Astronomical wrist-watch
US4711583A · kind A · utility
24Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1986 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Nov 5, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B13/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.