Patent Model - Improvement in Valves for Pumping-Engines

Maker and role
William Harrison (b.1773, d.1841), Patentee
Production date
Sep 28 1875
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Object detail

Wood, brass, steel
7 x 3 x 11" (17.8 x 7.6 x 27.9cm)
The object of Harrison's invention "is to prevent the detrimental shocks which occur in direct-acting pumping and blowing engines, and which are attributable to the too sudden stoppage of the piston on reaching the ends of its stroke, and the too sudden starting of the piston on commencing its reverse movement..." (Patent Number 168,251)
Object number
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