Patent ID: 11921462
Assignee: ROLEX SA
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A timepiece calendar device including:
a first disk for displaying dates, the first disk having a first face bearing date indications and being mobile about an axis, and
a second disk for displaying days of the week, the second disk having a second face bearing day indications and being mobile about the axis,
the first and second disks being arranged so that the first and second faces are coplanar, the second face being disposed around the first face,
the timepiece calendar device further including a calendar driver mobile including a first finger for driving a first set of teeth of the first disk, and a second finger for driving a second set of teeth of the second disk,
wherein the second set of teeth is an interior set of teeth and the first set of teeth is an interior set of teeth, the second set of teeth having a tip diameter d2 greater than the tip diameter d1 of the first set of teeth,
wherein d2>1.1×d1.