EP3477402B1 - Mondphasen-anzeigevorrichtung - Google Patents

Mondphasen-anzeigevorrichtung Download PDF

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Publication number
EP3477402B1
EP3477402B1 EP18202473.7A EP18202473A EP3477402B1 EP 3477402 B1 EP3477402 B1 EP 3477402B1 EP 18202473 A EP18202473 A EP 18202473A EP 3477402 B1 EP3477402 B1 EP 3477402B1
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Prior art keywords
moon
representation
display device
cache
cam
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Active
Application number
EP18202473.7A
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English (en)
French (fr)
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EP3477402A2 (de
EP3477402A3 (de
Inventor
Jean-François Mojon
Léonard VOGEL
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Richemont International SA
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Richemont International SA
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Publication of EP3477402A3 publication Critical patent/EP3477402A3/de
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/26—Clocks or watches with indicators for tides, for the phases of the moon, or the like
    • G04B19/268—Clocks or watches with indicators for tides, for the phases of the moon, or the like with indicators for the phases of the moon

Definitions

  • the present invention relates to the field of watchmaking. It concerns, more particularly, a device for displaying moon phases combined with the display of another unit of time.
  • Timepieces equipped with a moon phase indicating device are appreciated by users. It is for this reason that manufacturers have proposed a large number of variations on this theme.
  • the aim of the invention is, therefore, to propose an original display device for a timepiece, in which the aforementioned defects are at least partially overcome.
  • the invention relates to a display device for a timepiece, comprising a member for indicating a unit of civil time (hours, minutes, seconds, date, day of the week, number of the week, etc7) movable in rotation and arranged to indicate said unit of time on a corresponding scale.
  • the device further comprises a representation of the moon as well as a moon cover, said representation of the moon and said moon cover being arranged to move relative to each other around a common axis in order to represent the phases of the moon on a cycle of substantially one lunation. It goes without saying that the duration of a lunation, which is of the order of 29 days 12 hours and 44 minutes, can be approximated in order to simplify the construction of the cogs.
  • said representation of the moon as well as said moon cover are arranged to be driven in revolution around said common axis, a first among the representation of the moon and the moon cover, is integral in rotation with said organ of indication, and a second among the representation of the moon and the moon cover, is arranged to perform a relative movement with respect to said first, so as to indicate the moon phases.
  • Said first element can be carried by the indicator member while being integral with the latter, or can be a separate element.
  • the moon phase indication is combined with the display of the civil time unit, which makes it possible to optimize the space occupied on the dial by these two displays.
  • the time division is the date, displayed on a sectoral scale, forming a retrograde display.
  • the display device comprises at least one power take-off arranged to be driven by a movement that the timepiece comprises, as well as a first and a second kinematic chains.
  • the first of these kinematic chains extends from said at least one power take-off and is arranged to control the angular position of the indicator member.
  • the second kinematic chain extends from said at least one power take-off and is arranged to control the angular position of said second among the representation of the moon and the moon cover, that is to say the one which is not integral in rotation with the indicator member.
  • the device further comprises a differential gear.
  • This differential gear has a first input in kinematic connection with, or forming part of, the first kinematic chain; a second input forming part of the second kinematic chain; as well as an output in kinematic connection with said second among the representation of the moon and the moon cover. The management of this last element is thus optimized.
  • the first kinematic chain comprises a snail-shaped cam whose radius is representative of the time division, a cam follower in contact with the cam being in kinematic connection with the indicator member.
  • the cam can be arranged to be driven in steps by means of a corresponding star.
  • the second kinematic chain comprises a moon phase cam, the radius of which is representative of the moon phases, as well as a second cam follower which is in contact with the moon phase cam.
  • the cam follower is in kinematic connection with said second among the representation of the moon and the moon cover.
  • the second input of the differential gear is in kinematic connection with the cam follower.
  • the display device comprises a return spring in kinematic connection with the output. Since the output is in kinematic connection with each of the kinematic chains, a single return spring, thus configured, can act on each of the chains and thus maintain at least one, preferably each, of said cam followers resting against its cam .
  • the representation of the moon which is integral with the indication member and which is therefore said first among said representation of the moon and said moon cover.
  • the moon cover is then said second among said representation of the moon and said moon cover.
  • the display device can be arranged to indicate the moon phase in the northern hemisphere as well as in the southern hemisphere simultaneously.
  • the invention also relates to a timepiece movement comprising a display device as described above, as well as a timepiece comprising such a movement.
  • THE figures 1 and 2 illustrate a preferred embodiment of a display device 1 in accordance with the invention, seen from the back side and the dial side respectively.
  • This device 1 comprises a representation of the moon 3 and a moon cover 5 arranged to be superimposed on the representation of the moon 3 in order to mask the latter at least partially depending on the respective angular position of these two elements.
