science · 05 December 1854 · 170 years ago
In 1854, Aaron H. Allen of Boston, Mass. was issued a U.S. patent for a folding chair as an "Improvement in Self-Adjusting Opera-Seat" for theatres or other public buildings. (No. 12,017) The pivoted seat was constructed with weights or springs to assume and retain a vertical position when pressure upon it is relieved as the occupant rises from it.
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