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Balance
From the collection of National Museum of American History. Free to download, adapt and use — no permission needed.
About this work
Patent model for Johann Heinrich Ehrhardt, “Improvement in Machines for Determining the Load of Car-Axles,” U.S. Patent 52,653 (Feb. 13, 1866). A brass tag on the frame reads “H. Ehrhardt / Dresden.” Ehrhardt's platform scale was designed to balance the load of locomotives and other railroad cars, so as to equalize the pressure on each of the wheels.
National Museum of American History’s own descriptionCredit lineBalance. 1866. Ehrhardt, J. H.. National Museum of American History. CC0.
