Timepiece
US4060977A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1976 |
| Grant date | Dec 6, 1977 |
| Priority date | — |
| Expiry date | Apr 22, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/25
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A date correcting mechanism for a watch or other timepiece having a crown-ring indicator for the date, in which the indicator is moved once a day by a rotatable driving disc which carries pins meshing with slots in the crown-ring. The correcting mechanism includes means for connecting the watch stem to the driving disc for manually setting the crown-ring indicator. A cam-plate which is driven by the watch movement is mounted for movement out of its operative position in which it cooperates with the pins on the driving disc to rotate the disc step-by-step and also to prevent it from rotating between steps in order to avoid inadvertent movement of the indicator. By mounting the cam-plate in this manner, it can be moved to an inoperative position, so that the pins on the driving disc can pass when the driving disc is actuated by the watch stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.