Title:
季節変動を考慮した昼夜表示を備えた時計
Document Type and Number:
Japanese Patent JP6473799
Kind Code:
B2
Abstract:
A timepiece movement, a calendar mechanism and device for indicating the sunrise and sunset that takes account of seasonal variations. The simple calendar mechanism includes a display mechanism for displaying the date and a display mechanism for displaying the month. The sunrise and sunset indicating device 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 via the hour wheel set through a kinematic chain that passes through the month display device and has a transmission ratio of 1:744.
More Like This:
| JPS5393931 | CALENDER WITH MOVABLE PICTURE |
| JP2021139632 | ELECTRONIC WATCH CONTROL METHOD AND ELECTRONIC WATCH |
Inventors:
Beato Giroman
Dominique Reshaw
Dominique Reshaw
Application Number:
JP2017237458A
Publication Date:
February 20, 2019
Filing Date:
December 12, 2017
Export Citation:
Assignee:
The Swatch Group Research and Development Limited
International Classes:
G04B19/00; G04B19/22
Domestic Patent References:
| JP2016075685A |
Foreign References:
| US3305946 | ||||
| US4102121 | ||||
| US7012855 | ||||
| US2023677 |
Attorney, Agent or Firm:
Shigeki Yamakawa
Masaki Yamakawa
Masaki Yamakawa