Model of Savery's engine.

Model Savery engine, before 1754. Thomas Savery (1650-1715) patented his design for a steam engine to raise water in 1698. The steam was heated under great pressure in the boiler, then let into the cylinder where it forced the water upwards. The steam was then condensed using a jet of cold water, and the next load of water was let into the receiver from below. Savery engines were very dangerous and not very efficient. However they represent one of the first attempts to harness the power of steam. This model is associated with Dr. Stephen Demainbray (1710-1782), a lecturer on experimental philosophy.