EP2503412A1 - Timepiece movement comprising a device with running time equation - Google Patents

Timepiece movement comprising a device with running time equation Download PDF

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Publication number
EP2503412A1
EP2503412A1 EP11159387A EP11159387A EP2503412A1 EP 2503412 A1 EP2503412 A1 EP 2503412A1 EP 11159387 A EP11159387 A EP 11159387A EP 11159387 A EP11159387 A EP 11159387A EP 2503412 A1 EP2503412 A1 EP 2503412A1
Authority
EP
European Patent Office
Prior art keywords
time
movement
equation
minute hand
lever
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
EP11159387A
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German (de)
French (fr)
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EP2503412B1 (en
Inventor
Eric Goeller
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.)
Montres Breguet SA
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Montres Breguet SA
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 Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP11159387.7A priority Critical patent/EP2503412B1/en
Priority to EP12160160.3A priority patent/EP2503407B1/en
Priority to US13/424,528 priority patent/US8588031B2/en
Priority to US13/426,303 priority patent/US8953415B2/en
Priority to RU2012111046/28A priority patent/RU2012111046A/en
Priority to CN201210077616.XA priority patent/CN102692862B/en
Priority to JP2012066697A priority patent/JP2012202996A/en
Priority to CN201210080564.1A priority patent/CN102692865B/en
Priority to JP2012066703A priority patent/JP5346103B2/en
Publication of EP2503412A1 publication Critical patent/EP2503412A1/en
Priority to HK13103483.3A priority patent/HK1176415A1/en
Priority to HK13103603.8A priority patent/HK1177003A1/en
Application granted granted Critical
Publication of EP2503412B1 publication Critical patent/EP2503412B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B19/262—Clocks or watches with indicators for tides, for the phases of the moon, or the like with indicators for astrological informations
    • 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
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/23—Arrangements for indicating different local apparent times; Universal time pieces by means of additional hands or additional pairs of hands

Definitions

  • the present invention relates to a movement for a complicated timepiece intended to rotate a minute hand and a minute hands of the civil time and comprising a device with a walking time equation intended to drive a minute hand of the solar time. rotation coaxially with the hands of the minutes and the hours of the civil time.
  • certain timepieces include a so-called walking time equation device, that is to say whose switch has two concentric minute hands, one indicating the civil time, and the other the solar time, the minute hand of solar time being controlled by a time equation cam whose profile is determined by the difference between the mean solar time and the true time at a given moment.
  • the patent document CH 689'359 describes a watch movement comprising such a device with a walking time equation.
  • the device comprises a time equation cam rotated by the movement at the rate of one revolution per year.
  • This cam cooperates with one end of a rocker, while the other end of the rocker extends facing the axis of rotation of the needles.
  • the equation of time cam rotates the rocker, this pivoting varies the distance between the free end of the rocker and the axis of the needles.
  • the end of the latch facing the needles is provided with an inclined arranged to serve as a cam sector to set the hour of solar minutes time once a day.
  • the device with equation of walking time also includes a gun provided with a pinion and designed to carry the minute hand of solar time.
  • This gun is rotatably mounted concentrically to the hands of minutes and hours of civil time.
  • the correction mechanism of the walking time equation further comprises a solidarity support in rotation of the minute hand of the civil time.
  • a rake is rotated on the support, and the toothed sector of the rake is arranged to mesh with the pinion of the gun of the minute hand of solar time.
  • the handle of the rake carries a positioning stud. It will be understood that the positioning stud rotates about the axis of the needles with the support. It turns therefore at the speed of the minute hand of the civil time.
  • the positioning pin meets the slope of the equation of time lever, it slides against it.
  • the reaction force exerted by the inclined on the pad flaps the latter in the direction of the axis of rotation of the needles.
  • the stud is forced to deviate from its circular path, which rotates the rake.
  • the rake carries with it the pinion of the barrel, which rotates the friction barrel and drives the minute hand of the solar time which thus turns in the clockwise.
  • the rake being rotated on the support, the rotation of the barrel is carried out with respect to the support and thus with respect to the hand of the minutes of the civil time. It will be understood from the foregoing that it is the distance between the positioning pin and the axis of rotation of the needles at the instant when the pin arrives at the end of the inclined, which determines the exact position of the minute hand of solar time.
  • This second mechanism comprises disengaging means for disengaging the barrel of the minute hand of the solar time. These disengaging means are arranged to release the barrel when a force is applied to a control lever provided for this purpose, and to lock the barrel again when the force ceases to be applied.
  • the second mechanism further comprises a triggering device which is controlled by the movement to apply a force, once every 24 hours, on the control lever of the disengaging means. In response to this force, the disengaging means disengage the gun of the minutes of solar time, so that it becomes free to rotate relative to the minute hand of the civil time.
  • the second mechanism further comprises a small spring mounted on the support and which is arranged to push the rake so as to bias the pinion and barrel counterclockwise.
  • the triggering device controlled by the movement is provided to actuate the disengaging means at a time when the positioning pin is facing the beginning of the inclined.
  • the correction of the position of the minute hand of the solar time is done once in 24 hours in two steps.
  • the minute hand of the solar time rotates counterclockwise until it is in a position lagging behind the solar time.
  • the minute hand of the solar time is brought back clockwise to the position determined by the time equation cam.
  • This device has some defects.
  • the need to have a second mechanism to retreat the needle greatly complicates the construction.
  • the barrel of the minute hand of solar time has, at any time, the possibility of turning frictionally relative to the minute hand of the civil time. This possibility can be problematic in case of shock.
  • An object of the present invention is therefore to overcome the drawbacks of the prior art which have just been described, and in particular to correct the equation of walking time in the clockwise direction and in the counterclockwise direction with the same mechanism.
  • the present invention achieves this goal by providing a timepiece movement having a walking time equation device according to the appended claim 1.
  • the frame is kinematically connected to the equation cam of time.
  • the angular position of the chassis is therefore representative of the difference between civil time and solar time.
  • the chassis carries the equation of time lever, the latter being recalled against the periphery of the heart.
  • the force exerted by the lever on the heart generates a torque that tends to return the heart to an equilibrium angular position.
  • the equilibrium angular position is related to the angular position of the frame.
  • the position of the heart at equilibrium is therefore representative of the difference between civil time and solar time.
  • the heart is integral with the gun designed to carry the minute hand of solar time.
  • the heart is thus retained by the barrel as long as no force is exerted on the control lever of the locking means.
  • a pressure is exerted on the control lever, this pressure causes the release of the barrel which is then free to rotate with the heart.
  • the heart and the cannon are then recalled to a position of equilibrium representative of the gap existing between civil time and solar time.
  • the heart and the barrel then remain in the equilibrium position as long as the locking means have not closed.
  • the pressure on the control lever stops, and the locking means again block the barrel. From this moment, the minute hand of the solar time and the hand of the minutes of the civil time are held together and rotate in concert, at the speed of one turn per hour.
  • the angular difference between the two minute hands is determined, on the one hand, by the difference between civil time and solar time, and on the other hand, by the position occupied by the minute hand of the civil time at the precise moment when the blocking means blocked the barrel.
  • the minute hand of the civil time occupies a very precise position at the moment of blocking, so that the angular difference between the two needles corresponds well to the shift between civil time and solar time.
  • the adjustment Periodic offset of the angular offset between the minute hand of the solar time and the minute hand of the civil time must be done at a very precise minute and can be done only once an hour at most. In other words, the period between two consecutive adjustments must correspond to a whole number of hours.
  • the watch movement of the present invention preferably comprises a perpetual calendar mechanism or another type of calendar mechanism with date and month indication. Note, however, that the present invention is not limited to movements with a calendar.
  • the watch movement of this example includes a calendar mechanism.
  • a calendar mechanism In what follows, we will not describe the watch movement in its entirety but only the equation mechanism of walking time.
  • Concerning the calendar suffice to specify that the indication of the date is implemented in a known manner thanks to a mobile of 31 driven at a rate of one turn per month, and that the mobile of 31 drives itself, by the intermediate gear a gear ratio 1/12, a time equation cam 101 provided to perform a complete revolution in one year.
  • the radius of the equation of time cam expresses at each point of its circumference the value of the difference between the civil time and the true solar time for a given day of the year.
  • the walking time equation device also comprises a pivoted lever 103.
  • This lever is subjected to a return action of a spring (not shown) tending to apply the probe 104 forming the distal end of the lever. against the periphery of the time equation cam 101.
  • the pivoted lever 103 is rotationally integral with a first gear sector 105 which constitutes the first element of a gear wheel actuated by the time equation cam 101.
  • first gear sector, the gear train comprises a toothed wheel 111 pivotally mounted concentrically to the switch of the movement, and a first mobile 107, formed of a pinion and a toothed sector, and a second mobile 109 also formed of a pinion and a toothed sector.
  • the first and the second movable are interposed between the first gear sector and the gear wheel 111.
  • the first gear sector 105 meshes with the pinion of the first mobile 107
  • the toothed sector of the first mobile meshes with the pinion of the second mobile 109
  • the toothed sector of the second mobile meshes with the toothed wheel 111.
  • the gear ratio of the gear is chosen according to dimensions of the equation of time cam 101, so that a one-minute variation of the equation of time ultimately results in a 6 ° degree rotation of the toothed wheel 111. It will therefore be understood that in particular that the angular position of the wheel 111 is representative of the difference between the civil time and the solar time.
  • the movement further comprises a mobile 125 whose axis 126 carries the minute hand of the civil time (not shown).
  • the mobile 125 will be called hereinafter "the false floor”.
  • the walking time equation device further comprises a gun 113 freely fitted on the axis 126 and carrying the minute hand of the solar time (not shown).
  • a locking clamp 121 surrounds the barrel 113. This clamp is articulated on a pivot 122 which is fixed in an eccentric position on the board of the false floor 125.
  • a double spring 120 recalls the jaws of the clamp blocking against the outside of the barrel 113.
  • a small lever T-shaped 124 is pivoted at the base of the T on the board of the false floor 125.
  • the small lever 124 is arranged so that a force exerted on a first end 126 of the bar of the T causes the other end 128 to be inserted between the jaws of the clamp 121 and serve as a wedge to spread them.
  • the barrel 113 is integral with the false floor 125 which drives it in rotation.
  • the walking time equation device further comprises a core 119 which is driven on the barrel 113 and a time equation lever 115 whose end is biased against the periphery of the core by a spring 123.
  • a radial arm referenced 112 is fixed on the toothed wheel 111. It can be seen on the figure 2 that the arm 112 extends first radially beyond the teeth of the false floor 125, to then curve upwards and end approximately opposite the heart 119. The end of the arm 112 form a small off-center support 116, and it will be understood that the function of the toothed wheel 111 with its arm 112 is that of a rotating frame.
  • the small support 116 serves both anchor point for the spring 123 and pivot point for the time equation lever 115.
  • the time equation lever 115 carries at its end a roller 117 and that this roll is pressed against the periphery of the heart 119 by the spring 123.
  • the force exerted by the roller 117 on the heart comprises a tangential component which tends to return the heart towards its angular position of stable equilibrium, or in other words, towards the position where the roll is in the tick of the heart.
  • the walking time equation device further includes a motion driven triggering device which will be described in detail later.
  • the trigger device is arranged to press the end 126 of the small lever 124 once every 3 hours.
  • the triggering device thus forces the jaws of the locking clamp 121 to open and to open. releasing their pressure on the barrel 113. Released by the clamp, the barrel pivots driven by the heart until the roller 117 stops in the tick of the heart.
  • the position occupied by the minute hand of the solar time at this precise moment depends on the angular position of the frame 111 and therefore of that of the equation cam of the time 101.
  • the device of triggering stops pressing the control lever 124 and the jaws of the clamp 121 are closed on the barrel 113 freezing for the next 3 hours the angle between the two minute hands.
  • the angle between the two minute hands at the instant when the clamp 121 closes on the barrel 113 is determined, on the one hand, by the position of the equation cam of the time, and on the other hand, by the position occupied by the minute hand of the civil time at this moment.
  • the position occupied by the minute hand of the civil time, at the instant when the locking means are closed again, is therefore critical for the walking time equation device operation of the present invention.
  • the trigger device comprises a trailing wheel 205, a finger 213 ( figure 3 ) mounted idly on the axis of the trailing wheel, an eccentric 207 ( figure 4 ) which is also mounted idly on the axis of the trailing wheel, but on the opposite side with respect to the finger, a lever 217 carrying a wheel 219 ( Figures 5 and 6 ), a spring (not shown) arranged to bias the wheel of the lever against the periphery of the eccentric, and finally a rocker 209.
  • the drag wheel 205 is driven by the timer of the motion (not shown) at the substantially constant rate of one revolution every 3 hours.
  • the trailing wheel will henceforth be called “the 3-hour wheel”.
  • this wheel could be driven at a different speed. Indeed, for the device to work properly, it is sufficient that it performs exactly one revolution in N hours, the parameter "N" can be any integer greater than or equal to 1. It will be understood further that the driveline that drives the trailing wheel does not necessarily go through the timer.
  • the shape of the eccentric 207 is doubly asymmetrical.
  • the distance separating its periphery from its center of rotation is not constant, and on the other hand, it is also observed that the vertex of the curve (that is to say the point the farther from the center of rotation) is not situated opposite the birth of the curve (that is, from the point closest to the center of rotation).
  • the radius leading to the top of the curve (referenced u) and the radius leading to the birth of the curve (referenced v) thus share the area enclosed by the curve in two unequal sectors. The largest of these areas will be referred to hereafter as the low tilt sector 223, and the smaller one will be called the high tilt sector 225.
  • the board of the 3 o'clock wheel 205 is pierced with an oblong 206 which defines an arc of a circle, and that the eccentric 207 carries a pin 215 which is arranged to slide in this oblong.
  • the presence of the oblong allows the eccentric to pivot relative to the 3-hour wheel within a sector whose extent is limited by the two ends of the oblong.
  • the pin 215 is shown bearing against one end of the oblong 206.
  • the 3 hour wheel 205 drives the eccentric 207 in rotation through the pin.
  • the rotation of the eccentric further constrains the wheel 219 to roll on the periphery of the latter.
  • the direction of rotation of the wheel 3 hours is such that the wheel rises along the curve, away from the center of rotation, when it crosses the low inclination sector 223, and goes down again, recalled by the spring (not shown) in the direction of the center of rotation, as it passes through the sector with a high inclination 225.
  • the length of the pin 215 is such that its end protrudes from the oblong 206, so that it can push the finger 213.
  • the finger 213 is shown bearing against the pin.
  • the eccentric 207 drives the finger 213 in rotation through the pin.
  • the triggering device is arranged so that the finger meets the rocker approximately at the moment when the wheel 219 begins to roll down the inclined periphery of the eccentric.
  • the spring will preferably be arranged to exert as strong a thrust as possible, so that the pivoting movement of the eccentric and the finger is very fast.
  • the triggering device which has just been described is of the so-called “instantaneous" type. Indeed, the duration of the period during which the triggering means press on the lever 124 is not determined by the speed of rotation of the trailing wheel, but by a double trigger involving first the strong spring of the lever 217 and then the double spring (120). On the other hand, as explained above, the triggering device also determines when the blocking means release the barrel 113 and when they block it again. The revolutions of the trailing wheel 205 taking exactly 3 hours, the position of the minute hand of the civil time at the moment when the locking means are actuated is always the same.
  • the equation device of the walking time is preferably arranged so that the minute hand of the civil time occupies the position "12 o'clock at the moment when the locking means again block the barrel after having left it free for a few moments .
  • the choice of the position "12 o'clock", or any other particular position given does not imply any technical difficulty, since at the editing, the two minute hands and the heart 119 can be hunted in any angular position on their axis (referenced 113 and 126).
  • the triggering device need not be of the instantaneous type, but could be of the trailing type.
  • a finger 213 could for example rotate integrally with the trailing wheel 205.
  • the length of the finger would be determined so that the trajectory of the finger intersects once per turn that of the first end 126 of the trigger lever 124.
  • the shape of the end of the finger and that of the lever 124 would then be advantageously designed so that after being in contact, the finger and the lever separates at once, without transition.

