Handbook of construction plant, its cost and efficiency (1918)
Dana, Richard Turner, 1876-1928 · New York, McGraw-Hill book company, inc., [etc., etc.] · leaf 302
^ 1 - .Til-Hl L f^***^ V i97 298 HANDBOOK OP CONSTRUCTION PLANT DOUBI^E CYZiINDEB ENGrlNIlS Class 4. Link motion, single friction drum, elevator sheave.Adapted to general contracting use, and especially for operatingmaterial elevators, and, in larger sizes, for use on barges, docks,etc. Class 5.… … Fig. 113. Double Cylinder, Four Friction Drum, Link MotionEngine. Class 7. Double friction drum engine. Adapted to haulingcars, pile driving, bridge building,, operating derricks, and gen-eral hoisting purposes, circular saws, concrete mixers, centri-fugal pumps, etc. Class 8. Double friction drum,…
Contractors' operations · Building
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