EP1978424B1 - Chronograph - Google Patents

Chronograph Download PDF

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Publication number
EP1978424B1
EP1978424B1 EP20070405107 EP07405107A EP1978424B1 EP 1978424 B1 EP1978424 B1 EP 1978424B1 EP 20070405107 EP20070405107 EP 20070405107 EP 07405107 A EP07405107 A EP 07405107A EP 1978424 B1 EP1978424 B1 EP 1978424B1
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EP
European Patent Office
Prior art keywords
drivetrain
chronograph
wheel
last runner
runner
Prior art date
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Application number
EP20070405107
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English (en)
French (fr)
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EP1978424A1 (de
Inventor
François-Paul JOURNE
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 Journe SA
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Montres Journe SA
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Publication date
Application filed by Montres Journe SA filed Critical Montres Journe SA
Priority to EP20070405107 priority Critical patent/EP1978424B1/de
Publication of EP1978424A1 publication Critical patent/EP1978424A1/de
Application granted granted Critical
Publication of EP1978424B1 publication Critical patent/EP1978424B1/de
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph

Definitions

  • the present invention relates to a chronograph comprising a first kinematic chain between a motor spring and an escapement associated with the regulating system, and a second kinematic chain of which a mobile of a first end is in selective desmodromic connection with the first kinematic chain by intermediate of a clutch device.
  • the chronograph mechanisms such as those described in The Chronograph, its operation, its repair by B. Humbert Edition of the Swiss Journal of Watchmaking and Jewelry Scriptar SA Lausanne (1952), are selectively connected to the finishing gear of a workpiece. watchmaking, usually at the seconds wheel, so that the chronograph hand does one lap per minute and at each turn, drives a mobile one minute counter.
  • this cog is not powered.
  • the number of teeth of the chronograph wheel has been multiplied, these teeth being triangular and a slight braking spring has also been added.
  • the chronograph mechanism is mounted as a bypass on the finishing train and comprises, at its pto end connected to the finishing train, a clutch device and a locking device, working in synchronization and, in the vicinity of its terminal end, at least one braking device, all so that, during the disengagement which isolates from the gear train the entire chronograph mechanism, the chronograph wheel is retained at both ends by the locking and braking devices, preventing any gear flutter.
  • the relatively small diameter of the dial which is between 25 and 40mm and secondly, the frequency of the pendulum which is generally 21,600 vibrations / hour or of 18,000 vibrations / hour
  • the smallest division of time that can be measured with such a mechanism and such a dial diameter is limited in practice to 0.16s or 0.2s, corresponding to an angle of 1 ° or 1 ° 12 ', which corresponds to the movement of the second chronograph hand, by successive jumps in the value of one of these angles.
  • the measurement of the smallest interval is therefore dependent on the frequency with which the balance oscillates and actuates the escape at each alternation (half-oscillation). So even a reduction in the rotation of the second chronograph wheel would depend on the frequency of the oscillator which allows the rotation of the gear train only by successive jumps. In addition, a smaller time interval would not be readable on a scale of this diameter.
  • the present invention aims to remedy at least in part the aforementioned drawbacks, so as to remove the energy withdrawal of the chronograph train on the gear train.
  • the object of the invention is also to very significantly reduce the smallest measurable time interval, even in the case of a wristwatch chronograph.
  • the subject of the present invention is a chronograph as defined by claim 1.
  • the chronograph wheel is then regulated by an escape wheel which controls the speed of rotation of the chronograph train driven directly by a mainspring as the finishing gear.
  • this drive mode offers the possibility of being able to very substantially increase the measurement range, thanks to a mobile which performs a rotation per second, which allows without difficulty to measure the hundredth of a second.
  • the cylinder 1 is at the center of the movement of the timepiece.
  • the outer end of the spring 6 of the barrel 1 is integral with the barrel drum provided with teeth 1a which leads, as usual, the first mobile (not shown) of the work train, while the inner end of the spring 6 is integral with the shaft 1d of the barrel 1 as usual.
  • the shaft of the barrel 1 is integral with a winding wheel 8 which, unlike the traditional ratchet, is not associated with a ratchet and can therefore rotate in both directions.
  • the toothed lid 1b of the barrel 1 is pivotally mounted on a cylindrical portion 1c of the shaft 1d of this barrel 1 ( figure 5 ) and meshes with the first mobile 4a of the kinematic chain of the chronograph train 4.
  • This toothed lid 1b is connected to a portion of square section 1e of the barrel shaft 1d by a ratchet drive wheel 15 secured to the barrel shaft with the square section portion 1c and the ratchet gear is engaged with two pawls 16 ( figure 4 ), pressed into this toothing ratchet by two leaf springs 17a integral with a ring 17.
  • the latter is connected to the toothed lid 1b by four lugs 9 integral with the toothed lid 1b engaged in four respective openings 10 in arcs of circles, allowing relative rotation between the ring 17 and the toothed lid 1b of an angle corresponding to that of the openings 10 in arcs of circles.
  • the outer edge of the ring 17 has a ratchet toothing 17b engaged with a retaining pawl 18.
  • An auxiliary drive member 19 is further disposed on the cylindrical portion 1c of the barrel shaft.
  • This auxiliary drive member 19 is connected on the one hand to the gear cover 1b by two diametrically opposite pins 20, on the other hand, to the ring 17 by two spring arms 19a whose ends are housed in two notches 17c of the ring 17.
  • the pawl 18, engaged in the ratchet teeth 17b retains the ring 17, allowing the spring arms 19a to relax by rotating the toothed lid 1b in the opposite direction to that of the clockwise at a maximum angle corresponding to that of the openings in arcs of circles 10.
