An escapement is a mechanical device used in timekeeping instruments, such as clocks and watches, to control the release of energy from a power source. It allows the gear train to advance at a steady rate, ensuring accurate time measurement. The escapement converts the continuous motion of the gear train into discrete, controlled movements. The most common type of escapement is the anchor escapement, which uses a pallet to catch and release the gear teeth. This mechanism is crucial for regulating the oscillation of the balance wheel in mechanical watches, contributing to their precision and reliability.