JPS57199984A - Time limiting device - Google Patents

Time limiting device

Info

Publication number
JPS57199984A
JPS57199984A JP8537581A JP8537581A JPS57199984A JP S57199984 A JPS57199984 A JP S57199984A JP 8537581 A JP8537581 A JP 8537581A JP 8537581 A JP8537581 A JP 8537581A JP S57199984 A JPS57199984 A JP S57199984A
Authority
JP
Japan
Prior art keywords
time
setting switch
operated
counter
display
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
JP8537581A
Other languages
Japanese (ja)
Inventor
Takayasu Narita
Hiroyuki Ota
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8537581A priority Critical patent/JPS57199984A/en
Publication of JPS57199984A publication Critical patent/JPS57199984A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G15/00—Time-pieces comprising means to be operated at preselected times or after preselected time intervals

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)

Abstract

PURPOSE:To prevent time from varying even if a time setting switch is touched carelessly, by providing a resetting circuit which operates on the ending of the operation of the time setting switch and stores an unadjustable state in a display kind storage circuit a certain time later. CONSTITUTION:To adjust the time display on a display device 34 to current time, a timer setting switch 7 is operated and a display kind storage circuit 18 is placed in a timer display state temporarily. At this time, a second counter 25 is cleared to (0). Then, a minute setting switch 10 is operated to supply a clock pulse P6 to a minute counter 24, whose value is set, and an hour setting switch 9 is operated to supply a clock pulse P6 to a hour counter 23. At this time, a subtracting counter 12 is preset to, for example, (5) during the setting of minute and second data, then performs subtracting operation after the time setting; when its value reaches (0), information showing an invariably timer display state is stored in the storage circuit 18 and at the same time, AND circuts 26 and 28 are closed to prevent the time from varying even if the switches 9 and 10 are operated carelessly.
JP8537581A 1981-06-02 1981-06-02 Time limiting device Pending JPS57199984A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8537581A JPS57199984A (en) 1981-06-02 1981-06-02 Time limiting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8537581A JPS57199984A (en) 1981-06-02 1981-06-02 Time limiting device

Publications (1)

Publication Number Publication Date
JPS57199984A true JPS57199984A (en) 1982-12-08

Family

ID=13856967

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8537581A Pending JPS57199984A (en) 1981-06-02 1981-06-02 Time limiting device

Country Status (1)

Country Link
JP (1) JPS57199984A (en)

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