Moon phase display device, particularly for a timepiece

Details Moon phase display device, particularly for a timepiece Moon phase display device, particularly for a timepiece

2005-04-26

2005-04-26

Miska, Vit W. (Department: 2841)

Horology: time measuring systems or devices

Astronomical

With sun, earth, and moon display

C368S018000, C434S284000

Reexamination Certificate

active

06885614

ABSTRACT:
The device includes an indicator (3) in the shape of a plate, moving behind a dial (1) having a circular aperture (2), which represents the lunar disc. The indicator includes an S-shaped line of separation (6) between a dark zone (4) and a light zone (5) representing the non-illuminated part and the illuminated part of the moon in the aperture. The indicator is rotatably mounted at the centre of symmetry C of the line of separation (6) on a rotating support making two revolutions per lunation. An image matching the appearance of the moon in each phase is thus obtained. Such a device can be used particularly in a watch or another timepiece.

REFERENCES:
patent: 508467 (1893-11-01), Clark
patent: 1997511 (1935-04-01), Canepa
patent: 4853908 (1989-08-01), Bourquin et al.
patent: 5023849 (1991-06-01), Vaucher
patent: 5086416 (1992-02-01), Dubois et al.
patent: 6507536 (2003-01-01), Keatch
patent: 0869411 (1998-10-01), None
patent: 1103872 (2001-05-01), None
Glaser, G., “Astronomische Indikationen Bei Uhren,” Jahrbuch der Deutschen Gesellschaft fur Chronometrie, Deutschen Gesellschaft fur Chronometrie E.V. Stuttgard, DE, vol. 40, 1989, pp. 139-161.
European Search Report for EP 03010126, in English, completed at the Hague on Feb. 19, 2004, by U. Exelmans.
European Search Report for EP 03010126, in French, completed at La Haye, on Fevrier 19, 2004, by U. Exelmans.

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