Calibration of crane load indicating arrangement

Details Calibration of crane load indicating arrangement Calibration of crane load indicating arrangement

1975-11-05

1977-12-20

Spar, Robert J.

Traversing hoists

Overhead

Cable

340177CA, 340267C, B66C 1316, B66C 2390

Patent

active

040636496

ABSTRACT:
A device for the calibration of the safe load indicating apparatus on cranes and derricks that have a pivoted, extensible boom luffed by a hydraulic ram. The device operates by combining electrical signals corresponding to the actual turning moment of the unloaded boom at given boom positions with generated calibration signals corresponding to the turning moment for the theoretical maximum load at the boom positions, by comparing these combined signals to the safe load signals from the crane's law generator unit and by adjusting the law generator unit accordingly.

REFERENCES:
patent: 4003482 (1977-01-01), Cheze

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