Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes linking support cable in drive-means
Patent
1997-04-02
1999-01-19
Noland, Kenneth
Elevator, industrial lift truck, or stationary lift for vehicle
Having specific load support drive-means or its control
Includes linking support cable in drive-means
187414, B66B 1108
Patent
active
058610847
ABSTRACT:
Tension of compensating ropes in an elevator system is electively changed to minimize horizontal vibration of the compensating ropes in tall buildings. The tension of compensating ropes is changed by a tensioning mechanism either when the horizontal movement of the compensating ropes exceeds a preset limit or when the building sway exceeds a predetermined amount. Additionally, the tension of compensating ropes can be changed when the elevator car is parked within certain predetermined top floors. The tension can be applied to a compensating sheave supporting the compensating ropes by a tensioning mechanism such as a hydraulic jack.
REFERENCES:
patent: 2215021 (1940-09-01), Vallen
patent: 4522285 (1985-06-01), Salmon et al.
Barker Frederick H.
Erlandsen Peter O.
Noland Kenneth
Otis Elevator Company
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