Image: Grasshopper escapement
Description: A diagram of the grasshopper escapement invented by British clockmaker John Harrison in 1722. An escapement is a mechanical linkage in a clock that gives the clock's pendulum periodic pushes to keep it swinging, and releases the clock's gear train to advance a fixed amount each swing, moving the hands forward at a steady rate. The grasshopper was an unusual low friction escapement that was used in a few clocks made by Harrison and the Vuillamy brothers, but did not see wide use.
Title: Grasshopper escapement
Credit: Retrieved May 29, 2014 from Abraham Rees, Ed. (1820) The Cyclopaedia, or Universal Dictionary, Vol. 2, Longman, Hurst, Rees, Orme, and Brown, London, "Horology", Plate 33, fig. 5 on Google Books
Author: Unknown authorUnknown author
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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