  • the internal end of the mainspring spring 6 again causes the ratchet wheel 15 in the opposite direction to that of the needles of the watch, brings the tenons 9 in the position illustrated by the figure 4 and resets the springs 19a of the auxiliary drive member 19.
  • this kinematic chain which constitutes a gear wheel is extended by a wheel 4 'whose last mobile 4'c is, in this example, a lap in 20 seconds and carries a needle of a seconds counter, and a reset cam 24.
  • a cog additional 4 "chronograph meshes directly with the toothing 1b of the cylinder cover 1 and leads, in this example, the last mobile 4" b of this wheel at a rate of one turn in 10 minutes.
  • This mobile 4 "b also carries a hand of a minute counter, and a reset cam 25.
  • connection between the reset cams 24, 25 and the mobiles 4'c, respectively 4 "b is a friction coupling under the pressure of a spring 26 bearing on the frame B.
  • the wheel 4f has a groove 21 engaged with an elastic arm 22 fixed to the frame of the workpiece. watchmaking.
  • This elastic arm 22 is flexible in a direction parallel to the axis of the last movable 4f of the chronograph train so that by bending, it can move the mobile 4f from the position of the figure 1.1 in which it is opposite and engaged with the escapement mobile 2 of the chronograph at the position of the figure 2.1 in which it is no longer in front of the escape wheel 2 of the chronograph and therefore more in contact with it.
  • the elastic arm 22 presses the shaft of the mobile 4f against its lower bearing 34 ( figure 2.1 ) thus acting simultaneously as a braking member which stops the mobile 4f in the stop position and allows the reading on a dial not shown, the angular position of the indicator hand integral with the shaft of the mobile 4f .
  • the various on / off control levers of the chronograph mechanism are those of a chronograph mechanism with column wheel 23 which constitutes the centralized control of the various levers.
  • This column wheel 23 comprises a ratchet gear in engagement with a locating pawl 42 and with a drive pawl 27 articulated at the end of a rocker 28 manually controlled by a first chronograph pusher 29 accessible from the outside. outside as usual.
  • This column wheel controls three levers, the clutch lever and brake 30 subjected to the force of a return spring 41, the zero stop lever 31 of the mobile 4f making one revolution per second and the lever 32 of switching off the brake lever 30. It can be seen that the zeroing of the wheel 4f can not be obtained by means of a cam as usually and as in the case of the cams 24 and 25, but re-engaging the wheel 4f with the chronograph exhaust wheel 2. As can be seen in particular on the Figures 3 and 3.1 the wheel 4f is secured to a stop member 33 which has two diametrically opposed arms for balancing, but one of which extends beyond the outer diameter of the teeth of the wheel 4f.
  • the angular position of the longer arm of the stop member 33 is in a position such that when the arm of the stop member 33 encounters the zero stop lever 31, the wheel 4f is in a angular position in which, the line of centers, joining the last mobile 4f of the first end of the chronograph wheel 4 to the chronograph exhaust wheel 2, passes halfway between two adjacent teeth of the mobile 4f, where none of these two teeth are not engaged with the chronograph escape wheel 2.
  • the zero stop lever 31 is integral with a resilient flexible arm 31a bearing against a stop 35. This flexible arm is constantly exerting on this lever 31 a torque tending to turn it in the opposite direction to that of the clockwise and bring back its end in contact with the column wheel 23 in a space between two columns as soon as it is presented, as illustrated by the figure 1 .
  • the Figures 2 and 2.1 represent the chronograph mechanism in the off position, following the driving of the column wheel 23 one step from the running position illustrated by the Figures 1 and 1.1 .
  • the column wheel 23 has enabled the clutch and brake lever 30 to swing in the counterclockwise direction under the action of its return spring 41.
  • This tilting stopped the wheel 4f by disengaging it from the chronograph escapement wheel 2 and immobilizing it by pressing its axis against the bearing 34, which makes it possible to measure the hundredth of a second, taking into account the fact that the needle second takes a turn in one second.
  • the zero stop lever 31 is moved clockwise so that its end is in the trajectory of the longest arm of the stop member 33 secured to the wheel 4f.
  • the zeroing of the wheel 4f which has just been described is controlled by a zero stop lever 31 under the control of a second reset pushbutton 37 which, thanks to the column wheel 23 can not be actuated only when the chronograph wheel 4 has been previously stopped, that is to say that it is in the position illustrated by the figure 2 .
  • the reset mechanism controlled by the second pusher 37 comprises a lever 36 for disengaging a spring-loaded locking member 38 provided with a retaining pin 38a engaged with a lug 39a of a reset lever. 39 of the cams 24 and 25 ( figures 1 and 2 ).
  • This reset lever 39 is subjected to the force of a spring 40.
  • the spring 40 drives the reset lever 39 in the direction of clockwise .
  • the reset lever 39 drives the lever 32 to deactivate the brake lever 30 to return it to its clutch position of the wheel 4f with the chronograph exhaust wheel, as illustrated by the figures 1.1 and 3 .
  • the two reset cams 24 and 25 are returned to the positions illustrated in FIG. figure 3 by the reset lever 39.
  • the displacement of the lever 36 by the second pusher 37 is limited by a notch 32a formed on the lever 32, as illustrated by FIG. figure 3 .
  • This limit position of the lever 32 engaged with the notch 32a lasts only as long as pressure is exerted on the pusher 37.
  • the spring 38 returns to its initial position and returns the lever 36 to the position illustrated in FIGS. figures 1 and 2 .
  • the chronograph mechanism is ready to be restarted by pressing the first pusher 29. Note that when the chronograph mechanism is in the off position illustrated by the figure 2 it can either be reset by pressing the second push-button 37, or restarted by pressing the first push-button 29, in which case the column wheel returns to the position illustrated by FIG. figure 1 and the measured times add up.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Claims (7)

