William W. Wythes Cyclo-Ellipto-Pantograph Patent Model.

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This is the patent model for a drawing devices granted US Patent 21,041 to William W Wythes on July 27, 1858. “Be it known that I, WILLIAM WYTHES, of the city of Philadelphia and State of Pennsylvania, have invented a new and Improved Instrument for Drawing and Copying.” (US Patent Application). The Smithsonian also owns a patent model by Wythes for a cloth-measuring machine (US Patent 18313). (The original patent drawings and descriptions can be viewed at Google Patents.) Special about this patent model is that the inventor has engraved “Wm W Wythes, inventor” on the large brass disc on the model. Date: 1850s. Record ID: nmah_904481.

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