Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 756
ith the armature, but there is a commutating switch which whenclosed gives the same kind of control as used for lowering with the 13-inchammunition hoist described above; this control is used for lowering and BOAT CRANES. 743 rotating, since it gives a smoother stop, and the rheostatic control is… … Fig. 5. Diagrams of Connections for Boat Crane Motors The weight of the complete crane is 54,000 pounds. Motor is 50 H.P,, 400 r.p.m., is entirely inclosed and water-tight, andweighs 5,890 pounds. Current is supplied through collector rings mountedon the cranes. The controller is water-tight, and…
Electrical engineering
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