File:Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry (1921) (14773180032).jpg

Identifier: cu31924004680017 (find matches)
Title: Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry
Year: 1921 (1920s)
Authors: Wright, Roydon Vincent, 1876- ed Little, John G., joint ed Augur, Robert C., joint ed
Subjects: Hoisting machinery Conveying machinery
Publisher: New York, N.Y., Simmons-Boardman Publishing Co
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

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positing the metal in the fire. The metal can be with-drawn from the furnace by reversing the charging opera-tion. An advantage of the floor type is that an overheadtraveling crane can be installed above it and be used forother purposes. On another type of overhead crane adapted to chargingor withdrawing slabs or similar pieces, the revolvingcharger operates in a similar manner, but instead of thehinged • charging arm, has guides, in which the arm israised or lowered in a vertical line, on the inside of thelower portion of the pendant structure. The outer endof the charging arm is fitted with end grips instead ofside grips but otherwise operates in a similar manner. Other Mill Service Many other adaptations of the traveling crane to themetal industries have been made. These cranes are de-signed with either the overhead bridge or are of the floortype. They are used extensively in open-hearth plants forplacing the melting stock into the furnace. In such service, 166 HOISTING MACHINERY
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CRANES 167 the metal is placed in a rectangular container having theend designed to engage the end of a revolving chargingarni which extends toward the furnace. By means of thetraversing mechanism, the charging arm is thrust intothe furnace and the metal is deposited by revolving thecharging arm and overturning the container. A crane ofthis type has a charging capacity of from 2^ to 5 tonsand usually is also provided with an auxiliary trolley. Other similar cranes are designed to manipulate hotmetals in the forging shop and to handle copper andother materials during the manufacturing processes. How-ever, as these cranes are modifications or combinations ofthe machines already described and are of a highly special-ized nature, they do not enter into the discussion of ma-terial handling in the commonly accepted meaning of theterm and will not be treated in this book. Traveling Bracket or Wall Jib Cranes Traveling bracket or wall jib cranes may be used asauxiliaries to overhead traveling

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