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

Abstract

The movement has a pivoting wheel set comprising a projecting portion i.e. finger (213), which is freely rotated coaxially to a trailing wheel (205). The projecting portion is arranged to move an element i.e. small T-shaped lever, of a mechanism temporarily away from an initial position against return force that allows the element to return to the position. The pivoting wheel set is freely rotated at a limited angle relative to an eccentric so as to allow the portion to move out of the element via the pivoting of the wheel set when the element is returned to the position by the force.

Description

DOMAINE DE L'INVENTIONFIELD OF THE INVENTION

La présente invention concerne un mouvement pour pièce d'horlogerie à complication prévu pour entraîner en rotation une aiguille des heures et une aiguilles des minutes du temps civil et comportant un dispositif à équation du temps marchante prévu pour entraîner une aiguille des minutes du temps solaire en rotation coaxialement aux aiguilles des minutes et des heures du temps civil.The present invention relates to a movement for a complicated timepiece intended to rotate a minute hand and a minute hands of the civil time and comprising a device with a walking time equation intended to drive a minute hand of the solar time. rotation coaxially with the hands of the minutes and the hours of the civil time.

Comme on le sait, il existe un écart entre le temps solaire vrai qui correspond à la durée qui s'écoule entre deux passages supérieurs consécutifs du Soleil au méridien du même lieu, et le temps civil qui est la moyenne, faite sur l'année, de la durée de tous les jours solaires vrais. Cette différence entre le temps civil et le temps solaire vrai atteint +14min. 22 s. le 11 février, -16 min. 23 s. le 4 novembre, et s'annule le 15 avril, le 13 juin, le 1er septembre et le 25 décembre. Ces valeurs varient peu d'année en année.As we know, there is a gap between the true solar time which corresponds to the duration that elapses between two consecutive superior passes of the Sun to the meridian of the same place, and the civil time which is the average, made over the year , the duration of all solar days true. This difference between the civil time and the true solar time reaches + 14min. 22 s. February 11, -16 min. 23 s. November 4, and is canceled on April 15, June 13, September 1 and December 25. These values vary little from year to year.

