Constant density oscillograph trace

Claim 1

IN A RECORDING OSCILLOGRAPH INCLUDING MEANS FOR MOVING A LIGHT SENSITIVE RECORDING MEDIUM ALONG A PREDETERMINED PATH, A CONSTANT INTENSITY SOURCE OF LIGHT RADIATION, MEANS FOR DIRECTING A BEAM OF THE LIGHT RADIATION ALONG A SELECTED PATH INTERSECTING SAID PREDETERMINED PATH TO RECORD UPON A MEDIUM MOVING THEREALONG AN IMAGE OF THE BEAM, AND MEANS RESPONSIVE TO VARIATIONS IN AN INPUT SIGNAL TO THE OSCILLOGRAPH FOR DEFLECTING THE BEAM TRANSVERSELY OF SAID PREDETERMINED PATH SO THAT THE RECORDED IMAGE FORMS A RECORD OF VARIATIONS IN THE VALUE OF THE INPUT SIGNAL, THE IMPROVEMENT COMPRISING LIGHT MODULATING MEANS RESPONSIVE TO VARIATIONS IN THE INPUT SIGNAL FOR VARYING THE AMOUNT OF LIGHT TRANSMITTED ALONG SAID SELECTED PATH FROM THE LIGHT SOURCE TO THE RECORDING MEDIUM IN PROPORTION TO THE RATE AT WHICH THE BEAM MOVES TRANSVERSELY OF SAID PREDETERMINED PATH, THE LIGHT MODULATING MEANS INCLUDING A LIGHT POLARIZER DISPOSED ACROSS THE BEAM, A POLARIZED LIGHT ANALYZER DISPOSED ACROSS THE BEAM OPPOSITE THE POLARIZER FROM THE LIGHT SOURCE, A KERR CELL DISPOSED ACROSS THE BEAM BETWEEN THE POLARIZER AND THE ANALYZER, A FILTER CIRCUIT TO WHICH THE INPUT SIGNAL IS APPLIED AND CONSTRUCTED SO THAT, WHEN THE INPUT SIGNAL VARIES IN A MANNER PRODUCTIVE OF A VELOCITY OF THE BEAM TRANSVERSELY OF THE DIRECTION OF MEDIUM MOVEMENT GREATER THAN A SELECTED VELOCITY, THE FILTER CIRCUIT PASSES AS ITS OUTPUT THE INPUT SIGNAL TO AN EXTENT PROPORTIONAL TO THE DIFFERENCE BETWEEN THE INSTANTANEOUS TRANSVERSE VELOCITY OF THE BEAM AND THE SELECTED VELOCITY, AND MEANS APPLYING THE OUTPUT OF THE FILTER CIRCUIT TO THE KERR CELL FOR DRIVING THE KERR CELL.