Elevator control system

Claim 1

LOAD CONVEYING APPARATUS COMPRISING A FIRST STRUCTURE HAVING A PLURALITY OF SPACED LANDINGS, A LOAD TRANSPORTING STRUCTURE FOR SERVING SAID LANDINGS, MEANS MOUNTING THE LOAD TRANSPORTING STRUCTURE FOR MOVEMENT RELATIVE TO THE FIRST STRUCTURE IN A PREDETERMINED PATH TO SERVE SAID LANDINGS, MOTIVE MEANS OPERABLE WHEN ENERGIZED FOR MOVING THE LOAD TRANSPORTING STRUCTURE, AND CONTROL MEANS OPERABLE IN COOPERATION WITH SAID MOTIVE MEANS FOR MOVING THE LOAD TRANSPORTING STRUCTURE, SAID CONTROL MEANS INCLUDING STOPPING MEANS FOR STOPPING THE LOAD TRANSPORTING STRUCTURE ADJACENT EACH OF DESIRED ONES OF SAID LANDINGS, A BRAKE FOR SAID MOTIVE MEANS, FIRST CONTROL MEANS FOR CONTROLLING ENERGIZATION OF SAID MOTIVE MEANS TO MOVE THE LOAD TRANSPORTING STRUCTURE SUBSTANTIALLY FROM A FIRST OF SAID LANDINGS TO A SECOND OF SAID LANDINGS, SECOND CONTROL MEANS FOR CONTROLLING ENERGIZATION OF SAID MOTIVE MEANS TO STOP THE LOAD TRANSPORTING STRUCTURE AT SAID SECOND LANDING, A RADIANT ENERGY SENSITIVE DEVICE, MEANS AUTOMATICALLY RENDERING SAID DEVICE OPERATIVE TO EFFECT TRANSFER OF ENERGIZATION OF SAID MOTIVE MEANS FROM CONTROL BY SAID FIRST CONTROL MEANS TO CONTROL BY SAID SECOND CONTROL MEANS WHEN THE LOAD TRANSPORTING STRUCTURE IS IN A FIRST PREDETERMINED POSITION DISPLACED FROM SAID SECOND LANDING AS THE LOAD TRANSPORTING STRUCTURE APPROACHES THE SECOND LANDING, MEANS RESPONSIVE TO THE ARRIVAL OF THE LOAD TRANSPORTING STRUCTURE AT A PREDETERMINED POSITION OF REGISTRATION WITH SAID SECOND LANDING FOR AUTOMATICALLY RENDERING SAID DEVICE OPERATIVE TO EFFECT TERMINATION OF THE CONTROL OF ENERGIZATION OF SAID MOTIVE MEANS BY SAID SECOND CONTROL MEANS TO DEENERGIZE SAID MOTIVE MEANS AND TO APPLY SAID BRAKE TO SAID MOTIVE MEANS FOR TERMINATING MOVEMENT OF THE LOAD TRANSPORTING STRUCTURE AT SAID POSITION OF REGISTRATION, MEANS RESPONSIVE TO A MALFUNCTION OF SAID DEVICE AS THE LOAD TRANSPORTING STRUCTURE APPROACHES THE SECOND LANDING FOR RENDERING SAID FIRST AND SECOND CONTROL MEANS INEFFECTIVE FURTHER TO CONTROL ENERGIZATION OF SAID MOTIVE MEANS TO DEENERGIZE SAID MOTIVE MEANS AND FOR APPLYING SAID BRAKE TO SAID MOTIVE MEANS TO TERMINATE MOVEMENT OF THE LOAD TRANSPORTING STRUCTURE, AND MEANS RESPONSIVE TO A MALFUNCTION OF SAID DEVICE WHEN THE LOAD TRANSPORTING STRUCTURE IS IN SAID POSITION OF REGISTRATION WITH SAID SECOND LANDING FOR RENDERING SAID SECOND CONTROL MEANS INEFFECTIVE FURTHER TO CONTROL ENERGIZATION OF SAID MOTIVE MEANS.