ART ANTERIEURPRIOR ART

Pour indiquer l'écart entre le temps civil et le temps solaire, certaines pièces d'horlogeries comportent un dispositif dit à équation du temps marchante, c'est-à-dire dont l'aiguillage comporte deux aiguilles des minutes concentriques, l'une indiquant le temps civil, et l'autre le temps solaire, l'aiguille des minutes du temps solaires étant commandée par une came d'équation du temps dont le profil est déterminé par la différence entre le temps solaire moyen et le temps vrai à un instant donné.To indicate the difference between the civil time and the solar time, certain timepieces include a so-called walking time equation device, that is to say whose switch has two concentric minute hands, one indicating the civil time, and the other the solar time, the minute hand of solar time being controlled by a time equation cam whose profile is determined by the difference between the mean solar time and the true time at a given moment.

Le document de brevet CH 689'359 , en particulier, décrit un mouvement horloger comprenant un tel dispositif à équation du temps marchante. Selon ce document, le dispositif comporte une came d'équation du temps entraînée en rotation par le mouvement à raison d'une révolution par an. Cette came coopère avec une extrémité d'une bascule, alors que l'autre extrémité de la bascule s'étend face à l'axe de rotation des aiguilles. Ainsi, lorsqu'en tournant, la came d'équation du temps fait pivoter la bascule, ce pivotement fait varier la distance entre l'extrémité libre de la bascule et l'axe des aiguilles. L'extrémité de la bascule en regard des aiguilles est munie d'un incliné agencé pour servir de secteur de came pour mettre à l'heure l'aiguille des minutes du temps solaires une fois par jour.The patent document CH 689'359 , in particular, describes a watch movement comprising such a device with a walking time equation. According to this document, the device comprises a time equation cam rotated by the movement at the rate of one revolution per year. This cam cooperates with one end of a rocker, while the other end of the rocker extends facing the axis of rotation of the needles. Thus, when turning, the equation of time cam rotates the rocker, this pivoting varies the distance between the free end of the rocker and the axis of the needles. The end of the latch facing the needles is provided with an inclined arranged to serve as a cam sector to set the hour of solar minutes time once a day.

Le dispositif à équation du temps marchante comporte encore un canon muni d'un pignon et prévu pour porter l'aiguille des minutes du temps solaire. Ce canon est monté rotatif concentriquement aux aiguilles des minutes et des heures du temps civil. Le mécanisme de correction de l'équation du temps marchante comprend encore un support solidaire en rotation de l'aiguille des minutes du temps civil. Un râteau est pivoté sur le support, et le secteur denté du râteau est arrangé pour engrener avec le pignon du canon de l'aiguille des minutes du temps solaire. A l'opposé du secteur denté, le manche du râteau porte un plot de positionnement. On comprendra que le plot de positionnement tourne autour de l'axe des aiguilles avec le support. Il tourne donc à la vitesse de l'aiguille des minutes du temps civil. Si, dans sa course, le plot de positionnement rencontre l'incliné du levier d'équation du temps, il glisse contre celui-ci. La force de réaction exercée par l'incliné sur le plot rabat ce dernier en direction de l'axe de rotation des aiguilles. Ainsi, le plot est contraint de dévier de sa trajectoire circulaire, ce qui fait pivoter le râteau. En pivotant, le râteau entraîne avec lui le pignon du canon, ce qui fait tourner le canon à friction et entraînent l'aiguille des minutes du temps solaire qui tourne ainsi dans le sens horaire. Le râteau étant pivoté sur le support, la rotation du canon s'effectue par rapport au support et donc par rapport à l'aiguille des minutes du temps civil. On comprendra de ce qui précède que c'est la distance entre le plot de positionnement et l'axe de rotation des aiguilles à l'instant où le plot arrive à l'extrémité de l'incliné, qui détermine la position exacte de l'aiguille des minutes du temps solaire.The device with equation of walking time also includes a gun provided with a pinion and designed to carry the minute hand of solar time. This gun is rotatably mounted concentrically to the hands of minutes and hours of civil time. The correction mechanism of the walking time equation further comprises a solidarity support in rotation of the minute hand of the civil time. A rake is rotated on the support, and the toothed sector of the rake is arranged to mesh with the pinion of the gun of the minute hand of solar time. In contrast to the toothed sector, the handle of the rake carries a positioning stud. It will be understood that the positioning stud rotates about the axis of the needles with the support. It turns therefore at the speed of the minute hand of the civil time. If, in its race, the positioning pin meets the slope of the equation of time lever, it slides against it. The reaction force exerted by the inclined on the pad flaps the latter in the direction of the axis of rotation of the needles. Thus, the stud is forced to deviate from its circular path, which rotates the rake. By pivoting, the rake carries with it the pinion of the barrel, which rotates the friction barrel and drives the minute hand of the solar time which thus turns in the clockwise. The rake being rotated on the support, the rotation of the barrel is carried out with respect to the support and thus with respect to the hand of the minutes of the civil time. It will be understood from the foregoing that it is the distance between the positioning pin and the axis of rotation of the needles at the instant when the pin arrives at the end of the inclined, which determines the exact position of the minute hand of solar time.

Le mécanisme qui vient d'être décrit permet uniquement la correction de la position de l'aiguille des minutes du temps solaire dans le sens horaire. C'est la raison pour laquelle, un deuxième mécanisme est prévu pour reculer l'aiguille. Ce deuxième mécanisme comporte des moyens de débrayage prévus pour débrayer le canon de l'aiguille des minutes du temps solaire. Ces moyens de débrayage sont agencés pour libérer le canon lorsqu'une force est appliquée sur un levier de commande prévu à cet effet, et pour bloquer à nouveau le canon lorsque la force cesse d'être appliquée. Le deuxième mécanisme comporte encore un dispositif de déclenchement qui est commandé par le mouvement pour appliquer une force, une fois par 24 heures, sur le levier de commande des moyens de débrayage. En réponse à cette force, les moyens de débrayage débrayent le canon des minutes du temps solaire, de sorte qu'il devient libre de tourner relativement à l'aiguille des minutes du temps civil. Précisons que l'engrènement du râteau avec le pignon du canon n'est pas affecté par ce débrayage. Le deuxième mécanisme comprend en outre un petit ressort monté sur le support et qui est arrangé pour pousser le râteau de manière à rappeler le pignon et le canon dans le sens antihoraire. Ainsi, lorsque le canon est débrayé, le petit ressort fait pivoter le râteau, écartant le plot de positionnement de l'axe de rotation des aiguilles. Le dispositif de déclenchement commandé par le mouvement est prévu pour actionner les moyens de débrayage à un instant où le plot de positionnent se trouve en regard du début de l'incliné. Ainsi, au moment où le canon est débrayé, il tourne dans le sens antihoraire jusqu'à ce que le plot de positionnement soit retenu par l'incliné contre lequel il vient buter.The mechanism just described allows only the correction of the position of the minute hand of the solar time in the clockwise direction. This is the reason why a second mechanism is provided to retract the needle. This second mechanism comprises disengaging means for disengaging the barrel of the minute hand of the solar time. These disengaging means are arranged to release the barrel when a force is applied to a control lever provided for this purpose, and to lock the barrel again when the force ceases to be applied. The second mechanism further comprises a triggering device which is controlled by the movement to apply a force, once every 24 hours, on the control lever of the disengaging means. In response to this force, the disengaging means disengage the gun of the minutes of solar time, so that it becomes free to rotate relative to the minute hand of the civil time. Note that the engagement of the rake with the pinion of the gun is not affected by this disengagement. The second mechanism further comprises a small spring mounted on the support and which is arranged to push the rake so as to bias the pinion and barrel counterclockwise. Thus, when the barrel is disengaged, the small spring rotates the rake, removing the positioning pin from the axis of rotation of the needles. The triggering device controlled by the movement is provided to actuate the disengaging means at a time when the positioning pin is facing the beginning of the inclined. Thus, when the barrel is disengaged, it rotates counterclockwise until the positioning pin is retained by the inclined against which it abuts.

On comprendra donc qu'avec le dispositif à équation du temps marchante qui vient d'être décrit, la correction de la position de l'aiguille des minutes du temps solaire se fait une fois par 24 heures en deux temps. Dans un premier temps, l'aiguille des minutes du temps solaire tourne dans le sens antihoraire jusqu'à se trouver dans une position en retard sur le temps solaire. Puis dans un deuxième temps, l'aiguille des minutes du temps solaire est ramenée dans le sens horaire jusqu'à la position déterminée par la came d'équation du temps. Ce dispositif présente certains défauts. D'une part la nécessité d'avoir un deuxième mécanisme pour reculer l'aiguille complique considérablement la construction. D'autre part, le canon de l'aiguille des minutes du temps solaire a, en tout temps, la possibilité de tourner à friction relativement à l'aiguille des minutes du temps civil. Cette possibilité peut s'avérer problématique en cas de choc. En effet, un choc, d'intensité même modérée, peut suffire à fausser l'écart entre les aiguilles du temps civil et du temps solaire. Finalement, la force du petit ressort doit être trop faible pour faire tourner le canon à friction, et au même temps, elle doit être suffisante pour le faire tourner quand il est débrayé. L'arrangement décrit implique donc certaines difficultés d'ajustement.It will therefore be understood that with the walking time equation device that has just been described, the correction of the position of the minute hand of the solar time is done once in 24 hours in two steps. At first, the minute hand of the solar time rotates counterclockwise until it is in a position lagging behind the solar time. Then, in a second step, the minute hand of the solar time is brought back clockwise to the position determined by the time equation cam. This device has some defects. On the one hand the need to have a second mechanism to retreat the needle greatly complicates the construction. On the other hand, the barrel of the minute hand of solar time has, at any time, the possibility of turning frictionally relative to the minute hand of the civil time. This possibility can be problematic in case of shock. In fact, a shock of moderate intensity can suffice to distort the gap between the hands of civil time and solar time. Finally, the force of the small spring must be too weak to rotate the friction barrel, and at the same time, it must be sufficient to turn it when it is disengaged. The described arrangement therefore involves some adjustment difficulties.

