Patent Model - Improvement in Hydraulic Mining Apparatus

Maker and role
George Cranston, Patentee
Production date
Nov 05 1878
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Object detail

6 1/2 x 12 x 12" (16.5 x 30.5 x 30.5cm)
Canston's patent is an improvement to his patent #185,216 for a hydraulic-mining apparatus issued on Dec. 12, 1876. In addition to an improved hydraulic-current elevator and mining-sluice, he also "arranged a wasteway... which...can draw off from the flume or sluice a portion of the water after it has been utilized for raising the tailings or earthy matter, and conduct it back into the tail of the machine, where it can be reused as a diluent for the new matter which enters the conductor-pipe." (Patent Number 209,661)
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