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electric clocks

 A history of the evolution of electric clocks

by J. E. Bosschieter
the following text is an extended version of an article published in 2000 in TIJDschrift edited by the Federatie van Klokkenvrienden, Holland

This website is an attempt to describe the history of the development of electrical horology that eventually led to the Synchronome-Shortt free pendulum. It is certainly not complete and many parts of this evolution are omitted for the sake of simplicity. The emphasis is put on technical details and for that reason many animations are shown.

The use of animations is a powerful tool to show how things work in detail. Words can hardly describe what an animation will show in an instant.

By putting your cursor over an image a different image may appear or a small animation will run. Clicking on the animation sign will open full size animations. Some sound effects have been added to create a livelier atmosphere.

In order to view these animations Adobe's Shockwave Player needs to be installed on your computer. So, if you don't see little animations at the top left and bottom of this page go to where you can download this Shockwave Player free of charge.

Many more animations than shown on this website can be viewed by obtaining a disc I created.
This disc contains over 250 animations of electric clock systems.
Please see page 11 for more details
. On the last pages I have placed some simple animated gif's for use in email or website.

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Electricity and Magnetism


Electricity & Magnetism
Electricity & Horology
   A.Electrostatic clocks
   B.The first inventors
   C.Independency of battery
   D.Reliability of contact making
   F.Count-wheel and impulse
   G.The first free pendulum
   H.Shortt's free pendulum
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page 11.