EP0490285B1 - Timepiece of fly-back hand chronograph type provided with a device for stopping and starting the fly-back hand - Google Patents

Timepiece of fly-back hand chronograph type provided with a device for stopping and starting the fly-back hand Download PDF

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Publication number
EP0490285B1
EP0490285B1 EP91120949A EP91120949A EP0490285B1 EP 0490285 B1 EP0490285 B1 EP 0490285B1 EP 91120949 A EP91120949 A EP 91120949A EP 91120949 A EP91120949 A EP 91120949A EP 0490285 B1 EP0490285 B1 EP 0490285B1
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EP
European Patent Office
Prior art keywords
fly
branches
wheel
pincer
connecting portion
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.)
Expired - Lifetime
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EP91120949A
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German (de)
French (fr)
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EP0490285A1 (en
Inventor
Cyril Vuilleumier
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ETA Manufacture Horlogere Suisse SA
Ebauchesfabrik ETA AG
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ETA Manufacture Horlogere Suisse SA
Ebauchesfabrik ETA AG
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Publication of EP0490285A1 publication Critical patent/EP0490285A1/en
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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
    • G04F7/0866—Special arrangements
    • G04F7/0876—Split-time function, e.g. rattrappante

Definitions

  • the present invention relates to a timepiece of the split-seconds chronograph type, equipped with a device for controlling the stopping and starting of a split-seconds hand.
  • a mechanical or electromechanical chronograph comprising a clockwork movement which controls display organs such as a second hand called a "hand" chronograph ", a minute counter and an hour counter. Thanks to this chronograph, we can then determine the time it took for this runner to complete a given route.
  • a chronograph in its simplest version for example a chronograph provided with a single pusher, does not make it possible to measure several successive times, since it necessarily requires a reset of its display members after each measurement. We therefore have recourse in this case to the use of a chronograph provided with an additional seconds hand called "split-seconds hand".
  • FIGs 1 and 2 attached illustrate a chronograph equipped with a device for controlling a split-second hand according to the aforementioned book by B. Humbert.
  • the dial side of the chronograph is located at the top.
  • the split-seconds chronograph is provided with a medium-sized wheel 1 forming part of a mobile 3 pierced over its entire length, a chronograph wheel 5 whose tube 7 pivots inside the mobile 3 and a split-second wheel 9 whose axis 11 is freely adjusted inside the tube 7.
  • a catch-up needle 13 On the free end of the axis 11 is fixed a catch-up needle 13 while the other end of said axis is in abutment against a stone 14 provided in a bridge 16.
  • a chronograph needle 15 is fixed at one end of the tube 7.
  • a heart 17, called split-heart At the other end of this tube is fixed a heart 17, called split-heart which is integral in rotation with the chronograph wheel 5.
  • a chronograph heart 19 is fixed on the tube 7 against the side chronograph wheel 5.
  • the various chronograph parts are arranged on either side of a chronograph plate 21 and a bridge 23.
  • a lever 25 is pivotally mounted under a serge 27 (FIG. 1) of the split-second wheel 9 and pivots about an axis 29. At the free end of this lever 25 is rotatably mounted a roller 31, preferably in ruby . This lever 25 is biased by a spring 33 which is also mounted on the rim 27. Thanks to this spring 33, the roller 31 is kept in permanent contact with the periphery of the split-back core 17.
  • the split-second wheel 9 is arranged between the two branches 35 and 37 of a split-grip pliers 39 in a U so that the ends of these two branches can pinch the wheel 9 in two diametrically opposite places.
  • a column wheel 41 is disposed between the two branches 35, 37 at the height of their middle region.
  • the column wheel 41 present in its upper part (with respect to FIG. 1), that is to say in its part directed towards the bottom of the chronograph case, a cam 42 comprising eight columns 43 regularly distributed around its periphery and in its lower part a ratchet 44 provided with sixteen teeth 45.
  • This column wheel 41 can be rotated in the direction of arrow F1 by a pawl 47 which acts on the teeth 45.
  • This pawl 47 can itself be actuated by a rocker 49 while being subjected to the action of 'a spring 51.
  • the column wheel 41 is locked in rotation by a jumper 53 and the split-second clamp 39 pivots freely around a tenon 55 mounted on an extension of the foot of the jumper 53.
  • the two branches 35 and 37 of the split-second clamp 39 are provided with spouts, respectively 57 and 59 cooperating with the columns 43.
  • the two branches 35 and 37 can move between two positions.
  • a first position shown in Figure 1 the spouts 57 and 59 are respectively between two neighboring columns 43, so that the branches 35 and 37 pinch the split-wheel 9 and lock it.
  • a second position the spouts 57, 59 are respectively in abutment against two diametrically opposite columns 43, which means that the branches 35 and 37 are separated from the wheel 9. The transition from the first position of the branches to the second therefore takes place in the direction of the arrows F2.
  • the roller 31 located at the end of the lever 25 is housed in the notch 61 of the split-second heart 17. Consequently, when the chronograph wheel 5 rotates by advancing in steps, driven by a driving wheel not shown, it drives not only the tube 7, the split-heart 17 and the chronograph hand 15, but also the split-wheel 9 by means of the lever 25.
  • the split-wheel 9 rotates in synchronism with the chronograph wheel 5 and the two hands 13 and 15 rotate simultaneously and are superposed on each other.
  • the user After having read the intermediate time, the user exerts a second pressure on the lever 49. This has the effect of rotating the column wheel 41 by an additional step and of spreading the arms 35 and 37 of the clamp 39.
  • the split-second wheel 9 is released and rotates until the roller 31 of the lever 25 is again in the notch 61 under the action of the spring 33 which was bandaged during the rotation of the split-wheel.
  • the two needles 13 and 15 then start to rotate again.
  • the precaution taken by the watchmaker-manufacturer consists in providing spans between the mobiles only at one end of them (that is to say generally near the hands) as shown in the figure. 2.
  • the opposite end of the mobile is then supported only on an axial stop (stone 14, Figure 2) without being held radially.
  • the mobiles in question can thus adjust themselves radially one inside the other without resulting in premature wear or even blocking in rotation.
  • Document CH 38 824 has drawbacks of the same nature and others in addition since what serves as a split-second clamp is formed by two independent branches fixed by screws.
  • the invention aims to remedy the aforementioned drawbacks.
  • the subject of the invention is therefore a timepiece of the split-seconds chronograph type, equipped with a device for controlling the stopping and running of a split-seconds hand, the piece comprising a split-seconds mobile fixed to said split-second needle, one-piece split-second pliers substantially taking the shape of a U with two branches, two respective ends of which are connected by a connecting portion, the split-second mobile being disposed between the free ends of the two branches, and means for deforming said clamp so that it can assume two configurations, namely a first configuration called closed, in which each branch of the clamp exerts a radial force on the periphery of the split-second mobile so as to block the latter, and a second configuration, called open, in which the two arms of the clamp are not in contact with the split-second mobile so as to leave the latter free and to authorize the running of said split-second needle, this part being characterized in that it further comprises two organs of fixed reactions against which a first side of said connection portion is pressed and in that said deformation means comprise means
  • control device is capable of simultaneously spreading the branches of the split-second mobile and also bringing them together simultaneously, which avoids any asymmetrical radial force on the split-second mobile to a much lesser extent than in the device according to CH-A-38 824.
  • the means for generating a deformation force on the connecting portion have a joint action on the two branches of the clamp, this action being simultaneous on the two branches because it results from the sole application of the deformation force on a same element constituted by the connecting portion.
  • the deformation force is advantageously applied in the middle of the portion of link between the two reaction bodies.
  • the result remains similar throughout a central region centered on the middle of this connecting portion, this central region being greater than the usual tolerances, for a mechanical watch movement, in the positioning of an element such as a column wheel, a ratchet, operating lever, etc.
  • the control device comprises a clamp split-second 101 intended to cooperate with the wheel 102 of the split-second mobile 103 of a chronograph.
  • This mobile 103 is provided with a pivot 105 at the end of which is a catch-up needle 107 (shown only in FIG. 7).
  • the split-second pliers 101 made in one piece has the general shape of a U with two branches 109 and 111 connected by a strip 113 forming a connecting portion.
  • the wheel 102 of the split-second mobile 103 is disposed between the free ends of the branches 109 and 111.
  • the control device is mounted on a plate 114 in which are driven two pins 115 and 117 acting as reaction members.
