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Keywords: Pelton wheel (US Patent, October 1880).jpg Pelton wheel patent png Drawing of an early Pelton wheel also known as Pelton turbine invented by Lester Allan Pelton in the 1870s This figure is from a United States Patent October 26 1880 issued to Lester Allan Pelton US Patent 233 692 1880-10 United States Patent Office Public domain - original work of the US Federal Government The text and figures of all US patents are in the public domain PD-USGov Pelton wheels |