Safety device for a crane

Details Safety device for a crane Safety device for a crane

1975-11-19

1977-01-18

Werner, Frank E.

Traversing hoists

Overhead

Cable

340267C, 212 55, 212 46R, B66C 1348

Patent

active

040034828

ABSTRACT:
A safety device for a crane compares two signals, one of which represents the actual load in any configuration of the crane and the other of which represents the permitted or critical load in that configuration, and produces a third signal when the first signal exceeds the second signal. This third signal is used to actuate an alarm device or to prevent a dangerous maneuver from being continued by the crane.

REFERENCES:
patent: 2030529 (1936-02-01), Nash
patent: 2858070 (1958-10-01), Scharff
patent: 3200963 (1965-08-01), Veimes
patent: 3638211 (1972-01-01), Sanchez
patent: 3641551 (1972-02-01), Sterner et al.
patent: 3680714 (1972-08-01), Holmes
patent: 3724679 (1973-04-01), Brownell et al.
patent: 3740534 (1973-06-01), Kezer et al.

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