Device comprising a clock movement and a chronograph module
US7905655B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 2004 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Feb 1, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04F7/0895
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device comprises a basic clock movement MB whose time indicators are driven by a first barrel connected to a first wheelwork and a first regulator organ, and an autonomous chronograph module MCA whose indicators are driven by a second barrel independent from the first, connected to a second wheelwork and a second regulator organ. The chronograph module is exclusively composed of mechanical elements. The frequency of oscillation supplied by its regulator is equal N times the frequency of oscillation supplied by the regulator of the base movement, with the coefficient N being definable according to a specific application of the chronograph, so that any chronograph module thus previously defined can work with the same base movement. The chronograph regulator remains constantly engaged with the corresponding wheelwork. The chronograph module allows a time interval to be read with a minimum precision of a hundredth of second. The organs of the base movement and of the chronograph module are arranged in such a way that in assembled state, the height and overall diameter do not exceed 7.75 mm and 30 mm respectively, the dimensions of the chronograph itself being not greater than 4 mm (h…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.