Annual date mechanism for clock movement
US6744696B2 · kind B2 · utility
16Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2003 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Feb 6, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/2536
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This annual date mechanism comprises a correction cam (1a) in kinematic connection with a date indicating runner (1), a correction rocker (8) engaged on the one hand with said correction cam (1a) and, on the other hand, with an annual cam (18). A spring (9) presses the correction rocker (8) against the cams (1a, 18). The correction cam (1a) comprises a portion (1a′) for arming said spring (9), followed by a portion (1a*) sized to cause said date runner (1) to move by one step between “31” and “1”, under the pressure of said spring (9).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.