Cannon pinion with driver wheel (Mobile de chaussée)

The cannon pinion with driver wheel (mobile de chaussée) is a component part of the time indication mechanism of the mechanical clockwork. This mechanism permits the exact indication of the time. The drive is effected by the pinion (pignon de moyenne) of the third wheel (mobile de moyenne) and consists of the following elements: Cannon pinion with driver wheel (mobile de chaussée), minute wheel (mobile de minute) and hour wheel (roue des heures).