Solid-state, clock pulse synchronized, logical control system for elevators

Claim 1

A COMPLETELY SOLID-STATE, RELAY-FREE ELECTRONIC CONTROL SYSTEM FOR AN ELEVATOR PLANT INCLUDING A PLURALITY OF ELEVATORS, EACH OF SAID ELEVATORS SERVING A PLURALITY OF FLOORS COMPRISING: A SINGLE MEANS FOR GENERATING TIMEDEPENDENT SIGNALS COMMON TO ALL OF SAID ELEVATORS COMPRISING TIME-DEPENDENT STEP-BY-STEP SWITCHING MEANS HAVING SWITCHING POSITIONS THE NUMBER OF WHICH CORRESPONDS WITH THE NUMBER OF FLOORS BEING SERVED, AND MEANS FOR CONTINUOUSLY SWITCHING SAID TIME-DEPENDENT SWITCHING MEANS BETWEEN SUCCESSIVE SWITCHING POSITIONS IN ONE SENSE AND, UPON COMPLETION OF THE SWITCHING IN SAID ONE SENSE, BETWEEN SUCCESSIVE SWITCHING POSITIONS IN THE OPPOSITE SENSE; A PLURALITY OF MEANS FOR GENERATING ELEVATOR POSITIONDEPENDENT SIGNALS EACH ASSOCIATED, RESPECTIVELY, WITH EACH OF SAID ELEVATORS COMPRISING POSITION-DEPENDENT STEP-BYSTEP SWITCHING MEANS HAVING THE SAME NUMBER OF SWITCHING POSITIONS AS SAID TIME-DEPENDENT SWITCHING MEANS, AND MEANS RESPONSIVE TO MOVEMENT OF AN ELEVATOR RELATIVE TO EACH OF SAID FLOORS FOR SWITCHING SAID POSITION-DEPENDENT SWITCHING MEANS BETWEEN POSITIONS IN A DIRECTION IN ACCORDANCE WITH THE MOVEMENT OF SAID ELEVATOR RELATIVE TO THE RESPECTIVE FLOORS; AND A PLURALITY OF MEANS OPERABLE BY SAID TIME-DEPENDENT SIGNALS AND SAID POSITION-DEPENDENT SIGNALS FOR CONTROLLING TRAVEL OF AN ELEVATOR BETWEEN SAID FLOORS EACH ASSOCIATED, RESPECTIVELY, WITH EACH OF SAID ELEVATORS AND COMPRISING COINCIDENCE MEANS RESPONSIVE TO SAID TIME-DEPENDENT AND SAID POSITION-DEPENDENT SIGNALS FOR PRODUCING COINCIDENCE BAND SIGNALS FOR INDICATING THE PERIODS DURING WHICH THE TIME-DEPENDENT AND POSITION-DEPENDENT SWITCHING MEANS HAVE CORRESPONDING INSTANTANEOUS SWITCHING POSITIONS.