Hopper boy

a rake in a mill, moving in a circle to spread meal for drying, and to draw it over an opening in the floor, through which it falls.

See also: Hopper

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Evans developed a machine, appropriately named a "hopper boy," that performed the operation with a large mechanical rake inside an enclosed bin.
Perfecting the grist mill: delaware man's designs pushed mill into a new era
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