Chapter 1 - Introduction

Summary

Synchronization in historical perspective

The Dutch researcher Christiaan Huygens (Fig. 1.1), most famous for his studies in optics and the construction of telescopes and clocks, was probably the first scientist who observed and described the synchronization phenomenon as early as in the seventeenth century. He discovered that a couple of pendulum clocks hanging from a common support had synchronized, i.e., their oscillations coincided perfectly and the pendula moved always in opposite directions. This discovery was made during a sea trial of clocks intended for the determination of longitude. In fact, the invention and design of pendulum clocks was one of Huygens’ most important achievements. It made a great impact on the technological and scientific developments of that time and increased the accuracy of time measurements enormously. In 1658, only two years after Huygens obtained a Dutch Patent for his invention, a clock-maker from Utrecht, Samuel Coster, built a church pendulum clock and guaranteed its weekly deviation to be less than eight minutes.

After this invention, Huygens continued his efforts to increase the precision and stability of such clocks. He paid special attention to the construction of clocks suitable for use on ships in the open sea. In his memoirs Horologium Oscillatorium (The Pendulum Clock, or Geometrical Demonstrations Concerning the Motion of Pendula as Applied to Clocks), where he summarized his theoretical and experimental achievements, Huygens [1673] gave a detailed description of such clocks.