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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 338

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 338
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 … 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 eccentricsleeve shaft with a lever and lanyard to throw the rollout of contact with the board at the proper time forlong or short drop. The other roll and shaft…

Mechanical movements

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