Horse-Powered Machine Used to Run Separator at the Ford Homestead Barn, 1924

As farmers mechanized barn and farmyard work in the nineteenth century, they began to use stationary power sources. Some invested in "sweeps," which converted energy generated by horses walking in a circle into power to operate large machines like grain threshers or separators. Sweep operators hauled these devices on specially designed wagons from farm to farm during threshing season.