From Leonardo da Vinci, Codex Atlanticus, f. 138r.
Construction, loading and unloading materials.
Winch with a geared power-reducer system.
Elevator originating from Vitruvius used often in ancient times for its operational versatility. The cone-like bottom and the base with wheel enable the machine to move and rotate easily. The cable supporting the top of the crane enables the mount to tilt.
Dimensions: Considering that the lower handle was to be moved manually, this could have been a lever arm that when turning covered a circumference of about one meter in width. If we consider the design realized to scale, then, we must imagine the machine about ten meters tall.
Reconstruction: the cart as Leonardo drew it appears to need a guide. The pinion is depicted too small and would not be able to correctly gear in the teeth of the larger wheel.