JPS54118872A - Electronic watch - Google Patents
Electronic watchInfo
- Publication number
- JPS54118872A JPS54118872A JP2567778A JP2567778A JPS54118872A JP S54118872 A JPS54118872 A JP S54118872A JP 2567778 A JP2567778 A JP 2567778A JP 2567778 A JP2567778 A JP 2567778A JP S54118872 A JPS54118872 A JP S54118872A
- Authority
- JP
- Japan
- Prior art keywords
- time
- alarm
- frequency dividing
- dividing circuit
- photoelectric transducers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Electromechanical Clocks (AREA)
Abstract
PURPOSE: To achieve the improvement of operating characteristic and alarm time accuracy by providing plural photoelectric transducers and producing alarm sound from the state change of the photoelectromotive force thereof.
CONSTITUTION: Photoelectric transducers 401, 402 are provided to constitute a hand position detecting means 205, which is then connected to a frequency dividing circuit 206. Then, the output of an oscillator 201 is inputted via frequency dividing circuit 202 to a step motor 203, by which a wheel train 204 is driven. It is also inputted to a frequency dividing circuit 206, whose contents is then compared with the time of a setting circuit 208 in a comparator 207, and at the time when an alarm generating circuit 209 is triggered at the alarm set time, the position of the wheel train 204 is detected by the hand position detecting means 205 and the frequency divider 206 is set and reset. whereby synchronization is taken. The use of a plurality of photoelectric transducers 401, 402 improves the position detection accuracy.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2567778A JPS54118872A (en) | 1978-03-07 | 1978-03-07 | Electronic watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2567778A JPS54118872A (en) | 1978-03-07 | 1978-03-07 | Electronic watch |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54118872A true JPS54118872A (en) | 1979-09-14 |
JPS6117317B2 JPS6117317B2 (en) | 1986-05-07 |
Family
ID=12172411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2567778A Granted JPS54118872A (en) | 1978-03-07 | 1978-03-07 | Electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54118872A (en) |
-
1978
- 1978-03-07 JP JP2567778A patent/JPS54118872A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6117317B2 (en) | 1986-05-07 |
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