EP0231451B1 - Elektronische Uhr mit zwei Motoren, die einen ewigen Kalender enthält - Google Patents

Elektronische Uhr mit zwei Motoren, die einen ewigen Kalender enthält Download PDF

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Publication number
EP0231451B1
EP0231451B1 EP86116038A EP86116038A EP0231451B1 EP 0231451 B1 EP0231451 B1 EP 0231451B1 EP 86116038 A EP86116038 A EP 86116038A EP 86116038 A EP86116038 A EP 86116038A EP 0231451 B1 EP0231451 B1 EP 0231451B1
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EP
European Patent Office
Prior art keywords
signal
month
day
circuit
date
Prior art date
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Expired - Lifetime
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EP86116038A
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English (en)
French (fr)
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EP0231451A1 (de
Inventor
Pierre-André Meister
Pierre Schmidli
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ETA SA Manufacture Horlogere Suisse
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Eta SA Fabriques dEbauches
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    • 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
    • G04C3/146—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor incorporating two or more stepping motors or rotors
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C17/00—Indicating the time optically by electric means
    • G04C17/005—Indicating the time optically by electric means by discs
    • G04C17/0058—Indicating the time optically by electric means by discs with date indication
    • G04C17/0066—Indicating the time optically by electric means by discs with date indication electromagnetically driven, e.g. intermittently
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
    • G04G19/10—Arrangements for supplying back-up power

