Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 320
1256. CLAM-SHELL BUCKET, for dredging. Operated by a double chain.One chain is attached to the joint of thelong arms, the other chain passes arounda sheave in the joint of the lazy tongsthat opens the bucket, and is made fast tothe first chain. The bucket is suspendedby the first-named chain to… … 1257. REVOLVING HOISTINGDREDGE, balanced on railwaytruck. Lancaster pattern, withclam-shell bucket. 3IO MINING.
Mechanical movements
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