Meet the Dynasphere or “Jumbo”, as it was also known, a “one wheel, 4-seater” devised by a Dr. J. A. Purves in 1932. The Dynasphere had a 2.5 horsepower and could reach speeds of up to 25 miles per hour, it was “an invention of spherical motion” intended to one day revolutionize transportation. For some reason it never caught on, though Mr. Garrison tried something similar with his “gyroscope-powered monowheel” in the cartoon series South Park.
View photos of Dynasphere testing on Weston beach here.
Via British Pathe