Newcomen Atmospheric Steam Engine
An illustration of Newcomen atmospheric steam engine. The boiler heats the water to build up steam in the piston. While the steam lever closes, the water is let in, and the piston compresses the steam to generate energy. The compressed steam turns to liquid, and opens the steam valve.
Derr, Louis Cyclopedia of Engineering (Chicago, IL: American Technical Society, 1911)
Courtesy the private collection of Roy Winkelman