Intermittent driving arrangement for a time indicator
AssigneeETA SA Fabriques d'Ebauches
InventorCyril Vuilleumier
Life of this patent
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Abstract
A time indicator for a timepiece is driven by an arrangement comprising a driving train and a transmission assembly. The driving train includes a finger adapted to drive a pinion of small diameter and a circular flange adapted to block a pinion of large diameter. The small and large diameter pinions are coaxial, fixed to one another and compose the transmission assembly. In this manner the time interval in passing from one indication to another is diminished while avoiding the butting phenomenon of teeth resting on the circular flange.
Claims5
Intermittent driving arrangement for a time indicator in a timepiece including a driving train driven in continuous rotation by the timepiece movement and a transmission assembly driven in discontinuous rotation by said driving train, said assembly driving in turn said indicator, the transmission assembly including first and second coaxial pinions fixed to one another and having the same number of teeth, the diameter of the first pinion being less than the diameter of the second, the driving train including first driving means to set said first pinion into intermittent motion and blocking means to block said second pinion during intervals when said transmission assembly is not driven.
Dependencies are inferred from the claim text.