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US 6,202,797 B1Granted
Automatic protection of elevator mechanics
AssigneeOtis Elevator Company
InventorsSteven M. Skolnick, Chester J. Slabinski, Frank M. Sansevero
Life of this patent
Estimating the term…
Abstract
A portable device worn by an elevator mechanic when in the pit of the hoistway or on top of a car will activate sensors disposed on the car so as to cause an emergency stop and warn the mechanic of the elevator's presence. The portable device may be disposed with some form of alarm beneath an emblem, or otherwise, on the uniform of a mechanic.
Claims4
An elevator car safety system for use with an elevator car that is moveable vertically within the hoistway of a building, comprising:
- one or more sensors disposed on the top of said elevator car and one or more sensors disposed at the bottom of said elevator car;
- at least one portable device, each portable device to be w by a person entering said hoistway, each portable device, when worn by a person disposed in said pit or on top of said car capable of inducing a response in one of said sensors;
- and
- means responsive to a response induced in one of said sensors to cause an emergency stop of said elevator.
1 more element
A system according to claim herein each said portable device is disposed on an elevator mechanic uniform.
Dependencies are inferred from the claim text.