Patent · US Active

Annual or perpetual calendar mechanism and timepiece comprising the same

US9703262B2 · kind B2 · utility

1Cited by

6References

9Claims

0Family size

Assignee

Sociéte anonyme de la manufacture d'horlogerie Audemars Piquet & Cie · CH

Inventor

Giulio Papi · La Chaux-de-Fonds, CH

Key dates

Filing date	Nov 23, 2015
Grant date	Jul 11, 2017
Priority date	—
Expiry date	Nov 23, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG04B19/2538
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In an annual or perpetual calendar mechanism, a day-of-the-month wheel includes a notch. At each actuation of a lever, a first pawl finger effects an actuation of one step, on one of the teeth of the day-of-the-month wheel. Upon actuation of the lever at the end of a month of fewer than 31 days, a second pawl finger effects, in the notch, an actuation of the day-of-the-month wheel by a whole number of steps. The notch is positioned between two consecutive teeth among the teeth of the day-of-the-month wheel. The day-of-the-month wheel has a peripheral edge which forms the profiles of its teeth as well as the notch.

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