Unambiguous local phase reference for data detection

Claim 1

IN A TIME SYNCHRONOUS PHASED PULSE DATA RECEIVER CONSTRUCTED TO RECEIVE DATA PULSES CONSISTING OF A BURST OF PULSES OF FIRST FREQUENCY F1 AND WHEREIN A MARK OR A SPACE IS INDICATED BY ADVANCING OR RETRADING THE PHASE OF A PHASED PULSE BY 90* WITH RESPECT TO THE PHASE OF THE PHASED PULSE RECEIVED IMMEDIATELY PRIOR THERETO, SAID DATA PULSES HAVING A BIT RATE OF A SECOND FREQUENCY F2, MEANS FOR GENERATING A LOCAL PHASE REFERENCE SIGNAL COMPRISING GENERATING MEANS FOR GENERATING FOUR SIGNALS, ALL HAVING THE FREQUENCY F1 OF THE RECEIVED PHASED PULSE DATA BUT PHASE-SPACED APART 90* FROM EACH OTHER, MEANS FOR SELECTING ONE OF SAID FOUR OUTPUT SIGNALS OF SAID GENERATING MEANS, MEANS FOR MAINTAINING A PREDETERMINED PHASE RELATIONSHIP BETWEEN THE PHASE PULSE BEING RECEIVED AND THE SELECTED OUTPUT SIGNAL OF SAID GENERATING MEANS, SAID SELECTING MEANS RESPONSIVE TO THE PHASE RELATIONSHIP OF THE PHASED PULSE BEING RECEIVED AND THE PHASE OF THE CURRENT SELECTED OUTPUT SIGNAL TO RESPOND TO A TIMING PULSE NEAR THE END OF A PHASED PULSE TIME INTERVAL TO SELECT THE OUTPUT SIGNAL OF SAID GENERATING MEANS TO BE EMPLOYED AS THE PHASE REFERENCE FOR THE NEXT RECEIVED PHASED PULSE AND WHICH WILL HAVE THE PHASE OF THE CURRENTLY RECEIVED PHASED PULSE, AND MEANS RESPONSIVE TO THE RECEIVED DATA PULSES FOR GENERATING A TIMING PULSE HAVING A FREQUENCY EQUAL TO THE BIT RATE F2 FOR SYNCHRONIZING SAID GENERATING MEANS WITH THE BIT RATE OF THE RECEIVED DATA PULSES.