Crowther's engine

This linkage was designed by Phinehas Crowther (1763-1818). It is an application of James Watt's linkage to steam engines.

You can move the point C up and down, and see how the piston moves in the engine. Of course, it is the piston which really drives this mechanism.

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Chris Sangwin, 19 Feb 2007, Created with GeoGebra