Metal working – Method of mechanical manufacture – Electrical device making
Patent
1976-09-13
1977-09-06
Oresky, Lawrence J.
Metal working
Method of mechanical manufacture
Electrical device making
29431, 212 17, H01R 4300
Patent
active
040458660
ABSTRACT:
In building a crane, the electrically actuated winches for raising and lowering the boom for moving a trolley along the boom, and for operating a hoist on the trolley are fixedly mounted in a standard transport container at a construction site remote from the assembly site for the crane. The power supply system for the winches, including a step-down transformer and switch gear, is similarly mounted in a second container remotely from the assembly site. The two containers and their contents are lifted to the top of the erected crane tower and permanently fastened there. The winch motors are connected to the switch gear by a plug-in, multi-conductor cable, and the winches are connected with the boom, the trolley, and the hoist by steel cables or other tension elements. Labor for installing the winches and the associated electrical system is reduced and damage to the relatively sensitive machinery during assembly with other crane elements is avoided.
REFERENCES:
patent: 2676388 (1954-04-01), Faure et al.
patent: 2958940 (1960-11-01), Murphy
patent: 3372475 (1968-03-01), Vickery, Jr.
patent: 3888356 (1975-06-01), Redelfs
patent: 3909935 (1975-10-01), Aldridge et al.
patent: 3945107 (1976-03-01), Houck
patent: 3945503 (1976-03-01), Cooper
Berman Hans
Oresky Lawrence J.
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