发明名称 |
Automatic initialisation method for at least the date display, a device for performing this method and a watch equipped with said device |
摘要 |
The device for implementing the method for the automatic initialisation of the date display of a perpetual calendar electronic watch comprising a face fitted with a window and a date disk permits, every time the watch stops, at the moment the electronic circuit is reconnected, the automatic identification of the date appearing in the window, by optically analysing a code attributed to this date and by memorizing this data by means of the electronic circuit. This optical device (10) comprises a source (11) emitting a beam of light (12), reflective surfaces (13) fixed onto the date disk (15) and a receiver (14). The beam (16) reflected by a surface (13) is intercepted by the receiver (14) which supplies a signal to the electronic circuit (17) which controls an electronic motor (18) driving the disk (15) by a system of reduction gears (19, 20).
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申请公布号 |
US5305289(A) |
申请公布日期 |
1994.04.19 |
申请号 |
US19900605550 |
申请日期 |
1990.10.30 |
申请人 |
MONTRES ROLEX S.A. |
发明人 |
BESSON, RENE;LEUENBERGER, CLAUDE-ERIC |
分类号 |
G04C3/14;G04C3/00;G04C17/00;(IPC1-7):G04B19/24 |
主分类号 |
G04C3/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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