Patent · US Active

Timepiece mechanism for returning the seconds hand to zero with a snail cam

US11163266B2 · kind B2 · utility

0Cited by

6References

10Claims

0Family size

Assignee

Montres Breguet S.A. · CH

Inventors

Jerome Mace · Le Pont, CH
Sebastian Alagon Carrillo · Yverdon-les-Bains, CH
Alain Zaugg · Le Brassus, CH

Key dates

Filing date	Nov 1, 2018
Grant date	Nov 2, 2021
Priority date	—
Expiry date	May 27, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG04F7/0809
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A timepiece mechanism for returning the seconds hand to zero, which includes a seconds arbor; a seconds hand; a cam forming a snail cam path which extends in a spiral around the seconds arbor from an inner end to an outer end connected to each other by a radial stop surface; a hammer carrying a cam follower, rotatably mounted about a hammer axis between a disengaged position wherein the cam follower is removed from the cam path and an engaged position wherein the cam follower presses on the cam path; a retaining ratchet system including a toothed wheel and a click which engages with the toothed wheel.

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