Crane overload detector using a boom bending moment detector

Details Crane overload detector using a boom bending moment detector Crane overload detector using a boom bending moment detector

1975-03-04

1976-07-20

Swann, III, Glen R.

Communications: electrical

Systems

Call station

212 39R, 340272, G08B 2100

Patent

active

039710084

ABSTRACT:
For a crane having a boom for hanging loads apparatus for detecting overload is provided which comprises a boom bending moment set value generator, which is determined by a variable quantity corresponding to the operating radius of the crane, a boom bending moment detector having transversely spaced strain gauges mounted on the boom, a comparator for comparing the output of the boom bending moment set value generator with the averaged output of the boom bending moment detector, and means operated by the output of the comparator which is produced when the output of the detector exceeds the output of the boom bending moment set value generator.

REFERENCES:
patent: 3199685 (1965-08-01), Bopp
patent: 3638211 (1972-01-01), Sanchez
patent: 3638212 (1972-01-01), Peter et al.
patent: 3815116 (1974-06-01), Fink

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