  • the entire representation of the moon 3 and the moon cover presents an appearance representative of the moon phases.
  • these two elements take the form of discs driven in revolution around a common axis of rotation 7 and which are therefore coaxial.
  • one, the other or each of these elements can be provided on a complete disk.
  • the moon cover 5 can be, for example, a disk provided with a transparent zone or an opening to reveal the moon 3 or can be a transparent disk presenting a dark zone which represents the shadow.
  • the representation of Moon 3 may be a light area provided on a dark colored disk.
  • the representation of the moon 3 is integral in rotation with an indication member 9, which is intended to indicate the value of a unit of civil time and therefore not astronomical on a corresponding scale 10 provided on the dial (see fig. 4 to 7 ).
  • civil time we mean units of time commonly used in daily life, the complete cycle of which and/or their divisions do not directly correspond to a cycle of a star such as the moon or the sun.
  • an astronomical unit of time such as lunations and years, directly corresponds to the movements of the moon around the earth or the earth around the sun.
  • the indicator member 9 is in the form of a needle (but any other suitable shape is also possible) and the unit of time is the date. Therefore, the 10 scale has 31 divisions, one for each of the days of a 31-day cycle.
  • the scale 10 as well as the indicator member 9 can be arranged on the dial according to the needs of the manufacturer.
  • the representation of the moon 3 can be carried by, and therefore integral with, the indicator member 9.
  • the mobile elements of the display can have any rays at the discretion of the manufacturer.
  • the indicator member 9, which bears the representation of the moon 3, is rotated by a first kinematic chain 11.
  • Any power take-off (toothed wheel, movable finger, movable lever, “type” drive system instantaneous date” or similar) on the base movement 53 (see the fig. 3 ) of the timepiece in turn drives a first star 13 at the rate of one step per day, by means of a classic date drive system. Since the unit of time here is the date, the first star 13 has 31 branches and therefore completes one revolution per 31 days. It is positioned angularly by means of a first jumper 14.
  • the first star 13 carries a snail-shaped date cam 15 whose circumference radius corresponds to the date to be displayed.
  • a cam follower 17 is kept in contact with the periphery of the cam 15 by a restoring force whose origin will be described below. It can be noted that it is not obligatory that the first cam 15 be carried directly by the star 13; the cam 15 can alternatively be carried by an intermediate mobile.
  • the cam follower 17 is carried by one end of a rocker 19 which also carries a rack 21 at its other end. This rack 21 in turn meshes with an intermediate mobile 23 which is in kinematic connection with the barrel 25 carrying the representation of the moon 3.
  • this kinematic connection passes through a first input 27 of a differential gear 29.
  • the intermediate mobile 23 can be in direct kinematic connection with the barrel wheel 25 or via a ( or more) other dedicated intermediary mobile(s).
  • the differential gear 29 illustrated here takes the form of a flat differential, the first input 27 of which is the aforementioned satellite carrier mobile which carries any number of satellites 47 (two in the present case).
  • the latter are pivoted on the mobile satellite carrier 27 and each mesh both with the sun pinion 45 which acts as a second input as well as with internal teeth which include a crown 49 acting as an output.
  • the external teeth of this crown 49 mesh with themselves with a second barrel wheel 51 which is integral in rotation with the moon cover 5.
  • the differential gear 29 is a flat differential, all other differential gear constructions are within the reach of those skilled in the art.
  • the indicator member 9 and thus the representation of the moon 3 rotate according to the shape of the cam 15, carrying out a retrograde angular displacement with a period of 31 days .
  • a display performing complete revolutions is also possible, as explained in connection with the fig. 3 below.
  • the moon cover 5 is driven by a second kinematic chain 31 which is connected by a power take-off to the basic movement, in the same way as the first chain 11, the power take-off driving a second star 33 at the rate of one not per day.
  • This power take-off can be the same as, or different from, that driving the first kinematic chain 11.
  • This star 33 has 14 branches and therefore makes a complete revolution in 14 days, its positioning being ensured by means of a second jumper 34 .
  • the fourteen star 33 drives a moon phase cam 37 via a reduction gear 35 so that said cam 37 completes one revolution in substantially 29 days 12 hours and 44 minutes, which corresponds to one lunation.
  • This cam 37 is followed by a second cam follower 39, also carried by one end of a rocker 41, also provided with a second rack 43 at its other end.
  • the second rack 43 meshes with a set of transmission elements 46 comprising two intermediate wheels 46a1 and 46b, which in turn are engaged with a second input 45 of the differential gear 29.
  • this second Input 45 is a sun gear, but any other type of input can also be used.
  • the first star 13 can simply be rotated in one direction via a first corrector 61.
  • This corrector can be of any type, well known in calendar timepieces, arranged to pivot the first star 13 by step.
  • a similar corrector can also be provided to carry out moon phase corrections without influencing the displayed date, by acting similarly in the other direction (reverse direction) on the fourteen star 33 via the corrector lever ( c) and its blade (I) which rests on the finger (d).
  • the moon cover 5 can be integral in rotation with the indicator member and controlled by means of the first kinematic chain.
  • the representation of the moon 3 is positioned appropriately and is controlled by the second kinematic chain 31, the kinematics of which have been modified accordingly so that the moon phases are displayed correctly.
  • the relative directions of rotation of the representation of the moon and the moon cover 5 can be adapted to display the moon phases in the northern hemisphere or in the southern hemisphere; the required modifications (in particular in terms of the shape of the phase cam) are within the reach of those skilled in the art.
