Calendar ring driving wheel for timepieces
AssigneeETA A.G. Ebauches-Fabrik
InventorEdwin Jakob
Life of this patent
Estimating the term…
Abstract
A timepiece having a toothed calendar ring and a driving wheel for advancing the calendar ring, wherein the driving wheel comprises a hub and a completely closed toothed rim having a driving tooth. The rim is connected to the hub by a resilient member so that the driving tooth makes way for a tooth of the calendar ring when the calendar ring is driven by means other than the driving wheel.
Claims7
A driving wheel for advancing a toothed calendar ring of a timepiece, comprising a hub and a toothed rim having a driving tooth projecting radially beyond said rim for engaging the toothing of said calendar ring, further comprising means for connecting said hub to said rim in such a way that said rim and said hub are concentric upon advancement of said calendar ring by said driving tooth and that said rim together with said driving tooth is displaced relative to said hub upon advancement of said calendar ring by means other than said driving tooth, said rim constantly retaining the same geometric shape.
Dependencies are inferred from the claim text.