Time synchronization of random electrical signals

Claim 1

IN AN APPARATUS FOR INSPECTING A CONTINUOUS LENGTH OF MATERIAL FOR DEFECTS OCCURRENT AT RANDOM THEREIN, MEANS FOR CONVEYING SAID MATERIAL LENGTHWISE PAST AN INSPECTION STATION, INSPECTION MEANS LOCATED AT SAID INSPECTION STATION AND RESPONSIVE TO THE PRESENCE OF SAID DEFECTS FOR GENERATING AN ELECTRICAL SIGNAL PULSE SIGNALING THE PASSAGE OF EACH OF SAID DEFECTS, MEANS RESPONSIVE TO THE MOVEMENT OF SAID MATERIAL FOR GENERATING AN ELECTRICAL MARKER PULSE EACH TIME A SELECTED LENGTH OF SAID MATERIAL HAS PASSED SAID INSPECTION STATION, A TRANSMISSION PATH FOR SAID MARKER PULSES, MEANS FOR BLOCKING SAID PATH IMMEDIATELY FOLLOWING THE TRANSMISSION THERETHROUGH OF A MARKER PULSE, MEANS FOR UNBLOCKING SAID PATH UPON THE OCCURRENCE OF A SIGNAL PULSE, MEANS FOR GENERATING A RECORD OF EACH SIMULTANEOUS OCCURRENCE OF A MARKER PULSE AND A SIGNAL PULSE, MEANS FOR STORING SAID RECORD UNTIL THE NEXT BLOCKING ACTION HAS BEEN TERMINATED, MEANS OPERATIVE AFTER SAID TERMINATION OF SAID BLOCKING ACTION FOR GENERATING A RECORD PULSE FROM SAID STORED RECORD, MEANS FOR UNBLOCKING SAID TRANSMISSION PATH UPON THE OCCURRENCE OF A RECORD PULSE, AND MEANS FOR REGISTERING MARKER PULSES TRANSMITTED THROUGH SAID PATH.