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US 12,181,839 B2Granted
Indicator device for watchmaking
AssigneeLa Vallee S.R.L.
InventorLuciano Sasso
Life of this patent
Estimating the term…
Abstract
An indicator device for watchmaking has a drive toothed wheel which rotates a driven programme wheel is substantially a circular crown with an external toothing and an internal toothing. The latter meshes with an eccentric internal toothed wheel whose cycloidal rotary movement with a suitable transmission ratio allows the information given on the programme wheel to be indicated. The device is suitable for making perpetual calendars of the clocks.
Claims10
An indicator device for watchmaking comprises:
- a toothed drive wheel;
- a programme wheel coupled with the toothed drive wheel, the programme wheel configured as a circular crown comprising an external toothing and an internal toothing;
- and
- an internal toothed wheel engaged cycloidally with the internal toothing of the programme wheel, wherein information shown on the programme wheel is associated with a position of the internal toothed wheel,
- wherein the programme wheel comprises a band of upper teeth, movable between an advanced position in which the band of upper teeth is aligned with respect to the teeth of the external toothing of the programme wheel, and a rearward position in which the band of upper teeth is retracted with respect to said external toothing,
- wherein a planetary gear is configured to act at the band of upper teeth of the programme wheel, for displacing said band of upper teeth between the advanced position in which the band of upper teeth is aligned with respect to teeth of the external toothing of the programme wheel, and the rearward position in which the band of upper teeth are retracted with respect to the external toothing of the programme wheel.
3 more elements
Dependencies are inferred from the claim text.