EP1746471B1 - Return-to-zero device for two time counters - Google Patents
Return-to-zero device for two time counters Download PDFInfo
- Publication number
- EP1746471B1 EP1746471B1 EP05405447.3A EP05405447A EP1746471B1 EP 1746471 B1 EP1746471 B1 EP 1746471B1 EP 05405447 A EP05405447 A EP 05405447A EP 1746471 B1 EP1746471 B1 EP 1746471B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- zero
- hammers
- resetting
- lever
- cams
- 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.)
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Classifications
-
- 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
- G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
- G04F7/0809—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with single hammers, i.e. one hammer acts on each counter
Definitions
- the present invention relates to a device for simultaneous resetting of two time counters, including chronograph, whose pivot axes are integral with respective resetting cams in the form of cores, comprising a reset lever comprising two hammers, means for selectively exerting on this lever a torque for applying the two hammers against the reset cams and means of articulation of these hammers relative to the reset lever as described in JP2004264036 .
- a heart-shaped reset cam is associated with the axis of the counter and a hammer whose orientation of the striking face bears against symmetrical shoulders of the heart, serves to define the angular position corresponding to the zero of the counter.
- this cam is moved away from its angular position corresponding to the counter zero, and the hammer strikes laterally against it, the force of the hammer is transformed into a torque that rotates the cam until the striking face of the hammer press on the two shoulders of the heart-shaped cam and immobilize it.
- one of the two hammers be adjustable or resilient to absorb tolerances. Which says adjustment of a moving part says means to fix its position Given the dimensions of the pieces, when it is about a wrist chronograph, there is a good chance that the adjustment carried out goes wrong when one wants to fix the set position. If it is a moving part connected by friction, the setting may be out of adjustment.
- a chronograph mechanism has a large number of parts and for reasons of space, it is not always possible to have this pivot axis of the hammers on the carrier lever and the axis of rotation of the lever in the above positions.
- the object of the present invention is to overcome, at least in part, the disadvantages of the aforementioned solutions.
- this invention relates to a device for simultaneous resetting of two time counters according to claim 1.
- the chronograph mechanism illustrated in part is that of a conventional mechanism making use of a central command called column wheel 1. It is specified however that the invention relates essentially to a new design of the reset lever to hammers 2 and that such a lever could quite well be used with the same advantages in any mechanism in which two time counters (minutes and seconds for example) must be reset simultaneously using a same reset lever.
- the column wheel 1 is secured to a ratchet gear engaged with a positioning pawl 3 and with a drive pawl 4a hinged to the end of a control lever 4, itself articulated about an axis 4b.
- This rocker is used to advance the column wheel 1 step by step, including moving the bodies of the reset mechanism of the position illustrated by the figure 1 to that illustrated by the figure 2 and vice versa.
- the part of this mechanism to which the present invention relates relates to the reset lever with two hammers 2.
- This is illustrated separately by the figure 3 with a spring 5 which applies a force F to a peg 2a integral with the reset lever 2, developing a torque about the pivot axis 2b of the reset lever 2.
- This reset lever 2 is shaped to fit a finger 2c engaged with the columns 1b of the column wheel 1, under the pressure of the spring 5.
- every other step of the toothing of the column wheel 1 the finger 2c is between two columns 1b and every other step it presses a column 1b, which respectively controls the reset position illustrated by the figures 1 and 3 and the running position of the counters, as will be explained below.
- the two hammer reset lever 2 further comprises two pins 2d, 2e which are respectively engaged in two openings 6a, 6b of a piece 6 with two hammers 6c, 6d an elongate opening 6a and an opening 6b sized to allow the elongate opening 6a, so to the piece 6, to rotate a limited angle around the pin 2d.
- the hammers 6c, 6d are engaged with two heart-shaped cams 7, 8 respectively which are each integral with the pivot axis 7a, respectively 8a of the movable indicator member (not shown) of one of the two counters for example, minutes and seconds.
- the figure 3 shows the effect obtained thanks to the existence of the elongate opening 6a forming a limited slider, according to the solution proposed by the present invention. It can be seen that this slide is oriented so that, during the reset, the direction of perpendicular lowered from the axis of the pin 2d on this slide 6a and which corresponds to the direction of the force F1 transmitted from the lever of resetting 2 to the double hammer part 6, cuts the line joining the axes of the reset cams 7a, 8a at a point capable of improving the distribution of the forces F2, F3 exerted on the cams 7, 8 respectively. report to the figure 4 it can be seen that the slide 6a makes it possible to reduce this force F1 more towards the cam 8.