  • the clamp 101 has in its connection zones between the branches 109 and 111 and the connection portion or lamella 113, arcuate connection portions 119 and 121 which pass around the respective pins 115 and 117 at an angle of approximately 270 °, thus giving the gripper 101 a good seat.
  • Each branch 109, 111 further comprises, going in the direction of its free end, a bent portion 123 bringing it towards the other branch, a straight portion 125 in which a recess 127 is provided, an enlarged portion 129a, 129b and a arcuate portion 131 extending towards the outside of the clamp followed by an active rectilinear portion 133 which tangents the periphery of the wheel 102.
  • each branch located on either side of the recess 127 extend in different planes, those located on the side of the mobile 103 being the furthest from the plate.
  • each branch has a width l 1 greater than the width l 2 of the connecting portion 113.
  • the branches 109 and 111 have in the plane of the clamp a stiffness markedly greater than this connecting portion 113 in which the deformation of the clamp is concentrated, when the latter is urged to release the mobile 103.
  • the control device also comprises deformation means 135, the construction of which is as follows.
  • a pin 137 is driven into the plate 114 and held at its other end by a bridge 114 '.
  • a mobile 141 with two stages 141a and 141b.
  • the first stage 141a located closest to the plate 114 carries a cam 142, with five spans for example, while the second stage forms a ratchet 141b here having ten triangular teeth.
  • the cam 142 is provided in the plane of the clamp 101.
  • the control device also includes a thrust and positioning member 143 formed by a V-shaped spring (FIG. 3A) the tip of which is mounted so as to be able to pivot around a pin 145 driven into the plate 114.
  • a thrust and positioning member 143 formed by a V-shaped spring (FIG. 3A) the tip of which is mounted so as to be able to pivot around a pin 145 driven into the plate 114.
  • a first branch 143a of this V-shaped spring extends from the pin 145 to a gap formed between the cam 142 and the deformable strip 113 of the clamp 101.
  • the free end of this branch is shaped so as to constitute a movement transmission head 143c which is in elastic contact with the profile of the cam 142 while also being in elastic contact with the deformable strip 113.
  • the opposite branch 143b of the pushing and positioning member 143 jumper-shaped to block the mobile 141 and the cam 142 in rotation, when the control device is active (FIG. 3). Otherwise, it is the other branch 143a of the member 143 which ensures the rotation blocking of the mobile 141.
  • the control device also comprises a control lever 147 (FIG. 3B), formed by a curved blade fixed by a first end portion 147a to the pin 145 and to another pin 149 situated at a certain distance from the latter and also driven into the plate 114.
  • a control lever 147 (FIG. 3B), formed by a curved blade fixed by a first end portion 147a to the pin 145 and to another pin 149 situated at a certain distance from the latter and also driven into the plate 114.
  • a narrow portion 147b elastically deformable extends from the pin 149 in the direction of the mobile 141 where it is extended by a wider and more rigid pallet 147c extending approximately at right angles in the same plane as the narrow portion 147b.
  • a tab 147d bent out of the plane of the control lever is intended to cooperate with a push button (not shown) located at the outside of the chronograph case (see in particular Figure 5).
  • the pallet 147c is connected to an actuating portion 147e in the form of a V, the free branch 147f of which has a hook-shaped head 147g intended to act on the ratchet 141b.
  • a buttonhole 147h is pierced in the pallet 147c where the latter is engaged on the pin 115 which thus ensures the guiding of the control lever 147 and prevents deformation outside the plane of the lever, when the latter is actuated.
  • V-shaped portion 147e extends above the rear part of the clamp 101 in order to hold it in place, and to prevent it from moving away from the plate 114 (see in particular the figures 5 and 6).
  • FIG. 7 partially represents a module 151A of a split-seconds chronograph intended to be adapted to a watch movement 151B of the current type, the control device according to the invention being incorporated in the first module 151A.
  • this module 151 A is built on the plate 114 to which the bridges 114 ′ and 139 are fixed. A center tube 153 is driven into the latter.
  • a chronograph heart 165 intended for resetting and conventionally designed is fixed on the mobile 155 above the pinion 159.
  • This mobile is driven by a seconds wheel 167 whose rotation is ensured conventionally from the watch movement 151B, with which the chronograph module 151A is associated.
  • This watch movement 151B is only very partially represented in FIG. 7.
  • the mobile 155 is traversed by an axial passage 169 in which is inserted the axis 105 which is part of the split-second mobile 103 and to which the wheel 102 is fixed as well as a needle 107.
  • the split-second wheel 102 is conventionally constructed (as shown in Figure 1). It is therefore equipped with a split-level lever 171 provided with its roller (not visible in FIG. 7), and with a spring support (also invisible) acting on this lever 171.
  • a split-heart 173 is fixed on the mobile 155 and cooperates with the lever 171 for the execution of the recovery operation.
  • the wheel 102 also cooperates with the clamp 101 forming part of the control device according to the invention.
  • FIG. 7 also shows that the split-second mobile is in axial abutment against a stone 175 embedded in a wheel 177 carried by a second mobile in the center 179 forming part of the watch module 151B to which the chronograph module 151A equipped with its device control according to the invention, is associated.
  • the central seconds mobile 179 pivots in a center tube 181 driven into the plate 183 of the watch module 151B.
  • a roadway mobile 185 provided with its road wheel 187, the arrangement being conventional.
  • the central seconds mobile 179 has, on the side of the chronograph module 151A, a length such that the wheel 177 which it carries can be easily adjusted axially. This possibility of adjustment makes it possible, despite the presence of inevitable manufacturing tolerances, to always adjust the axial support of the split-second mobile 103 at its fair value.
  • the association of any standard watch module with a serial chronograph module constructed as indicated above can then be made without risk of jamming or premature wear of the rotating elements of the center of the assembly.
  • control device The operation of the control device according to the invention is as follows.
  • the clamp 101 does not act on the split-second wheel 102.
  • the split-second mobile 103 and the chronograph mobile 155 are integral in rotation, the hands 107 and 157 being superimposed and moving together.
  • the roller of the lever 171 is located in the notch of the heart 173, there is axial coupling of the two mobiles.
  • the clamp 101 is kept open by the control device, the V-spring 143 of which acts on the deformable strip 113 by exerting a force in the direction of the arrow F4, that is to say perpendicular to the strip 113.
  • the strip is so find in a curved configuration, which spreads the legs 109 and 111 of the clamp which are relatively rigid in the plane thereof.
  • the spring 143 can exert the force F4 on the strip 113 thanks to the fact that its head 143c is in abutment against one of the high areas of the cam 142.
  • the two-stage mobile 141 on which this cam is fixed is kept immobilized in rotation thanks to the opposite branch 143b of the V-shaped spring 143, the end of which acts as a jumper and bears against a low range of the cam 142.
  • the presence of this V-shaped spring 143 is very important. Indeed, this spring makes it possible to transform the rotational movement of the cam 142 into a translational movement of the head 143c, and thus the force F4 is exerted perpendicularly to the strip 113. If this spring 143 was absent and if it was the cam 142 which exerted the force F4, the latter would not be perpendicular to the strip 113, due to the rotational movement of the cam 142.
  • the clamp 101 would risk not opening symmetrically.
  • the control device then passes from the configuration of FIG. 3 to that shown in FIG. 4. Indeed, the progression of one step of the mobile 141 reverses the position of the head 143c and of the jumper of the branch 143b relative to the cam 142, the head 143c descending on a low range thereof, and the branch 143b rising on a high range. Consequently, the cam is again immobilized in rotation, the head 143c acting as a jumper in this case.
  • the strip 113 tends to resume a rectilinear shape thereby bringing the branches 109 and 111 against the chronograph wheel 102.
  • the bringing together of the branches is simultaneous and symmetrical, which avoids any asymmetrical effort on the chronograph mobile 103 capable of tilting it.
  • the branches 109 and 111 of the clamp 101 prevent the mobile 103 from turning, which stops the needle 107 thus allowing the reading of the intermediate time.
  • the chronograph mobile 155 continues to rotate normally to indicate the current time using the hand 157.
  • the user again actuates the control lever 147d which advances the mobile 141 and the cam 142 by an additional step.
  • This spacing is also made symmetrically and simultaneously for the two branches thus avoiding any radial force on the wheel 102 of the chronograph mobile 103.
  • the mobile 103 is rotated by the force exerted by the lever 171 which rotates this wheel 102 until the roller falls back into the notch of the heart 173.
  • the needle 107 then caught up with the needle 157 to turn again in synchronism with it, the needles being rigorously superimposed.
  • each branch 109 and 111 of the clamp 101 is provided with an enlarged portion 129a, 129b, cooperating with a fixed pin 189 placed between the branches 109 and 111 and driven into the plate 114.
  • the portions 129a, 129b may have different lateral dimensions. This is the case in the embodiment shown in Figures 3 and 4.