  1. Chronograph mit einer ersten kinematischen Kette zwischen einem Federantrieb (6) und einer Hemmung, die mit einer Reguliervorrichtung gekoppelt ist, und mit einer zweiten kinematischen Kette (4), deren letztes Rad (4f) eines ersten Endes über eine Kupplungsvorrichtung (22, 30), die mit einem Simultanbremsorgan (34) gekoppelt ist, mit der ersten kinematischen Kette in einer selektiven Zwangsverbindung steht, dadurch gekennzeichnet, dass das erste Rad (4a) des zweiten Endes der zweiten kinematischen Kette (4) in einer direkten Verbindung mit einem Federantrieb (6) steht, dass die Verbindung zwischen dem letzten Rad (4f) des ersten Endes der zweiten kinematischen Kette und der ersten kinematischen Kette ein Ankerrad (2) des Chronographen aufweist, das mit einem Rad der ersten kinematischen Kette gekoppelt ist.
  2. Chronograph nach Anspruch 1, bei dem die erste kinematische Kette und die zweite kinematische Kette (4) jeweils mit einem Federantrieb (6) in Verbindung sind, der in der Mitte des Uhrwerks des Chronographen angeordnet ist.
  3. Chronograph nach einem der vorangehenden Ansprüche, bei dem die erste kinematische Kette mit einer ersten Zahnung (1a) eines Federhauses (1) verbunden ist, das in kinematischer Verbindung mit dem außenseitigen Ende des Federantriebs (6) ist, während die zweite kinematische Kette (4) mit einer zweiten Zahnung (1 b) des gleichen Federhauses (1) verbunden ist, das mittels einer unidirektionalen Antriebsvorrichtung (15-17) in einer kinematischen Verbindung mit dem innenseitigen Ende des gleichen Federantriebs (6) ist.
  4. Chronograph nach einem der vorangehenden Ansprüche, bei dem die selektive Verbindung zwischen der ersten kinematischen Kette und der zweiten kinematischen Kette (4) ein zweites Ankerrad (2) aufweist, das mit dem Ankerrad der ersten kinematischen Kette gekoppelt und mit dem letzten Rad (4f) des ersten Endes der zweiten kinematischen Kette (4) in Eingriff ist, und dass der Kupplungsmechanismus (22, 30), der mit einem Simultanbremsorgan (34) gekoppelt ist, mit dem ersten Rad (4f) des ersten Endes der zweiten kinematischen Kette (4) in Eingriff ist.
  5. Chronograph nach Anspruch 4, bei dem das Verhältnis zwischen dem zweiten Ankerrad (2) und dem letzten Rad (4f) des ersten Endes der zweiten kinematischen Kette so eingerichtet ist, dass das letzte Rad (4f) des ersten Endes der zweiten kinematischen Kette (4) eine Umdrehung pro Sekunde ausführt.
  6. Chronograph nach Anspruch 4, bei dem das letzte Rad (4f) des ersten Endes der zweiten kinematischen Kette (4) schwenkbar zwischen zwei Lagern mit einem axialen Spiel montiert ist, das zum Einnehmen von wenigstens zwei axialen Stellungen eingerichtet ist, nämlich einer ersten Stellung, bei der dessen Zahnung in Eingriff mit einem Ankerrad (2) des Chronographen ist, das mit einem der Räder der ersten kinematischen Kette gekoppelt ist, und einer zweiten Stellung, bei der es nicht in Eingriff mit diesem Ankerrad (2) des Chronographen ist, wobei das letzte Rad (4f) des ersten Endes der zweiten kinematischen Kette (4) unter axialem Verschieben mit einem Kupplungs- und Bremsorgan (30) gekoppelt ist, das in der zweiten Stellung einen Abschnitt des letzten Rades (4f) gegen eine Oberfläche eines axialen Anschlages (34) mit einer Kraft drückt, die dieses zur Ruhe bringt.
  7. Chronograph nach einem der vorangehenden Ansprüche, bei dem ein Säulenrad (23) insbesondere mit einem Nullstellhebel (31) in Eingriff ist, der dazu eingerichtet ist, durch das Säulenrad (23) zwischen einer Ruhestellung und einer Anhaltestellung bewegt zu werden, bei der ein Anhalteelement des Nullstellhebels (31) in der Bahn eines Anhaltearmes (33) angeordnet ist, der mit dem letzten Rad (4f) des ersten Endes der zweiten kinematischen Kette (4) gekoppelt ist, wobei die Anhaltestellung einer Stellung entspricht, in der die das letzte Rad (4f) des ersten Endes der zweiten kinematischen Kette (4) mit dem Ankerrad des Chronographen (2) verbindende Mittellinie die beiden benachbart des letzten Rades (4f) des ersten Endes der zweiten kinematischen Kette (4) angeordneten Zähne in einem halben Abstand quert, wobei keiner der beiden Zähne mit dem Ankerrad des Chronographen (2) in Eingriff ist, um dem Ankerrad (2) des Chronographen zu gestatten, sich zu drehen, ohne das letzte Rad (4f) des ersten Endes der zweiten kinematischen Kette (4) anzutreiben.
EP20070405107 2007-04-04 2007-04-04 Chronograph Active EP1978424B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20070405107 EP1978424B1 (de) 2007-04-04 2007-04-04 Chronograph

