JPS5582084A - Electronic watch with alarm - Google Patents
Electronic watch with alarmInfo
- Publication number
- JPS5582084A JPS5582084A JP15616078A JP15616078A JPS5582084A JP S5582084 A JPS5582084 A JP S5582084A JP 15616078 A JP15616078 A JP 15616078A JP 15616078 A JP15616078 A JP 15616078A JP S5582084 A JPS5582084 A JP S5582084A
- Authority
- JP
- Japan
- Prior art keywords
- alarm
- drive
- coil
- step motor
- pulse
- 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.)
- Pending
Links
Landscapes
- Electromechanical Clocks (AREA)
Abstract
PURPOSE: To constitute small size and simple constitution for the watch with alarm, by commonly using the drive coil of step motor to the booster coil for piezoelectric oscillator driving.
CONSTITUTION: The watch pulse from the drive circut 3 is fed to the drive coil 6 of the step motor and time display is made via the step motor. When alarm time is set provided at the alarm set section 9, the coincidence pulse having broad width is produced from the alarm control circuit 10 delayed with the time drive pulse, the switches 12, 13 are selected and the coincidence pulse is boosted at the coil 6 and fed to the piezoelectric oscillator 19. Accordingly, the buzzer tone is produced from the oscillator via the switching transistor 16 turned on and off with a given frequency signal outputted from the circuit 10, resistor 17 and capacitor 18 to constitute the alarm tone. As a result, the drive coil of the step motor is commonly used as the booster coil for piezoelectric oscillator drive, resulting that the constitution of the electronic watch with alarm is made small and simple.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15616078A JPS5582084A (en) | 1978-12-15 | 1978-12-15 | Electronic watch with alarm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15616078A JPS5582084A (en) | 1978-12-15 | 1978-12-15 | Electronic watch with alarm |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5582084A true JPS5582084A (en) | 1980-06-20 |
Family
ID=15621652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15616078A Pending JPS5582084A (en) | 1978-12-15 | 1978-12-15 | Electronic watch with alarm |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5582084A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4362399A (en) * | 1979-10-12 | 1982-12-07 | U.S. Philips Corporation | Circuit for an electronic clock having a parallel-connected alarm device and stepper motor |
-
1978
- 1978-12-15 JP JP15616078A patent/JPS5582084A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4362399A (en) * | 1979-10-12 | 1982-12-07 | U.S. Philips Corporation | Circuit for an electronic clock having a parallel-connected alarm device and stepper motor |
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