File:Factory and industrial management (1891) (14594550099).jpg

Identifier: factoryindustria35newy (find matches)
Title: Factory and industrial management
Year: 1891 (1890s)
Authors:
Subjects: Engineering Factory management Industrial efficiency
Publisher: New York (etc.) McGraw-Hill (etc.)
Contributing Library: Engineering - University of Toronto
Digitizing Sponsor: University of Toronto

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when electricityis the motive power. In the picture the operator is seen standingin the rigid arm of the bucket itself; so he is always in the right placeto see when and where the jaws should be shut. This is a part ofone of those immense cranes of the National Tube Company atLorain, Ohio, where the Lake Boats are unloaded. Two of thesemachines have unloaded an average of 500,000 tons of ore each in oneseason. When steam power is used it is supplied from a 175 horse-power boiler of the locomotive type, operating a steam pump capableof supplying the necessary amount of water at a pressure of1,000 pounds per square inch. Hydraulic cylinders are used to open,close, and rotate the bucket, to move the trolley, and to raise or lowerthe walking beam. Another engine is used for moving the machineitself along the dock and handling the bucket car. When run by elec-tricity the motors take their current by sliding contact from lineslaid along the dock, using 80 horse-power motors for handling the
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REVOLVING STEAM SHOVEL IN OPERATION.Will rotate in a complete circle; with a ^; cu. yd. dipper, will cut 600-900 cu. yd. in a 9-hour day. Can be converted into a locomotive crane, fitted with clam-sheli or orange-peel bucket, provided with timber hooks and used as a log loader, etc.The Browning Engineering Co. Moisting and handling machinery. t9t bucket, 150 horse-power for hoisting the walking beam, and a 50horse-power motor for trolleying in and out; a 200 horse-powerengine is required for moving the machine itself and the bucket car.The controllers are of magnetic type and are naturally built for heavyservice. The total cost of one of these ore unloaders is about $QO,ooo.

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