Abstract

The invention relates to a fly-back hand chronograph equipped with a device for controlling stopping and starting of a fly-back hand. <??>The aim of the invention is to produce a control device which does not require precise and frequent adjustments and which prevents premature wear of the pieces of the fly-back hand runner. <??>This control device comprises a fly-back hand clamp (101), a fly-back hand runner (103) arranged between the free ends (133) of the two branches (109, 111) of the said clamp (101), two fixed reaction members (115, 117) against which bears the linking portion (113) between the two branches (109, 111) of the clamp and deformation means (135) creating a force acting against the said reaction members (115, 117) on the said linking portion (113) in order to deform the latter. <IMAGE>

Description

La présente invention concerne une pièce d'horlogerie du type chronographe à rattrapante, équipée d'un dispositif de commande de l'arrêt et de la mise en marche d'une aiguille de rattrapante.The present invention relates to a timepiece of the split-seconds chronograph type, equipped with a device for controlling the stopping and starting of a split-seconds hand.

Pour chronométrer un événement sportif tel que la course d'un coureur participant à une épreuve, on utilise généralement un chronographe mécanique ou électromécanique, comportant un mouvement d'horlogerie qui commande des organes d'affichage tels qu'une aiguille de secondes dite "aiguille de chronographe", un compteur des minutes et un compteur des heures. Grâce à ce chronographe, on peut alors déterminer le temps qu'a mis ce coureur pour effectuer un parcours donné.To time a sporting event such as the race of a runner taking part in an event, a mechanical or electromechanical chronograph is generally used, comprising a clockwork movement which controls display organs such as a second hand called a "hand" chronograph ", a minute counter and an hour counter. Thanks to this chronograph, we can then determine the time it took for this runner to complete a given route.

Toutefois, il s'avère généralement souhaitable de pouvoir mesurer avec le même chronographe, soit les temps respectifs de plusieurs coureurs participant à une même épreuve, soit le ou les temps intermédiaires de l'un des coureurs, ainsi que son temps final à l'arrivée. Or, un chronographe dans sa version la plus simple, par exemple un chronographe muni d'un unique poussoir, ne permet pas de mesurer plusieurs temps successifs, puisqu'il nécessite obligatoirement une remise à zéro de ses organes d'affichage après chaque mesure. On a donc recours dans ce cas à l'utilisation d'un chronographe muni d'une aiguille de secondes supplémentaire dite "aiguille de rattrapante". Lorsque l'on souhaite mesurer un premier temps intermédiaire, on peut arrêter à volonté et à n'importe quel moment l'aiguille de rattrapante, ce qui facilite la lecture, puis ensuite on peut faire "rattraper" à cette aiguille le temps écoulé pour qu'elle rejoigne l'aiguille de chronographe qui n'a pas cessé de tourner. On peut arrêter plusieurs fois l'aiguille de rattrpante pour faire d'autres mesures intermédiaires, ou bien faire une mesure du temps final en arrêtant l'aiguille de chronographe, les compteurs et l'aiguille de rattrapante si celle-ci n'est pas déjà arrêtée.However, it is generally desirable to be able to measure with the same chronograph, either the respective times of several runners participating in the same event, or the intermediate time or times of one of the runners, as well as his final time at the arrival. However, a chronograph in its simplest version, for example a chronograph provided with a single pusher, does not make it possible to measure several successive times, since it necessarily requires a reset of its display members after each measurement. We therefore have recourse in this case to the use of a chronograph provided with an additional seconds hand called "split-seconds hand". When you want to measure a first intermediate time, you can stop the catch-up hand at will and at any time, which makes it easier to read, and then you can make this hand "catch up" with the time elapsed for that it joins the chronograph hand which has not stopped turning. You can stop the ratter needle several times to make other intermediate measurements, or measure the final time by stopping the chronograph needle, the counters and the split-seconds hand if it is not already stopped.

Des chronographes avec aiguille de rattrapante ainsi que des dispositifs de commande de cette aiguille ont déjà été proposés et sont décrits par exemple dans la demande de brevet GB 2 008 291, dans l'exposé d'invention CH 38 824 et dans le livre de B. Humbert intitulé "Le chronographe" (chapitre 13), Edition Scriptar, La Conversion, Suisse, 1990.Chronographs with split-seconds hand as well as devices for controlling this hand have already been proposed and are described, for example, in patent application GB 2,008,291, in the disclosure of invention CH 38,824 and in the book by B Humbert entitled "Le chronographe" (chapter 13), Edition Scriptar, La Conversion, Suisse, 1990.

Les figures 1 et 2 annexées illustrent un chronographe équipé d'un dispositif de commande d'une aiguille de rattrapante selon le livre susmentionné de B. Humbert. Dans la vue en coupe de la figure 2, le côté cadran du chronographe est situé en haut. Le chronographe avec rattrapante est muni d'une roue de grande moyenne 1 formant partie d'un mobile 3 percé sur toute sa longueur, d'une roue de chronographe 5 dont le tube 7 pivote à l'intérieur du mobile 3 et d'une roue de rattrapante 9 dont l'axe 11 est ajusté librement à l'intérieur du tube 7.Figures 1 and 2 attached illustrate a chronograph equipped with a device for controlling a split-second hand according to the aforementioned book by B. Humbert. In the sectional view of Figure 2, the dial side of the chronograph is located at the top. The split-seconds chronograph is provided with a medium-sized wheel 1 forming part of a mobile 3 pierced over its entire length, a chronograph wheel 5 whose tube 7 pivots inside the mobile 3 and a split-second wheel 9 whose axis 11 is freely adjusted inside the tube 7.

