MARCEL BETRISEY CREATIONS Sion Switzerland Phone: ++41 793801679 Email: see "Contact"
APRILIA (Ball clock)
Ball clock built with motor-bike and bicycle parts and a frying pan.
The chassis is an Aprilia road bike front fork, the dial and the bob use Harley-Davidson brake disks and the ball elevator system is made of bent and soldered motor-bike spokes.
The pendulum's engine uses the principle invented for Florence and Cyclostyle: a bearing ball falls every hour, pushes on the
pendulum three times i the direction of oscillation, giving it enough energy for a full hour.
This clock started working in march 2000. It reaches an accuracy of a few seconds per month.