Definitions

  • the present invention relates to an analog electronic watch comprising two motors, the first motor driving the time display and the second motor displaying the date. It relates more particularly to a watch further comprising a perpetual calendar circuit.
  • This circuit includes counters of days, months and years and supplies a signal representative of the date to a control circuit which activates the second motor by advancing it by the number of steps necessary so that the indication of the date corresponds to the content of the day counter and therefore be in accordance with the indication of a perpetual calendar.
  • Such watches are well known and an exemplary embodiment is described in US Pat. No. 4,300,222.
  • the watch described in this document is provided with a perpetual calendar displaying the date and, possibly, the day of the week. If the calendar does not raise any criticism as long as the watch functions normally, on the other hand, after a change of battery, the counters putting themselves in states having no relation to the date, the calendar circuit is no longer able to provide correct signals.
  • the battery change can only be carried out in the factory or in an after-sales service center, which constitutes a major constraint in the use of a watch which is otherwise very practical.
  • An advantage of the present invention comes from the fact that after changing the battery, it is sufficient to reset the date to the correct date by simple manipulation, which can be carried out by the user in the same way as in a conventional calendar watch. , so that the perpetual calendar circuit works correctly again.
  • FIGS. 1A and 1B show a preferred embodiment of the watch according to the present invention.
  • timekeeping circuit 1 which provides a time base signal S1 to a first motor 2 which, by means of a control mechanism 3, causes a time display 4 comprising hands hours, minutes and seconds.
  • the timepiece circuit 1 includes an oscillator 10 stabilized in frequency by a quartz resonator 11, providing a signal of 32,768 Hz for example, an AND gate 12 with two inputs, one of these inputs being connected to the output of the oscillator , a frequency divider 13 whose input is connected to the output of the AND gate 12, and a drive circuit 14 receiving from the frequency divider a signal of 1 Hz and supplying at its output the signal S1.
  • the frequency divider 13 also has an output which delivers a catch-up signal S13 having a frequency of the order of 10 Hz, and a reset input R which is connected to the output of an inverter 15 whose input is connected to the second input of AND gate 12.
  • the first motor 2 is, for example, of the stepping type with a direction of rotation, or unidirectional. It drives, in the control mechanism 3, a first gear train, not shown, which advances the hands of the display 4. This same gear train also actuates a daily contact X, or first contact, closing it when passing the watch from one day to the next day, that is to say at midnight, to produce a daily logic signal Sx. It will be assumed that the signal Sx is at the low logic level when the contact X is open, and at the high logic level when this contact is closed. The same rule will be applied to the other signals produced by contacts which will be described later.
  • the control mechanism 3 also comprises correction means, not shown, for setting the watch to the time using a correction member, for example a time-setting crown 16, shown in its position push or neutral.
  • a correction member for example a time-setting crown 16, shown in its position push or neutral.
  • This crown can also occupy a pulled or correction position, referenced 16 ′, in which it is mechanically coupled with the hands, making it possible to correct the indications of the display 4 in a conventional manner.
  • the crown 16 also acts, whatever its angular position, on a contact of position Y, or second contact, which produces a logic signal Sy which is applied to the second input of the AND gate 12. This contact is closed when the crown 16 is in the neutral position, and open when the crown is in the correction position.
  • the signal Sy is at the low logic level, which has the effect of blocking the AND gate 12 and resetting the frequency divider 13 which does not receive, under these conditions, no signal. It is the same for engine 2, which remains at rest.
  • the hands of the display 4 can then only be moved by the crown which, in this position, is linked to the gear train in order to allow the watch to be set precisely.
  • the contact X is activated in the same way as when they are driven by the first motor.
  • the watch also has a perpetual calendar which indicates the day of the month. This information is given by a date display 20, produced conventionally using a disk bearing the numbers 1 to 31. In the drawing, the display 20 is separate from the display 4, but in reality the date appears in a window 21 of the time display.
  • the display 20 also activates a date contact Z on the first of each month using, for example, a tooth 22 placed on the disc opposite the number 1.
  • This contact which constitutes an object of the invention, provides a date signal Sz. which goes to the high logic level at the beginning of the first of each month and returns, a day later, to the low logic level, a state in which it remains until the beginning of the following month.
  • the jump to the date is carried out using a second unidirectional motor 23 which drives the display 20 via a second gear train 24.
  • the motor 23, for its part, is activated by a signal S25 control unit supplied by a control circuit 25.
  • This circuit 25 comprises an AND gate 26 with three inputs, an OR gate 27 with two inputs, one input of which is connected to the output of the AND gate 26, and a drive circuit 28 connected to the output of the gate 27 and which provides at its output the control signal S25.
  • An input of AND gate 26 receives the catch-up signal S13, another input receives the date signal Sz, and the last input a monthly signal which will be defined later.
  • the other input of the OR gate 27 receives the daily signal Sx.
  • the watch also has a perpetual calendar circuit 30 comprising a day counter 31 of 5 bits counting by 31, a month counter 32 of 4 bits counting by 12 and a year counter 33 of 2 bits counting by 4. These counters which constitute a date counter circuit, are connected in series.
  • the counter 31 receives on its input the daily signal Sx and provides on an output, at the beginning of each month, the monthly signal, referenced Sm, to the counter 32 which, in turn, provides at the beginning of each year an annual signal Sa to the counter 33.
  • On another output of each counter there appears a signal representative of its content, referenced S31 for the counter 31, S32 for the counter 32 and S33 for the counter 33.
  • the counter 32 also supplies a signal Smc indicating the short months and the counter 33 a signal Sab indicating the leap year in a 4-year cycle.
  • the circuit 30 further comprises a correction circuit 34 which receives the signals Smc and Sab.
  • This circuit elaborates, from the signals Smc and Sab, a correction signal S34 for the counter 31, putting the content of this counter to 1 when the calendar changes from one short month to the next month. In this way the content of the counter 31 always remains in accordance with the indications of a perpetual calendar.
  • All the signals S31, S32 and S33 form an 11-bit calendar signal S30 representative of the date contained in the counters 31, 32 and 33.
  • Each of these counters also includes an input E enabling them to be set, using a logic signal, respectively on a given day, month and year. However, this date setting can only be carried out in the factory.
  • circuit 30 will not be described in detail because such circuits are well known and an exemplary embodiment is described in the cited reference.
  • the monthly signal Sm is applied to the last input of gate AND 26 of the circuit.
