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Denis Papin's contribution
Denis Papin's heat engine used a piston to do work, and it's shape resembled a pump-jack. He developed this engine because of the discovery of a german physicist, Otto Von Guericke, who concluded that when you fit two hollow hemispheres together than the air inside the tubes would allow anything to pull them apart. -
Thomas Savery's Contribution
Thomas's invention was a steam-powered pump. This engine would assist in pumping water out of mines, and as the name suggests it resembled a pump-jack. -
Thomas Newcomen's Contribution
This engine used steam as the main force of production and was also considered to be a pump-jack which would pump water. The difference between his invention and Savery's was that Newcomen's engine could pump water at higher distances. -
James Watts contribution
James Watt improved the Newcomen engine by adding an extra condenser to reduce the amount of heat needed to operate the machine. This invention, because it was playing off of Newcomen's invention, would be considered to be a pump-jack. -
Hero's Contribution
His engine did not have a piston and was named the aeolipile. How it works is that a sphereical object is placed on a stand and heated either inside the object or on the bottom of it and then heat is emitted from the tubes placed at the sides of the object. The positioning of the tubes then allows the steam to project the spherical object forward to go in a circle.