- this has the effect of practically doubling the force F3 transmitted to this cam 8 with respect to that transmitted in the case of the figure 4 , without diminishing the F2 exerted on the cam 7 and this regardless of the position of the pivot axis of the lever 2b and the pin 2d.
- the opening 6b it is chosen to provide a degree of freedom sufficient to allow the piece 6 to rotate a limited degree around the ankle 2d to ensure a contact between the hammers 6c and 6d with hearts 7 and 8 respectively, which allows the rotation of these two hearts. Indeed, if the hammers were not limited in their movement around the ankle 2d, they could take a position such that at the time of the contact between the hammers 6c and 6d with the hearts, it is not the working surface of the hammers which acts on the hearts, which would cause a blockage of the rotation of the hearts.
- the axis of rotation of the lever should be located, relative to the straight line connecting the axes of the reset cams, in a position that allows to apply to the pivot axis of the hammers a force whose direction form, with the straight line connecting the axes of the reset cams, an angle as close as possible to the right angle, so that the torque transmitted to each cam is sufficient to rotate them.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Description
La présente invention se rapporte à un dispositif de remise à zéro simultané de deux compteurs de temps, notamment de chronographe, dont les axes de pivotement sont solidaires de cames de remise à zéro respectives en formes de coeurs, comprenant un levier de remise à zéro comportant deux marteaux, des moyens pour exercer sélectivement sur ce levier un couple pour appliquer les deux marteaux contre les cames de remise à zéro et des moyens d'articulation de ces marteaux par rapport au levier de remise à zéro tel que décrit dans
Pour effectuer la remise à zéro d'un compteur, notamment de chronographe, on associe une came de remise à zéro en forme de coeur à l'axe du compteur et un marteau dont l'orientation de la face de frappe, en appui sur les épaulements symétriques du coeur, sert à définir la position angulaire correspondant au zéro du compteur. Dès que cette came est écartée de sa position angulaire correspondant au zéro du compteur, et que le marteau frappe latéralement contre elle, la force du marteau se transforme en un couple qui fait tourner la came jusqu'à ce que la face de frappe du marteau appuie sur les deux épaulements de la came en forme de coeur et l'immobilise. Si cette came a tourné de moins de 180°, le marteau la fait tourner d'un demi tour dans le sens contraire à son sens de rotation, si elle a tourné de plus de 180°, le marteau la ramène à zéro en la faisant tourner dans son sens de rotation, dans le cas d'un coeur symétrique.To reset a counter, especially a chronograph, a heart-shaped reset cam is associated with the axis of the counter and a hammer whose orientation of the striking face bears against symmetrical shoulders of the heart, serves to define the angular position corresponding to the zero of the counter. As soon as this cam is moved away from its angular position corresponding to the counter zero, and the hammer strikes laterally against it, the force of the hammer is transformed into a torque that rotates the cam until the striking face of the hammer press on the two shoulders of the heart-shaped cam and immobilize it. If this cam has rotated less than 180 °, the hammer rotates it by half a turn in the opposite direction to its direction of rotation, if it turned more than 180 °, the hammer brings it back to zero by making it turn in its direction of rotation, in the case of a symmetrical heart.
Pour effectuer la remise à zéro simultanée de deux compteurs, on utilise un levier à deux marteaux. Compte tenu des différentes tolérances, un tel dispositif ne permet en pratique pas d'obtenir un appui simultané des deux faces de frappe des marteaux sur les deux épaulements des deux coeurs en position de remise à zéro. On n'aura en effet un appui que sur trois des quatre épaulements, en sorte que la position zéro de l'un des deux marteaux n'est pas définie avec précision.To perform the simultaneous reset of two counters, a lever with two hammers is used. Given the different tolerances, such a device does not allow in practice to obtain a simultaneous support of the two striking faces of the hammers on the two shoulders of the two hearts in reset position. We will only have support on three of the four shoulders, so that the zero position of one of the two hammers is not precisely defined.
Il existe différentes solutions pour résoudre ce problème. On peut effectuer une retouche de la face de frappe du marteau qui appuie sur les deux épaulements jusqu'à ce que la face de frappe de l'autre appuie sur les deux épaulements. Il s'agit là d'un travail de mise au point délicat.There are different solutions to solve this problem. A touch-up of the striking face of the hammer that presses on the two shoulders can be performed until the striking face of the other presses on the two shoulders. This is a delicate work of fine tuning.