  • control 25 the operation of which is as follows. Assuming that the date 20 and the calendar circuit 30 have been set to the date, the daily signal Sx, reaching midnight the entry of the attack circuit 28 through the OR gate 27, will advance the date 20 by one day . The same signal will also increment the day counter 31 by one. If the date and the day counter indicate a date other than that of the last day of a month, the signals Sz and Sm will be respectively at the high logic level and at the low logic level. The catch-up signal S13, in this case, is blocked by means of the AND gate 26 by the signal Sm. The date 20, having taken a step, will therefore remain in this position until the next contact X is closed.
  • the signal Sx will change, at midnight, the calendar to 31 and the content of the day counter to 1.
  • the signal Sm will then pass at the logic level high, level at which the signal Sz is located since the contact Z is closed in this position of the date.
  • the catch-up signal S13 is assumed to be formed of pulses and to have a frequency, for example, of 8 Hz. This signal can, under these conditions, pass through AND gates 26 and OR 27, to reach circuit 28.
  • the circuit 28 advances the calendar by one day. In this case, the date indicating 31, a single pulse of the signal S13 is sufficient to change the date to 1 and bring it into line with the content of the counter 31.
  • this contact also makes it possible, in the event of a malfunction of the date,. synchronize the date with the content of the day counter on the first of each month. Indeed, whatever the indication provided by the date 20 when the content of the counter 31 is equal to 1 and the monthly signal Sm at the high logic level, the AND gate 26 will allow the number of pulses of the catch-up signal S13 to pass necessary to position the date on the first of the month.
  • the drive circuit 28 produces at its output the control signal S25 as soon as a signal appears at the output of the OR gate 27. The duration of this latter signal therefore does not influence the control signal. Thus, if a pulse of the catch-up signal S13 is interrupted by the opening of the contact Z and is thus shortened, the date will still carry out a normal movement.
  • the control signal S25 may contain only one single pulse rotating the motor 23 by one step.
  • it is advantageous to move the date by causing the motor N not to respond in response to a control signal S25 formed of a series of N consecutive pulses. The triggering of a pulse in a series automatically causes the appearance of the other pulses in the series, so that the date can only move in whole days.
  • the control circuit 25 can also be designed so that it generates the control signal S25, advancing the date by the number of days required at the end of a short month, from the information provided by the signals Smc and Sab , instead of those provided by the signal Sz.
  • An embodiment of such a circuit is described, for example, in the cited document. Contact Z then becomes useless.
  • this solution has the drawback of not allowing the date 20 to be synchronized, in the event of the latter malfunctioning, with the content of the counter 31 the first of each month.
  • the circuits of the watch described are supplied with energy by a battery, not shown. After the initial setting of the watch to the time and date, it will continue to correctly indicate the time as long as the battery voltage remains above a critical threshold.
  • the watch also comprises a first transmission circuit 40, a reprogrammable non-volatile memory 41, also called EEPROM, constituting another object of the invention, a second transmission circuit 42, and a detection circuit for tension 43.
  • a reprogrammable non-volatile memory 41 also called EEPROM
  • the transmission circuits can, for example, be produced using transmission doors which are electronic components known per se, while the non-volatile memory, with its interface circuits allowing the recording and the reading of 'information, can advantageously be of FAMOS type also known per se.
  • the use of such a memory in watchmaking is known and, for example, the CH patent. 534913 describes a logic frequency correction circuit where the content of the non-volatile memory determines the running of a watch.
  • the first transmission circuit 40 makes it possible to transfer the content of the counters of the calendar circuit 30 in the non-volatile memory 41 in response to a transfer signal.
  • the circuit 40 comprises a first series of 5 transmission doors referenced 44. These doors are connected, on the one hand, to the output of the counter 31 to receive the 5-bit signal S31 and, on the other hand, at the entry of a first 5-bit section 47 of the memory 41. These gates are controlled by the transfer signal which, in this case, is the daily signal Sx.
  • the second transmission circuit 42 has the same structure as the circuit 40. It thus also comprises a first series of 5 transmission doors referenced 50. These doors are connected, on the one hand, to the output of section 47 of the memory 40 to receive the signal S31 and, on the other hand, to the input E of the counter 31.
  • the circuit 43 which is a monostable flip-flop known per se, supplies a detection signal S43 indicating that the voltage across the terminals of the circuits is again at least equal to the critical threshold. This signal is taken as transfer signal for the second transmission circuit 42. Therefore, at this instant, while the state of the counter 31 is arbitrary, this counter receives on its input E the signal S31 which existed at the time of the watch stop.
  • the circuit 40 also includes a series of 4 transmission doors 45 used to transmit each month, in response to the signal Sm, the signal S32 in a section 48 of the memory 41. Finally, a series of two transmission doors, referenced 46, used to transmit the signal S33 in a section 49 of the same memory.
  • the transmission circuit 42 also comprises a series of 4 transmission doors 51, connected in this case to the output of section 48 and to the input E of the counter 32, as well as a series 2 transmission doors 52 connected to the output of section 49 of the same memory and to the input E of the counter 33, the signal S43 being taken as transfer signal for all these doors.
  • the calendar circuit 30 receives, from non-volatile memory 41, the signal S30 which existed at the time of the stop of the watch, putting the counters of this circuit in the state corresponding to the date on which the watch stopped.
  • the watch which has just been described may advantageously comprise, in addition, a time zone device with magnetic positioning, known per se.
  • the crown 16 must then be able to occupy a second correction position, not shown, in which it acts on part of the first gear train to move, by whole hours, only the hour hand and activate the contact X.
  • the date 20 is then moved by a whole day and the counter 31 incremented by one.
  • the Y contact remains closed, so that the watch continues to operate normally.
  • the second motor 23 can advantageously be of the type with two directions of rotation, or bidirectional.
  • the control mechanism 3 must then include means, for example contacts, making it possible to determine, using a discrimination circuit not shown but known per se, the direction of rotation of the crown 16 when it is located in a corrective position.
  • the discrimination circuit provides a logic signal which is applied to an input, not shown, of circuit 28, and to an input, not shown, of counters 31, 32 and 33.
  • a logic level of this signal corresponds to a rotation in front of the motor, making advance the date, and the incrementation of the counters, while at the other logic level corresponds a rotation behind the motor and the decrementation of the counters.
  • the indication of the date 20 remains, under these conditions, always in agreement with the content of the counter 31, whatever the direction of rotation of the hour hand at the time of activation of the contact X, in response to the rotation of the crown 16 while it is in a correction position.
  • the time zone device alongside the function for which it is intended, also makes it possible, with the assistance of the bidirectional motor 23, to very easily and quickly modify the indication of the date 20 after a battery change.
  • the time setting of the watch could also be done electronically by signals produced by a time setting circuit, not shown but known per se, activating the first motor 2 in response to a rotation of the crown 16.
  • the motor 2 was also of the bidirectional type.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)