Sur l'extrémité libre de l'axe 11 est fixée une aiguille de rattrapante 13 tandis que l'autre extrémité dudit axe est en butée contre une pierre 14 prévue dans un pont 16. Une aiguille de chronographe 15 est fixée à une extrémité du tube 7. A l'autre extrémité de ce tube est fixé un coeur 17, dit coeur de rattrapante qui est solidaire en rotation de la roue de chronographe 5. Par ailleurs, un coeur de chronographe 19 est fixé sur le tube 7 à flanc contre la roue de chronographe 5. Les différentes pièces du chronographe sont disposées de part et d'autre d'une platine de chronographe 21 et d'un pont 23.On the free end of the axis 11 is fixed a catch-up needle 13 while the other end of said axis is in abutment against a stone 14 provided in a bridge 16. A chronograph needle 15 is fixed at one end of the tube 7. At the other end of this tube is fixed a heart 17, called split-heart which is integral in rotation with the chronograph wheel 5. Furthermore, a chronograph heart 19 is fixed on the tube 7 against the side chronograph wheel 5. The various chronograph parts are arranged on either side of a chronograph plate 21 and a bridge 23.

Un levier 25 est monté pivotant sous une serge 27 (figure 1) de la roue de rattrapante 9 et pivote autour d'un axe 29. A l'extrémité libre de ce levier 25 est monté à rotation un galet 31, de préférence en rubis. Ce levier 25 est sollicité par un ressort 33 qui est également monté sur la serge 27. Grâce à ce ressort 33, le galet 31 est maintenu en contact permanent avec le pourtour du coeur de rattrapante 17.A lever 25 is pivotally mounted under a serge 27 (FIG. 1) of the split-second wheel 9 and pivots about an axis 29. At the free end of this lever 25 is rotatably mounted a roller 31, preferably in ruby . This lever 25 is biased by a spring 33 which is also mounted on the rim 27. Thanks to this spring 33, the roller 31 is kept in permanent contact with the periphery of the split-back core 17.

La roue de rattrapante 9 est disposée entre les deux branches 35 et 37 d'une pince de rattrapante 39 en U de façon que les extrémités de ces deux branches puissent pincer la roue 9 en deux endroits diamétralement opposés. Une roue à colonnes 41 est disposée entre les deux branches 35, 37 à la hauteur de leur région médiane. La roue à colonnes 41 présente dans sa partie supérieure (par rapport à la figure 1) c'est-à-dire dans sa partie dirigée vers le fond de la boîte de chronographe, une came 42 comportant huit colonnes 43 régulièrement réparties à sa périphérie et dans sa partie inférieure un rochet 44 pourvu de seize dents 45.The split-second wheel 9 is arranged between the two branches 35 and 37 of a split-grip pliers 39 in a U so that the ends of these two branches can pinch the wheel 9 in two diametrically opposite places. A column wheel 41 is disposed between the two branches 35, 37 at the height of their middle region. The column wheel 41 present in its upper part (with respect to FIG. 1), that is to say in its part directed towards the bottom of the chronograph case, a cam 42 comprising eight columns 43 regularly distributed around its periphery and in its lower part a ratchet 44 provided with sixteen teeth 45.

Cette roue à colonnes 41 peut être entraînée en rotation dans le sens de la flèche F1 par un cliquet 47 qui agit sur les dents 45. Ce cliquet 47 peut lui-même être actionné par une bascule 49 tout en étant soumis à l'action d'un ressort 51. La roue à colonnes 41 est bloquée en rotation par un sautoir 53 et la pince de rattrapante 39 pivote librement autour d'un tenon 55 monté sur un prolongement du pied du sautoir 53. Enfin, les deux branches 35 et 37 de la pince de rattrapante 39 sont munies de becs, respectivement 57 et 59 coopérant avec les colonnes 43.This column wheel 41 can be rotated in the direction of arrow F1 by a pawl 47 which acts on the teeth 45. This pawl 47 can itself be actuated by a rocker 49 while being subjected to the action of 'a spring 51. The column wheel 41 is locked in rotation by a jumper 53 and the split-second clamp 39 pivots freely around a tenon 55 mounted on an extension of the foot of the jumper 53. Finally, the two branches 35 and 37 of the split-second clamp 39 are provided with spouts, respectively 57 and 59 cooperating with the columns 43.

Lorsque la roue à colonnes 41 est entraînée en rotation, les deux branches 35 et 37 peuvent se déplacer entre deux positions. Dans une première position représentée à la figure 1, les becs 57 et 59 se trouvent respectivement entre deux colonnes 43 voisines, si bien que les branches 35 et 37 pincent la roue de rattrapante 9 et la bloquent. Dans une seconde position (non représentée) les becs 57, 59 sont respectivement en appui contre deux colonnes 43 diamétralement opposées, ce qui fait que les branches 35 et 37 sont écartées de la roue 9. Le passage de la première position des branches à la seconde se fait donc dans le sens des flèches F2.When the column wheel 41 is rotated, the two branches 35 and 37 can move between two positions. In a first position shown in Figure 1, the spouts 57 and 59 are respectively between two neighboring columns 43, so that the branches 35 and 37 pinch the split-wheel 9 and lock it. In a second position (not shown) the spouts 57, 59 are respectively in abutment against two diametrically opposite columns 43, which means that the branches 35 and 37 are separated from the wheel 9. The transition from the first position of the branches to the second therefore takes place in the direction of the arrows F2.

L'utilisation et le fonctionnement de ce dispositif de rattrapante sont les suivants.The use and operation of this split-second device are as follows.

Lorsque le chronographe fonctionne pour mesurer un temps, le galet 31 situé à l'extrémité du levier 25 est logé dans la coche 61 du coeur de rattrapante 17. En conséquence, lorsque la roue de chronographe 5 tourne en avançant par pas, entraînée par une roue motrice non représentée, elle entraîne non seulement le tube 7, le coeur de rattrapante 17 et l'aiguille de chronographe 15, mais également la roue de rattrapante 9 par l'intermédiaire du levier 25. La roue de rattrapante 9 tourne en synchronisme avec la roue de chronographe 5 et les deux aiguilles 13 et 15 tournent simultanément et sont superposées l'une à l'autre.When the chronograph operates to measure a time, the roller 31 located at the end of the lever 25 is housed in the notch 61 of the split-second heart 17. Consequently, when the chronograph wheel 5 rotates by advancing in steps, driven by a driving wheel not shown, it drives not only the tube 7, the split-heart 17 and the chronograph hand 15, but also the split-wheel 9 by means of the lever 25. The split-wheel 9 rotates in synchronism with the chronograph wheel 5 and the two hands 13 and 15 rotate simultaneously and are superposed on each other.

