What geometric machine did Leonardo da Vinci design to multiply force through several pulleys?

Leonardo da Vinci designed a block and tackle to multiply force through several pulleys.

A block and tackle combines multiple pulleys mounted in fixed and moving blocks. The load is distributed across several sections of rope, so a smaller force can lift a heavier load, although the rope must be pulled a greater distance. Leonardo studied this arrangement in connection with cranes, hoists, and construction machinery.

The principle predates Leonardo by many centuries. Ancient engineers used pulley systems, and the Greek mathematician Archimedes is traditionally associated with demonstrations of compound pulleys. Leonardo’s notebooks show his detailed interest in how pulley layouts changed force and movement.

The mechanism does not create energy or eliminate work. It trades distance for force: increasing mechanical advantage means more rope must move for the same rise in the load.