JPS56107187A - Electronic watch with alarm indication - Google Patents

Electronic watch with alarm indication

Info

Publication number
JPS56107187A
JPS56107187A JP1045780A JP1045780A JPS56107187A JP S56107187 A JPS56107187 A JP S56107187A JP 1045780 A JP1045780 A JP 1045780A JP 1045780 A JP1045780 A JP 1045780A JP S56107187 A JPS56107187 A JP S56107187A
Authority
JP
Japan
Prior art keywords
circuit
overload
load
generated
frequency
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
JP1045780A
Other languages
Japanese (ja)
Inventor
Keizo Nakamura
Fumio Sugano
Shingo Ichikawa
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch 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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP1045780A priority Critical patent/JPS56107187A/en
Publication of JPS56107187A publication Critical patent/JPS56107187A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

PURPOSE:To make possible prevention of unnecessary electric power consumption due to overload by detecting a load level for a step motor to control a driving force and alarming an overload. CONSTITUTION:A drop in the drive signal level which is output by a step motor drive circuit 4 complying to a load is detected by means of a load level detection circuit 6 and as a result, a terminal A on a driving waveform shaping circuit 3 is inverted to a high level, opening AND gates 33, 32, a frequency-dividing output from FF9 is generated at a period of one second frequency dividing output generated by FF15 and a drive pulse is generated by an alternate pulse generation circuit 41 at time of a light load such as when an ordinary time is indicated. In the same manner, if an intermediate load such as when a calendar is indicated is controlled to result in an overload, a terminal C on the circuit 3 is inverted to a high level through the intermediary of the circuit 6 and a drive pulse generated from the circuit 41 generates two times in succession a frequency-dividing output from FF10 at a period of two-second frequency dividing output from FF16. Consequently, the second watch needle inches two steps every two seconds to alarm an overload, thus preventing unnecessary electric power consumption.
JP1045780A 1980-01-31 1980-01-31 Electronic watch with alarm indication Pending JPS56107187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1045780A JPS56107187A (en) 1980-01-31 1980-01-31 Electronic watch with alarm indication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1045780A JPS56107187A (en) 1980-01-31 1980-01-31 Electronic watch with alarm indication

Publications (1)

Publication Number Publication Date
JPS56107187A true JPS56107187A (en) 1981-08-25

Family

ID=11750664

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1045780A Pending JPS56107187A (en) 1980-01-31 1980-01-31 Electronic watch with alarm indication

Country Status (1)

Country Link
JP (1) JPS56107187A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883292A (en) * 1981-11-12 1983-05-19 Shiojiri Kogyo Kk Electronic wrist watch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883292A (en) * 1981-11-12 1983-05-19 Shiojiri Kogyo Kk Electronic wrist watch

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