Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 323
from ore concen-tration works or other refusethat can be conveyed by compressed air. 1259/t. AUTOMATIC AIR DUMP.—The cable from thedrum runs over a sheave on a movable truck on inclined rails. Astop at each end of the run limits the run of the truck. A baracross the frame at the middle post holds a…
Mechanical movements
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