AMERICAN INDUSTRIES SINGE COLUMBUS. 



335 



manufacture of the " Nasuiy th direct-acting steam hammer " was 

 commenced in the year 1843, by Messrs. Merrick & Towne, at the 

 South wark Foundry, Philadelphia, Pa. The " Nasmyth ham- 

 mer/' as at first constructed at this establishment, is represented 

 by Fig. 29, in which AAA are the two upright frames of cast 

 iron, which supported a lintel, C, that sustained the steam-cylin- 



^Si 



Fig. 29. The Nasmyth Steam Hammer. 



der, D, and its steam-chest, J. The piston-rod, E, was secured at 

 its lower end to the " hammer-block," F F F, which was free to 

 move vertically between, and was guided by, the upright frames, 

 AAA. The valve-gear is shown on the left-hand frame, A, 

 which actuated the valve in the steam -chest, J. The intensity or 

 working force of the blow delivered to the work upon the anvil 