  • the set of transmission elements 46 could be replaced by a single intermediate wheel.
  • Each of the kinematic links 11, 31 is connected to the watch movement 53 by the power take-off 54, which is on the same mobile or on two different mobiles, if necessary.
  • the mobile serving as a power take-off 54 can train the kinematic chains 11, 31 using discrete steps or continuous movements, depending on the manufacturer's choice.
  • the first kinematic connection 11 directly drives the indication member 9 carrying a first of said representation of the moon 3 and said moon cover (here the representation of the moon 3).
  • This indicator member 9 pivots around an axis 7 and displays the desired time unit on scale 10.
  • the first kinematic connection 11 is a direct desmodromic connection constructed so that the indicator member 9 makes movements in front of scale 10 with an appropriate rotation speed to indicate the desired unit of time. The movements of the indicator member are thus controlled exclusively by the first kinematic chain 11, without being influenced by the second kinematic chain 31.
  • this first kinematic connection can be simply formed of toothed wheels having an appropriate gear ratio so that the indicator member 9 makes complete revolutions in one direction with the desired period.
  • the first kinematic chain 11 may include cams and racks (or the like) in order to provide a retrograde display as in the embodiment of the fig. 1 and 2 .
  • the first input 27 of the differential gear 29 can be part of the first kinematic connection 11 or can be branched relative to the latter, this alternative construction being represented with an interrupted line.
  • the second kinematic chain 31 extends from the power take-off 54 to the second among said representation of the moon 3 and said moon cover 5 (here the moon cover 5).
  • the second kinematic chain includes the second input 45 as well as the output 49 of the differential gear 29.
  • the part of this chain upstream of the second input 45 is arranged so that the angular position of the second input corresponds to the position relative of said representation of the moon 3 and of said moon cover 5.
  • This upstream part of the kinematic chain can thus include a cam, a system of levers or the like, configured for this purpose.
  • the moon cover 5 follows the rotation of the indication member 9 and the indicated moon phase remains unchanged.
  • the angular position of the output 49 of the differential gear 29 represents the sum of the angular positions of the two inputs 27, 45.
  • the moon cover 5 thus follows the rotation of the indicator member 9 under the control of the first kinematic chain 11 and the relative angular position of these two elements is modified as a function of the second kinematic chain 31.
  • each of the kinematic chains 11, 31 be arranged so that the training of the display members 3, 7, 9 is carried out in discrete steps as in the variant of the fig. 1 and 2 . It is also possible that at least one, or each, of said kinematic chains is arranged so that the corresponding display member 3, 7, 9 is driven continuously.
  • cams 15, 37 have been used in the kinematic chains 11 and 31 respectively, the rockers 19, 41 are subjected to restoring forces allowing the cam followers 17, 39 to remain in contact with their respective cams 15, 37 .
  • a possible solution would be to provide a return spring for each rocker 19, 41.
  • the construction of the present embodiment uses only one return spring 55, for example in the form of a spiral, in kinematic connection with the second kinematic chain 31.
  • the outer end of the return spring 55 is fixed to the frame (not illustrated), and its inner end is integral in rotation with a mobile 57.
  • the latter is in kinematic connection with the second barrel wheel 51 (which, as a reminder , carries the moon cover 5) via a multiplier gear comprising an intermediate mobile 59. Since the second barrel wheel 51 meshes with the crown 49 acting as an output of the differential gear 29, the spring 55 is in kinematic connection with, and can act on each of the kinematic chains 11, 31 via the two inputs 21, 49.
  • moon 3 is full on the 30th of the month.
  • the mechanism is arranged to display the moon phases in the northern hemisphere, the moon cover 5 has recently made a jump from the left side of the representation of the moon 3 (with reference to the figure) towards the position illustrated in order to so that the waning moon can be displayed afterwards.
  • the mechanism is arranged to display the moon phases in the southern hemisphere, the moon cover 5 will soon "bounce" counterclockwise, that is to say change direction, relative to the representation of the moon 3, and for the same purpose.
  • a representation of the moon phase in the southern hemisphere can be obtained by arranging the representation of the moon 3 as well as the moon cover 5 diametrically opposite to their representation in the drawings, that is to say towards scale 10. In this way, the moon phase in the southern hemisphere can be indicated using the same rotation directions mentioned below.
  • a double display to simultaneously indicate the moon phase in the two hemispheres, by providing two representations of the moon 3 as well as two moon covers 5 arranged diametrically opposite to the axis 7.
  • This principle of a double display is described in the document EP1708049 and therefore need not be described in detail here.
  • the rotation directions are also as described below.
  • the indicator member 9 as well as the scale can be arranged as the manufacturer wishes.
  • the last quarter of the moon phases is displayed on the 20th of the month; the moon cover 5 is performing a relative movement in the counterclockwise direction with respect to the representation of the moon 3, which has the effect that the latter is gradually hidden.
  • fig. 6 illustrates a waxing gibbous moon on the 30th of the month, the moon cover 5 approaching the point where it will make a relative jump from the representation of the moon 3 towards the relative position illustrated on the fig. 4 .
  • the fig. 7 illustrates a new moon on the 16th of the month.
  • the moon cover 5 completely covers the representation of the moon 3, and will subsequently reveal the first crescent.