Lorsque l'utilisateur souhaite lire un temps intermédiaire, il exerce une pression dans le sens de la flèche F3 sur la bascule 49. Ceci a pour effet de faire tourner d'un pas la roue à colonnes 41 (flèche F1) et de l'amener dans la position représentée à la figure 1. La pince de rattrapante 39 bloque alors la roue de rattrapante 9 ainsi que le pivot 11 et l'aiguille de rattrapante 13, ce qui permet la lecture du temps intermédiaire. Pendant cette manipulation, la roue de chronographe 5, l'aiguille de chronographe 15 et le coeur de rattrapante 17 continuent de tourner pas à pas.When the user wishes to read an intermediate time, he exerts a pressure in the direction of arrow F3 on the lever 49. This has the effect of turning the column wheel 41 by one step. (arrow F1) and bring it into the position shown in FIG. 1. The split-second clamp 39 then blocks the split-wheel 9 as well as the pivot 11 and the split-second needle 13, which allows the reading of the time intermediate. During this manipulation, the chronograph wheel 5, the chronograph hand 15 and the split-second heart 17 continue to rotate step by step.

Comme la roue de rattrapante 9 et son levier 25 sont bloqués alors que le coeur de rattrapante 17 continue de tourner, le galet 31 sort de la coche 61 tout en restant appuyé sur le pourtour du coeur 17 grâce au ressort 33.As the split-second wheel 9 and its lever 25 are blocked while the split-second core 17 continues to rotate, the roller 31 comes out of the notch 61 while remaining pressed on the periphery of the core 17 thanks to the spring 33.

Après avoir lu le temps intermédiaire, l'utilisateur exerce une seconde pression sur la bascule 49. Ceci a pour effet de faire tourner la roue à colonnes 41 d'un pas supplémentaire et d'écarter les bras 35 et 37 de la pince 39. La roue de rattapante 9 est liberée et tourne jusqu'à ce que le galet 31 du levier 25 se trouve de nouveau dans la coche 61 sous l'action du ressort 33 qui a été bandé lors de la rotation de la roue de rattrapante. Les deux aiguilles 13 et 15 recommencent alors à tourner ensemble.After having read the intermediate time, the user exerts a second pressure on the lever 49. This has the effect of rotating the column wheel 41 by an additional step and of spreading the arms 35 and 37 of the clamp 39. The split-second wheel 9 is released and rotates until the roller 31 of the lever 25 is again in the notch 61 under the action of the spring 33 which was bandaged during the rotation of the split-wheel. The two needles 13 and 15 then start to rotate again.

La multiplicité des aiguilles qui doivent être entraînées par des mobiles situés au centre d'un chronographe oblige l'horloger-constructeur à prendre certaines précautions quant à la construction de ce centre.The multiplicity of hands which must be driven by mobiles located in the center of a chronograph obliges the watchmaker-manufacturer to take certain precautions with regard to the construction of this center.

En observant la figure 2, on voit, en effet, que ces mobiles ont des longueurs importanes comparées à leur diamètre et aux jeux radiaux qui les séparent les uns des autres. Si un mobile, pour une raison quelconque vient frotter contre le mobile coaxialement adjacent, il risque au pire de ne plus tourner, les forces motrices qui les animent étant par construction extrêmement faibles. Au mieux, il y a alors usure prématurée de ces mobiles.By observing FIG. 2, we see, in fact, that these mobiles have significant lengths compared to their diameter and to the radial clearances which separate them from each other. If a mobile, for whatever reason, rubs against the coaxially adjacent mobile, it risks at worst not rotating any more, the driving forces which drive them being by construction extremely weak. At best, there is then premature wear of these mobiles.

Pour éviter ces difficultés, la précaution que prend l'horloger-constructeur consiste à prévoir des portées entre les mobiles uniquement à une extrémité de ceux-ci (c'est-à-dire généralement près des aiguilles) comme cela est représenté à la figure 2. L'extrémité opposée du mobile est alors en appui uniquement sur une butée axiale (pierre 14, figure 2) sans être maintenue radialement. Les mobiles en question pouvant ainsi s'ajuster d'eux-mêmes radialement les uns dans les autres sans qu'il en résulte une usure prématurée voire un blocage en rotation.To avoid these difficulties, the precaution taken by the watchmaker-manufacturer consists in providing spans between the mobiles only at one end of them (that is to say generally near the hands) as shown in the figure. 2. The opposite end of the mobile is then supported only on an axial stop (stone 14, Figure 2) without being held radially. The mobiles in question can thus adjust themselves radially one inside the other without resulting in premature wear or even blocking in rotation.

Dès lors, on comprend que la pince de rattrapante décrite ci-dessus apporte un problème supplémentaire. En effet, à supposer que cette pince ne travaille pas rigoureusement avec symétrie sur la roue de rattrapante 9, celle-ci tend à s'incliner et à placer de biais le mobile qui la porte. L'axe 11 risque alors sinon de se bloquer, du moins de frotter à l'intérieur du tube 7 entraînant une usure prématurée de ces pièces. Il faut alors procéder de nouveau à un réglage. Ce risque est d'autant plus important que l'axe 11 à une longueur considérable comparée à son diamètre.Therefore, it is understood that the split-second pliers described above brings an additional problem. Indeed, supposing that this clamp does not work rigorously with symmetry on the split-second wheel 9, the latter tends to tilt and place the mobile carrying it at an angle. The axis 11 then risks otherwise blocking, at least rubbing inside the tube 7 resulting in premature wear of these parts. An adjustment must then be made again. This risk is all the more important as the axis 11 has a considerable length compared to its diameter.

Ce problème d'inclinaison de l'axe 11 due à la pince 39 survient notamment dès qu'il existe un léger défaut dans les dimensions des colonnes 43. En effet, si l'une des colonnes ne coïncide pas ou plus, avec la périphérie de la came 42, elle n'écarte pas ou pas assez la branche correspondante lorsqu'elle se trouve en face de celle-ci. L'autre branche exercera alors une force résiduelle radiale sur la roue de rattrapante 9. Or, ces différences dans les dimensions des colonnes 43 sont difficiles à éviter du fait des tolérances de fabrication et de l'usure. Ce dispositif de commande est donc fragile et pour éviter des difficultés doit être réglé avec une grande précision non seulement à la fabrication mais également ultérieurement pour compenser les effets de l'usure.This problem of inclination of the axis 11 due to the clamp 39 occurs in particular as soon as there is a slight defect in the dimensions of the columns 43. In fact, if one of the columns does not coincide or no longer coincides with the periphery of the cam 42, it does not separate or not enough the corresponding branch when it is opposite it. The other branch will then exert a residual radial force on the split-second wheel 9. However, these differences in the dimensions of the columns 43 are difficult to avoid because of manufacturing tolerances and wear. This control device is therefore fragile and to avoid difficulties must be adjusted with great precision not only during manufacture but also later to compensate for the effects of wear.

Le document CH 38 824 présente des inconvénients de même nature et d'autres en plus étant donné que ce qui sert de pince de rattrapante est formé de deux branches indépendantes fixées par des vis.Document CH 38 824 has drawbacks of the same nature and others in addition since what serves as a split-second clamp is formed by two independent branches fixed by screws.

L'invention a pour but de remédier aux inconvénients susmentionnés.The invention aims to remedy the aforementioned drawbacks.

