File:Factory and industrial management (1891) (14594590309).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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^ turninghis switch for an instant, he can drop the bottom plate and turn thecurrent on again in time to prevent the rest of the plates from falling. HOISTING AND HANDLING MACHINERY. 203 It is not difficult to comprehend what a labor and time-saving devicethis is, doing away with all hooks or grapples and men to adjust them,especially where they would have to pry up the plates or other piecesto get the hooks or chains under. While the principle has been known these many years, the detailsof the practical lifter have required much recent study and experi-
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\ lO-INCH CUTLER-HAMMER MAGNET LIFTING THE BODY OF A 50-INCH MAGNET. The casting, ready for insertion of the coil and coil shield, weighs about oOOO lb. and is of awkward shape to handle with slings. An apt illustration of the advantages of this mode of handling castings is thus afforded. Cutler-Hammer Mfg. Co. 204 ^^/^^ ENGINEERING MAGAZINE. ment, as the magnets have to be adapted for each kind of work; forinstance, one that will readily lift a 10,000-pound ingot will not lifta long thin piece weighing only 1,000 pounds, or even a single pieceof pig iron weighing only 100 ))()un(ls from a pile of pig. The de-sign of a magnet to lift from 20 to 25 pieces of pig at a time withouthaving the current scattered all over the pile, gave a vast amount oftrouble before success was reached. Mr. S. Piek has designed amagnet werghing 5,000 pounds, which uses 27 amperes at 220 volts inlifting about 25 pieces of pig iron from an indiscriminate pile, evencausing the pig to jump vertically from 4 to

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