Last updated: July.15, 2023

language=English / Japanese

Theory of Horology

　　　　

The photo is grand complication I made.　The parts manufacturing completed at Nichinan Co.,Ltd.

Grande Sonnerie Minutes Repeater Tourbillon

　　　　　

This Homepage explains the Theory of Horology　as easy as possible.

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Table of contents: Section 1　Motion of Pendulum: 　　　 Explains the motion of pendulum that is basic of horology Section 2 Motion of Escapement: 　　 Explains the motion of watch escapement Section 3 Isochronous error: 　　　　 　Explains the isochronous error depending on the amplitude Section 4 Numerical analysis: 　　　 　 Explains the numerical analysis methodology on the computer Section 5 Mathematical Formulas:　 　 Explains the formulas of Trigonometric function, Differential and 　　　　　　　　　　　　　　　　　　　　　　　　 Integral　calculus,Laplace transform,Taylor expansion etc. History of Escapement:　　　　　 　　　　 Includes the completion year of H1〜H4 by John Harrison Motion Simulation: 　 　　　　　　　　　　　Grasshopper Escapement is seems to be interesting Knowledge of various matters(trivia): 　General Knowledge of Physics & Mathematics Moon Phase:　　　　　　　　 　　　　　　　　Moon Phase considering "Tilt" Topics:　　　　　　　　　　 　　　　　　　　　 Recent Topics Book1:　　　　　　　　　　　　Book of "Theory of Horology" (English) available now via PayPal Book2:　　　　　　　　　　　　Book of "Materials Mechanics Beam Bending " (English) available now via PayPal Link:　 　　　　　　　　　　　 Link to the homepage of my friends & persons specified　　　 Copyright (C) 2014- Takashi Sasaya All Rights Reserved.