Handbook of construction plant, its cost and efficiency (1918)
Dana, Richard Turner, 1876-1928 · New York, McGraw-Hill book company, inc., [etc., etc.] · leaf 601
Fig. 287. No. 1 Revolving Shovel Excavating Cellars. … Fig. 288. 598 HANDBOOK OF CONSTRUCTION PLANT was also driven by this motor. The swinging machinery wasgeared to a 50 hp. motor, and the thrust motor was also 50-hp.The compressor which furnished air to the hoisting drum brake,the emergency brake on the swing motor, and the friction clutchand brake…
Contractors' operations · Building
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