Section 1: Clock Escapements (for beginners)

Introduction. Page 3

1. Efficiency and Power Losses. Page 4

2. Drawing an Escape Wheel. Page 5

3. Drawing the Graham Pallets. Page 6

4. The Graham Explained. Page 8

5. The Importance of the Simulation. Page 11

6. The Recoil Escapements. Page 16

7. The Brocot Escapement. Page 18

8. The Pin Wheel Escapement. Page 19

9. Other Design Considerations. Page 20

10. The Graham Reconsidered. Page 22

11. Efficiency in Numbers. Page 23

Section 2: Watch Escapements (for more advanced designers)

12. Drawing the Club-Tooth Escape Wheel. Page 41

13. Drawing the Pallets. Page 44

14. Changing the Design. Page 50

15. Improving the Design. Page 53

16. The English Lever. Page 57

17. The Pin Pallet Escapement. Page 60

18. The Cylinder Escapement. Page 61

19. The Duplex Escapement. Page 63

20. The Chronometer Escapement. Page 67

21. Daniel's Independent Double-Wheel Escapement. Page 72

22. The Double-Roller. Page 79

Section One Notes

The first nine chapters are explained without math. These chapters are less complicated, and they introduce the reader to the logic behind the drawing techniques, so as to serve the needs of those who want to learn about escapements but would not be drawing them on their own computers. The tenth chapter explains the math behind the previous chapters. This way the reader has the option whether or not to become involved with the math.

Section Two Notes

Chapters 12 to 18 are similarly presented in order to introduce the reader to the logic behind the drawings, though these drawings are more involved and require some understanding of watch theory, such as lock, drop, draw, and impulse. These drawings are not simplified (as in Section 1) and are shown in full detail with full method outline. Chapter 19 and beyond become more involved with the math that is required to create the drawings. The reader who does not want to become involved with the math could benefit from the logic of the latter chapters by passing over the math.

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Escapements in Motion