Setting device for a minute hand of a timepiece, in particular of a chronograph
US9651919B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2013 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Feb 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04F7/0804
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A minute hand of a timepiece has a central arbor, on which, for driving around the same: a gearwheel is fixed in a first accommodating region, a flyback device is fixed in a second accommodating region, and a snail cam is arranged with an interference fit in a third accommodating region. The snail cam has an opening for accommodating the head of an eccentric and the flyback device has an opening for accommodating the finger of the eccentric, and therefore rotation of the eccentric head, via the flyback device fixed on the central arbor, makes it possible to rotate the snail cam by an angle about the central arbor relative to the gearwheel for setting the triggering point of the advancement operation by the minute control level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.