Patent ID: 7490977
Filing Date: 2009-02-17
Classification: G04B

Abstract:
1. A timepiece including a movement fitted with a power reserve indicator device, said timepiece including a barrel closed by a cover, a mainspring housed in the barrel and respectively connected to a barrel arbour and to said barrel, a going train driven by said barrel and means for winding said mainspring, said indicator device including a differential gear kinematically connected by a first input to the barrel arbour, by a second input to the barrel and by a first output to a power reserve indicator member and wherein a differential gear frame is arranged coaxially to the barrel arbour, wherein a second output of the differential gear is secured to the barrel cover, wherein the first differential gear output is formed by an inner toothed crown, wherein the inner toothed crown is kinematically connected to the first input by at least first and second planetary wheel sets meshed with each other and in that said at least two planetary wheel sets are carried by the cover.