BREF EXPOSE DE L'INVENTIONBRIEF SUMMARY OF THE INVENTION

Un but de la présente invention est donc de remédier aux inconvénients de l'art antérieur qui viennent d'être décrits, et notamment de corriger l'équation du temps marchante dans le sens horaire et dans le sens antihoraire avec le même mécanisme. La présente invention atteint ce but en fournissant un mouvement pour pièce d'horlogerie comportant un dispositif à équation du temps marchante conforme à la revendication 1 annexée.An object of the present invention is therefore to overcome the drawbacks of the prior art which have just been described, and in particular to correct the equation of walking time in the clockwise direction and in the counterclockwise direction with the same mechanism. The present invention achieves this goal by providing a timepiece movement having a walking time equation device according to the appended claim 1.

Conformément à l'invention, le châssis est relié cinématiquement à la came d'équation du temps. La position angulaire du châssis est donc représentative de l'écart entre le temps civil et le temps solaire. D'autre part, le châssis porte le levier d'équation du temps, ce dernier étant rappelé contre le pourtour du coeur. Ainsi, de manière connue en soi, la force exercée par le levier sur le coeur engendre un couple qui tend à rappeler le coeur vers une position angulaire d'équilibre. Comme le levier d'équation du temps est monté sur le châssis, la position angulaire d'équilibre est liée à la position angulaire du châssis. La position du coeur à l'équilibre est donc représentative de l'écart entre le temps civil et le temps solaire.According to the invention, the frame is kinematically connected to the equation cam of time. The angular position of the chassis is therefore representative of the difference between civil time and solar time. Else on the other hand, the chassis carries the equation of time lever, the latter being recalled against the periphery of the heart. Thus, in a manner known per se, the force exerted by the lever on the heart generates a torque that tends to return the heart to an equilibrium angular position. Since the time equation lever is mounted on the frame, the equilibrium angular position is related to the angular position of the frame. The position of the heart at equilibrium is therefore representative of the difference between civil time and solar time.

Le coeur est solidaire du canon prévu pour porter l'aiguille des minutes du temps solaire. Le coeur est donc retenu par le canon tant qu'aucune force n'est exercée sur le levier de commande des moyens de blocage. Lorsqu'à un instant donné, une pression est exercée sur le levier de commande, cette pression provoque la libération du canon qui est alors libre de tourner avec le coeur. Comme on l'a vu plus haut, le coeur et le canon sont alors rappelés vers une position d'équilibre représentative de l'écart existant entre le temps civil et le temps solaire. Le coeur et le canon demeurent ensuite dans la positon d'équilibre tant que les moyens de blocage ne se sont pas refermés. Quelques instants plus tard, la pression sur le levier de commande cesse, et les moyens de blocage bloquent à nouveau le canon. À partir de cet instant, l'aiguille des minutes du temps solaire et l'aiguille des minutes du temps civil sont maintenues solidaires et tournent de concert, à la vitesse d'un tour par heure.The heart is integral with the gun designed to carry the minute hand of solar time. The heart is thus retained by the barrel as long as no force is exerted on the control lever of the locking means. When at a given moment, a pressure is exerted on the control lever, this pressure causes the release of the barrel which is then free to rotate with the heart. As we saw above, the heart and the cannon are then recalled to a position of equilibrium representative of the gap existing between civil time and solar time. The heart and the barrel then remain in the equilibrium position as long as the locking means have not closed. Moments later, the pressure on the control lever stops, and the locking means again block the barrel. From this moment, the minute hand of the solar time and the hand of the minutes of the civil time are held together and rotate in concert, at the speed of one turn per hour.

On comprendra encore que lorsque les moyens de blocage bloquent le canon, l'écart angulaire entre les deux aiguilles des minutes est déterminé, d'une part, par le décalage entre temps civil et temps solaire, et d'autre part, par la position qu'occupait l'aiguille des minutes du temps civil à l'instant précis où les moyens de blocage ont bloqué le canon. Avec ce système, il faut donc que l'aiguille des minutes du temps civil occupe une position bien précise à l'instant du blocage, pour qu'ensuite l'écart angulaire entre les deux aiguilles corresponde bien au décalage entre temps civil et temps solaire. Comme l'aiguille des minutes du temps civil est prévue pour repasser par la même position exactement une fois par heure, l'ajustement périodique du décalage angulaire entre l'aiguille des minutes du temps solaire et l'aiguille des minutes du temps civil doit être effectué à une minute bien précise et ne peut se faire qu'une fois par heure au maximum. Autrement dit, la période séparant deux ajustements consécutifs doit correspondre à un nombre entier d'heures.It will be further understood that when the blocking means block the barrel, the angular difference between the two minute hands is determined, on the one hand, by the difference between civil time and solar time, and on the other hand, by the position occupied by the minute hand of the civil time at the precise moment when the blocking means blocked the barrel. With this system, it is therefore necessary that the minute hand of the civil time occupies a very precise position at the moment of blocking, so that the angular difference between the two needles corresponds well to the shift between civil time and solar time. . As the minute hand of the civil time is scheduled to return by the same position exactly once an hour, the adjustment Periodic offset of the angular offset between the minute hand of the solar time and the minute hand of the civil time must be done at a very precise minute and can be done only once an hour at most. In other words, the period between two consecutive adjustments must correspond to a whole number of hours.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif, et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue schématique de dessus (depuis le côté ponts) d'un mode de réalisation particulier du dispositif à équation du temps marchante du mouvement pour pièce d'horlogerie à complication de la présente invention ;
  • la figure 2 est une vue partielle en perspective du dispositif à équation du temps marchante de la figure 1 ;
  • la figure 3 est une vue schématique partielle de dessus montrant le dispositif de déclenchement du mécanisme de correction du dispositif à équation du temps marchante des figures 1 et 2 ;
  • la figure 4 est une vue schématique de dessous (depuis le côté cadran) montrant le dispositif de déclenchement de la figure 3 ;
  • la figure 5 est une vue partielle agrandie de dessus montrant le dispositif de déclenchement des figures 3 et 4 dans sa configuration à l'instant qui précède le saut :
  • la figure 6 est une vue partielle semblable à celle de la figure 5 et montrant la configuration du dispositif de déclenchement pendant le saut ;
  • la figure 7 est une vue schématique agrandie de l'excentrique du dispositif de déclenchement des figure 3 à 6 dans sa configuration à l'instant qui précède le saut.
Other features and advantages of the present invention will appear on reading the following description, given solely by way of non-limiting example, and with reference to the appended drawings in which:
  • the figure 1 is a schematic view from above (from the bridge side) of a particular embodiment of the walking time equation device of the complication timepiece movement of the present invention;
  • the figure 2 is a partial perspective view of the equation device of the walking time of the figure 1 ;
  • the figure 3 is a partial schematic view from above showing the device for triggering the correction mechanism of the equation device of the walking time of figures 1 and 2 ;
  • the figure 4 is a schematic view from below (from the dial side) showing the triggering device of the figure 3 ;
  • the figure 5 is an enlarged partial view from above showing the triggering device of Figures 3 and 4 in its configuration at the instant before the jump:
  • the figure 6 is a partial view similar to that of the figure 5 and showing the configuration of the trigger device during the jump;
  • the figure 7 is an enlarged schematic view of the eccentric of the triggering device of figure 3 to 6 in its configuration at the instant before the jump.

DESCRIPTION DETAILLEE D'UN MODE DE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

Le mouvement d'horlogerie de la présente invention comporte de préférence un mécanisme de quantième perpétuel ou un autre type de mécanisme de calendrier avec indication du quantième et du mois. Précisons toutefois que la présente invention ne se limite pas aux mouvements comportant un calendrier.The watch movement of the present invention preferably comprises a perpetual calendar mechanism or another type of calendar mechanism with date and month indication. Note, however, that the present invention is not limited to movements with a calendar.

