Echo ranging and recording apparatus

Claim 1

THE METHOD OF GRAPHICALLY RECORDING THE DISTANCE TO SOUND REFLECTING OBJECTS IN A MEDIUM WHICH COMPRISES: GENERATING A SERIES OF TIMING PULSES HAVING A REPETITION RATE NUMERICALLY RELATED TO THE VELOCITY OF SOUND IN A MEDIUM; TRANSMITTING FIRST AND SECOND ACOUSTIC PULSES INTO THE MEDIUM COINCIDENT WITH FIRST AND SECOND TIMING PULSES FROM THE SAID SERIES OF TIMING PULSES; RECEIVING FIRST AND SECOND ACOUSTIC PULSES FROM WHICH THE SAID MEDIUM RESULTING FROM REFLECTIONS OF THE SAID TRANSMITTED ACOUSTIC PULSES; INITIATING THE SWEEP WAVEFORM OF A CATHODE RAY TUBE COINCIDENT WITH THE FIRST TIMING PULSE TO OCCUR AFTER THE RECEPTION OF THE FIRST ACOUSTIC PULSE OF THE SAID RECEIVED FIRST AND SECOND ACOUSTIC PULSES; INTENSITY MODULATING THE ELECTRON BEAM CURRENT OF THE SAID CATHODE RAY TUBE COINCIDENT WITH THE RECEPTION OF THE SECOND ACOUSTIC PULSE OF THE SAID RECEIVED FIRST AND SECOND ACOUSTIC PULSES; TERMINATING THE AFOREMENTIONED SWEEP WAVEFORM COINCIDENT WITH A TIMINING PULSE FROM THE SAID SERIES OF TIMING PULSES; TRANSLATING ELECTRON BEAM INTENSITY VARIATIONS IMPINGING ON THE INNER SURFACE TO CORRESPONDING LIGHT VARIATIONS ON THE OUTER SURFACE OF THE SAID CATHODE RAY TUBE FACEPLATE BY MEANS OF A LUMINESCENT PHOSPHOR AND FIBER OPTIC MATRIX COMBINATION WITHIN THE SAID FACEPLATE; AND CONTINUALLY PASSING A STRIP OF PHOTOSENSITIVE PAPER ACROSS THE SURFACE OF THE SAID FACEPLATE SO THAT A GRAPHIC RECORD IS OBTAINED OF THE DISTANCE TO REFLECTING OBJECTS IN THE MEDIUM.