The Princes Risborough Clock
The Self Winder
Adapted and re-assembled by Mr Bob Dennis in the Spring of 1999.
| The parts of an electric self winder for the clock have been acquired from Cumnor Church and Bob Dennis has fabricated a frame for it to work with the Risborough Clock. |
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It works on the principle known as Huyghens' Endless Chain. A weight suspended from a loop of chain descends as the drum of the clock unwinds.
Near the end of its travel, the weight triggers a switch which starts an electric motor that winds the weight and the clock up. The weight is raised until it reaches a second switch which turns the motor off. The Self Winder is now in storage, with the clock, in the church tower. |
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