EP0161438A1 - Uhrwerk das wenigstens eine Chronograph-Funktion enthält - Google Patents

Uhrwerk das wenigstens eine Chronograph-Funktion enthält Download PDF

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Publication number
EP0161438A1
EP0161438A1 EP85103618A EP85103618A EP0161438A1 EP 0161438 A1 EP0161438 A1 EP 0161438A1 EP 85103618 A EP85103618 A EP 85103618A EP 85103618 A EP85103618 A EP 85103618A EP 0161438 A1 EP0161438 A1 EP 0161438A1
Authority
EP
European Patent Office
Prior art keywords
hand
motor
chronograph
timepiece
per
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.)
Granted
Application number
EP85103618A
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English (en)
French (fr)
Other versions
EP0161438B1 (de
Inventor
Giger Urs
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.)
ETA SA Manufacture Horlogere Suisse
Ebauchesfabrik ETA AG
Original Assignee
Ebauchesfabrik ETA AG
Eta SA Fabriques dEbauches
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 Ebauchesfabrik ETA AG, Eta SA Fabriques dEbauches filed Critical Ebauchesfabrik ETA AG
Publication of EP0161438A1 publication Critical patent/EP0161438A1/de
Application granted granted Critical
Publication of EP0161438B1 publication Critical patent/EP0161438B1/de
Expired legal-status Critical Current

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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
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F8/00—Apparatus for measuring unknown time intervals by electromechanical means
    • G04F8/003—Apparatus for measuring unknown time intervals by electromechanical means using continuously running driving means

Definitions

  • the present invention relates to a timepiece comprising an electronic oscillator as a time base, a frequency divider and a stepping motor driving at least one second hand obeying a chronograph mechanism using which second hand can be started, stopped, and then brought back to its starting point.
  • the frequency divider circuit has two outputs of different frequencies, one at 1 Hz to control the watch motor and the other at at least 8 Hz to control, via an engagement switch and an auxiliary frequency divider, the chronograph motor (s).
  • the switch When the switch is turned on, the auxiliary divider begins to count the pulses at 8 Hz received from the main frequency divider to deliver at its output a control pulse for eight pulses received at its input.
  • the display error can reach the value of - 1 second if the chrono function is triggered just before the arrival of the eighth pulse. It should be noted in passing that this error could be ⁇ 1 second at most if an auxiliary divider was not provided and if the chronograph motor was controlled directly by pulses at 1 Hz from the main divider.
  • the chronograph watch described in document GB-A-2 028 545 also uses two stepping motors, one of which actuates the train indicating the current time, and the other the chronograph train.
  • the chronograph motor is driven by pulses which exit the divider circuit at a frequency of 10 Hz.
  • the central seconds hand which is part of the chronograph display mechanism, is driven at a rotational speed of ten times the speed normal, so that it makes a dial turn in six seconds. In this way it is possible to read the tenth of a second.
  • the reduction ratios that must be provided in the chronograph train to drive a minute counter and an hour counter are then such that the size of the movement of the chronograph watch becomes significant. It should also be said that the reading of periods of duration less than one minute, but more than six seconds is then difficult.
  • the known chronograph watch cited in the above paragraph is equipped with a stepping motor which progresses at the rate of one step per second.
  • the measurement error can extend to ⁇ 1 second, which in many cases may seem unacceptable.
  • the timepiece shown in FIG. 1 comprises a case 1 which contains all of the mechanisms and circuits necessary for the display which appears on a dial 2 above which several hands move.
  • the timepiece is a chronograph watch.
  • the current time is displayed using an hour hand 3, a minute hand 4, a small second hand 5 and a date indicator 12.
  • the time is set using crown 6.
  • the chronograph for its part comprises a large central second hand 7, a minute counter 8 and an hour counter 9.
  • the chronograph is controlled by an engagement and stop button 10 and by a button reset 11.
  • the timepiece described comprises at least one second hand obeying a chronograph mechanism with the aid of which said hand can be started, stopped, then brought back to its starting point.
  • the hands are controlled by a single stepping motor 15 itself controlled by a frequency divider 16 in turn excited by a time base 17 as shown in Figure 2
  • the axis of the stepping motor controls the chronograph display mechanism 18.
  • the motor 15 also controls a timepiece display mechanism 19 with its hand small second 5. Note that the motor 15 is preceded by a shaping circuit which receives the signals from the divider 16, a circuit which is not shown in the drawing.
  • the invention is distinguished by the fact that the frequency divider 16 is arranged to supply the motor 15 with at least two driving pulses per second, which will result in advancing the seconds hand 7 at least two steps per second. This appears in the division in front of which the second hand 7 of FIG. 1 moves, where, between two indices 20 indicating the seconds, an additional index 21 indicating the half second is arranged.
  • the time base 17 is a quartz oscillator delivering 32,768 vibrations per second
  • the divider 16 will include 14 stages-dividers by two to deliver at its output a frequency of 2 Hz.
  • a divider 16 comprising 13 divider stages will output a frequency of 4 Hz at its output.
  • the second advantage is that by increasing the number of pulses per unit of time, the motor can cause higher loads if the reduction ratio between the rotor axis and the needle axis increases in the same proportions.
  • a stepping motor calculated to drive a simple timepiece display mechanism can be used to drive a chronograph mechanism requiring more power and even a chronograph mechanism mounted in bypass on a timepiece mechanism, this without increasing the size of said motor.
  • the stepping motor chosen is the one calculated to drive a timepiece movement with a large second hand.
  • the motor advances at the rate of two steps per revolution and the seconds hand advances by 6 ° every second.
  • the reduction ratio is 30 and the torque measured on the axis of the second hand is 6 u Nm.
  • the gear ratio will be increased to 60 and the torque available on the second hand will increase to 12 ⁇ Hm. It is therefore understood that the proposed device allows to cause a movement requiring a higher torque with an engine whose size does not vary. This is important, especially for sizes which we want to keep a small thickness.
  • the above formula shows that the average consumption increases with the number n of pulses per minute.
  • Cci 0.3 pA
  • Cmot 1 pA
  • the consumption at 1 Hz of 1 ⁇ A corresponds to that of a simple known watch movement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electromechanical Clocks (AREA)
EP85103618A 1984-03-28 1985-03-27 Uhrwerk das wenigstens eine Chronograph-Funktion enthält Expired EP0161438B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1559/84 1984-03-28
CH155984A CH658567GA3 (de) 1984-03-28 1984-03-28