Le mouvement d'horlogerie du présent exemple comporte un mécanisme de calendrier. Toutefois, dans ce qui suit, on ne décrira pas le mouvement d'horlogerie dans sa totalité mais seulement le mécanisme à équation du temps marchante. Concernant le calendrier, suffit de préciser que l'indication du quantième est mise en oeuvre de façon connue grâce à un mobile de 31 entraîné à raison d'un tour par mois, et que le mobile de 31 entraîne lui-même, par l'intermédiaire d'un train d'engrenages de rapport 1/12, une came d'équation du temps 101 prévue pour effectuer une révolution complète en un an. De façon connue, le rayon de la came d'équation du temps exprime en chaque point de sa circonférence la valeur de l'écart entre le temps civil et le temps solaire vrai pour un jour donné de l'année.The watch movement of this example includes a calendar mechanism. However, in what follows, we will not describe the watch movement in its entirety but only the equation mechanism of walking time. Concerning the calendar, suffice to specify that the indication of the date is implemented in a known manner thanks to a mobile of 31 driven at a rate of one turn per month, and that the mobile of 31 drives itself, by the intermediate gear a gear ratio 1/12, a time equation cam 101 provided to perform a complete revolution in one year. In a known way, the radius of the equation of time cam expresses at each point of its circumference the value of the difference between the civil time and the true solar time for a given day of the year.

En se référant tout d'abord à la figure 1, on peut voir que le dispositif d'équation du temps marchante comporte également un levier pivoté 103. Ce levier est soumis à une action de rappel d'un ressort (non représenté) tendant à appliquer le palpeur 104 formant l'extrémité distale du levier contre la périphérie de la came d'équation du temps 101. Le levier pivoté 103 est solidaire en rotation d'un premier secteur denté 105 qui constitue le premier élément d'un rouage actionné par la came d'équation du temps 101. Outre le premier secteur denté, le rouage comprend une roue dentée 111 montée pivotante concentriquement à l'aiguillage du mouvement, ainsi qu'un premier mobile 107, formé d'un pignon et d'un secteur denté, et un second mobile 109 également formé d'un pignon et d'un secteur denté. Le premier et le second mobile sont intercalés entre le premier secteur denté et la roue dentée 111. Le premier secteur denté 105 engrène avec le pignon du premier mobile 107, le secteur denté du premier mobile engrène avec le pignon du second mobile 109, et enfin le secteur denté du second mobile engrène avec la roue dentée 111. Le rapport d'engrenage du rouage est choisi en fonction des dimensions de la came d'équation du temps 101, de façon à ce qu'une variation d'une minute de l'équation du temps se traduise au final par une rotation de 6° degrés de la roue dentée 111. On comprendra donc notamment que la position angulaire de la roue 111 est représentative de l'écart entre le temps civil et le temps solaire.Referring first to the figure 1 it can be seen that the walking time equation device also comprises a pivoted lever 103. This lever is subjected to a return action of a spring (not shown) tending to apply the probe 104 forming the distal end of the lever. against the periphery of the time equation cam 101. The pivoted lever 103 is rotationally integral with a first gear sector 105 which constitutes the first element of a gear wheel actuated by the time equation cam 101. first gear sector, the gear train comprises a toothed wheel 111 pivotally mounted concentrically to the switch of the movement, and a first mobile 107, formed of a pinion and a toothed sector, and a second mobile 109 also formed of a pinion and a toothed sector. The first and the second movable are interposed between the first gear sector and the gear wheel 111. The first gear sector 105 meshes with the pinion of the first mobile 107, the toothed sector of the first mobile meshes with the pinion of the second mobile 109, and finally the toothed sector of the second mobile meshes with the toothed wheel 111. The gear ratio of the gear is chosen according to dimensions of the equation of time cam 101, so that a one-minute variation of the equation of time ultimately results in a 6 ° degree rotation of the toothed wheel 111. It will therefore be understood that in particular that the angular position of the wheel 111 is representative of the difference between the civil time and the solar time.

En se référant maintenant à la figure 2, on peut voir sur la figure que le mouvement comporte encore un mobile 125 dont l'axe 126 porte l'aiguille des minutes du temps civil (non représentée). Le mobile 125 sera appelé ci-après « la fausse-chaussée ». Le dispositif d'équation du temps marchante comporte encore un canon 113 ajusté librement sur l'axe 126 et qui porte l'aiguille des minutes du temps solaire (non représentée). On peut voir encore qu'une pince de blocage 121 entoure le canon 113. Cette pince est articulée sur un pivot 122 qui est fixé en position excentrique sur la planche de la fausse-chaussée 125. Un double ressort 120 rappelle les mâchoires de la pince de blocage contre l'extérieur du canon 113. Finalement, un petit levier en forme de T 124 est pivoté au niveau de la base du T sur la planche de la fausse-chaussée 125. Le petit levier 124 est agencé de manière à ce qu'une force exercée sur une première extrémité 126 de la barre du T conduise l'autre extrémité 128 à s'insérer entre les mâchoires de la pince 121 et à servir de coin pour les écarter. On comprendra que lorsque les mâchoires de la pince de blocage 121 sont fermées, le canon 113 est solidaire de la fausse-chaussée 125 qui l'entraîne en rotation. Ainsi, l'angle que fait l'aiguille des minutes du temps solaire avec l'aiguille des minutes du temps civil ne peut pas être modifié tant qu'aucune force n'est exercée sur l'extrémité 126 du petit levier de commande 124.Referring now to the figure 2 , it can be seen in the figure that the movement further comprises a mobile 125 whose axis 126 carries the minute hand of the civil time (not shown). The mobile 125 will be called hereinafter "the false floor". The walking time equation device further comprises a gun 113 freely fitted on the axis 126 and carrying the minute hand of the solar time (not shown). It can be seen again that a locking clamp 121 surrounds the barrel 113. This clamp is articulated on a pivot 122 which is fixed in an eccentric position on the board of the false floor 125. A double spring 120 recalls the jaws of the clamp blocking against the outside of the barrel 113. Finally, a small lever T-shaped 124 is pivoted at the base of the T on the board of the false floor 125. The small lever 124 is arranged so that a force exerted on a first end 126 of the bar of the T causes the other end 128 to be inserted between the jaws of the clamp 121 and serve as a wedge to spread them. It will be understood that when the jaws of the locking clamp 121 are closed, the barrel 113 is integral with the false floor 125 which drives it in rotation. Thus, the angle made by the minute hand of the solar time with the minute hand of the civil time can not be modified as long as no force is exerted on the end 126 of the small control lever 124.

Le dispositif d'équation du temps marchante comporte encore un coeur 119 qui est chassé sur le canon 113 et un levier d'équation du temps 115 dont l'extrémité est rappelée contre le pourtour du coeur par un ressort 123. D'autre part, comme on peut le voir sur la figure 1, un bras radial référencé 112 est fixé sur la roue dentée 111. On peut voir sur la figure 2 que le bras 112 s'étend d'abord radialement jusqu'au-delà de la denture de la fausse-chaussée 125, pour s'incurver ensuite vers le haut et se terminer approximativement en regard du coeur 119. L'extrémité du bras 112 forme un petit support décentré 116, et on comprendra que la fonction de la roue dentée 111 avec son bras 112 est celle d'un châssis tournant. On peut voir encore sur la figure 2 que le petit support 116 sert tout à la fois de point d'ancrage pour le ressort 123 et de point de pivotement pour le levier d'équation du temps 115. On voit finalement que le levier d'équation du temps 115 porte à son extrémité un rouleau 117 et que ce rouleau est pressé contre le pourtour du coeur 119 par le ressort 123. De manière connue en soi, la force qu'exerce le rouleau 117 sur le coeur comporte une composante tangentielle qui tend à rappeler le coeur en direction de sa position angulaire d'équilibre stable, ou autrement dit, en direction de la position où le rouleau se trouve dans la coche du coeur.The walking time equation device further comprises a core 119 which is driven on the barrel 113 and a time equation lever 115 whose end is biased against the periphery of the core by a spring 123. On the other hand, as we can see on the figure 1 , a radial arm referenced 112 is fixed on the toothed wheel 111. It can be seen on the figure 2 that the arm 112 extends first radially beyond the teeth of the false floor 125, to then curve upwards and end approximately opposite the heart 119. The end of the arm 112 form a small off-center support 116, and it will be understood that the function of the toothed wheel 111 with its arm 112 is that of a rotating frame. We can still see on the figure 2 that the small support 116 serves both anchor point for the spring 123 and pivot point for the time equation lever 115. We finally see that the time equation lever 115 carries at its end a roller 117 and that this roll is pressed against the periphery of the heart 119 by the spring 123. In a manner known per se, the force exerted by the roller 117 on the heart comprises a tangential component which tends to return the heart towards its angular position of stable equilibrium, or in other words, towards the position where the roll is in the tick of the heart.

Le dispositif d'équation du temps marchante comporte encore un dispositif de déclenchement entraîné par le mouvement et qui sera décrit en détail plus loin.The walking time equation device further includes a motion driven triggering device which will be described in detail later.

