an early type of steam engine, in which a pivoted beam is vibrated by a vertical steam cylinder at one end, so that it transmits motion to the workload, such as a pump, at the other end
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for beam engine
The beam-engine is a peculiarly American type, seldom if ever seen abroad.
Stevens continued his work of improving the beam-engine for many years.