Geared windlasses with toothed wheels for hoisting
Compound wheel-and-pinion machines for raising weights
The upper diagram shows a long horizontal axle carried in a slotted frame, its shaft ending in a pair of large toothed wheels turned by a T-shaped crank, with cups along the shaft and weights hung from cords on tripod supports at either end. The lower diagram shows a great spoked wheel carrying an internal train of small pinions and coupled to a long screw-shaft that runs up an inclined block, forming a compound hoisting machine. Both are studies of gear-and-pinion trains that convert a hand crank into a slow, powerful lifting motion. The page also carries several lines of Leonardo's notes that are not transcribed in this bundle.
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Geared axle with paired toothed wheels
A horizontal axle rests in a slotted timber frame and terminates in two large toothed wheels engaged with pinions, driven by a T-shaped crank at the top. Rows of cups along the shaft and weights hung from tripod stands at either end indicate the loads the mechanism is meant to raise.
Spoked wheel driving a screw up an incline
A large spoked wheel carries an internal train of small geared pinions and is coupled to a long screw-shaft leading to an inclined block at the right. The arrangement translates the wheel's turning into a slow, forceful advance suited to lifting heavy loads.