Le fonctionnement du dispositif d'équation du temps marchante qui fait l'objet du présent exemple va maintenant être décrit. Comme on l'a vu, tant qu'aucune force n'est exercée sur le levier de commande 124, le canon 113 et le coeur 119 sont solidaires de la fausse-chaussée 125 qui les entraîne en rotation. Conformément à ce qui sera décrit plus avant, le dispositif de déclenchement est agencé pour appuyer sur l'extrémité 126 du petit levier 124 une fois toutes les 3 heures. Le dispositif de déclenchement force ainsi les mâchoires de la pince de blocage 121 à s'entrouvrir et à relâcher leur pression sur le canon 113. Libéré par la pince, le canon pivote entraîné par le coeur jusqu'à ce que le rouleau 117 s'immobilise dans la coche du coeur. On comprendra que la position qu'occupe l'aiguille des minutes du temps solaire à ce moment précis dépend de la position angulaire du châssis 111 et donc de celle de la came d'équation du temps 101. Quelques instants plus tard, le dispositif de déclenchement cesse d'appuyer sur le levier de commande 124 et les mâchoires de la pince 121 se referment sur le canon 113 figeant pour les 3 prochaines heures l'angle entre les deux aiguilles des minutes. A ce propos, on comprendra que l'angle entre les deux aiguilles des minutes à l'instant où la pince 121 se referme sur le canon 113 est déterminé, d'une part, par la position de la came d'équation du temps, et d'autre part, par la position qu'occupe l'aiguille des minutes du temps civil à cet instant. La position qu'occupe l'aiguille des minutes du temps civil, à l'instant où les moyens de blocage se referment, est donc critique pour le fonctionnement dispositif à équation du temps marchante de la présente invention.The operation of the walking time equation device which is the subject of the present example will now be described. As we have seen, as long as no force is exerted on the control lever 124, the barrel 113 and the core 119 are integral with the false floor 125 which drives them in rotation. In accordance with what will be described above, the trigger device is arranged to press the end 126 of the small lever 124 once every 3 hours. The triggering device thus forces the jaws of the locking clamp 121 to open and to open. releasing their pressure on the barrel 113. Released by the clamp, the barrel pivots driven by the heart until the roller 117 stops in the tick of the heart. It will be understood that the position occupied by the minute hand of the solar time at this precise moment depends on the angular position of the frame 111 and therefore of that of the equation cam of the time 101. A few moments later, the device of triggering stops pressing the control lever 124 and the jaws of the clamp 121 are closed on the barrel 113 freezing for the next 3 hours the angle between the two minute hands. In this regard, it will be understood that the angle between the two minute hands at the instant when the clamp 121 closes on the barrel 113 is determined, on the one hand, by the position of the equation cam of the time, and on the other hand, by the position occupied by the minute hand of the civil time at this moment. The position occupied by the minute hand of the civil time, at the instant when the locking means are closed again, is therefore critical for the walking time equation device operation of the present invention.

Le dispositif de déclenchement du mécanisme de correction de l'équation du temps marchante va maintenant être décrit en se référant aux figures 3 à 7. Comme on peut le voir sur les figures, le dispositif de déclenchement comprend une roue traînante 205, un doigt 213 (figure 3) monté fou sur l'axe de la roue traînante, un excentrique 207 (figure 4) qui est également monté fous sur l'axe de la roue traînante, mais du côté opposé par rapport au doigt, un levier 217 portant une roulette 219 (figures 5 et 6), un ressort (non représenté) agencé pour rappeler la roulette du levier contre le pourtour de l'excentrique, et enfin un culbuteur 209.The triggering device of the correction mechanism of the walking time equation will now be described with reference to the Figures 3 to 7 . As can be seen in the figures, the trigger device comprises a trailing wheel 205, a finger 213 ( figure 3 ) mounted idly on the axis of the trailing wheel, an eccentric 207 ( figure 4 ) which is also mounted idly on the axis of the trailing wheel, but on the opposite side with respect to the finger, a lever 217 carrying a wheel 219 ( Figures 5 and 6 ), a spring (not shown) arranged to bias the wheel of the lever against the periphery of the eccentric, and finally a rocker 209.

Dans le présent exemple, la roue traînante 205 est entraînée par la minuterie du mouvement (non représentée) à la vitesse sensiblement constante d'une révolution toutes les 3 heures. La roue traînante sera donc appelée ci-après « la roue de 3 heures ». On comprendra toutefois que cette roue pourrait être entraînée à une vitesse différente. En effet, pour que le dispositif fonctionne correctement, il suffit qu'elle accomplisse exactement une révolution en N heures, le paramètre « N » pouvant être tout nombre entier plus grand ou égal à 1. On comprendra d'autre part que la chaîne cinématique qui entraîne la roue traînante ne passe pas nécessairement par la minuterie.In the present example, the drag wheel 205 is driven by the timer of the motion (not shown) at the substantially constant rate of one revolution every 3 hours. The trailing wheel will henceforth be called "the 3-hour wheel". However, it will be understood that this wheel could be driven at a different speed. Indeed, for the device to work properly, it is sufficient that it performs exactly one revolution in N hours, the parameter "N" can be any integer greater than or equal to 1. It will be understood further that the driveline that drives the trailing wheel does not necessarily go through the timer.

On peut voir sur la figure 7 que la forme de l'excentrique 207 est doublement asymétrique. En effet, d'une part, la distance séparant son pourtour de son centre de rotation n'est pas constante, et d'autre part, on observe également que le sommet de la courbe (c'est-à-dire le point le plus éloigné du centre de rotation) n'est pas situé à l'opposé de la naissance de la courbe (c'est dire du point le plus proche du centre de rotation). Le rayon aboutissant au sommet de la courbe (référencé u) et le rayon aboutissant à la naissance de la courbe (référencé v) partagent donc l'aire enfermée par la courbe en deux secteurs inégaux. Le plus grand de ces secteurs sera appelé ci-après le secteur à faible inclinaison 223, et le plus petit sera appelé le secteur à forte inclinaison 225. En se référant à nouveau aux figures 3, 5 et 6, on peut voir que la planche de la roue de 3 heures 205 est percée d'un oblong 206 qui définit un arc de cercle, et que l'excentrique 207 porte une goupille 215 qui est arrangée pour coulisser dans cet oblong. La présence de l'oblong permet à l'excentrique de pivoter relativement à la roue de 3 heures à l'intérieur d'un secteur dont l'étendue est limitée par les deux extrémités de l'oblong.We can see on the figure 7 that the shape of the eccentric 207 is doubly asymmetrical. In fact, on the one hand, the distance separating its periphery from its center of rotation is not constant, and on the other hand, it is also observed that the vertex of the curve (that is to say the point the farther from the center of rotation) is not situated opposite the birth of the curve (that is, from the point closest to the center of rotation). The radius leading to the top of the curve (referenced u) and the radius leading to the birth of the curve (referenced v) thus share the area enclosed by the curve in two unequal sectors. The largest of these areas will be referred to hereafter as the low tilt sector 223, and the smaller one will be called the high tilt sector 225. Referring again to figures 3 , 5 and 6 it can be seen that the board of the 3 o'clock wheel 205 is pierced with an oblong 206 which defines an arc of a circle, and that the eccentric 207 carries a pin 215 which is arranged to slide in this oblong. The presence of the oblong allows the eccentric to pivot relative to the 3-hour wheel within a sector whose extent is limited by the two ends of the oblong.

Sur la figure 5, la goupille 215 est représentée en appui contre une extrémité de l'oblong 206. Dans cette situation, la roue de 3 heures 205 entraîne l'excentrique 207 en rotation par l'intermédiaire de la goupille. La rotation de l'excentrique contraint d'autre part la roulette 219 à rouler sur le pourtour de ce dernier. De plus, le sens de rotation de la roue de 3 heures est tel que la roulette s'élève le long de la courbe, s'éloignant du centre de rotation, lorsqu'elle traverse le secteur à faible inclinaison 223, et redescend, rappelée par le ressort (non représenté) en direction du centre de rotation, lorsqu'elle traverse le secteur à forte inclinaison 225. Lorsque la roulette et le levier 217 traverse ainsi le secteur à forte inclinaison, la force exercée par le ressort sur le pourtour incliné de l'excentrique 207 a pour effet d'entraîner l'excentrique dans le même sens que la force motrice du rouage. L'excentrique étant libre de pivoter relativement à la roue de 3 heures, la roulette 219 dévale rapidement l'incliné du sommet jusqu'à la naissance de la courbe, provoquant un soudain pivotement de l'excentrique et de la goupille 215 dans le sens de la marche. La chute de la roulette se termine lorsqu'elle vient s'immobiliser à la naissance de la courbe (dans la position représentée dans la figure 6).On the figure 5 , the pin 215 is shown bearing against one end of the oblong 206. In this situation, the 3 hour wheel 205 drives the eccentric 207 in rotation through the pin. The rotation of the eccentric further constrains the wheel 219 to roll on the periphery of the latter. In addition, the direction of rotation of the wheel 3 hours is such that the wheel rises along the curve, away from the center of rotation, when it crosses the low inclination sector 223, and goes down again, recalled by the spring (not shown) in the direction of the center of rotation, as it passes through the sector with a high inclination 225. When the wheel and the lever 217 thus crosses the sector with high inclination, the force exerted by the spring on the inclined periphery of the eccentric 207 has the effect of driving the eccentric in the same direction as the driving force of the gear train. Since the eccentric is free to pivot relative to the 3-hour wheel, the roller 219 rapidly rises the inclined edge of the crown until the curve is born, causing the eccentric and the pin 215 to pivot in the opposite direction. a walk. The fall of the wheel ends when it comes to rest at the birth of the curve (in the position represented in the figure 6 ).

