3 min.
A 1967 foot-powered tool you could build today—if you wanted to
FROM ANCIENT treadwheel cranes to modern guitar effects pedals, the creative energy of our feet has come a long way. Roman aqueducts, medieval castles, and Gothic cathedrals were raised, mega-stone by mega-stone, by machines powered by human-size hamster wheels. Treadles, or foot levers, made their debut in the Middle Ages to power looms and spinning wheels. The stair climber got its start in 1818 as a prison treadmill—not to intentionally torment England’s inmates (as sometimes alleged), but to put their feet to work, turning gears to pump water and grind corn. In the late 19th century, pedal power took a fresh turn as artisans used the wheels of stationary bikes to spin up their wood lathes, bandsaws, drill presses, and knife grinders. By the early 20th century, even percussionists were…
