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Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.
Principle of rope-shovel operation. [1]A power shovel, also known as a motor shovel, stripping shovel, front shovel, mining shovel or rope shovel, [2] is a bucket-equipped machine usually powered by steam, diesel fuel, gasoline or electricity and used for digging and loading earth or fragmented rock and for mineral extraction. [3]
The electric chain hoist, also known as the "electric hoist", is the least used type of engine crane. The operation is similar to the chain hoist in the way that chains are used to lift the engine. The electric chain hoist uses an electric motor operated by remote control to lift the engine, unlike the chain hoist where the operator has to ...
[2] [3] The steam shovel was invented by William Otis, who received a patent for his design in 1839. The first machines were known as 'partial-swing', since the boom could not rotate through 360 degrees. They were built on a railway chassis, on which the boiler and movement engines were mounted. The shovel arm and driving engines were mounted ...
In addition to powering the hoist, it provided locomotive power and could move the shovel at speeds of a one-quarter mile per hour (0.40 km/h). About 50 feet (15.24 m) of the hoist chain has been removed. [5] Shovel with treads visible. Both of the other engines have an 8-inch (203 mm) bore.
In 2012, a 22,000-tonne (21,700-long-ton; ... Workstation Gantry Cranes can be outfitted with either a wire rope hoist or a lower capacity chain hoist. Gallery
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