Automatic winding device for a watch movement
US3999371A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Dec 15, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B5/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An automatic winding device for a watch movement includes two frame elements secured to one another to form a unit. The elements support between them a gear train, a pinion, a winding weight integral with the pinion, a lever, a wheel borne by the lever and meshing with the pinion, and a click cooperating with a gear of the gear train. A hairpin strip-spring has one end which acts on the click and another end which acts on the lever. One of the frame elements comprises an elongated recess and the other of the frame elements comprises a notch having edges partially covering the recess. The hairpin strip-spring is inserted in the recess through the notch. The lever and the click are not subjected to the action of the hairpin strip-spring assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.