Apparatus for variable density recording

Claim 1

THE SYSTEM FOR RECORDING SEISMIC RESPONSE DATA AS A VARIABLE DENSITY WAVE-FRONT PATTERN WHICH COMPRISES: MEANS FOR SCANNING A BEAM OF ENERGY OVER A RECORD SHEET SENSITIVE TO THE ENERGY IN A SERIES OF ARCS THE RADII OF WHICH INCRESE IN A MANNER DETERMINED BY VELOCITY DATA AND THE APPARENT CENTERS OF WHICH ARE LOWERED IN ACCORDANCE WITH ACCELERATION DATA, MEANS FOR MODULATING THE BEAM OF ENERY TO PRODUCE A SERIES OF PULSES OF SUBSTANTIALLY UNIFORM SIZE HAVING A REPETITION RATE REPRESENTATIVE OF THE PRODUCT OF THE INSTANTANEOUS VALUE OF THE SEISMIC RESPONSE DATA AND THE VELOCITY OF THE BEAM OF ENERGY OVER THE RECORD SHEET TO PRODUCE A WAVE FRONT PATTERN, AND MEANS FOR INDEXING THE RECORD SHEET PAST THE MEANS FOR SCANNING THE BEAM OF ENERGY AT INTERVALS LESS THAN THE SCANNING WIDTH OF THE BEAM AFTER EACH SCANNING CYCLE PRODUCES A WAVE FRONT PATTERN WHEREBY SUCCESSIVE WAVE FRONT PATTERNS WILL OVERLAP AND BE PARTIALLY SUPERIMPOSED ONE UPON THE OTHER.

Claim 2

THE SYSTEM FOR RECORDING SEISMIC RESPONSE DATA AS A VARIABLE DENSITY WAVE-FRONT PATTERN WHICH COMPRISES: MEANS FOR SCANNING A BEAM OF ENERGY OVER A RECORD SHEET SENSITIVE TO THE ENERGY IN A SERIES OF ARCS THE RADII OF WHICH INCRESE IN A MANNER DETERMINED BY VELOCITY DATA AND THE APPARENT CENTERS OF WHICH ARE LOWERED IN ACCORDANCE WITH ACCELERATION DATA, MEANS FOR MODULATING THE BEAM OF ENERY TO PRODUCE A SERIES OF PULSES OF SUBSTANTIALLY UNIFORM SIZE HAVING A REPETITION RATE REPRESENTATIVE OF THE PRODUCT OF THE INSTANTANEOUS VALUE OF THE SEISMIC RESPONSE DATA AND THE VELOCITY OF THE BEAM OF ENERGY OVER THE RECORD SHEET TO PRODUCE A WAVE FRONT PATTERN, AND MEANS FOR INDEXING THE RECORD SHEET PAST THE MEANS FOR SCANNING THE BEAM OF ENERGY AT INTERVALS LESS THAN THE SCANNING WIDTH OF THE BEAM AFTER EACH SCANNING CYCLE PRODUCES A WAVE FRONT PATTERN WHEREBY SUCCESSIVE WAVE FRONT PATTERNS WILL OVERLAP AND BE PARTIALLY SUPERIMPOSED ONE UPON THE OTHER.