Hartman's Compound Impulse Turbine

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“In 1858, Hartman Bros. patented a turbine consisting of two revolving disks c and c’ fixed to a shaft D. Between them was a segment of stationary reversing blades d d. Steam entered from a nozzle F and was exhausted at H; G is the casing.” —Derr, 1911


Derr, Louis Cyclopedia of Engineering (Chicago, IL: American Technical Society, 1911)


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