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Application Number Priority Date Filing Date Title
EP20070405107 EP1978424B1 (de) 2007-04-04 2007-04-04 Chronograph

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EP1978424A1 EP1978424A1 (de) 2008-10-08
EP1978424B1 true EP1978424B1 (de) 2011-11-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105911854B (zh) * 2015-02-23 2018-06-19 蒙特雷布勒盖股份有限公司 计时机构
CN110050236A (zh) * 2016-11-17 2019-07-23 诺格拉公司 具有零重置功能的显示机构

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3855254A1 (de) * 2020-01-24 2021-07-28 Patek Philippe SA Genève Uhrwerk

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH554016A (de) 1972-03-15 1974-09-13
CH1003373A4 (de) * 1973-07-10 1976-03-15
CH678911B5 (de) * 1990-04-12 1992-05-29 Ebauchesfabrik Eta Ag
EP1498788A1 (de) * 2003-07-14 2005-01-19 Eterna SA Anzeigevorrichtung für Uhren

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105911854B (zh) * 2015-02-23 2018-06-19 蒙特雷布勒盖股份有限公司 计时机构
CN110050236A (zh) * 2016-11-17 2019-07-23 诺格拉公司 具有零重置功能的显示机构

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Publication number Publication date
EP1978424A1 (de) 2008-10-08

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