La longueur de la goupille 215 est telle que son extrémité dépasse de l'oblong 206, de sorte qu'elle peut pousser le doigt 213. Sur la figure 5, le doigt 213 est représenté en appui contre la goupille. Dans cette situation, l'excentrique 207 entraîne le doigt 213 en rotation par l'intermédiaire de la goupille. Une fois par tour de la roue de 3 heures 205, le doigt rencontre le culbuteur 209 et soulève ce dernier. Le dispositif de déclenchement est agencé de manière à ce que le doigt rencontre le culbuteur approximativement à l'instant où la roulette 219 commence à dévaler le pourtour incliné de l'excentrique. Ainsi, poussé par le levier 217, le doigt pivote violement, soulevant le culbuteur 209 et glissant rapidement contre sa face concave, jusqu'à ce que le doigt ait dépassé le point de soulèvement maximum du culbuteur (comme représenté à la figure 6). Le ressort sera de préférence agencé pour exercer une poussée aussi forte que possible, de manière à ce que le mouvement de pivotement de l'excentrique et du doigt soit très rapide.The length of the pin 215 is such that its end protrudes from the oblong 206, so that it can push the finger 213. On the figure 5 the finger 213 is shown bearing against the pin. In this situation, the eccentric 207 drives the finger 213 in rotation through the pin. Once per turn of the wheel of 3 hours 205, the finger meets the rocker 209 and raises the latter. The triggering device is arranged so that the finger meets the rocker approximately at the moment when the wheel 219 begins to roll down the inclined periphery of the eccentric. Thus, pushed by the lever 217, the finger pivots violently, lifting the rocker 209 and sliding rapidly against its concave face, until the finger has exceeded the maximum lifting point of the rocker arm (as shown in FIG. figure 6 ). The spring will preferably be arranged to exert as strong a thrust as possible, so that the pivoting movement of the eccentric and the finger is very fast.

Comme on peut encore le voir sur les figures, lorsque le culbuteur 209 est soulevé par le doigt 213, le dos du culbuteur vient presser contre l'extrémité 126 du petit levier de commande 124 avec suffisamment de force pour faire s'entrouvrir les mâchoires de la pince de blocage 121 et pour libérer le canon 113. Pour entrouvrir les mâchoires de la pince de blocage, le culbuteur doit contraindre le double ressort 120, et on comprendra que, par réaction, le culbuteur est alors lui-même rappelé contre le doigt 213 par le double ressort (120). Cette force de réaction est sans effet tant que le doigt est poussé par la goupille 215 et que le point de soulèvement maximum du culbuteur n'est pas atteint. En revanche, dès que le doigt dépasse le point de soulèvement maximum du culbuteur (figure 6), la composante tangentielle de la force de réaction exercée par le culbuteur sur le doigt s'oriente dans le sens de la rotation. Le doigt étant alors libre de tourner relativement à l'excentrique et à la roue de 3 heures, le culbuteur retombe en éjectant le doigt. La pression du culbuteur sur le levier de commande s'interrompt donc soudainement, permettant à la pince de blocage d'immobiliser le canon à un instant bien précis.As can still be seen in the figures, when the rocker 209 is lifted by the finger 213, the back of the rocker arm is pressed against the end 126 of the small control lever 124 with sufficient force to open the jaws of the blocking clamp 121 and to release the barrel 113. To open the jaws of the locking clamp, the rocker must constrain the double spring 120, and it will be understood that, by reaction, the rocker is then itself recalled against the finger 213 by the double spring (120). This reaction force is no effect as long as the finger is pushed by the pin 215 and the maximum lifting point of the rocker arm is not reached. On the other hand, as soon as the finger exceeds the maximum lifting point of the rocker arm ( figure 6 ), the tangential component of the reaction force exerted by the rocker arm on the finger is oriented in the direction of rotation. The finger then being free to rotate relative to the eccentric and the wheel of 3 hours, the rocker falls by ejecting the finger. The pressure of the rocker arm on the control lever suddenly stops, allowing the locking clamp to immobilize the barrel at a specific time.

L'homme du métier appréciera que le dispositif de déclenchement qui vient d'être décrit est du type dit « instantané ». En effet, la durée de la période durant laquelle les moyens de déclenchement appuient sur le levier 124 n'est pas déterminée par la vitesse de rotation de la roue traînante, mais par une double détente faisant intervenir d'abord le puissant ressort de rappel du levier 217 et ensuite le double ressort (120). D'autre part, comme expliqué plus haut, le dispositif de déclenchement détermine également à quel moment les moyens de blocage libèrent le canon 113 et à quel moment ils le bloquent à nouveau. Les révolutions de la roue traînante 205 prenant exactement 3 heures, la position de l'aiguille des minutes du temps civil à l'instant où les moyens de blocage sont actionnés est toujours la même. On agence de préférence le dispositif d'équation du temps marchante pour que l'aiguille des minutes du temps civil occupe la position « 12 heures à l'instant où les moyens de blocage bloquent à nouveau le canon après l'avoir laissé libre quelques instants. A noter que le choix de la position « 12 heures », ou de toute autre position particulière donnée, n'implique aucune difficulté technique, puisqu'au montage, les deux aiguilles des minutes et le coeur 119 peuvent être chassés dans n'importe quelle position angulaire sur leur axe (référencés 113 et 126).Those skilled in the art will appreciate that the triggering device which has just been described is of the so-called "instantaneous" type. Indeed, the duration of the period during which the triggering means press on the lever 124 is not determined by the speed of rotation of the trailing wheel, but by a double trigger involving first the strong spring of the lever 217 and then the double spring (120). On the other hand, as explained above, the triggering device also determines when the blocking means release the barrel 113 and when they block it again. The revolutions of the trailing wheel 205 taking exactly 3 hours, the position of the minute hand of the civil time at the moment when the locking means are actuated is always the same. The equation device of the walking time is preferably arranged so that the minute hand of the civil time occupies the position "12 o'clock at the moment when the locking means again block the barrel after having left it free for a few moments . Note that the choice of the position "12 o'clock", or any other particular position given, does not imply any technical difficulty, since at the editing, the two minute hands and the heart 119 can be hunted in any angular position on their axis (referenced 113 and 126).

On comprendra en outre que diverses modifications et/ou améliorations évidentes pour un homme du métier peuvent être apportées au mode de réalisation qui fait l'objet de la présente description sans sortir du cadre de la présente invention définie par les revendications annexées. En particulier, le dispositif de déclenchement n'a pas besoin d'être du type instantané, mais pourrait être du type traînant. Dans ce cas, un doigt 213 pourrait par exemple tourner solidairement avec la roue traînante 205. La longueur du doigt serait déterminée de manière à ce que la trajectoire du doigt intersecte une fois par tour celle de la première extrémité 126 du levier de déclenchement 124. La forme de l'extrémité du doigt et de celle du levier 124 serait alors avantageusement conçue pour qu'après être rentrés en contact, le doigt et le levier se sépare d'un seul coup, sans transition.It will be further understood that various modifications and / or improvements obvious to a person skilled in the art can be made to the embodiment which is the subject of the present description without departing within the scope of the present invention defined by the appended claims. In particular, the triggering device need not be of the instantaneous type, but could be of the trailing type. In this case, a finger 213 could for example rotate integrally with the trailing wheel 205. The length of the finger would be determined so that the trajectory of the finger intersects once per turn that of the first end 126 of the trigger lever 124. The shape of the end of the finger and that of the lever 124 would then be advantageously designed so that after being in contact, the finger and the lever separates at once, without transition.

Claims (9)

