Sequential seismic correction means

Claim 1

THE COMBINATION COMPRISING MEANS FOR GENERATING AT LEAST TWO SIGNALS SEQUENTIALLY AND RESPECTIVELY REPRESENTATIVE OF SEISMIC WAVES APPEARING AT A FIRST DETECTING STATION AND AT A SECOND DETECTING STATION SPACED A DIFFERENT DISTANCE FROM THE SOURCE OF SAID SEISMIC WAVES THAN SAID FIRST STATION, TWO CONSTANT VOLTAGE SOURCES BEARING A RATIO ONE TO THE OTHER IN PROPORTION TO THE RATIO OF THE SQUARES OF THE DISTANCES BETWEEN THE DETECTING STATIONS AND SAID SOURCE OF SEISMIC WAVES, ADJUSTING MEANS CONNECTED TO A FIRST OF SAID VOLTAGE SOURCES FOR ADJUSTING THE RELATIVE TIME OCCURRENCE OF COMPONENTS OF SIGNALS DETECTED AT SAID FIRST STATION IN DEPENDENCE UPON THE PRODUCT OF THE CONSTANT VOLTAGE FROM THE FIRST OF SAID SOURCES AND A PRESELECTED GEOMETRICAL CORRECTION FUNCTION FOR PATHS OF SEISMIC WAVES TRAVELING FROM SAID SOURCE OF SEISMIC WAVES TO SAID FIRST DETECTING STATION, MEANS OPERATIVE INTERMEDIATE SEQUENTIAL GENERATION OF SAID TWO SIGNALS FOR CONNECTING SAID ADJUSTING MEANS TO A SECOND OF SAID VOLTAGE SOURCES TO ADJUST THE RELATIVE TIME OCCURRENCE OF COMPONENTS OF SIGNALS