Electro-mechanic calendar timepiece
US4136514A · kind A · utility
2Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 13, 1977 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | May 13, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B19/25386
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electro-mechanic calendar timepiece includes a braking device for generating torque to prevent drifting or floating of the movement gearing when the intermittent calendar driving mechanism is not rotating. When the calendar driving mechanism is rotating the braking device is not operating and the calendar driving mechanism cooperates with a lever arm and spring to generate torque to prevent the floating of the movement gearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.