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JPS5582082A - Correction watch for time forecast - Google Patents

Correction watch for time forecast

Info

Publication number
JPS5582082A
JPS5582082A JP15701378A JP15701378A JPS5582082A JP S5582082 A JPS5582082 A JP S5582082A JP 15701378 A JP15701378 A JP 15701378A JP 15701378 A JP15701378 A JP 15701378A JP S5582082 A JPS5582082 A JP S5582082A
Authority
JP
Japan
Prior art keywords
time
forecast
tone
signal
timer
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
JP15701378A
Other languages
Japanese (ja)
Inventor
Keiji Shimano
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP15701378A priority Critical patent/JPS5582082A/en
Publication of JPS5582082A publication Critical patent/JPS5582082A/en
Pending legal-status Critical Current

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  • Electromechanical Clocks (AREA)

Abstract

PURPOSE: To accurately perform the time correction in matching with the correct time, by the timer control through the detection of time forecast tone of specific frequency with the logical filter.
CONSTITUTION: The time forecast signal a in 440kHz received controls the opening of the gates 13, 13' after being the accurate signals b, c in 220Hz and duty ratio 50% with the T-type FF12 of the logic filter circuit 6, and the counters 14, 14' count a given pulse from the watch section and set and reset the latches 16, 16' when the count value reaches specified two different numbers. Further, the output of the monostable multivibrators 15, 15' via the delay circuits 21, 21' triggered at the trailing of the signals b, c and the synchronizing pulses f, g are produced from the latches 16, 16'. Thus, D-type FF18 produced 0.1sec signal h as far as the forecast tone within a given frequency range continues. This signal corrects the time at the watch section 4 with high accuracy at the corrects time in response to the time forecast based on the tone detected with the logic filter of selectivity for specific frequency only via the one second timer 8, counter 10 and timer 11.
COPYRIGHT: (C)1980,JPO&Japio
JP15701378A 1978-12-14 1978-12-14 Correction watch for time forecast Pending JPS5582082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15701378A JPS5582082A (en) 1978-12-14 1978-12-14 Correction watch for time forecast

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15701378A JPS5582082A (en) 1978-12-14 1978-12-14 Correction watch for time forecast

Publications (1)

Publication Number Publication Date
JPS5582082A true JPS5582082A (en) 1980-06-20

Family

ID=15640263

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15701378A Pending JPS5582082A (en) 1978-12-14 1978-12-14 Correction watch for time forecast

Country Status (1)

Country Link
JP (1) JPS5582082A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5246912B2 (en) * 1975-05-13 1977-11-29

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5246912B2 (en) * 1975-05-13 1977-11-29

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