JPS54145168A - Watch apparatus - Google Patents

Watch apparatus

Info

Publication number
JPS54145168A
JPS54145168A JP5227278A JP5227278A JPS54145168A JP S54145168 A JPS54145168 A JP S54145168A JP 5227278 A JP5227278 A JP 5227278A JP 5227278 A JP5227278 A JP 5227278A JP S54145168 A JPS54145168 A JP S54145168A
Authority
JP
Japan
Prior art keywords
stop
wheel train
train mechanism
counter
hands
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
Application number
JP5227278A
Other languages
Japanese (ja)
Inventor
Hitoshi Tsutsui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Casio Computer Co Ltd
Original Assignee
Casio Computer Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP5227278A priority Critical patent/JPS54145168A/en
Publication of JPS54145168A publication Critical patent/JPS54145168A/en
Pending legal-status Critical Current

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  • Electromechanical Clocks (AREA)

Abstract

PURPOSE: To prevent the read miss of the time such as of a hand type wristwatch by detecting and announcing the driving stop of the wheel train mechanism which operates the hands according to the revolutions of a step motor.
CONSTITUTION: While a wheel train mechanism 5 is normally operating, the signal is applied as a reset signal to the counter 7a of a driving stop detecting circuit 7 at a rate of once a minute from the wheel train mechanism 5 and therefore, no carry signal is outputted from a counter 7a, hence a light emitting diode 6a is not lighted. When the drop of the voltage of a supply battery causes the step motor to stop or the the stop of driving of the wheel train mechanism 5 owing to its trouble causes the hands to stop operating, the carry signal is generated from the counter 7a and therefore an FF 7b is set and the light emitting diode 6a of the display part emits light. Thereupon, the user knows that the hands are not moving, thus an error in reading the current time does not occur.
COPYRIGHT: (C)1979,JPO&Japio
JP5227278A 1978-05-02 1978-05-02 Watch apparatus Pending JPS54145168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5227278A JPS54145168A (en) 1978-05-02 1978-05-02 Watch apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5227278A JPS54145168A (en) 1978-05-02 1978-05-02 Watch apparatus

Publications (1)

Publication Number Publication Date
JPS54145168A true JPS54145168A (en) 1979-11-13

Family

ID=12910134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5227278A Pending JPS54145168A (en) 1978-05-02 1978-05-02 Watch apparatus

Country Status (1)

Country Link
JP (1) JPS54145168A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57125873A (en) * 1981-01-30 1982-08-05 Seikosha Co Ltd Timer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57125873A (en) * 1981-01-30 1982-08-05 Seikosha Co Ltd Timer

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