Fairbairn, William, Sir, 1789-1874 · London, Longman, Green, Longman, Roberts & Green · leaf 173
its own diameter. It is made to revolve on its axis by means of a belt and pul-leys, at a velocity correspondingwith that of the elevators, and,beinof restricted from movino- lonm-tudinally, the threads, or ratherleaves, of the screw force thegrain introduced at one end ofthe trough to the other.… … COEN-MILL MACHINERY. 141 6 feet lengths, each length being in the form of a tube 3^inches in diameter, and about -^- of an inch thick, with broadleaves or threads cast round it, after the manner of an archime-dian screw. The thickness of the threads does not exceed -fj ofan inch at the outer…
Mills and mill-work · Machinery
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