Astronomical wrist-watch
AssigneeUlysse Nardin S.A.
InventorsLudwig Oechslin, Urs Giger, Jorg Sporing
Life of this patent
Estimating the term…
Abstract
A watch designed to display, by means of indicators (7 to 10) several astronomical magnitudes. The indicators are driven by means of a planetary gear train (19) which is rotatingly supported by means of a ball bearing (20) within a support ring (11) of the watch. The drive force as well as the time reference are provided by a work (C) simultaneously driving the planet-wheel carrier (21, 22) of the planetary gear train and the gear clusters mounted thereon. Each of said clusters has a reduction ratio depending on the indicator (8 to 10) it is intended to drive.
Claims15
An astronomical watch comprising an epicyclic train of gearing and a temporal reference means having a mechanical output which is coupled, via said epicyclic train of gearing, to at least one astronomical magnitude indicator, said epicyclic train of gearing including gear means for each astronomical magnitude indicator, a ring gear, a driving central wheel, and a rotatable planetary wheel carrier, the ring gear and the driving central wheel of said train of gearing being coupled to said temporal reference while said planetary wheel carrier is connected to a local time indicator, and said gear means comprising multiple rotary components that are mounted on the planetary wheel carrier of the train and that have a predetermined reduction ratio.
Dependencies are inferred from the claim text.