3492862 Folding Armchair, 1880-90 (walnut, metal) by American School, (19th century); 116.2 long cm; Metropolitan Museum of Art, New York, USA; (add.info.: Cavedra Blake Sheldon designed this folding chair which could assume over fifty positions (by means of a lever at the seat rail) and sold it to the Marks Adjustable Folding Chair Company in New York. They patented it in 1876 and manufactured it for the next twenty-five years. ).