Material handling cyclopedia; a reference book covering definitions, descriptions, illustrations and methods of use of material handling machines employed in industry (1921)
Wright, Roydon Vincent, 1876- ed, Little, John G., joint ed, Augur, Robert C., joint ed · New York, N.Y., Simmons-Boardman Publishing Co · leaf 237
s lines maypass through the mast top. When a derrick is intended for grab bucket operationor for any other service requiring three-line work the der-rick top generally is equipped with a rooster which fitsover the gudgeon and provides a sheave at the mast top.The rooster bracket is fixed in any…
Hoisting machinery · Conveying machinery
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
