This section is from the book "Applied Science For Metal Workers", by William H. Dooley. Also available from Amazon: Applied Science For Metal Workers.
The steam hammer is a forge hammer consisting of a steam cylinder placed vertically over an anvil. The trip or hammer-head rises and falls by the power of steam. The trip is controlled by a lever, which is generally operated by a hammer boy. The work is carried to the hammer by means of hooks, and held in place by special tongs. A large portion of steam hammer work is drawn out to templates.
 
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