The Steam Engine
As soon as miners had to dig deeper to excavate coal, or any other mineral, they were faced with groundwater. They had to use pumps, operated by workers or operated by horses. The proprietor of a colliery at Griff, in Warwickshire, for example employed 500 horses, at an expense of 900£ a year [1]. Apart from the costs the stables for 500 horses must have taken quite a space. Steam operated devices were the answer to this problem.
year | |
---|---|
1698 | Thomas Savery: atmospheric water pump |
1712 | Newcomen: piston and balancier |
1765 | Smeaton's optimization of the Newcomen steam engine |
1765 | James Watt | : condenser
1781 | Jonathan Hornblower: compound steam engine |
1799 | Richard Trevithick: high pressure steam engine |
1800 | James Watt's condenser patents expires |
1849 | George Henry Corliss: Corliss-type steam engine |
1862 | The Allen steam engine (later called Porter-Allen) |
1884 | Charles Algernon Parsons: steam turbine |
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[1] John, Farey, A treatise on the steam engine : historical, practical, and descriptive, London 1827, page 128; available INTERNET ARCHIVE