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  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electromechanical Clocks (AREA)
  • Transmission Devices (AREA)

Claims (16)

  1. Anzeigevorrichtung (1) für eine Uhr, umfassend:
    - einem Organ (9) zur Anzeige einer zivilen Zeiteinheit, das so angeordnet ist, die Zeiteinheit auf einer entsprechenden Skala (10) anzuzeigen;
    - eine Monddarstellung (3) sowie eine Mondabdeckung (5), wobei die Monddarstellung (3) und die Mondabdeckung (5) so angeordnet sind, dass sie sich relativ zueinander um eine gemeinsame Achse (7) bewegen, um die Mondphasen über einen Zyklus von im Wesentlichen einer Lunation darzustellen,
    - ein erstes der Monddarstellung (3) und der Mondabdeckung (5) drehfest mit dem Anzeigeorgan (9) verbunden ist, und
    - ein zweites der genannten Monddarstellung (5) und der genannten Mondabdeckung (3) ist so angeordnet, dass es eine Relativbewegung in Bezug auf das erste ausführt, um die Mondphasen anzuzeigen,
    dadurch gekennzeichnet, dass die Monddarstellung (3) und die Mondabdeckung (5) so angeordnet sind, dass sie um die gemeinsame Achse (7) gedreht werden können.
  2. Anzeigevorrichtung (1) nach dem vorhergehenden Anspruch, wobei die genannte zivile Zeiteinteilung das Monatsdatum ist.
  3. Anzeigevorrichtung (1) nach einem der vorhergehenden Ansprüche, umfassend:
    - mindestens einen Abtrieb (54), der so angeordnet ist, dass er von einem Uhrwerk (53) angetrieben wird, das die genannte Uhr umfasst;
    - eine erste kinematische Kette (11), die sich von dem Abtrieb (54) aus erstreckt und so angeordnet ist, um die Winkelposition des Anzeigeorgans (9) zu steuern; und
    - eine zweite kinematische Kette (31), die sich von dem Kraftabgriff (54) aus erstreckt und so angeordnet ist, um die Winkelposition des zweiten der Monddarstellung (3) und der Mondabdeckung (5) zu steuern.
  4. Anzeigevorrichtung (1) nach Anspruch 3, ferner umfassend ein Differentialgetriebe (29), wovon:
    - ein erster Eingang (27) in kinematischer Verbindung mit der ersten kinematischen Kette (11) steht oder Teil davon ist;
    - ein zweiter Eingang (45) Teil der zweiten kinematischen Kette (31) ist; und
    - ein Ausgang (49) in kinematischer Verbindung mit der zweiten der Monddarstellung (3) und der Mondabdeckung (5) steht.
  5. Anzeigevorrichtung (1) nach einem der Ansprüche 3 bis 4, wobei die erste kinematische Kette (11) einen schneckenförmigen Nocken (15) umfasst, dessen Radius die Zeitteilung darstellt, wobei ein Nockenfolger (17), der mit dem Nocken (15) in Kontakt steht, in kinematischer Verbindung mit dem Anzeigeorgan (9) steht, das sich dadurch retrograd bewegen kann.
  6. Anzeigevorrichtung (1) nach Anspruch 5, bei der die schneckenförmige Nocke (15) so angeordnet ist, dass sie von einem jeweiligen Stern (13) angetrieben wird.
  7. Anzeigevorrichtung (1) nach einem der Ansprüche 3 bis 6, wobei die zweite kinematische Kette (31) eine Mondphasennocke (37) umfasst, deren Radius für die Mondphasen repräsentativ ist, wobei ein zweiter Nockenfolger (39), der mit der Phasennocke (37) in Kontakt steht, in kinematischer Verbindung mit dem zweiten der Monddarstellung (3) und der Mondabdeckung (5) steht.
