The main Movement


Uhrwerk

Between 1527 and 1530 Casper Brunner built the monumental and artistic mechanisms, which controls the whole installation: the astronomical dial, both the large dials on the East and West façades, the hourly chime and the automata. We dare say that it is one of the greatest clock mechanisms ever built and it has basically sur-vived until the present day.
 
The clock frame consists of a wrought-iron, late Gothic supported construction, measuring 2.50 m in length, 1.70 m in depth and approx. 2.20 m in height. The whole mechanism contains 5 different gears: The main train with a pendulum (originally foliot), the quarter chime, the hour chime and two automata gears.

The five gears are driven by stone weights with a power reserve of about 28 hours. Therefore the weights with a total weightiness of 450 kg have to be pulled up every day.