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US 5,476,157 AGranted
Elevator control system with elevator hoistway operation monitoring system and method
OwnerSam S. Todaroinventor
Life of this patent
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OwnerSam S. Todaroinventor
Estimating the term…
An elevator control system (40) for automatically controlling the operation of an elevator car (22A) having a car door (24A) in which the elevator moves between different floor levels of an elevator shaft (30A) in which each floor level has associated hoistway doors (26A, 26C) for providing access to the elevator car (22A) in the shaft (30A) and an elevator hoistway operation monitoring system (34) with individual floor monitoring switches (32) for determining the floor level location of the elevator car (22A), individual hoistway door monitoring sensors (38) for sensing the opening of a hoistway door (26A) relays (56, 58, 52) and contact (50) coupled with an elevator safety circuit (42) for automatically preventing the elevator car (22A) from moving if a hoistway door (26A) is opened at a floor level other than the floor level at which the elevator car (22A) is located and for prohibiting the car (22A) from moving in response to the closing of the opened hoistway door (26A).
In an elevator control system for automatically controlling the operation of an elevator car having a car door in which said elevator car moves between different ones of a plurality of floor levels through an elevator shaft and in which said floor levels each have a hoistway door providing access to the elevator car in the shaft the improvement being an elevator hoistway operation monitoring system comprising:
In an elevator control system for automatically controlling the operation of an elevator car having a car door in which said elevator car moves between different ones of a plurality of floor levels in which an associated hoistway door is located on each of said plurality of floor levels to provide access to the elevator car at each floor and in which at least one other elevator car is located in an elevator bank with said elevator and in which the at least one other elevator car is spaced laterally from the elevator car in the elevator bank and in which said at least one other elevator car in the bank moves between different ones of another plurality of floor levels in which an associated another elevator hoistway door is located on each of said other plurality of floor levels to provide access to the at least one other elevator car, the improvement being an elevator hoistway operation monitoring system comprising:
Dependencies are inferred from the claim text.