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The contrivance in a time-piece which connects the wheel-work with the pendulum or the balance, giving to the latter the impulse by which it is kept in vibration.

Escapement

The contrivance in a time-piece which connects the wheel-work with the pendulum or the balance, giving…

"A crank which regulates the motion of the chief or escapement wheel of a train of clock-work worked by the pendulum or spring." — Williams, 1889

Escapement

"A crank which regulates the motion of the chief or escapement wheel of a train of clock-work worked…

An illustration of pin-wheel escapement.

Pin-Wheel Escapement

An illustration of pin-wheel escapement.