Patent · US Expired

Chronograph coupling mechanism

US7021818B2 · kind B2 · utility

0Cited by

3References

7Claims

0Family size

Assignee

ETA SA MANUFACTURE HORLOGÈRE SUISSE · CH

Inventors

Pierre Haefeli · Saules, CH
Alphonse Bron · Delémont, CH

Key dates

Filing date	Oct 6, 2003
Grant date	Apr 4, 2006
Priority date	—
Expiry date	Sep 1, 2024

Classification

Technology area (CPC G)Physics
CPC primaryG04F7/08
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The coupling wheel (17) is brought into friction with an intermediate second wheel (19), or, conversely, to moved away therefrom by a fork (16) formed in the large arm (22) of an L-shaped coupling spring (20), articulated at the joining portion of the two arms (22, 24) on an adjustment plate (30), the small arm (24) of said coupling spring (20) having its end stressed by the end of a control lever (10). Means for guiding (32a, 32b) and positioning by a cam screw (38) allow the distance between the small arm (24) of the coupling spring (20) and the end of the control lever (10) to be modified, which thus allows manufacturing tolerances to be compensated for.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.