Intermediate or center wheel (Mobile intermédiaire / Mobile de grande moyenne)

The intermediate or center wheel (mobile intermédiaire / mobile de grande moyenne) is a component part of the gear train which ensures energy transmission in the mechanical clockwork between barrel (barillet) and balance. The gear train ensuring energy transmission between barrel and balance consists of the third wheel (mobile de moyenne), the intermediate or center wheel (mobile intermédiaire / mobile de grande moyenne), the fourth wheel (mobile de seconde) and the escape wheel (mobile d’échappement).