Constant-force device for indirect-second watches
US6997602B2 · kind B2 · utility
7Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2003 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Mar 15, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04F7/0866
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention refers to a constant-force device suitable for being integrated into a movement of watches, particularly wrist watches, with an indirect-second mechanism having an intermediate second pinion (14) driven by a second wheel (9) of the movement, and an indirect-second wheel (15). The constant-force device comprises a tensioning module (4, 5, 6, 7, 8), a cam (2), a lever (11), and a stop wheel (13). The stop wheel (13) of the constant-force device is mounted on the intermediate second pinion (14) of the indirect-second mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.