Horology: time measuring systems or devices – Chronological – With mechanical or electromechanical driven display
Patent
1997-11-05
1999-12-07
Miska, Vit
Horology: time measuring systems or devices
Chronological
With mechanical or electromechanical driven display
368220, G04B 1904, G04B 1902
Patent
active
059994959
ABSTRACT:
A timepiece movement comprises a first luminous element for emitting light, a second luminous element for emitting light, and a light-receiving element for receiving the light emitted by the first and second luminous elements. A second wheel has an aperture through which light from the first luminous element may pass and a reflecting portion. A first transmitting wheel transmits a rotational drive to the second wheel as a function of second time and has an aperture through which light from the first luminous element may pass and which is positioned to become aligned with the aperture of the second wheel. A rotational minute wheel has apertures disposed at equal angular intervals and through which light from the second luminous element may pass. A rotational hour wheel has apertures through which light from the second luminous element may pass. Each of the apertures of the hour wheel are positioned to become aligned with respective ones of the apertures of the minute wheel during rotation of the minute and hour wheels. A second transmitting wheel transmits a rotational drive to the minute wheel and the hour wheel as a function of minute time and hour time, respectively. The second transmitting wheel has a plurality of apertures disposed at equal angular intervals and through which light from the second luminous element may pass. The apertures of the minute wheel are positioned to become aligned with respective ones of the apertures of the second transmitting wheel during rotation thereof.
REFERENCES:
patent: 4253173 (1981-02-01), Jaunin
patent: 4645357 (1987-02-01), Allgaier et al.
patent: 5231612 (1993-07-01), Allgaier et al.
patent: 5566140 (1996-10-01), Kohata et al.
WPIL, Abstract Accession No. 90-068104/10 and DE 3828810 A, Kienzle et al., Mar. 1, 1990.
Baba Koji
Hashizume Hiroyuki
Miska Vit
Seiko Clock Inc.
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