Miscellaneous U.S. elevator patents
A collection of United States patent drawings from 1880 gathered by the Smithsonian Libraries, showing mechanisms for elevators and lifts as engineers recorded them for patent filings. The pictures are precise black-and-white line diagrams of pulleys, cables, counterweights, cars and shaft guides, with lettered parts and numbered figures, offering a designer clear models for mechanical linework and technical labelling.
