G - Physics – 08 – B
Patent
G - Physics
08
B
340/133
G08B 21/00 (2006.01)
Patent
CA 1297552
- 22 - ABSTRACT OF THE DISCLOSURE This is a method of apparatus for monitoring the effective load carried by a crane having a luffing boom of variable effective length. The method includes generating a signal corresponding to the magnitude of the load supported by the boom and then a second signal corres- ponding to the effect of the radius. Calculations are made to calculate a load/radius value and displaying same. This is then compared with a predetermined maximum permis- sible load/radius value and a warning signal is generated it if differs from the maximum load radius value by less than a predetermined amount. The apparatus provides apparatus for carrying out the method by generating a false signal corresponding to the load supported by the boom and includes processing means for performing calcula- tion of the signals to derive the load radius value and displaying same and memory means for storing a predeter- mined maximum permissible load radius value and compara- tive means for comparing the calculated load radius value with a predetermined maximum permissible load radius value.
572339
Ade & Company
Nield Barry J.
LandOfFree
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