Mouvement pour pièce d'horlogerie à complication prévu pour entraîner en rotation une aiguille des heures et une aiguilles des minutes du temps civil et comportant un dispositif d'équation du temps marchante comprenant un canon (113) monté rotatif concentriquement aux aiguilles des minutes et des heures du temps civil et prévu pour porter une aiguille des minutes du temps solaire, le dispositif d'équation du temps comprenant une came d'équation du temps (101) entraînée en rotation par le mouvement à raison d'une révolution par an, et un mécanisme de correction prévu pour ajuster périodiquement le décalage angulaire de l'aiguille des minutes du temps solaire par rapport à l'aiguille des minutes du temps civil, en fonction de la position angulaire de la came d'équation du temps, le mécanisme de correction comprenant : - des moyens de blocage (120, 121, 124) comportant un levier de commande (124) et prévus pour solidariser ledit canon (113) et l'aiguille des minutes du temps civil, lesdits moyens de blocage étant agencés pour libérer ledit canon lorsqu'une force est appliquée sur ledit levier de commande et pour bloquer à nouveau ledit canon lorsque ladite force cesse d'être appliquée ; - un dispositif de déclenchement (205, 207, 209, 213) entraîné par le mouvement et prévu pour appliquer périodiquement une force sur ledit levier de commande (124) à un intervalle régulier correspondant à un nombre entier d'heures ; caractérisé en ce que le mécanisme de correction comprend en outre: - un coeur (119) solidaire du dit canon (113), et un levier d'équation du temps (115) prévu pour coopérer avec le coeur ; - une liaison cinématique (103, 104, 105, 107, 109) reliant le profil de la came d'équation du temps (101) à un châssis (111, 112) pivoté concentriquement aux axes des aiguilles, le levier d'équation du temps (115) étant monté pivotant sur le châssis en position décentrée, un ressort (123) étant encore arrangé sur le châssis de manière à rappeler une extrémité libre du levier d'équation du temps contre le coeur. A complicated timepiece movement intended to rotate a minute hand and a minute hand of the civilian time and comprising a walking time equation device comprising a gun (113) mounted concentrically rotatable to the minute hands and hours of civil time and intended to carry a minute hand of solar time, the time equation device including a time equation cam (101) rotated by the movement at a rate of one revolution per year, and a correction mechanism provided for periodically adjusting the angular offset of the minute hand of the solar time relative to the minute hand of the civil time, as a function of the angular position of the time equation cam; correction comprising: - Locking means (120, 121, 124) comprising a control lever (124) and provided for securing said barrel (113) and the minute hand of the civil time, said locking means being arranged to release said barrel when a force is applied to said control lever and to re-lock said barrel when said force ceases to be applied; a motion driven triggering device (205, 207, 209, 213) for periodically applying a force to said control lever (124) at a regular interval corresponding to a whole number of hours; characterized in that the correction mechanism further comprises: - a heart (119) integral with said barrel (113), and a time equation lever (115) provided to cooperate with the heart; a kinematic connection (103, 104, 105, 107, 109) connecting the profile of the equation of time cam (101) to a frame (111, 112) concentrically pivoted to the axes of the needles, the equation lever of the time (115) being pivotally mounted on the frame in an off-center position, a spring (123) being further arranged on the frame so as to recall a free end of the time equation lever against the heart. Mouvement pour pièce d'horlogerie selon la revendication 1, caractérisé en ce que les moyens de blocage (120, 121, 124) comportent une pince de blocage (121) solidaire de l'aiguille des minutes du temps civil, la pince de blocage étant associée, d'une part, à un ressort (120) agencé pour faire se refermer la pince autour du dit canon (113) pour le solidariser de l'aiguille des minutes du temps civil, et associée d'autre part, au dit levier de commande (124), le levier de commande étant agencé pour faire s'ouvrir la pince lorsqu'une force est appliquée sur le levier de commande.Movement for a timepiece according to claim 1, characterized in that the locking means (120, 121, 124) comprise a locking clip (121) integral with the minute hand of the civil time, the locking clip being associated, on the one hand, with a spring (120) arranged to close the clamp around said barrel (113) to secure it to the minute hand of the civil time, and associated on the other hand, to said lever control (124), the control lever being arranged to open the clamp when a force is applied to the control lever. Mouvement pour pièce d'horlogerie selon la revendication 1 ou 2, caractérisé en ce que ladite liaison cinématique (103, 104, 105, 107, 109) entre la came d'équation du temps (101) et le châssis (111, 112) comporte un râteau (103, 104, 105) dont le manche (104) est agencé pour coopérer avec le profil de ladite came, et un train d'engrenages (107, 109) reliant le secteur denté (105) du râteau à une denture solidaire du châssis, ladite denture étant concentrique à l'axe des aiguilles.Movement for a timepiece according to claim 1 or 2, characterized in that said kinematic connection (103, 104, 105, 107, 109) between the time equation cam (101) and the frame (111, 112) comprises a rake (103, 104, 105) whose handle (104) is arranged to cooperate with the profile of said cam, and a gear train (107, 109) connecting the toothed sector (105) of the rake to a toothing secured to the frame, said toothing being concentric with the axis of the needles. Mouvement pour pièce d'horlogerie selon l'une des revendications 1, 2 ou 3, caractérisé en ce que le levier d'équation du temps (115) comporte à son extrémité un rouleau (117) rappelé contre le coeur (119) et agencé pour rouler contre le profil du coeur.Movement for a timepiece according to one of claims 1, 2 or 3, characterized in that the time equation lever (115) comprises at its end a roller (117) pressed against the core (119) and arranged to roll against the profile of the heart. Mouvement pour pièce d'horlogerie selon l'une des revendications précédentes, caractérisé en ce que ledit dispositif de déclenchement (205, 207, 209, 213) est actionné par une roue traînante (205) entraînée par le mouvement au rythme d'une révolution toutes les N heures, N étant un nombre entier positif.Movement for a timepiece according to one of the preceding claims, characterized in that said triggering device (205, 207, 209, 213) is actuated by a trailing wheel (205) driven by the movement at the rate of a revolution every N hours, N being a positive integer. Mouvement pour pièce d'horlogerie selon la revendication 5, caractérisé en ce que ledit dispositif de déclenchement (205, 207, 209, 213) comporte un doigt (213) entraîné par la roue traînante (205) et prévu pour actionner ledit levier de commande (124).Movement for a timepiece according to claim 5, characterized in that said triggering device (205, 207, 209, 213) comprises a finger (213) driven by the trailing wheel (205) and designed to actuate said control lever (124). Mouvement pour pièce d'horlogerie selon la revendication 6, caractérisé en ce que ledit dispositif de déclenchement (205, 207, 209, 213) comporte un excentrique (207) entraîné par la roue traînante (205) par l'intermédiaire d'une goupille (215) agencée pour coulisser dans un oblong (206), et une roulette (219) rappelée par un ressort contre le pourtour de l'excentrique, et en ce que la roue traînante entraîne le doigt (213) par l'intermédiaire de l'excentrique.Movement for a timepiece according to claim 6, characterized in that said triggering device (205, 207, 209, 213) comprises an eccentric (207) driven by the trailing wheel (205) by means of a pin (215) arranged to slide in an oblong (206), and a wheel (219) biased by a spring against the periphery of the eccentric, and in that the trailing wheel drives the finger (213) via the eccentric. Mouvement pour pièce d'horlogerie selon la revendication 6 ou 7, caractérisé en ce que le doigt (213) actionne le levier de commande (124) par l'intermédiaire d'un culbuteur (209).Movement for timepiece according to claim 6 or 7, characterized in that the finger (213) actuates the control lever (124) via a rocker arm (209). Mouvement pour pièce d'horlogerie selon l'une des revendications 5 à 8, caractérisé en ce que la roue traînante (205) est entraînée par la minuterie du mouvement au rythme d'une révolution toutes les 3 heures.Movement for timepiece according to one of claims 5 to 8, characterized in that the trailing wheel (205) is driven by the timer of the movement at the rate of one revolution every 3 hours.
EP11159387.7A 2011-03-23 2011-03-23 Uhrwerk, das eine Vorrichtung mit fortschreitender Zeitgleichung umfasst Active EP2503412B1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
EP11159387.7A EP2503412B1 (en) 2011-03-23 2011-03-23 Uhrwerk, das eine Vorrichtung mit fortschreitender Zeitgleichung umfasst
EP12160160.3A EP2503407B1 (en) 2011-03-23 2012-03-19 Timepiece movement comprising an instant actuator controlled by the movement
US13/424,528 US8588031B2 (en) 2011-03-23 2012-03-20 Timepiece movement comprising a running equation of time device
US13/426,303 US8953415B2 (en) 2011-03-23 2012-03-21 Timepiece movement including an instantaneous actuator controlled by the movement
CN201210077616.XA CN102692862B (en) 2011-03-23 2012-03-22 Timepiece movement comprising a device with running time equation
RU2012111046/28A RU2012111046A (en) 2011-03-23 2012-03-22 CHRONOMETER MECHANISM WITH ACTIVE TIME EQUATION DEVICE
JP2012066697A JP2012202996A (en) 2011-03-23 2012-03-23 Watch movement including actuation equation-of-time device
CN201210080564.1A CN102692865B (en) 2011-03-23 2012-03-23 Timepiece movement comprising an instant actuator controlled by the movement
JP2012066703A JP5346103B2 (en) 2011-03-23 2012-03-23 Clock movement including instantaneous actuator controlled by movement
HK13103483.3A HK1176415A1 (en) 2011-03-23 2013-03-20 Timepiece movement comprising a running equation of time device
HK13103603.8A HK1177003A1 (en) 2011-03-23 2013-03-22 Timepiece movement including an instantaneous actuator controlled by the movement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11159387.7A EP2503412B1 (en) 2011-03-23 2011-03-23 Uhrwerk, das eine Vorrichtung mit fortschreitender Zeitgleichung umfasst

Publications (2)

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EP2503412A1 true EP2503412A1 (en) 2012-09-26
EP2503412B1 EP2503412B1 (en) 2013-08-28

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US (1) US8588031B2 (en)
EP (1) EP2503412B1 (en)
JP (1) JP2012202996A (en)
CN (1) CN102692862B (en)
HK (1) HK1176415A1 (en)
RU (1) RU2012111046A (en)

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EP3640747A1 (en) * 2016-07-15 2020-04-22 Montres Breguet S.A. Running time equation mechanism controlled by a differential device
JP6881186B2 (en) * 2017-09-25 2021-06-02 セイコーエプソン株式会社 Watch movements and watches
EP3540524B1 (en) * 2018-03-13 2022-02-16 Montres Breguet S.A. Governed jumping display mechanism in a timepiece
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US20120243380A1 (en) 2012-09-27
CN102692862A (en) 2012-09-26
HK1176415A1 (en) 2013-07-26
JP2012202996A (en) 2012-10-22
US8588031B2 (en) 2013-11-19
EP2503412B1 (en) 2013-08-28
CN102692862B (en) 2015-02-25
RU2012111046A (en) 2013-09-27

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