Claims (6)

1. Elektronische Uhr, umfassend :
eine elektrische Energiequelle ;
eine Zeitmeßeinrichtung ; und
eine Kalendereinrichtung,
in welcher die Zeitmeßeinrichtung aufweist :
einen Zeitmeßschaltkreis (1), der ein Zeitgrundsignal (S1) liefert ;
einen ersten Motor (2), der auf das Zeitgrundsignal anspricht ;
einen Steuermechanismus (3) bestehend aus einem ersten Zahnradgetriebe, angetrieben durch den ersten Motor, und einem korrekturglied (16) ;
eine analoge Uhrzeitanzeige (4), angetrieben durch das Zahnradgetriebe, wobei die Angaben dieser Anzeige durch das Korrekturglied geändert werden können ; und
Mittel (X) zum Erzeugen eines Tagessignals (Sx), und in welcher die kalendereinrichtung aufweist :
einen zweiten Motor (23) ;
ein zweites Zahnradgetriebe (24), angetrieben durch den zweiten Motor;
eine analoge Kalenderanzeige (20), angetrieben durch das zweite Zahnradgetriebe ;
einen Schaltkreis zur fortwährenden Zeitberechnung (30), der einen Datumszählerschaltkreis (31, 32, 33) gespeist durch das Tagessignal (Sx), aufweist und ein Zeitberechnungssignal (S30) repräsentativ für den Stand der Zeitberechnung sowie ein Monatssignal (Sm), das das Ende jedes Monats feststellt, liefert ; und
einen Steuerschaltkreis (25), der das Tagessignal (Sx) und das Monatssignal (Sm) empfängt zum Liefern eines Steuersignals (S25) an den zweiten Motor, wobei dieses Steuersignal ein Umschalten der Kalenderanzeige bewirkt um einen Tag am Ende jeden Tages und am Ende jeden Monats um die Zahl an notwendigen lagen, damit die Kalenderanzeige auf die Ziffer 1 geht, dadurch gekennzeichnet, daß die Kalendereinrichtung weiterhin umfaßt :
einen nicht flüchtigen umprogrammierbaren Speicher (41), einen ersten Übertragungsschaltkreis (40) zum Sichern der Übertragung des Zeitberechnungssignals (S30) in dem nicht flüchtigen Speicher derart, daß die in dem Zähler enthaltenen Informationen im Falle einer Unterbrechung der Speisung durch die Energiequelle geschützt sind ; und
eine Steuereinrichtung, die einen Detektor (43) und einen zweiten Übertragungsschaltkreis (42) umfaßt, wobei der Detektor ein Signal repräsentativ für die von der Energiequelle gelieferte Spannung empfängt und als Antwort auf das Feststellen einer steigenden Vorderflanke der Spannung ein Aktivierungssignal des zweiten Übertragungsschaltkreises liefert, um den Inhalt des nicht flüchtigen Speichers in den Datumszähler bedingungslos zu bringen, bis nach einer Unterbrechung der Speisung der Schaltkreise durch die Energiequelle diese Speisung wieder hergestellt ist.
2. Uhr nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel zum Erzeugen eines Tagessignals (Sx) einen kontakt (X) umfassen, der durch das Zahnradgetriebe im Moment des Übergangs der Uhr von einem Tag auf den folgenden Tag aktiviert wird.
3. Uhr nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Schaltkreis Zur Zeitberechnung (30) einen Tages- (S1), Monats- (32) und Jahreszähler (33), die in Serie geschaltet sind und den Datumszähler bilden, und einen Korrekturschaltkreis (54) umfaßt, der an den Monats- und Jahreszähler gelegt und dazu bestimmt ist, den Inhalt des Tageszählers am Ende jeden Monats mit weniger als 21 lagen auf 1 zu setzen, wobei dank des Korrekturschaltkreises die Zahl der Tage in jedem Monat des Jahres und der Schaltjahre berücksichtigt werden.
4. Uhr nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Steuerschaltkreus (25) weiterhin ein Nachlaufsignal, gebildet von Impulsen mit einer Periode etwa kürzer als 8 Stunden empfängt, und daß er Mittel (26, 27, 28) aufweist zur Gewinnung des Steuersignals (S25) derart, daß am Ende jeden Monats mit weniger als 31 Tagen dieses Signal zu dem Tagessignal (Sx) noch 1, 2 oder 3 Impulse des Nachlaufsignals dazu enthält, wobei die Zahl der Impulse abhängt von dem Monat und dem Jahr derart, daß die Kalenderanzeige auf die Ziffer 1 geht.
5. Uhr nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß sie weiterhin aufweist einen Kalenderkontakt (Z), aktiviert durch die Kalenderanzeige (20) in dem Moment, wo sie die 1 passiert, der ein Kalendersignal (Sz) an den Steuerschaltkreis (25) liefert, um am Ende jeden Monats den Kalender mit dem Inhalt des Tageszählers (31) in Übereinstimmung zu bringen.
6. Uhr nach den Ansprüchen 4 und 5, dadurch gekennzeichnet, daß die Mittel des Steuerschaltkreises (25) umfassen :
ein UND-Glied (25) mit drei Eingängen, wobei der erste Eingang das Monatssignal (Sm). der zweite Eingang das Nachlaufsignal (S13) und der dritte Eingang das Kalendersignal (Sz) empfängt ;
ein ODER-Glied (27) mit zwei Eingängen, wobei ein Eingang das Ausgangssignal des UND-Gliedes und der andere Eingang das Tagessignal (Sx) empfängt ; und
einen Treiberschaltkreis (28), der das Ausgangssignal des ODER-Gliedes empfängt und das Steuersignal (S25) an den zweiten Motor (23) liefert.
EP86116038A 1985-12-18 1986-11-20 Elektronische Uhr mit zwei Motoren, die einen ewigen Kalender enthält Expired - Lifetime EP0231451B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5437/85 1985-12-18
CH543785A CH661833GA3 (de) 1985-12-18 1985-12-18

