Steam Hammer
a hammer worked by means of steam. The idea of a steam hammer seems to have occurred first to James Watt, who patented it in 1784.
William Deverell also took out a patent for a steam hammer in 1806; but it does not appear that in either case the idea was carried into operation. In 1839 James Nasmyth invented the steam hammer called after him, and patented it in 1842. In the older forms of steam hammer, the hammer head, attached to one end of a lever, was raised by the action of a cog wheel or cam acting on the other end of the lever, and was then allowed to fall by its own weight. Hammers of this description are often called steam tilts. In Nasmyth's hammer the head is attached to the piston rod of an inverted cylinder supported vertically, and the piston is raised by the action of the steam admitted into the cylinder below the piston. The hammer is allowed to fall by its own weight, or is driven downward with still greater ve- STEAM NAVIGATION. See SHIP locity by the action of steam admitted and SHIPPING.
See STEAM TURBINE and STEAM.