On a aussi proposé que l'un des deux marteaux soit réglable ou élastique pour absorber les tolérances. Qui dit réglage d'une pièce mobile dit moyens pour fixer sa position Compte tenu des dimensions des pièces, lorsqu'il s'agit d'un chronographe bracelet, il y a de grandes chances pour que le réglage effectué se dérègle lorsque l'on veut fixer la position réglée. Si il s'agit d'une pièce mobile reliée par friction, le réglage risque de se dérégler.It has also been proposed that one of the two hammers be adjustable or resilient to absorb tolerances. Which says adjustment of a moving part says means to fix its position Given the dimensions of the pieces, when it is about a wrist chronograph, there is a good chance that the adjustment carried out goes wrong when one wants to fix the set position. If it is a moving part connected by friction, the setting may be out of adjustment.
Enfin, on a proposé dans le
Or, un mécanisme de chronographe comporte un grand nombre de pièces et pour des questions d'encombrement, il n'est pas toujours possible de disposer cet axe de pivotement des marteaux sur le levier porteur ainsi que l'axe de rotation du levier dans les positions susmentionnées.However, a chronograph mechanism has a large number of parts and for reasons of space, it is not always possible to have this pivot axis of the hammers on the carrier lever and the axis of rotation of the lever in the above positions.
Le but de la présente invention est de remédier, au moins en partie, aux inconvénients des solutions susmentionnées.The object of the present invention is to overcome, at least in part, the disadvantages of the aforementioned solutions.
A cet effet, cette invention a pour objet un dispositif de remise à zéro simultané de deux compteurs de temps selon la revendication 1.For this purpose, this invention relates to a device for simultaneous resetting of two time counters according to
Les dessins annexés illustrent, schématiquement et à titre d'exemple, une forme d'exécution du dispositif objet de la présente invention.
- La
figure 1 est une vue en plan de l'ensemble du mécanisme de remise à zéro des compteurs de chronographe en position de remise à zéro; - la
figure 2 est une vue semblable à celle de lafigure 1 en position désactivée du mécanisme de remise à zéro; - la
figure 3 est une vue partielle de lafigure 1 ne montrant que le levier et les deux marteaux de remise à zéro avec les forces appliquées sur les cames; - la
figure 4 est une vue semblable à lafigure 3 illustrant les forces appliquées sur les cames, en transposant la solution selon l'état de la technique à l'exemple selon la présente invention.
- The
figure 1 is a plan view of the entire resetting mechanism of the chronograph counters in the reset position; - the
figure 2 is a view similar to that of thefigure 1 in the deactivated position of the reset mechanism; - the
figure 3 is a partial view of thefigure 1 showing only the lever and the two reset hammers with the forces applied on the cams; - the
figure 4 is a view similar to thefigure 3 illustrating the forces applied on the cams, by transposing the solution according to the state of the art to the example according to the present invention.
Le mécanisme de chronographe illustré en partie est celui d'un mécanisme classique faisant usage d'une commande centrale dite à roue à colonnes 1. Il est précisé toutefois que l'invention se rapporte essentiellement à une nouvelle conception du levier de remise à zéro à marteaux 2 et qu'un tel levier pourrait tout à fait être utilisé avec les mêmes avantages dans n'importe quel mécanisme dans lequel deux compteurs de temps (minutes et secondes par exemple) doivent être remis à zéro simultanément à l'aide d'un même levier de remise à zéro.The chronograph mechanism illustrated in part is that of a conventional mechanism making use of a central command called
La roue à colonnes 1 est solidaire d'une denture à rochet la en prise avec un cliquet de positionnement 3 et avec un cliquet d'entraînement 4a articulé à l'extrémité d'une bascule de commande 4, elle-même articulée autour d'un axe 4b. Cette bascule sert à faire avancer la roue à colonnes 1 pas à pas, faisant notamment déplacer les organes du mécanisme de remise à zéro de la position illustrée par la
La partie de ce mécanisme sur laquelle porte la présente invention est relative au levier de remise à zéro à deux marteaux 2. Celui-ci est illustré séparément par la
