Title:
TIMEPIECE WITH ELECTROMECHANICAL ANALOGUE INDICATOR AND ELECTRONIC DIGITAL INDICATOR
Document Type and Number:
Japanese Patent JPS54151475
Kind Code:
A
Abstract:
In a timepiece having an electro- mechanical analogue display (hour and minute hands driven by a step motor) and also an electronic digital display for giving other information, a signal generator (LED 6) and a detector (photocell 7) are so arranged in relation to an element (wheel 5) coupled to the analogue display as to produce periodic signals for synchronizing the digital to the analogue display. As described the wheel 5 is turned by hour wheel 3 and its aperture 8 causes a signal to be generated at midnight. The signal is used to ensure that a digital date display is synchronized with the hands, especially after replacing the timepiece battery. Use in an alarm timepiece is also envisaged.
Inventors:
JIYANNPIEERU JIYONAN
Application Number:
JP3571579A
Publication Date:
November 28, 1979
Filing Date:
March 28, 1979
Export Citation:
Assignee:
SUISSE HORLOGERIE
International Classes:
G04C3/00; G04B19/24; G04G9/00; (IPC1-7): G04C3/00
Domestic Patent References:
| JPS50147772A | 1975-11-27 |