GB1450072A - Electronic timepiece - Google Patents

Electronic timepiece

Info

Publication number
GB1450072A
GB1450072A GB2562274A GB2562274A GB1450072A GB 1450072 A GB1450072 A GB 1450072A GB 2562274 A GB2562274 A GB 2562274A GB 2562274 A GB2562274 A GB 2562274A GB 1450072 A GB1450072 A GB 1450072A
Authority
GB
United Kingdom
Prior art keywords
time
control circuit
predetermined
set amount
signal
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.)
Expired
Application number
GB2562274A
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
Priority claimed from JP9876672A external-priority patent/JPS4957871A/ja
Priority claimed from JP48056444A external-priority patent/JPS508564A/ja
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Publication of GB1450072A publication Critical patent/GB1450072A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G3/00—Producing timing pulses
    • G04G3/02—Circuits for deriving low frequency timing pulses from pulses of higher frequency
    • G04G3/022—Circuits for deriving low frequency timing pulses from pulses of higher frequency the desired number of pulses per unit of time being obtained by adding to or substracting from a pulse train one or more pulses
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
    • G04F5/04—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses
    • G04F5/06—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses using piezoelectric resonators
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/64—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two
    • H03K23/66—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses
    • H03K23/662—Pulse counters comprising counting chains; Frequency dividers comprising counting chains with a base or radix other than a power of two with a variable counting base, e.g. by presetting or by adding or suppressing pulses by adding or suppressing pulses

Abstract

1450072 Electronic timepieces CITIZEN WATCH CO Ltd 24 Sept 1973 [20 Oct 1972 21 May 1973] 25622/74 Divided out of 1450071 Heading G3T In an electronic timepiece such as is described in Specification 1450071, wherein a time standard oscillator is followed by a frequency divider chain producing a time unit signal which is fed to counters the content of which is used to drive a time display, a control circuit is provided to regulate the running rate of the timepiece of adjusting the time kept by the counters by a predetermined pre-set amount at predetermined instances of time; an input terminal means is provided at which an external signal is applied to modify the control circuit and change the pre-set amount. In Fig. 4, the count in a timekeeping counter 44 is compared with a reference stored in a memory in the control circuit 45 which varies the input signal to the counter by the pre-set amount and at predetermined instances in accordance with the stored reference, to correct the running rate. In Fig. 5B, the control circuit includes a detecting circuit 55 connected to compare the value N" of the current counting state of a frequency divider 54 with information stored in a memory 57. The information stored is the predetermined amount of correction value No and a value N corresponding to the predetermined instances of time at which correction is to be made. When the values N' and N" become equal a setting means 56 operates so that the correction value No is applied to the input of divider 54. This in effect changes the division ratio and consequently modifies the time circuit signal applied to the timekeeping counter (not shown).
GB2562274A 1972-10-02 1973-09-24 Electronic timepiece Expired GB1450072A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9876672A JPS4957871A (en) 1972-10-02 1972-10-02
JP48056444A JPS508564A (en) 1973-05-21 1973-05-21

Publications (1)

Publication Number Publication Date
GB1450072A true GB1450072A (en) 1976-09-22

Family

ID=26397385

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2562274A Expired GB1450072A (en) 1972-10-02 1973-09-24 Electronic timepiece
GB4462873A Expired GB1450071A (en) 1972-10-02 1973-09-24 Electronic timepiece

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB4462873A Expired GB1450071A (en) 1972-10-02 1973-09-24 Electronic timepiece

Country Status (3)

Country Link
US (1) US3916612A (en)
DE (2) DE2366320C2 (en)
GB (2) GB1450072A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587190B2 (en) * 1973-12-05 1983-02-08 セイコーエプソン株式会社 Suishiodokei
US4162608A (en) * 1974-06-05 1979-07-31 Kabushiki Kaisha Suwa Seikosha Electronic timepiece frequency regulating circuit
IT1039870B (en) * 1974-07-26 1979-12-10 Eurosil Gmbh ARRANGEMENT OF CONNECTIONS FOR AIMING RESPECTIVELY TO ADJUST A DEVICE FOR MEASURING TIME
US4133169A (en) * 1974-08-30 1979-01-09 Ebauches S.A. Electronic circuit for a quartz crystal watch
JPS5137264A (en) * 1974-09-25 1976-03-29 Citizen Watch Co Ltd
US4176517A (en) * 1974-09-30 1979-12-04 Citizen Watch Co. Ltd. Integrated circuit for timepiece
JPS6024433B2 (en) * 1975-08-01 1985-06-12 シチズン時計株式会社 clock circuit
US4055945A (en) * 1975-12-15 1977-11-01 Timex Corporation Frequency adjustment means for an electronic timepiece
US4141208A (en) * 1976-01-19 1979-02-27 Hughes Aircraft Company Digitally tuned timepiece
CH621036B (en) * 1977-02-28 Berney Sa Jean Claude INTEGRATED CIRCUIT FOR WATCHMAKING PART.
JPS5422865A (en) * 1977-07-21 1979-02-21 Seiko Epson Corp Miniature electronic watch
DE2849797C2 (en) * 1978-11-16 1982-03-11 Siemens AG, 1000 Berlin und 8000 München Digital frequency divider arrangement
US4282594A (en) * 1978-12-27 1981-08-04 Citizen Watch Company Limited Electronic timepiece
JPS55129789A (en) * 1979-03-29 1980-10-07 Seiko Epson Corp Electronic watch
FR2469037A1 (en) * 1979-10-31 1981-05-08 Sonceboz Sa DRIVE DEVICE FOR APPARATUS REQUIRING INTERMITTENT DRIVE
JPS59200986A (en) * 1983-04-28 1984-11-14 Seiko Epson Corp Analog electronic timepiece
CH692534A5 (en) * 1998-11-05 2002-07-15 Em Microelectronic Marin Sa A method of adjusting the operation of a timepiece module by means of destructible fuse by laser.
EP0999483B1 (en) * 1998-11-05 2009-01-21 EM Microelectronic-Marin SA Method for adjusting the frequency of a clock module by means of fuses melted using a laser beam

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1946166U (en) 1966-05-11 1966-09-15 Hermann Wacker VIBRATOR WITH SWITCH ARRANGEMENT.
CH496277A (en) * 1967-09-01 1970-05-29 Patek Philippe Sa Permanent automatic time reset device for a clock
US3540207A (en) * 1968-09-20 1970-11-17 Timex Corp Electronic watch counting circuit
CH510911A (en) * 1969-07-03 1971-01-29 Vogel Paul Time reset device of an electronic watch
JPS5327630B1 (en) * 1971-03-20 1978-08-09
US3756014A (en) * 1971-05-18 1973-09-04 Timex Corp Synchronized quartz crystal watch
US3777471A (en) * 1971-08-27 1973-12-11 Bulova Watch Co Inc Presettable frequency divider for electronic timepiece
CH1548471A4 (en) * 1971-10-25 1974-03-15
GB1385890A (en) * 1971-12-16 1975-03-05 Suisse Pour Lindustrie Horloge Arrangement for correcting of seconds indication of a timepiece

Also Published As

Publication number Publication date
GB1450071A (en) 1976-09-22
DE2349508B2 (en) 1980-05-08
US3916612A (en) 1975-11-04
DE2349508C3 (en) 1981-01-22
DE2349508A1 (en) 1974-04-18
DE2366320C2 (en) 1984-09-06

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19930923