Le levier de remise à zéro à deux marteaux 2 comporte encore deux chevilles 2d, 2e qui sont engagées respectivement dans deux ouverture 6a, 6b d'une pièce 6 à deux marteaux 6c, 6d une ouverture allongée 6a et une ouverture 6b dimensionnées pour permettre à l'ouverture allongé 6a, donc à la pièce 6, de tourner d'un angle limité autour de la cheville 2d. Les marteaux 6c, 6d sont en prise avec deux cames en forme de coeur 7, respectivement 8 qui sont chacune solidaire de l'axe de pivotement 7a, respectivement 8a de l'organe indicateur mobile (non représenté) de l'un des deux compteurs, par exemple, minutes et secondes.The two
Si on avait un simple pivotement de la pièce 6 à double marteaux 6c, 6d, autour de la cheville 2d, comme dans l'état de la technique, tel qu'illustré par la
La
Quant à l'ouverture 6b, elle est choisie pour offrir un degré de liberté suffisant pour permettre à la pièce 6 de pivoter d'un degré limité autour de la cheville 2d en vue d'assurer une prise de contact entre les marteaux 6c et 6d avec les coeurs 7 et 8 respectivement, qui permette la rotation de ces deux coeurs. En effet, si les marteaux n'étaient
pas limités dans leur déplacement autour de la cheville 2d, ils pourraient prendre une position telle qu'au moment de la prise de contact entre les marteaux 6c et 6d avec les coeurs, ce ne soit pas la surface de travail des marteaux qui agisse sur les coeurs, ce qui provoquerait un blocage de la rotation des coeurs.As for the opening 6b, it is chosen to provide a degree of freedom sufficient to allow the piece 6 to rotate a limited degree around the
not limited in their movement around the
Toutefois, comme le montre l'exemple de la
Claims (1)
- Device for simultaneous resetting-to-zero of two time counters, in particular for a chronograph, of which the pivot spindles are fixed relative to respective heart-shaped zero-resetting cams (7, 8), comprising a zero-resetting lever (2), a part with two hammers (6c, 6d), articulation means (2d, 2e, 6a, 6b) forming part of the zero-resetting lever (2) and of said part with two hammers and articulating the zero-resetting lever (2) and said part with two hammers with respect to each other, and means (5) to selectively exert on the zero-resetting lever (2) a torque to apply the two hammers (6c, 6d) against the zero-resetting cams (7, 8) respectively, designed in such a way that the articulation means comprise first and second pins (2d, 2e), a limited-amplitude slide-way (6a) in which the first pin (2d) is engaged to drive the part with two hammers by the zero-resetting lever (2) and an opening (6b) in which the second pin (2e) is engaged with play, in such a way that the limited-amplitude slide-way (6a) is oriented in order that during the zero-resetting, the direction of the force (F1) exerted by the zero-resetting lever (2) on the part with two hammers intersects the straight line joining the spindles (7a, 8a) of the zero-resetting cams (7, 8) at a point closer to one (8) of the cams (7, 8) than if the first pin (2d) was engaged in an opening only allowing a simple pivoting of the part with two hammers with respect to the zero-resetting lever (2), in order to improve the distribution of said torque transmitted to these cams (7, 8), and in such a way that the engagement of the second pin (2e) in the corresponding opening (6b) makes it possible for said slide-way (6a) to rotate to a limited degree about the first pin (2d).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05405447.3A EP1746471B1 (en) | 2005-07-20 | 2005-07-20 | Return-to-zero device for two time counters |
US11/484,810 US7331706B2 (en) | 2005-07-20 | 2006-07-12 | Zero-resetting device for two time counters |
CN200610106009A CN100585519C (en) | 2005-07-20 | 2006-07-19 | Return-to-zero device for two time counters |
JP2006198597A JP4896614B2 (en) | 2005-07-20 | 2006-07-20 | A nulling device for two time accumulators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05405447.3A EP1746471B1 (en) | 2005-07-20 | 2005-07-20 | Return-to-zero device for two time counters |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1746471A1 EP1746471A1 (en) | 2007-01-24 |
EP1746471B1 true EP1746471B1 (en) | 2019-09-18 |
Family
ID=35787961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05405447.3A Active EP1746471B1 (en) | 2005-07-20 | 2005-07-20 | Return-to-zero device for two time counters |
Country Status (4)
Country | Link |
---|---|
US (1) | US7331706B2 (en) |
EP (1) | EP1746471B1 (en) |
JP (1) | JP4896614B2 (en) |
CN (1) | CN100585519C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4390574A1 (en) * | 2022-12-21 | 2024-06-26 | Blancpain SA | Chronograph mechanism for a timepiece movement and timepiece comprising such a mechanism |