L'invention a donc pour objet une pièce d'horlogerie du type chronographe à rattrapante, équipée d'un dispositif de commande de l'arrêt et de la marche d'une aiguille de rattrapante, la pièce comprenant un mobile de rattrapante solidaire de ladite aiguille de rattrapante, une pince de rattrapante d'une seule pièce revêtant sensiblement la forme d'un U avec deux branches dont deux extrémités respectives sont reliées par une portion de liaison, le mobile de rattrapante étant disposé entre les extrémités libres des deux branches, et des moyens destinés à déformer ladite pince de manière qu'elle puisse assumer deux configurations, à savoir une première configuration dite fermée, dans laquelle chaque branche de la pince exerce une force radiale sur le pourtour du mobile de rattrapante de façon à bloquer ce dernier, et une seconde configuration, dite ouverte, dans laquelle les deux branches de la pince ne sont pas en contact avec le mobile de rattrapante de façon à laisser ce dernier libre et à autoriser la marche de ladite aiguille de rattrapante, cette pièce étant caractérisée en ce qu'elle comprend en outre deux organes de réaction fixes contre lesquels est appuyé un premier côté de ladite portion de liaison et en ce que lesdits moyens de déformation comprennent des moyens pour engendrer une force de déformation agissant à l'encontre desdits organes de réaction, sur un deuxième côté de ladite portion de liaison opposé audit premier côté, et dans une zone située entre ces organes de réaction, cette portion de liaison étant conformée de manière à présenter, dans le plan de la pince, une faculté de déformation élastique, sous l'action de ladite force de déformation, suffisante pour permettre l'ouverture de ladite pince par un écartement de ses deux branches pivotant respectivement autour des deux organes de réaction de manière à libérer ledit mobile de rattrapante.The subject of the invention is therefore a timepiece of the split-seconds chronograph type, equipped with a device for controlling the stopping and running of a split-seconds hand, the piece comprising a split-seconds mobile fixed to said split-second needle, one-piece split-second pliers substantially taking the shape of a U with two branches, two respective ends of which are connected by a connecting portion, the split-second mobile being disposed between the free ends of the two branches, and means for deforming said clamp so that it can assume two configurations, namely a first configuration called closed, in which each branch of the clamp exerts a radial force on the periphery of the split-second mobile so as to block the latter, and a second configuration, called open, in which the two arms of the clamp are not in contact with the split-second mobile so as to leave the latter free and to authorize the running of said split-second needle, this part being characterized in that it further comprises two organs of fixed reactions against which a first side of said connection portion is pressed and in that said deformation means comprise means for generating a deformation force acting against said reaction members, on a second side of said connection portion opposite to said first side, and in a zone situated between these reaction members, this connecting portion being shaped so as to to present, in the plane of the clamp, an elastic deformation faculty, under the action of said deformation force, sufficient to allow the opening of said clamp by a spacing of its two branches pivoting respectively around the two members of reaction so as to release said split-second mobile.

Grâce à ces caractéristiques, le dispositif de commande est capable d'écarter simultanément les branches du mobile de rattrapante et de les en rapprocher également simultanément ce qui évite tout effort radial asymétrique sur le mobile de rattrapante dans une mesure beaucoup moindre que dans le dispositif selon CH-A-38 824.Thanks to these characteristics, the control device is capable of simultaneously spreading the branches of the split-second mobile and also bringing them together simultaneously, which avoids any asymmetrical radial force on the split-second mobile to a much lesser extent than in the device according to CH-A-38 824.

En effet, les moyens pour engendrer une force de déformation sur la portion de liaison ont une action conjointe sur les deux branches de la pince, cette action étant simultanée sur les deux branches car elle résulte de la seule application de la force de déformation sur un même élément constitué par la portion de liaison.Indeed, the means for generating a deformation force on the connecting portion have a joint action on the two branches of the clamp, this action being simultaneous on the two branches because it results from the sole application of the deformation force on a same element constituted by the connecting portion.

On notera ici que la force de déformation est avantageusement appliquée au milieu de la portion de liaison comprise entre les deux organes de réaction. Toutefois, le résultat reste semblable dans toute une région médiane centrée sur le milieu de cette portion de liaison, cette région médiane étant supérieure aux tolérances habituelles, pour un mouvement horloger mécanique, dans le positionnement d'un élément tels une roue à colonne, un cliquet, un levier d'actionnement, etc.It will be noted here that the deformation force is advantageously applied in the middle of the portion of link between the two reaction bodies. However, the result remains similar throughout a central region centered on the middle of this connecting portion, this central region being greater than the usual tolerances, for a mechanical watch movement, in the positioning of an element such as a column wheel, a ratchet, operating lever, etc.

L'invention sera mieux comprise à la lecture de la description suivante, donnée à titre d'exemple illustratif mais non limitatif et des dessins joints dans lesquels :

  • la figure 1 illustre une vue de dessous d'un dispositif de commande d'une aiguille de rattrapante pour chronographe selon l'art antérieur,
  • la figure 2 est une vue en coupe selon la ligne II-II de la figure 1,
  • les figures 3 et 4 sont des vues de dessus du dispositif de commande selon l'invention, les pièces se trouvant au-dessus de la roue de rattrapante n'étant pas représentées,
  • les figures 3A et 3B montrent séparément deux organes essentiels du dispositif de commande suivant l'invention,
  • la figure 5 est une vue en coupe et à plus grande échelle selon la ligne V-V de la figure 4,
  • la figure 6 est une vue selon la ligne VI-VI de la figure 3, à une échelle plus grande, et,
  • la figure 7 est une vue en coupe et à une échelle encore plus grande selon la ligne VII-VII de la figure 3.
The invention will be better understood on reading the following description, given by way of illustrative but nonlimiting example and of the attached drawings in which:
  • FIG. 1 illustrates a bottom view of a device for controlling a split-seconds hand for a chronograph according to the prior art,
  • FIG. 2 is a sectional view along the line II-II of FIG. 1,
  • FIGS. 3 and 4 are top views of the control device according to the invention, the parts being above the split-back wheel not being shown,
  • FIGS. 3A and 3B show separately two essential members of the control device according to the invention,
  • FIG. 5 is a sectional view on a larger scale along the line VV of FIG. 4,
  • FIG. 6 is a view along the line VI-VI of FIG. 3, on a larger scale, and,
  • FIG. 7 is a sectional view on an even larger scale along the line VII-VII of FIG. 3.

Conformément au mode de réalisation de l'invention représenté aux figures 3 à 7, le dispositif de commande comprend une pince de rattrapante 101 destiné à coopérer avec la roue 102 du mobile de rattrapante 103 d'un chronographe. Ce mobile 103 est muni d'un pivot 105 à l'extrémité duquel est fixée une aiguille de rattrapante 107 (représentée uniquement sur la figure 7). La pince de rattrapante 101, réalisée en une seule pièce présente la forme générale d'un U avec deux branches 109 et 111 reliées par une lamelle 113 formant portion de liaison. La roue 102 du mobile de rattrapante 103 est disposée entre les extrémités libres des branches 109 et 111.According to the embodiment of the invention shown in Figures 3 to 7, the control device comprises a clamp split-second 101 intended to cooperate with the wheel 102 of the split-second mobile 103 of a chronograph. This mobile 103 is provided with a pivot 105 at the end of which is a catch-up needle 107 (shown only in FIG. 7). The split-second pliers 101, made in one piece has the general shape of a U with two branches 109 and 111 connected by a strip 113 forming a connecting portion. The wheel 102 of the split-second mobile 103 is disposed between the free ends of the branches 109 and 111.

Le dispositif de commande est monté sur une platine 114 dans laquelle sont chassées deux goupilles 115 et 117 faisant office d'organes de réaction.The control device is mounted on a plate 114 in which are driven two pins 115 and 117 acting as reaction members.

