Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in constructive and operative machinery and the mechanical arts, being practically a mechanical dictionary, commencing with a rudimentary description of the early known mechanical powers and detailing the various motions, appliances and inventions used in the mechanical arts to the present time, including a chapter on straight line movements, by Gardner D. Hiscox (1914)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 342
1364. HELVE TRIP HAM-MER.—An ancient device yet inuse. The treadle stops the actionof the hammei by disengaging thebell-crank catch h. 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 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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