Classic Escapement - Recoil (Common)

grabcad

This project is based on Mark V. Headrick's book, "Clock and Watch Escape Mechanism," which can be found publicly at http://www.nawcc-index.net/Articles/Headrick-EscMechanics.pdf. The Recoil escapement, presented in the book on page 16, is featured here as opposed to the Graham (dead-beat) escapement from previous projects. In the Recoil escapement, the wheel moves backward in addition to forward due to the left arm of the pallet lacking positive effect, acting more as a recoil mechanism. This design returns a portion of the pendulum's energy to the reel but may cause accuracy loss due to the challenging control of the backward movement. The common variant of Recoil escapement in this project features a bent-bar pallet design based on the Graham (Ideal) escapement, as seen in the book's pictures. The design includes a "Basic Sketch.jpg" that showcases important dimensions from the Graham (Ideal) design. Instructions are provided to slightly shorten the entry pallet and move the exit pallet outward for improved accuracy. Inventor 2014 users can utilize Dynamic Simulation to experiment with different parameters like torque and rod length. Real-life constructions of the Recoil escapement can be viewed in the provided videos featuring rudimentary (https://youtu.be/pOie2rMdN6k) and professionally adjusted entrance drop (https://youtu.be/Q6hC31fEN2I) designs.