  8. Anzeigevorrichtung (1) nach Anspruch 7, wobei die Phasennocke (37) so angeordnet ist, dass sie über einen entsprechenden Stern (33) schrittweise angetrieben wird.
  9. Anzeigevorrichtung (1) nach Anspruch 4 und einem der Ansprüche 7 oder 8, wobei der zweite Eingang (45) in kinematischer Verbindung mit dem Nockenfolger (39) steht.
  10. Anzeigevorrichtung (1) nach Anspruch 4, mit einer Rückstellfeder (55), die in kinematischer Verbindung mit dem Ausgang (49) steht.
  11. Anzeigevorrichtung (1) nach Anspruch 10 sowie einem der Ansprüche 5 bis 9, wobei die Rückstellfeder (55) so angeordnet ist, dass sie mindestens einen der Nockenfolger (17, 39) in Kontakt mit dem entsprechenden Nocken (15, 37) hält.
  12. Anzeigevorrichtung (1) nach einem der vorhergehenden Ansprüche, wobei das erste der Monddarstellung (3) und der Mondabdeckung (5) die Monddarstellung (3) ist und das zweite der Monddarstellung (3) und der Mondabdeckung (5) die Mondabdeckung (5) ist.
  13. Anzeigevorrichtung (1) nach einem der vorhergehenden Ansprüche, die so angeordnet ist, dass sie die Mondphase in der nördlichen Hemisphäre sowie in der südlichen Hemisphäre gleichzeitig anzeigt.
  14. Anzeigevorrichtung (1) nach einem der vorhergehenden Ansprüche, wobei das erste der Monddarstellung (3) und der Mondabdeckung (5) vom Anzeigeelement (9) getragen wird.
  15. Uhrwerk (53) mit einer Anzeigevorrichtung (1) nach einem der Ansprüche 1-14.
  16. Uhr mit einem Uhrwerk (53) nach Anspruch 15.
EP18202473.7A 2017-10-27 2018-10-25 Mondphasen-anzeigevorrichtung Active EP3477402B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH13022017 2017-10-27

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EP3477402A2 EP3477402A2 (de) 2019-05-01
EP3477402A3 EP3477402A3 (de) 2019-05-08
EP3477402B1 true EP3477402B1 (de) 2024-05-01

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3819716A1 (de) * 2019-11-05 2021-05-12 The Swatch Group Research and Development Ltd Demand-mondanzeigvorrichtung
JP7494093B2 (ja) 2020-11-12 2024-06-03 セイコーウオッチ株式会社 情報表示機構、ムーブメント及び時計
FR3133242B1 (fr) * 2022-03-07 2024-05-10 Watch Connaisseur Project Sa Representation astrale
CH719689A2 (fr) * 2022-05-12 2023-11-30 La Montre Hermes S A Mecanisme d'affichage des phases de la lune pour mouvement horloger

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1321832A1 (de) * 2001-12-20 2003-06-25 Frédéric Piguet S.A. Eine Uhr, bestehend aus einem Mechanismus zum anzeigen der Mondphasen mit rückläufiger Umstellung
CH696917A5 (fr) * 2003-11-12 2008-01-31 Montres Breguet Sa Dispositif indicateur de phases de lune dans une montre.
WO2006018157A1 (fr) * 2004-08-16 2006-02-23 Asulab S.A. Montre affichant la date et une indication astronomique
CH705128B1 (fr) * 2011-06-16 2015-10-15 Télôs Watch SA Dispositif d'affichage du quantième et de la phase de lune.
CN202548538U (zh) * 2012-02-14 2012-11-21 天津海鸥表业集团有限公司 手表月相指针的飞返机构

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EP3477402A3 (de) 2019-05-08

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