Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 95
the hammer up again. If it be desired to give a series of heavy blows, the latch is thrownback, and the hammer is allowed to rise until it strikes a projection on the drop-rod. It thus liftsthe latter, causes a separation of the rolls, and falls. By this arrangement the hammer may bemade to follow… … ^ ^ £^& 2272
Mechanical engineering -- Dictionaries
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