Elevator control system employing logical elements

Claim 1

AN ELEVATOR CONTROL FOR AN ELEVATOR SYSTEM FORMED OF AN ELEVATOR CAR, A SHAFT AND A HOISTING MOTOR FOR MOVING SAID CAR IN SAID SHAFT, A STOP DEVICE FOR STOPPING SAID CAR WHEN ASCENDING AND A STOP DEVICE FOR STOPPING SID CAR WHEN DESCENDING, SAID ELEVATOR CONTROL COMPRISING: (A) AT LEAST ONE FIRST SERIES OF LOCATING ELEMENTS (12, 12,14,15) IN SAID SYSTEM FOR INDICATING THE LOCATIONS WHERE SAID STOP DEVICE FOR AN ASCENDING CAR MUST BE CONTROLLED; (B) A FIRST PASAGE DETECTOR (10) IN SAID SYSTEM DISPLACEABLE AT THE SPEED OF THE CAR IN RELATION TO THE LOCATING ELEMENTS OF SAID FIRST SERIES; SAID FIRST PASSAGE DETECTOR COOPERATING WITH THE LOCATING ELEMENTS OF SAID FIRST SERIES; (C) AT LEAST ONE SECOND SERIES OF LOCATING ELEMENTS (21, 22,23,24) IN SAID SYSTEM FOR INDICATING THE LOCATIONS WHERE SAID STOP DEVICE FOR A DESCENDING CAR MUST BE CONTROLLED; (D) A SECOND PASSAGE DETECTOR (20) IN SAID SYSTEM DISPLACEABLE AT THE SPEED OF THE CAR IN RELATION TO THE LOCATING ELEMENTS OF SAID SECOND SERIES; SAID SECOND PASSAGE DETECTOR COOPERATING WITHTHE LOCATING ELEMENTS OF SAID SECOND SERIES; (E) A DEVICE FOR EMITTING AUXILIARY CONTROL SIGNALS: FOR EACH FLOOR, EXCEPT THE BOTTOM FLOOR, AT LEAST ONE SIGNAL (B) INDICATING IF THE CAR IS BELOW THE LOCATION WHERE SAID STOP DEVICE FOR AN ASCENDING CAR IS ACTUATED; FOR EACH FLOOR, EXCEPT THE TOP FLOOR, AT LEAST ONE SIGNAL (H) INDICATING IF THE CAR IS ABOVE THE LOCATION WHERE SAID STOP DEVICE A DESCENDING CAR IS TO BE ACTUATED, AND AT LEAST ONE SIGNAL (N) INDICATING IF THE CAR IS BETWEEN TH ABOVE TWO LOCATIONS; (F) SAID AUXILIARY CONTROL SIGNAL EMITTING DEVICE FORMED BY LOGICAL CIRCUITS SENSITIVE TO THE SIGNALS EMITTED BY THE PASSAGE DETECTORS IM AND ID AND TO A SIGNAL (S) INDICATING THE DIRECTION OF ROTATION OF SAID HOISTING MOTOR; (G) A CALL MEMORY DEVICE, IN SAID ASSEMBLY, TO WHICH SAID AUXILIARY CONTROL SIGNALS AND CALL CONTROL SIGNALS (K1K2K3K4K5) ARE APPLIED; SAID CALL MEMORY DEVICE EMITTING A HOISTING SIGNAL (S), A LOWERING SIGNAL (S'') AND A STOP SIGNAL FOR SAID HOISTING MOTOR.