Elevator system control responsive to hoistway access detection
AssigneeOtis Elevator Company
InventorsHelio Tinone, Anthony Black, Nora E. LaFreniere
Life of this patent
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Abstract
An elevator system (20) includes a sensor (30, 36) for detecting the presence of an individual within a hoistway (24). A controller (32) prevents movement of an elevator car (22) whenever an individual is in the hoistway (24). A pit override device (34) provides an override signal to the controller (32) permitting movement of the elevator car (22) if someone is in a pit (26). A car top override device (38) selectively provides an override signal to the controller (32) permitting movement of the car. A disclosed example includes controlling at least one light (40) within the hoistway (24) in conjunction with movement or attempted movement of the elevator car (22).
Claims18
An elevator safety system, comprising:
- a sensor for detecting the presence of an individual in a hoistway;
- an override device that provides an override signal responsive to manual activation by the individual in the hoistway;
- and
- a controller that communicates with the sensor and the override device, the controller prevents movement of an associated elevator car if the sensor indicates the presence of all individual and the override device does not provide the override signal.
A method of controlling movement of an elevator car within a hoistway, comprising the steps of:
- determining whether there is an individual in the hoistway;
- and
- preventing movement of the elevator car if an individual is in the hoistway unless the individual manually activates an override device while the individual is in the hoistway to provide an override signal for permitting movement of the elevator car.
Dependencies are inferred from the claim text.