La pince 101 présente dans ses zones de raccordement entre les branches 109 et 111 et la portion de liaison ou lamelle 113, des portions arquées de connexion 119 et 121 qui passent autour des goupilles respectives 115 et 117 sur un angle d'environ 270°, conférant ainsi une bonne assise à la pince 101.The clamp 101 has in its connection zones between the branches 109 and 111 and the connection portion or lamella 113, arcuate connection portions 119 and 121 which pass around the respective pins 115 and 117 at an angle of approximately 270 °, thus giving the gripper 101 a good seat.

Chaque branche 109, 111 comporte en outre en allant dans la direction de son extrémité libre, une portion coudée 123 la ramenant vers l'autre branche, une portion rectiligne 125 dans laquelle est prévue un décrochement 127, une portion élargie 129a, 129b et une portion arquée 131 s'étendant vers l'extérieur de la pince suivie d'une portion rectiligne active 133 qui vient tangenter la périphérie de la roue 102.Each branch 109, 111 further comprises, going in the direction of its free end, a bent portion 123 bringing it towards the other branch, a straight portion 125 in which a recess 127 is provided, an enlarged portion 129a, 129b and a arcuate portion 131 extending towards the outside of the clamp followed by an active rectilinear portion 133 which tangents the periphery of the wheel 102.

Les parties de chaque branche situées de part et d'autre du décrochement 127 s'étendent dans des plans différents, celles situées du côté du mobile 103 étant le plus éloignées de la platine.The parts of each branch located on either side of the recess 127 extend in different planes, those located on the side of the mobile 103 being the furthest from the plate.

On notera également qu'à partir de chaque portion arguée 119, 121 chaque branche présente une largeur l1 supérieure à la largeur l2 de la portion de liaison 113. De cette manière, les branches 109 et 111 présentent dans le plan de la pince une raideur nettement plus grande que cette portion de liaison 113 dans laquelle se concentre la déformation de la pince, lorsque celle-ci est sollicitée pour libérer le mobile 103.It will also be noted that from each argued portion 119, 121 each branch has a width l 1 greater than the width l 2 of the connecting portion 113. In this way, the branches 109 and 111 have in the plane of the clamp a stiffness markedly greater than this connecting portion 113 in which the deformation of the clamp is concentrated, when the latter is urged to release the mobile 103.

On verra par la suite comment celle-ci est maintenue en place dans la direction perpendiculaire à son propre plan.We will see later how it is held in place in the direction perpendicular to its own plane.

Le dispositif de commande comprend également des moyens de déformation 135 dont la construction est la suivante.The control device also comprises deformation means 135, the construction of which is as follows.

Une goupille 137 est chassée dans la platine 114 et maintenue à son autre extrémité par un pont 114'.A pin 137 is driven into the plate 114 and held at its other end by a bridge 114 '.

Autour de cette goupille 137 est monté à rotation un mobile 141 à deux étages 141a et 141b. Le premier étage 141a situé le plus près de la platine 114 porte une came 142, à cinq portées par exemple, tandis que le deuxième étage forme un rochet 141b ayant ici dix dents triangulaires.Around this pin 137 is rotatably mounted a mobile 141 with two stages 141a and 141b. The first stage 141a located closest to the plate 114 carries a cam 142, with five spans for example, while the second stage forms a ratchet 141b here having ten triangular teeth.

La came 142 est prévue dans le plan de la pince 101.The cam 142 is provided in the plane of the clamp 101.

Le dispositif de commande comporte également un organe 143 de poussée et de positionnement formé par un ressort en V (figure 3A) dont la pointe est montée de façon à pouvoir pivoter autour d'une goupille 145 chassée dans la platine 114.The control device also includes a thrust and positioning member 143 formed by a V-shaped spring (FIG. 3A) the tip of which is mounted so as to be able to pivot around a pin 145 driven into the plate 114.

Une première branche 143a de ce ressort en V s'étend à partir de la goupille 145 jusqu'à un intervalle ménagé entre la came 142 et la lamelle déformable 113 de la pince 101. L'extrémité libre de cette branche est conformée de manière à constituer une tête 143c de transmission de mouvement qui est en contact élastique avec le profil de la came 142 tout en étant également en contact élastique avec la lamelle déformable 113.A first branch 143a of this V-shaped spring extends from the pin 145 to a gap formed between the cam 142 and the deformable strip 113 of the clamp 101. The free end of this branch is shaped so as to constitute a movement transmission head 143c which is in elastic contact with the profile of the cam 142 while also being in elastic contact with the deformable strip 113.

La branche opposée 143b de l'organe 143 de poussée et de positionnement forme sautoir pour bloquer le mobile 141 et la came 142 en rotation, lorsque le dispositif de commande est actif (figure 3). Dans le cas contraire, c'est l'autre branche 143a de l'organe 143 qui assure le blocage en rotation du mobile 141.The opposite branch 143b of the pushing and positioning member 143 jumper-shaped to block the mobile 141 and the cam 142 in rotation, when the control device is active (FIG. 3). Otherwise, it is the other branch 143a of the member 143 which ensures the rotation blocking of the mobile 141.

Le dispositif de commande comporte encore un levier de commande 147 (figure 3B), formé par une lame recourbée fixée par une première portion d'extrémité 147a à la goupille 145 et à une autre goupille 149 située à une certaine distance de cette dernière et également chassée dans la platine 114.The control device also comprises a control lever 147 (FIG. 3B), formed by a curved blade fixed by a first end portion 147a to the pin 145 and to another pin 149 situated at a certain distance from the latter and also driven into the plate 114.

Une portion étroite 147b déformable élastiquement s'étend à partir de la goupille 149 en direction du mobile 141 où elle est prolongée par une palette 147c plus large et plus rigide s'étendant à peu près à angle droit dans le même plan que la portion étroite 147b.A narrow portion 147b elastically deformable extends from the pin 149 in the direction of the mobile 141 where it is extended by a wider and more rigid pallet 147c extending approximately at right angles in the same plane as the narrow portion 147b.

Une patte 147d recourbée hors du plan du levier de commande est destinée à coopérer avec un bouton-poussoir (non représenté) situé à l'extérieur de la boîte du chronographe (voir en particulier la figure 5).A tab 147d bent out of the plane of the control lever is intended to cooperate with a push button (not shown) located at the outside of the chronograph case (see in particular Figure 5).

La palette 147c est raccordée à une portion d'actionnement 147e en forme de V dont la branche libre 147f comporte une tête en forme de crochet 147g destiné à agir sur le rochet 141b.The pallet 147c is connected to an actuating portion 147e in the form of a V, the free branch 147f of which has a hook-shaped head 147g intended to act on the ratchet 141b.

Une boutonnière 147h est percée dans la palette 147c où celle-ci est engagée sur la goupille 115 qui assure ainsi le guidage du levier de commande 147 et évite une déformation hors du plan du levier, lorsque celui-ci est actionné.A buttonhole 147h is pierced in the pallet 147c where the latter is engaged on the pin 115 which thus ensures the guiding of the control lever 147 and prevents deformation outside the plane of the lever, when the latter is actuated.

Par ailleurs, la portion en V 147e s'étend au-dessus de la partie arrière de la pince 101 afin de la maintenir en place, et d'éviter qu'elle ne s'éloigne de la platine 114 (voir en particulier les figures 5 et 6).Furthermore, the V-shaped portion 147e extends above the rear part of the clamp 101 in order to hold it in place, and to prevent it from moving away from the plate 114 (see in particular the figures 5 and 6).

