Elevator hoistway access safety
AssigneeOtis Elevator Company
InventorFrank M. Sansevero
Life of this patent
Estimating the term…
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AssigneeOtis Elevator Company
InventorFrank M. Sansevero
Estimating the term…
The condition of the hoistway doors and the elevator door are continuously monitored. The opening of a hoistway door unaccompanied by opening of the car door being an indication of hoistway access; the car then is moveable only at inspection (slow) speed by utilizing controls on the car top; restoration to normal is achieved only by returning the inspection switch on the car top to normal operation while a hoistway door is open, and subsequently closing the hoistway doors and/or by activating a reset located outside the hoistway. Inspection speed limit switches are installed near the top and bottom of the hoistway positioned so that if operated while the elevator is traveling at inspection speed, the car will stop at a position which leaves a person ample room from the hoistway overhead or the pit floor. If a person enters the pit, normal operation is restored only by closing the hoistway door and subsequently engaging an external reset switch (outside the hoistway).
A method of providing hoistway access safety in an elevator system having a car with a door and having a hoistway with a plurality of hoistway doors, comprising:
An elevator system in a building comprising:
A method of providing hoistway access safety in an elevator system having a car with a door and having a hoistway with a plurality of hoistway doors, comprising:
Dependencies are inferred from the claim text.