Publications (2)

Publication Number Publication Date
EP0161438A1 true EP0161438A1 (de) 1985-11-21
EP0161438B1 EP0161438B1 (de) 1988-11-09

Family

ID=4213254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85103618A Expired EP0161438B1 (de) 1984-03-28 1985-03-27 Uhrwerk das wenigstens eine Chronograph-Funktion enthält

Country Status (6)

Country Link
US (1) US4655606A (de)
EP (1) EP0161438B1 (de)
JP (2) JPS60218092A (de)
CH (1) CH658567GA3 (de)
DE (1) DE3566174D1 (de)
HK (1) HK121493A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3534204A1 (de) * 1984-09-26 1986-04-10 Citizen Watch Co., Ltd., Tokio/Tokyo Elektronische uhr mit stoppeinrichtung
US7487302B2 (en) 2004-10-01 2009-02-03 Lockheed Martin Corporation Service layer architecture for memory access system and method

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW494287B (en) * 2000-11-29 2002-07-11 Ebauchesfabrik Eta Ag Electronic chronograph watch with analogue display
RU2006133545A (ru) * 2004-02-20 2008-03-27 Дэниел ЛАЗАРЕТНИК (US) Овальные часы и конструкция головок для наручных часов
US7120093B2 (en) * 2004-02-20 2006-10-10 Daniel Lazaretnik Oval shaped timepieces and stem arrangement for watches
DE102012020817A1 (de) * 2012-03-13 2013-09-19 Hannes Bonhoff Verfahren zum Eingeben eines Passworts und Computerprogrammprodukt
JP6338920B2 (ja) * 2014-04-23 2018-06-06 セイコーエプソン株式会社 アナログ電子時計
JP6420965B2 (ja) * 2014-04-23 2018-11-07 セイコーエプソン株式会社 時間計測装置
EP3059642B1 (de) * 2015-02-23 2019-05-22 Montres Breguet S.A. Uhrmechanismus
EP3059643B1 (de) * 2015-02-23 2017-07-19 Montres Breguet S.A. Uhrmechanismus
DE102020135100B4 (de) * 2020-12-30 2022-08-11 Realization Desal Ag Armbanduhr

