Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 340
evice yet inuse. The treadle stops the actionof the hammer by disengaging thebell-crank catch />. Used for smallwork. MILL AND FACTORY APPLIANCES. 33^ 1365. FRICTION DROP HAMMER.—The ham-mer head is attached to a hardwood board running be-tween friction rolls. One of the rolls has an…
Mechanical movements
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