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Claim 1

A READING CONTROL CIRCUIT FOR A RECORD MEMBER COMPRISING A RECORD MEMBER HAVING GROUPS OF INFORMATION MARKS INCLUDING A TIMING MARK FOR EACH GROUP OF INFORMATION MARKS, PHOTOVOLTAIC SENSING MEANS COMPRISING A PLURALITY OF SEPARATE SENSING ELEMENTS ARRANGED AND SPACED IN ACCORDANCE WITH THE ARRANGEMENT OF INFORMATION AND TIMING MARKS, EACH OF SAID SENSING ELEMENTS PROVIDING AN ELECTRICAL SIGNAL IN RESPONSE TO LIGHT IMPINGING THEREON, CIRCUIT MEANS CONNECTED TO THE SENSING MEANS FOR SEPARATELY RECEIVING THE ELECTRICAL SIGNALS CORRESPONDING EACH SENSED INFORMATION MARK AND NORMALLY ARRANGED A NON-CONDUCTIVE MODE WHEREBY SAID ELECTRICAL SIGNAL OF AN AMPLITUDE GREATER THAN A PREDETERMINED THRESHOLD LEVEL CORRESPONDING TO A SENSED INFORMATION MARK FROM SAID SENSING MEANS IN COMBINATION WITH A CONDITIONING SIGNAL IS NECESSARY TO RENDER SAME CONDUCTIVE, AND SWITCHING CIRCUIT MEANS CONNECTED TO THE SENSING MEANS FOR RECEIVING ONLY THE ELECTRICAL SIGNAL CORRESPONDING TO A SENSED TIMING MARK AND SWITCHABLE IN RESPONSE THERETO, SAID SWITCHING CIRCUIT MEANS BEING FURTHER CONNETED TO SAID CIRCUIT MEANS TO CONDITION THE CONDUCTIVITY THEREOF WHEREBY SAID CONDITIONED CIRCUIT MEANS WILL PROVIDE SIMULTANEOUS OUTPUT SIGNALS CORRESPONDING ONLY TO EACH SENSED INFORMATION MARK UPON RECEIVING SAID ELECTRICAL SIGNAL REPRESENTATIVE OF THE SENSED INFORMATION MARK.