JPS5547477A - Count-back watch - Google Patents

Count-back watch

Info

Publication number
JPS5547477A
JPS5547477A JP11635778A JP11635778A JPS5547477A JP S5547477 A JPS5547477 A JP S5547477A JP 11635778 A JP11635778 A JP 11635778A JP 11635778 A JP11635778 A JP 11635778A JP S5547477 A JPS5547477 A JP S5547477A
Authority
JP
Japan
Prior art keywords
time
signal
count
display
energizes
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
JP11635778A
Other languages
Japanese (ja)
Inventor
Hideki Naito
Toyotoshi Tanaka
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.)
Jeco Corp
Original Assignee
Jeco Corp
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 Jeco Corp filed Critical Jeco Corp
Priority to JP11635778A priority Critical patent/JPS5547477A/en
Publication of JPS5547477A publication Critical patent/JPS5547477A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Predetermined Time Intervals (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Abstract

PURPOSE: To enable display of residual time and excess time on a count-back watch by using a reversible counter at a time counter.
CONSTITUTION: The output signal from an oscillator 9 is supplied through a start switch 10 to a frequency divider 11. This signal is applied via a selector 12 to reversible counters 13W15 as count-back signal to subtract it from the set time by a preset circuit 16 to permit a display unit 1 to display the residual time. When the residual time becomes, for example, ten minutes, a time limit display circuit 18 energizes a blue lamp 2, and when it becomes less than 5 minutes, it energizes a yellow lamp 3. When counting operation os advanced to allow all the counters 13W15 to become all zero, a red lamp 4 is energized and a signal is produced from a discriminator 19 to thereby set the selector 12 to addition counting so as to measure the elapsed time.
COPYRIGHT: (C)1980,JPO&Japio
JP11635778A 1978-09-21 1978-09-21 Count-back watch Pending JPS5547477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11635778A JPS5547477A (en) 1978-09-21 1978-09-21 Count-back watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11635778A JPS5547477A (en) 1978-09-21 1978-09-21 Count-back watch

Publications (1)

Publication Number Publication Date
JPS5547477A true JPS5547477A (en) 1980-04-03

Family

ID=14684951

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11635778A Pending JPS5547477A (en) 1978-09-21 1978-09-21 Count-back watch

Country Status (1)

Country Link
JP (1) JPS5547477A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62172290A (en) * 1986-01-27 1987-07-29 Koji Takamura Label timer for displaying effective period
JPS6346793A (en) * 1986-08-14 1988-02-27 三菱樹脂株式会社 Manufacture of printed wiring board

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS452771Y1 (en) * 1965-01-19 1970-02-05
JPS4963481A (en) * 1972-10-17 1974-06-19

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS452771Y1 (en) * 1965-01-19 1970-02-05
JPS4963481A (en) * 1972-10-17 1974-06-19

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62172290A (en) * 1986-01-27 1987-07-29 Koji Takamura Label timer for displaying effective period
JPS6346793A (en) * 1986-08-14 1988-02-27 三菱樹脂株式会社 Manufacture of printed wiring board

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