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Chrono escapement


The English watchmaker Thomas Earnshaw who was born on the 4th February 1749, was one of those who made a substantial contribution to the evolution of the marine chronometer.

Earnshaw further developed a simpler and more accurate escapement mechanism that had been invented by another English watchmaker, John Arnold (1736 – 1799). The Arnold/Earnshaw chronometers were considerably simpler than Harrison’s but were consistently accurate and mechanically reliable.


This is the Chrono Recoil that is the heart of the ticker.  The wheel ot the upper right rotates back and forth allowing the escape to move one tooth at a time

This is my construction of the movement.  The large wheel on the right is lightly weighted to make the escape work.

The finished product is simply a kenetic sculpture and runs for two minutes - which is enough.


http://www.youtube.com/watch?v=051nVXsNhJ8