Families Citing this family (17)
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EP1791042A1 (en) * | 2005-11-24 | 2007-05-30 | Vaucher Manufacture Fleurier SA | Hammer for a timepiece |
DE602006013838D1 (en) * | 2006-11-06 | 2010-06-02 | Longines Montres Comp D | A watch comprising a correction mechanism for a time-scale display device |
EP2113817B1 (en) * | 2007-02-22 | 2018-12-26 | ETA SA Manufacture Horlogère Suisse | Chronograph |
EP2045672B1 (en) * | 2007-10-02 | 2014-02-26 | Omega SA | Device for resetting two time counters |
CH704304B1 (en) * | 2007-12-21 | 2012-06-29 | Frank Mueller Watchland S A | chronograph mechanism, watch movement and timepiece including such a mechanism. |
CH700752B1 (en) * | 2009-04-15 | 2014-03-14 | Patek Philippe Sa Geneve | chronograph mechanism and timepiece provided with such a mechanism. |
JP2010261815A (en) * | 2009-05-07 | 2010-11-18 | Seiko Instruments Inc | Chronograph mechanism and chronograph timepiece including the same |
EP2602672B1 (en) * | 2011-12-08 | 2014-07-16 | ETA SA Manufacture Horlogère Suisse | Column wheel and chronograph mechanism comprising such a wheel |
EP2602675B1 (en) * | 2011-12-08 | 2014-08-27 | ETA SA Manufacture Horlogère Suisse | Timepiece movement comprising a chronograph mechanism with column wheel |
JP6266218B2 (en) * | 2012-03-21 | 2018-01-24 | セイコーインスツル株式会社 | Chronograph nulling mechanism, chronograph mechanism, movement, and chronograph watch |
CH707233A1 (en) * | 2012-11-22 | 2014-05-30 | Eterna Ag Uhrenfabrik | Minutzenzähler a watch, in particular a chronograph. |
CH708999A1 (en) * | 2013-12-16 | 2015-06-30 | Société Anonyme De La Manufacture D Horlogerie Audemars Piguet & Cie | Device reset with independent hammers. |
EP3147728A1 (en) * | 2015-09-24 | 2017-03-29 | Harry Winston SA | Mechanism for positioning a toothed wheel in a clock movement |
EP3876042B1 (en) * | 2020-03-05 | 2023-12-06 | Montres Breguet S.A. | System for resetting a chronograph |
CH718458A9 (en) * | 2021-03-18 | 2022-11-30 | Mft Dhorlogerie Audemars Piguet Sa | Actuation mechanism for a watch movement, in particular a chronograph mechanism comprising such an actuation mechanism. |
US20230389758A1 (en) | 2021-11-15 | 2023-12-07 | Cleana Inc. | Self-lifting toilet seat |
US11950733B2 (en) | 2022-08-04 | 2024-04-09 | Cleana Inc. | Self-lowering toilet seat system |
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JP2004264036A (en) * | 2003-01-28 | 2004-09-24 | Seiko Epson Corp | Clock having chronograph |
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GB1405101A (en) * | 1971-08-20 | 1975-09-03 | Smiths Industries Ltd | Reset mechanisms for use in stopwatches |
CH571741B5 (en) * | 1973-04-06 | 1976-01-15 | Valjoux Sa | |
CH1003473A4 (en) * | 1973-07-10 | 1976-07-15 | ||
CH670187GA3 (en) * | 1987-05-12 | 1989-05-31 | ||
WO1993006535A1 (en) * | 1991-09-13 | 1993-04-01 | Citizen Watch Co., Ltd. | Multi-time indicating analog watch |
CH690524A5 (en) * | 1995-10-31 | 2000-09-29 | Rolex Montres | Piece chronograph mechanism watchmaking. |
EP1426838B1 (en) * | 1998-09-10 | 2007-10-17 | Seiko Epson Corporation | Timepiece |
CN100385352C (en) * | 2001-03-21 | 2008-04-30 | 格拉舒特钟表厂有限责任公司 | Chronograph with two rotational directions |
DE602004018429D1 (en) * | 2003-01-28 | 2009-01-29 | Seiko Epson Corp | MULTIFUNCTION WATCH |
JP4296019B2 (en) * | 2003-03-27 | 2009-07-15 | セイコーインスツル株式会社 | Chronograph watch with nulling structure |
-
2005
- 2005-07-20 EP EP05405447.3A patent/EP1746471B1/en active Active
-
2006
- 2006-07-12 US US11/484,810 patent/US7331706B2/en not_active Expired - Fee Related
- 2006-07-19 CN CN200610106009A patent/CN100585519C/en not_active Expired - Fee Related
- 2006-07-20 JP JP2006198597A patent/JP4896614B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2004264036A (en) * | 2003-01-28 | 2004-09-24 | Seiko Epson Corp | Clock having chronograph |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4390574A1 (en) * | 2022-12-21 | 2024-06-26 | Blancpain SA | Chronograph mechanism for a timepiece movement and timepiece comprising such a mechanism |
Also Published As
Publication number | Publication date |
---|---|
CN1900852A (en) | 2007-01-24 |
US7331706B2 (en) | 2008-02-19 |
CN100585519C (en) | 2010-01-27 |
EP1746471A1 (en) | 2007-01-24 |
JP2007024899A (en) | 2007-02-01 |
JP4896614B2 (en) | 2012-03-14 |
US20070019509A1 (en) | 2007-01-25 |
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