Leonardo da Vinci designed an escapement mechanism intended to regulate clock movement.
An escapement controls the release of energy from a clock’s driving mechanism in measured steps. Leonardo’s drawings include an early escapement concept associated with pendulum timekeeping, although the modern pendulum clock was developed later by Christiaan Huygens in the 17th century. Leonardo’s mechanism showed an understanding that regular oscillation could help divide time more consistently.
The design should not be described as a completed modern pendulum clock. Leonardo’s sketches were exploratory, and there is no evidence that he built a clock using the exact mechanism shown. His work belongs to a long history of attempts to improve mechanical timekeeping through controlled motion.
An escapement is different from a pendulum. The pendulum provides a regular oscillation in a pendulum clock, while the escapement transfers that timing into stepped wheel movement and prevents the mechanism from unwinding freely. This distinction is a common source of confusion.