The Mechanics of the Swiss Lever Escapement

  • Ruxu Du
  • Longhan Xie
Part of the History of Mechanism and Machine Science book series (HMMS, volume 21)


As presented in the previous chapter, there have been many different kinds of escapements. Though, at least 98% of the commercial mechanical watches today use the Swiss lever escapement. In this chapter, the Swiss lever escapement is studied in detail. Its working principle is illustrated and its dynamical model is derived. Experimental validation is also briefly discussed.


Angular Displacement Angular Acceleration Balance Wheel Contact Radius Impulsive Differential Equation 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.The Chinese University of Hong KongHong KongPeople’s Republic of China
  2. 2.South China University of TechnologyGuangzhouPeople’s Republic of China

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