Patent · US Active

Timepiece comprising a day/night display that takes account of seasonal variations

US10775744B2 · kind B2 · utility

0Cited by

3References

17Claims

0Family size

Assignee

The Swatch Group Research and Development Ltd · CH

Inventors

Beat Gilomen · Grenchen, CH
Dominique Lechot · Les Reussilles, CH

Key dates

Filing date	Dec 8, 2017
Grant date	Sep 15, 2020
Priority date	—
Expiry date	Dec 8, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG04B19/226
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A timepiece includes a timepiece movement, a calendar mechanism and a mechanism for indicating the sunrise and sunset that take account of seasonal variations. The calendar mechanism includes a date display and a month display. The sunrise and sunset indicating mechanism also includes an annual cam having a profile representative of the tilt of the sun with respect to the equatorial plane and arranged to be driven in rotation by the date wheel set via a third kinematic chain.

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