Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 342
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 hammer by disengaging thebell-crank catch /\ Used for smallwork. MILL AND FACTORY APPLIANCES. 33^ … ^3^5- FRICTION DROP Hx\MMER.—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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