Theory of Horology

Theory of Horology

　　　　

「Theory of Horology」

Author　Takashi Sasaya

English Translation by Toshihiko Chimura

ISBN : 978-4990912116

Publishing Office　Greenwich Meridian

TEL/FAX +81-467-77-7742

mail meridiangreenwich@gmail.com

Price will be reduced to US $68.00 from US $95.00 by 28%.

Price US $68.00 (including shipping charge and tax)


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　 This book deeply explains the theory of horology.
The newly introduced points in this book from the existing theory of horology
can be summarized as follows:
- Introducing the explanations of fluid dynamics and gravity, the formula of amplitude
　of pendulum and temp was derived. In addition, numerical analysis was also completed.
- The equation of spring torque from the curved beam theory was correctly derived.
- Numerical calculation methodology of Escapement Error by RK 4 (Runge-Kutta method)
　which seems to be world first was introduced.
- How to draw the hairspring after distortion and many useful gnuplot sample programs
　are also contained. 　　　　　　　　　　　　　　　　　　　　　　　　　　　　 　

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　


　

「Theory of Horology」

Contents

1 Motion of Pendulum

2 Air Density & Coefficient of Viscosity

3 Gravitational Acceleration

4 Motion of Balance

5 Spiral Spring Dynamics

6 Isochronous Error

7 Airy's Theorem

8 Escapement Error

9 General Theory of Hairspring

10 Theory of Flat Hairspring

11 Isochronism of Vertical Position

12 Temperature Compensation of Balance

13 Numerical Analysis

14 Appendix