Correction device for timepiece display mechanism and wheel fitted thereto
US7957226B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2008 |
| Grant date | Jun 7, 2011 |
| Priority date | — |
| Expiry date | Oct 29, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1987
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A correction device for a timepiece display mechanism, which includes a display member fitted with a toothing of pitch P, includes a pinion provided with a toothing of pitch p, mounted on a winding stem so as to occupy at least one display correcting position A, and a correction wheel mounted between the pinion and the display member. The correction wheel includes a first toothing defined by pitch P, a head diameter D, and a foot diameter d1, formed of teeth including a tip extending substantially angularly, and the tip is cut so as to form a second discontinuous toothing that is coplanar and concentric to the first toothing, defined by pitch p less than the pitch P of the first toothing, a head diameter D equal to the head diameter of the first toothing, and a foot diameter d2 greater than the foot diameter d1 of the first toothing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.