The Little Mechanism That Made Precise Time-keeping Possible | Hackaday
Circular Pallets Deadbeat Escapement - YouTube
Escapement Clock Mechanism by Claus Lunau/science Photo Library
The Recoil Anchor Escapement Mechanism | 3D Printed - YouTube
Pendulum or oscillating clock mechanisms, showing escapement mechanism, curved metal strips to check swing of pendulum, and clock with pendulum and weights] | Library of Congress