What mechanical feature did Leonardo da Vinci’s robot knight use to move its arms and jaw?

Leonardo da Vinci’s robot knight used cables and pulleys to move its arms and jaw.

Leonardo designed the mechanical knight around 1495 for a pageant at the court of Ludovico Sforza in Milan. The machine was placed inside a suit of armor and contained a system of pulleys, cables, gears, and cranks. These components translated motion from an operator or internal mechanism into movements such as raising the arms and moving the jaw.

The design is known from Leonardo’s notebooks, especially drawings connected with his studies of anatomy and mechanics. It was not an autonomous robot in the modern sense. There was no electronic control, computer, or artificial intelligence; the machine was a programmable mechanical automaton operated through physical linkages.

In 2002, engineer Mark Rosheim built a working reconstruction based on Leonardo’s sketches. The reconstruction helped show how the proposed mechanism could produce humanlike movements, while also highlighting that parts of the original design remain interpretive because Leonardo left no complete surviving machine.