ONE BIT IS REPRESENTED BY A POSITIVE EXCURSION FOLLOWED BY A NEGATIVE EXCURSION FROM A DATUM AND ANOTHER BIT IS REPRESENTED BY A NEGATIVE EXCURSION FOLLOWED BY A POSITIVE EXCURSION FROM A DATUM, IN DIFFERENT HALF WAVEFORM PERIODS, WITH SUCH PERIODS OF CONSTANT LENGTH, A DEMODULATOR FOR SUCH WAVEFORMS COMPRISING FIRST MEANS FOR DELAYING THE RECEIVED WAVE FORMS BY ONEHALF OF A WAVE FORM PERIOD TO FORM A DELAYED OUTPUT, SECOND MEANS FOR INVERTING OEN OF SAID DELAYED OUTPUT AND THE RECEIVED WAVEFORMS AND ADDING THE RESULTANT TO SAID RECEIVED WAVEFORMS TO FORM A COMPOSITE VOLTAGE WAVE, THIRD MEANS INCLUDING A PAIR OF THREWSHOLD DETECTORS RESPONSIVE TO OPPOSITE POLARITY VOLTAGES EXCEEDING A PREDETERMINED THRESHOLD VALUE TO DELIVER AN OUTPUT WHEN NOT INHIBITED THEREFROM, SAID COMPOSITE WAVE BING SUPPLIED TO EACH OF SAID THRESHOLD DETECTORS, AND FOURTH MEANS CONNECTED TO THE OUTPUTS OF SAID THIRD MEANS OPERABLE UPON RECEIPT OF AN INPUT THEREFROM TO INHIBIT SAID THIRD MEANS FROM DELIVERING AN OUTPUT FOR AN INTERVAL OF APPROXIMATELY THREE-QUARTERS TO ONE WAVEFORM PERIOD THEREAFTER.