Publications (2)

Publication Number Publication Date
EP0231451A1 EP0231451A1 (de) 1987-08-12
EP0231451B1 true EP0231451B1 (de) 1990-01-24

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EP86116038A Expired - Lifetime EP0231451B1 (de) 1985-12-18 1986-11-20 Elektronische Uhr mit zwei Motoren, die einen ewigen Kalender enthält

Country Status (7)

Country Link
US (1) US4695168A (de)
EP (1) EP0231451B1 (de)
JP (1) JPH07119811B2 (de)
CH (1) CH661833GA3 (de)
DE (1) DE3668507D1 (de)
HK (1) HK32393A (de)
SG (1) SG126792G (de)

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JPS6039193B2 (ja) * 1977-10-18 1985-09-04 セイコーエプソン株式会社 電子時計
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GB2015208B (en) * 1978-02-27 1982-09-02 Rockwell International Corp Data monitoring and recording system incorporating a real time clock using computer means
JPS6045834B2 (ja) * 1978-03-30 1985-10-12 セイコーエプソン株式会社 時計用日表示部材の送り機構
GB2063160B (en) * 1979-10-30 1984-01-11 Pitney Bowes Inc Electronic postage meter
CH643106B (fr) * 1980-11-26 Suisse Horlogerie Garde-temps comprenant une chaine de diviseurs au rapport de division ajustable.
DE3247910A1 (de) * 1982-12-24 1984-06-28 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Schaltanordnung zur datenspeicherung in kraftfahrzeugen
JPS6033680A (ja) * 1983-08-03 1985-02-21 Hitachi Ltd 標準パタ−ン作成方式

Also Published As

Publication number Publication date
JPH07119811B2 (ja) 1995-12-20
HK32393A (en) 1993-04-08
JPS62147392A (ja) 1987-07-01
US4695168A (en) 1987-09-22
CH661833GA3 (de) 1987-08-31
DE3668507D1 (de) 1990-03-01
EP0231451A1 (de) 1987-08-12
SG126792G (en) 1993-03-12

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