Handcranked chaindriven wheelchair, by Richards(?), United Kingdom, 1910-1920.
Most manual wheelchairs are powered by the user turning the wheels directly. This chair, by contrast, is driven via chains by two hand cranks either side of the user. The chair has three main wheels. With a supportive wheel at the rear, flanked by two small stabilising castors for balance when turning, the chair let the user drive without bending to turn the wheels. The mechanism allegedly needed less effort to turn the wheels. It was made by British company Richards.