New York , NY
Double Oscillating Steam Engine
Photograph - Photograph
An illustration of a double oscillating steam engine, created by Elisha Graves Otis (1811-1861) as a "power plant" exclusively for elevators. Otis, an American, invented a safety device that prevented elevators from falling if the hoisting cable broke.
March 6th, 2013
Viewed 59 Times - Last Visitor from (n - Japan on 06/25/2015 at 1:35 AM