System for pulse time measurement

Claim 1

A SYSTEM FOR MEASURING THE TIME INTERVAL BETWEEN A FIRST AND A SECOND PULSE OF PREDETERMINED SPACING, SAID SYSTEM COMPRISING MEANS FOR LIMITING THE AMPLITUDE OF SAID PULSES TO A COMMON LEVEL, MEANS FOR APPROXIMATELY ADJUSTING THE DURATIONS OF SAID PULSES TO A COMMON VALUE, A VARIABLE DELAY LINE CONNECTED TO SAID PULSE ADJUSTING MEANS, A FIXED DELAY LINE COUPLED TO SAID VARIABLE DELAY LINE, THE DELAY PERIOD OF SADI FIXED DELAY LINE BEING LESS THAN THE PULSE DURATION SO THAT VOLTAGES DUE TO AN INDIVIDUAL PULSE WILL OCCUR SIMULTANEOUSLY AT THE INPUT AND OUTPUT TERMINALS OF SAID FIXED DELAY DEVICE, A FIRST AND GATE AND A SECOND AND GATE RESPECTIVELY COUPLED TO SAID INPUT AND OUTPUT TERMINALS, AND MEANS RESPONSIVE TO SAID SECOND PULSE WHEN SAID VARIABLE DELAY CORRESPONDS TO SAID PREDETERMINED PULSE SPACING FOR OPENING SAID GATES AND PASSING SAID SIMULTANEOUS VOLTAGES, AND MEANS FOR COMPARING THE PASSED VOTLAGES.