Apparatus for reproducing seismic records

Claim 1

IN COMBINATION, SIGNAL REPRODUCING MEANS OF A TYPE PROVIDING SIMULTANEOUSLY A PLURALITY OF LUMINOUS OUTPUT SIGNALS TRAVERSING IN OVERLAPPING RELATION A PREDETERMINED PATH IN ACCORDANCE WITH AN IN RESPONSE TO INDEPENDENT INPUT SIGNALS THERETO SO THAT THE POSITIONS OF SAID OUTPUT SIGNALS ALONG SAID PATH ARE REPRESENTATIVE TO SAID INPUT SIGNALS, AND ARRAY OF PHOTOSENSITIVE DEVICES DISPOSED ALONG SAID PATH TO PROVIDE ELECTRICAL OUTPUT SIGNALS SELECTIVELY IN ACCORDANCE WITH THE POSITION OF SAID LUMINOUS OUTPUT SIGNALS ALONG SAID PATH, MEANS FOR ADVANCING A RECORD MEMBER OF A TYPE ADAPTED TO BE MARKED BY CURRENTS INTRODUCED THERETO, AN ARRAY OF STYLI DISPOSED ADJACENT TO SAID RECORD MEMBER AND TRANSVERSELY OF THE DIRECTION OF ADVANCE OF SAID RECORD MEMBER, SAID ARRAY OF STYLI BEING ARRANGED IN THE SAME RELATIVE RELATIONSHIP TRANSVERSELY OF SAID RECORD MEMBER AS SAID ARRAY OF PHOTOSENSITIVE DEVICES ARE ARRANGED ALONG SAID PREDETERMINED PATH, MEANS INDIVIDUALLY CONNECTING SAID PHOTOSENSITIVE DEVICES TO SAID STYLI IN CORRESPONDENCE WITH SAID RELATIVE RELATIONSHIP THEREBETWEEN TO PROVIDE CURRENTS FROM SAID STYLI TO MARK SAID RECORD MEMBER IN RESPONSE TO SAID ELECTRICAL OUTPUT SIGNALS FOR PRODUCING, SIMULTANEOUSLY, TRACES ON SAID RECORD MEMBER CORRESPONDING TO SAID LUMINOUS OUTPUT SIGNALS AND HAVING OVERLAPPING RANGES CORRESPONDING TO THE OVERLAPPING RELATION OF SAID LUMINUOUS OUTPUT SIGNALS, AND MEANS FOR PRODUCING TIME MARKINGS ON SAID RECORD MEMBER AT SPACED INTERVALS INCLUDING MEANS FOR INTERMITTENTLY ILLUMINATING A PLURALITY OF SAID PHOTOSENSITIVE DEVICES SIMULTANEOUSLY.