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2023409A1 (de) * 1968-11-15 1970-08-21 Junghans Gmbh Geb
FR2203108A1 (de) * 1972-10-13 1974-05-10 Grand Cap Cie Sa
GB2008291A (en) * 1977-09-30 1979-05-31 Citizen Watch Co Ltd Electronic Timepiece e.g. a Chromograph
GB2067798A (en) * 1980-01-21 1981-07-30 Ebauches Sa Chronographic watch
FR2521799A1 (fr) * 1982-02-16 1983-08-19 Portescap Dispositif de commande d'un moteur electrique pas a pas
GB2128380A (en) * 1982-10-07 1984-04-26 Seiko Instr & Electronics Electronic timepiece

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH225004A (fr) * 1941-12-06 1942-12-31 Ltd Buttes Watch Co Mouvement de montre-chronographe.
CH527462A (fr) * 1967-09-22 1972-03-15 Depraz & Cie Montre-chronographe
CH533870A (fr) * 1970-08-07 1972-08-15 Ebauches Sa Pièce d'horlogerie électrique à chronographe
JPS4971970A (de) * 1972-11-10 1974-07-11
JPS54136875A (en) * 1978-04-17 1979-10-24 Seiko Epson Corp Analog electronic watch
JPS557662A (en) * 1978-07-04 1980-01-19 Seiko Epson Corp Crystal watch of analog chronograph
US4211066A (en) * 1978-09-29 1980-07-08 Kabushiki Kaisha Daini Seikosha Stop watch
JPS55152488A (en) * 1979-05-18 1980-11-27 Rhythm Watch Co Ltd Electronic analogue timepiece
JPS5728282A (en) * 1980-07-29 1982-02-15 Citizen Watch Co Ltd Electronic watch
EP0048217A1 (de) * 1980-09-12 1982-03-24 Compagnie des Montres Longines, Francillon S.A. Elektronische Uhr
JPS58158579A (ja) * 1982-03-16 1983-09-20 Seiko Instr & Electronics Ltd 電子時計
GB2124803B (en) * 1982-06-07 1985-12-11 Suwa Seikosha Kk Improvements in or relating to electronic analog timepieces

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2023409A1 (de) * 1968-11-15 1970-08-21 Junghans Gmbh Geb
FR2203108A1 (de) * 1972-10-13 1974-05-10 Grand Cap Cie Sa
GB2008291A (en) * 1977-09-30 1979-05-31 Citizen Watch Co Ltd Electronic Timepiece e.g. a Chromograph
GB2067798A (en) * 1980-01-21 1981-07-30 Ebauches Sa Chronographic watch
FR2521799A1 (fr) * 1982-02-16 1983-08-19 Portescap Dispositif de commande d'un moteur electrique pas a pas
GB2128380A (en) * 1982-10-07 1984-04-26 Seiko Instr & Electronics Electronic timepiece

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3534204A1 (de) * 1984-09-26 1986-04-10 Citizen Watch Co., Ltd., Tokio/Tokyo Elektronische uhr mit stoppeinrichtung
US7487302B2 (en) 2004-10-01 2009-02-03 Lockheed Martin Corporation Service layer architecture for memory access system and method
US7619541B2 (en) 2004-10-01 2009-11-17 Lockheed Martin Corporation Remote sensor processing system and method

Also Published As

Publication number Publication date
HK121493A (en) 1993-11-12
EP0161438B1 (de) 1988-11-09
CH658567GA3 (de) 1986-11-28
US4655606A (en) 1987-04-07
JPS60218092A (ja) 1985-10-31
DE3566174D1 (en) 1988-12-15
JPH0682591U (ja) 1994-11-25

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