Elevator systems
AssigneeOtis Elevator Company
InventorsRalph S. Stripling, Sven Knuth
Life of this patent
Estimating the term…
Abstract
An elevator system 2 is provided which comprises: a hoistway 6 accessible by at least one hoistway door 10a, 10b, 10c; at least one elevator car 4 located in the hoistway 6; a hoistway door switch 12a, 12b, 12c associated with the at least one hoistway door 10a, 10b, 10c; at least one inspection switch 16; at least one emergency stop switch 18; and an elevator controller 24. The elevator controller 24 is configured to monitor the hoistway door switch 12a, 12b, 12c, the inspection switch 16 and the emergency stop switch 18 and to prevent inspection mode operation of the elevator car 4 until at least one change of state is detected of each of the hoistway door switch 12a, 12b, 12c, the inspection switch 16 and the emergency stop switch 18.
Claims12
An elevator system comprising:
- a hoistway accessible by at least one hoistway door;
- at least one elevator car located in the hoistway;
- a hoistway door switch associated with the at least one hoistway door;
- at least one inspection switch;
- at least one emergency stop switch;
- and
- an elevator controller;
- wherein the elevator controller is configured:
- to monitor the hoistway door switch, the inspection switch and the emergency stop switch;
- and
- to prevent inspection mode operation of the elevator car until at least one change of state is detected of each of the hoistway door switch, the inspection switch and the emergency stop switch.
A method of operating an elevator system comprising at least one elevator car located in a hoistway, said hoistway being accessible by at least one hoistway door, the method comprising:
- monitoring a hoistway door switch associated with the at least one hoistway door, an inspection switch and an emergency stop switch;
- and
- preventing inspection mode operation of the elevator car until at least one change of state is detected of each of the hoistway door switch, the inspection switch and the emergency stop switch.
Dependencies are inferred from the claim text.