THE TRINITY CLOCK

 

 
 

Monitoring Project - Introduction

The pendulum clock in Trinity College, Cambridge was installed in 1910. It is remarkably accurate, known to be better than one second per month. In 2009 a system was installed to monitor the "going". The work was done as part of a 4th year MEng project at the Engineering Department. A sensor on the pendulum detects the going of the clock, which is compared to the accurate time signal from a GPS receiver. For an entirely mechanical clock the accuracy is remarkable. Watch the clock strike twelve or hear it strike twelve at Singing from the Towers . Follow @clockkeeper on twitter. Today's and yesterday's weather in Cambridge, including wind. Here is a graph for the last 30 days of drift

A barometric compensator was installed at clock change - midnight 28 March 2010.
The clock is regulated as infrequently as possible so as to stay within +/- 5 seconds of the correct time. This enables the steady-state physics of the clock to be examined without unnecessary interference. The black dots • indicate that there is a comment relating to the time indicated. Blue arrows pointing down indicate that an adjustment was made to the Going of the clock by removing weights from the pendulum. Red arrows up indicate addition of weights to speed the clock up.

date [time GMT]Clock Diary