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Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 337

An illustration from Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary, 1917, leaf 337
1362. BLACKSMITHS HELPER, orfoot helve hammer. Operated by the footon the treadle. Hammer held up by thespring. 1363. REVOLVING RAPID-BLOW HAM-MER.—The centrifugal action of the revolvingarms throws the hammers outward. … 1364. HELVE TRIP HAM-MER.—An ancient device yet inuse. The treadle stops the actionof the hammei by disengaging thebell-crank catch b. Used for smallwork. MILL AND FACTORY APPLIANCES. 331

Mechanical movements

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