Traversing hoists – With haul-in line
Patent
1979-04-18
1981-06-16
Marbert, James B.
Traversing hoists
With haul-in line
B66C 1900
Patent
active
042732433
ABSTRACT:
This invention relates to a load centering device for use in combination with a crane system. The crane system has a cable winding unit with a cable having at least one end secured thereto. The cable supportably passes through a traveling block that includes a hook to be secured to a load to be lifted. The crane system includes a load centering device that has a null condition when the crane system is not in use and the load centering device is in a predetermined spatial relationship with a vertical line and a line which is coincident with the cable center line in the region between the traveling block and the cable winding unit. The load centering device includes a plurality of electrical switch means spatially positioned in respect of the cable such that relative movement of the cable from said predetermined cable center line, vertical line spatial relationship actuates at least one of said electrical switches to provide an indication that the null condition has been disturbed and that said load lifted while said indication is present will not receive optimal lifting from said traveling block of said overhead crane system.
REFERENCES:
patent: 3228019 (1966-01-01), Visceglia
patent: 3734539 (1973-05-01), Salmi
patent: 3826380 (1974-07-01), Lenander
patent: 3848750 (1974-11-01), Hoge
Marbert James B.
Williamson Harold A.
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