Detector system for plural unit printing press

Claim 1

IN ARTICLE PROCESSING APPARATUS HAVING MEANS FOR MOVING PRECISELY POSITIONED, SPACED APART ARTICLES THROUGH A PLURALITY OF STATIONS IN SUCCESSION FOR TREATMENT; MEANS FOR DETECTING DISPLACED ARTICLES AND FOR PROVIDING OUTPUT SIGNALS IN RESPONSE THERETO FOR CONTROL OF SAID APPARATUS COMPRISING: A PLURALITY OF DETECTOR MEANS OPERATING IN SYNCHRONISM WITH SAID MOVING MEANS AND BEING EFFECTIVE TO DETECT UNWANTED DISPLACEMENTS OF THE ARTICLES AT POINTS AHEAD OF SAID STATIONS AND TO PREPARE FOR TRANSMISSION OF DETECTION SIGNALS; A PLURALITY OF CIRCUIT MEANS FOR THE RESPECTIVE DETECTOR MEANS RESPONSIVE TO INPUT DETECTION SIGNALS WHEN CONDITIONED THEREFOR FOR PROVIDING OUTPUT CONTROL SIGNALS TO INITIATE CONTROL OF SAID APPARATUS; MEANS OPERATING IN SYNCHRONISM WITH SAID MOVING MEANS FOR PROVIDING REPETITIVE TIMING SIGNALS INCLUDING TRIP SIGNALS AND RESTORATION SIGNALS FOR SAID CIRCUIT MEANS, SOME OF SAID TIMING SIGNALS BEING USABLE AS TRIP SIGNALS OR RESTORATION SIGNALS FOR MORE THAN ONE CIRCUIT MEANS DEPENDING UPON THE DISTANCE BETWEEN SAID DETECTION POINTS; MEANS RESPONSIVE TO EACH SAID TRIP SIGNAL FOR CONDITIONING FOR A TIMED INTERVAL THE ASSOCIATED CIRCUIT MEANS SO THAT IT CAN RESPOND TO A DETECTION SIGNAL IF APPLIED THERETO; MEANS OPERATING IN SYNCHRONISM WITH SAID MOVING MEANS FOR MOMENTARILY COUPLING EACH DETECTOR MEANS TO ITS ASSOCIATED CIRCUIT MEANS DURING SAID TIMED INTERVAL TO TRANSMIT A DETECTION SIGNAL WHEREBY TO AFFORD OPERATION OF SAID CIRCUIT MEANS ONLY WHEN SAID DISPLACEMENT IS INITIALLY DETECTED THEREBY TO PREVENT OPERATION OF SAID CIRCUIT MEANS BY EXTRANEOUS SIGNALS; AND MEANS RESPONSIVE TO SAID RESTORATION SIGNALS FOR RESTORING EACH OPERATED CIRCUIT MEANS TO ITS FORMER CONDITION A PREDETERMINED TIME AFTER IT HAS BEEN OPERATED THEREBY TO TERMINATE ITS OUTPUT CONTROL SIGNAL AND TO PREPARE IT FOR REOPERATION.