MARCEL BETRISEY CREATIONS  Sion Switzerland Phone: ++41 273238808 Mobile ++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.