摘要:
An elevator control arrangement for detecting the physical displacement of one of the system''s movable components from its normal operating position and thereafter restraining further movement of the car to a direction in which such movement increases the physical separation of the car from its counterweight.
摘要:
An elevator car in which the junction box and wiring raceways for the electrical conductors are integral with horizontal and vertical structural members.
摘要:
A ZONED ELEVATOR CONTROL SYSTEM FOR A GROUP OF CARS IN WHICH THE CARS ARE DISTRIBUTED ON A PREDETERMINED APPORTIONED BASIS INTO VARIOUS ZONES OF THE BUILDING, WHEREUPON IN THE ABSENCE OF CALLS EACH CAR IS BROUGHT TO A STOP AT A LANDING IN THE ZONE IT IS OCCUPYING. THEREAFTER IN A ZONE OCCUPOED BY A CAR THE RESPONSE TO THE FIRST LANDING CALL IS LIMITED TO A CAR LOCATED IN THAT ZONE. A LANDING CALL IN A ZONE IN WHICH NO CAR IS LOCATED STARTS A CAR LOCATED IN THE NEAREST LOWER ZONE. THE LEVEL OF TRAFFIC IN EACH ZONE IS MEASURED INDIVIDUALLY. AN UP OR A DOWN LANDING CALL IN REGISTRATION IN ANY ZONE CONTINUOUSLY FOR A PREDETERMINED PERIOD WITHOUT AND UP OR A DOWN LANDING CALL RESPECTIVELY BEING CANCELLED INDICATES THE ZONE IS A HEAVY DEMAND ZONE. AS A RESULT THE LIMITATION ON THE RESPONSE TO LANDING CALLS TO A CAR LOCATED IN THAT ZONE IS REMOVED. THIS ENABLES A CAR IN THE NEAREST LOWER ZONE TO RESPOND TO LANDING CALLS IN THE HEAVY TRAFFIC DEMAND ZONE NOTWITHSTANDING ANOTHER CAR IS OCCUPYING THAT ZONE. IN ADDITION WHILE THE HEAVY TRAFFIC DEMAND CONTINUES ANY CAR IN A ZONE WHICH IS IN EXCESS OF THE APPORTIONED NUMBER OF CARS FOR THAT ZONE IS PREVENTED FROM TRAVELING TO AN UNOCCUPIED ZONE AS IT OTHERWISE WOULD AND IS CAUSED TO TRAVEL TO THE HEAVY TRAFFIC DEMAND ZONE. THE HEAVY TRAFFIC DEMAND INDICATION IS TERMINATED BY THE CANCELLATION OF A LANDING CALL FOR THE SAME DIRECTION AS THE LANDING CALL WHOSE CONTINUOUS REGISTRATION INSTITUTED THE DEMAND.
摘要:
A zoned elevator control system for a group of cars in which the cars are distributed on a predetermined apportioned basis into various zones of the building for assignment thereto, whereupon in the absence of calls each car is brought to a stop at a landing in a zone to which it is assigned. Thereafter in a zone to which a car is assigned the response to the first landing call is limited to a car assigned to that zone. A landing call in a zone to which no car is assigned starts a car assigned in the nearest lower zone. The level of traffic in each zone is measured individually and is a function of the number of landing calls in registration in the respective zone. An average of a number of landing calls in all zones is derived and a comparison is made between the number of landing calls in each individual zone and the average number of landings calls. Whenever the number in any zone exceeds the average by a predetermined amount it signifies that the zone is a heavy traffic zone. As a result the limitation on the response to landing calls to a car assigned to that zone is removed. This enables a car in the nearest lower zone to respond to landing calls in the heavy traffic zone notwithstanding another car is assigned to that zone. In addition while the heavy traffic demand continues any car in a zone which is in excess of the apportioned number of cars for that zone and therefore is not assigned to that zone is caused to travel toward the heavy traffic zone. All cars entering the heavy traffic zone while the heavy traffic demand continues are assigned to that zone and are thereby prevented from traveling to an unoccupied zone as they otherwise would.