File:Factory and industrial management (1891) (14778859624).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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ft ground so that it requires much ingenuity to keep the ap-paratus and cars on the track, for the slightest accident or delaymakes a serious difference in the contractors output; no money ismade when the shovel is not actually digging, although the expensegoes on. While the majority of shovels are built to run on standard-gauge tracks, a few are constructed for very broad gauges, and stillothers, having very wide wheels and called traction shovels, are madeto travel on the ground without any track. Still another class, whichis coming more and more into use, is built something after the prin-ciple of a locomotive crane so that it can revolve completely around,through 360 degrees, and is used principally for digging cellars andhandling the material in yards of manufacturing concerns. The smaller shovels have a vertical boiler, while the larger sizescarry a horizontal boiler of the locomotive type; generally lOO-poundssteam pressure is used, though occasionally this is increased to 140.
Text Appearing After Image:
BUCYRUS STEAM SHOVELS AT WORK.The upper one is a 65-ton shovel at the Rio Tinto mines, Huelva, Spain, The lower is a 95-ton at the plant of the Edison Portland Cement Co., Stewartsville, N. J.•>. Built by the Bucyrus Co. 193 t94 THE EMGlNEEklNG MAGAZINE. The up-to-date machines have three pairs of engines. The pair forforcing the dipper into the ground is carried on the boom itself, whilethe pairs for hoisting and for swinging are placed on the car whichalso carries the coal bin and water tank. A good i)i cubic-yardshovel has a hoisting engine with cylinders about 7 by 10 inches andboom and swinging-gear engines of about 5 by 6-inch cylinders, witha 4-foot diameter by 8-foot high boiler. The hoisting chain is about%-inch diameter, and the total weight of the machine 24 tons. A5 cubic-yard machine weighing about 95 tons has 14 by 16-inchcylinder hoisting engines, and boom and hoisting engines with cylin-ders about 9 by 9 inches each, the hoisting chain being i^ inch. A i^ cubic-ya

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