La figure 7 représente partiellement un module 151A de chronographe à rattrapante destiné à être adapté sur un mouvement de montre 151B de type courant, le dispositif de commande suivant l'invention étant incorporé dans le premier module 151A.FIG. 7 partially represents a module 151A of a split-seconds chronograph intended to be adapted to a watch movement 151B of the current type, the control device according to the invention being incorporated in the first module 151A.

Comme indiqué précédemment ce module 151 A est construit sur la platine 114 à laquelle sont fixés les ponts 114' et 139. Un tube de centre 153 est chassé dans ce dernier.As previously indicated, this module 151 A is built on the plate 114 to which the bridges 114 ′ and 139 are fixed. A center tube 153 is driven into the latter.

A l'intérieur du tube de centre 153 tourillonne un mobile 155 dont une extrémité porte l'aiguille de chronographe 157 et dont l'autre extrémité porte un pignon de chronographe 159 et se termine par une portée 161 tourillonnant dans un palier 163 reçu dans le pont 114'. Un coeur de chronographe 165 destiné à la remise à zéro et conçu de façon classique est fixé sur le mobile 155 au-dessus du pignon 159. Ce mobile est entraîné par une roue de secondes 167 dont la rotation est assurée de façon classique à partir du mouvement de montre 151B, auquel le module de chronographe 151A est associé. Ce mouvement de montre 151B n'est que très partiellement représenté à la figure 7.Inside the center tube 153 journals a mobile 155, one end of which carries the chronograph hand 157 and the other end of which carries a chronograph pinion 159 and ends with a bearing 161 which is journalled in a bearing 163 received in the deck 114 '. A chronograph heart 165 intended for resetting and conventionally designed is fixed on the mobile 155 above the pinion 159. This mobile is driven by a seconds wheel 167 whose rotation is ensured conventionally from the watch movement 151B, with which the chronograph module 151A is associated. This watch movement 151B is only very partially represented in FIG. 7.

Le mobile 155 est traversé par un passage axial 169 dans lequel est inséré l'axe 105 qui fait partie du mobile de rattrapante 103 et auquel est fixé la roue 102 ainsi qu'une aiguille 107. La roue de rattrapante 102 est construite de façon classique (comme représenté à la figure 1). Elle est donc équipée d'un levier de rattrapante 171 muni de son galet (non visible sur la figure 7), et d'un ressort d'appui (également invisible) agissant sur ce levier 171. Un coeur de rattrapante 173 est fixé sur le mobile 155 et coopère avec le levier 171 pour l'exécution de l'opération de rattrapage.The mobile 155 is traversed by an axial passage 169 in which is inserted the axis 105 which is part of the split-second mobile 103 and to which the wheel 102 is fixed as well as a needle 107. The split-second wheel 102 is conventionally constructed (as shown in Figure 1). It is therefore equipped with a split-level lever 171 provided with its roller (not visible in FIG. 7), and with a spring support (also invisible) acting on this lever 171. A split-heart 173 is fixed on the mobile 155 and cooperates with the lever 171 for the execution of the recovery operation.

Bien entendu, la roue 102 coopère également avec la pince 101 faisant partie du dispositif de commande suivant l'invention.Of course, the wheel 102 also cooperates with the clamp 101 forming part of the control device according to the invention.

La figure 7 montre étalement que le mobile de rattrapante est en butée axiale contre une pierre 175 enchassée dans une roue 177 portée par un mobile de seconde au centre 179 formant partie du module de montre 151B auquel le module de chronographe 151A équipé de son dispositif de commande selon l'invention, est associé.FIG. 7 also shows that the split-second mobile is in axial abutment against a stone 175 embedded in a wheel 177 carried by a second mobile in the center 179 forming part of the watch module 151B to which the chronograph module 151A equipped with its device control according to the invention, is associated.

Le mobile de seconde au centre 179 tourillonne dans un tube de centre 181 chassé dans la platine 183 du module de montre 151B. Autour du tube de centre 181 tourillonne un mobile de chaussée 185 munie de sa roue de chaussée 187, la disposition étant classique.The central seconds mobile 179 pivots in a center tube 181 driven into the plate 183 of the watch module 151B. Around the center tube 181 pivots a roadway mobile 185 provided with its road wheel 187, the arrangement being conventional.

Toutefois, selon une caractéristique particulière de l' invention, le mobile de seconde au centre 179 présente, du côté du module de chronographe 151A, une longueur telle que la roue 177 qu'il porte puisse être facilement ajustée axialement. Cette possibilité d'ajustement permet, en dépit de la présence de tolérances inévitables de fabrication, de toujours régler l'appui axial du mobile de rattrapante 103 à sa juste valeur. L'association d'un module de montre quelconque de série avec un module de chronographe de série construit comme indiqué ci-dessus, peut alors être faite sans risque de coincement ou d'usure prématurée des éléments tournants du centre de l'ensemble.However, according to a particular characteristic of the invention, the central seconds mobile 179 has, on the side of the chronograph module 151A, a length such that the wheel 177 which it carries can be easily adjusted axially. This possibility of adjustment makes it possible, despite the presence of inevitable manufacturing tolerances, to always adjust the axial support of the split-second mobile 103 at its fair value. The association of any standard watch module with a serial chronograph module constructed as indicated above can then be made without risk of jamming or premature wear of the rotating elements of the center of the assembly.

Le fonctionnement du dispositif de commande suivant l'invention est le suivant.The operation of the control device according to the invention is as follows.

Dans la situation représentée à la figure 3, la pince 101 n'agit pas sur la roue de rattrapante 102. Cela veut dire que le mobile de rattrapante 103 et le mobile de chronographe 155 sont solidaires en rotation, les aiguilles 107 et 157 étant superposées et se déplaçant de concert. En effet, comme le galet du levier 171 est situé dans la coche du coeur 173, il y a couplage axial des deux mobiles.In the situation represented in FIG. 3, the clamp 101 does not act on the split-second wheel 102. This means that the split-second mobile 103 and the chronograph mobile 155 are integral in rotation, the hands 107 and 157 being superimposed and moving together. Indeed, as the roller of the lever 171 is located in the notch of the heart 173, there is axial coupling of the two mobiles.

La pince 101 est maintenue ouverte par le dispositif de commande dont le ressort en V 143 agit sur la lamelle déformable 113 en exerçant une force dans le sens de la flèche F4 c'est-à-dire perpendiculairement à la lamelle 113. La lamelle se trouve donc dans une configuration cintrée, ce qui écarte les branches 109 et 111 de la pince qui sont relativement rigides dans le plan de celles-ci.The clamp 101 is kept open by the control device, the V-spring 143 of which acts on the deformable strip 113 by exerting a force in the direction of the arrow F4, that is to say perpendicular to the strip 113. The strip is so find in a curved configuration, which spreads the legs 109 and 111 of the clamp which are relatively rigid in the plane thereof.

Le ressort 143 peut exercer la force F4 sur la lamelle 113 grâce au fait que sa tête 143c est en appui contre l'une des plages hautes de la came 142. Le mobile 141 à deux étages sur lequel est fixé cette came, est maintenu immobilisé en rotation grâce à la branche opposée 143b du ressort en V 143 dont l'extrémité agit comme sautoir et est en appui contre une plage basse de la came 142. La présence de ce ressort en V 143 est très importante. En effet, ce ressort permet de transformer le mouvement de rotation de la came 142 en un mouvement de translation de la tête 143c, et ainsi la force F4 s'exerce perpendiculairement à la lamelle 113. Si ce ressort 143 était absent et si c'était la came 142 qui exerçait la force F4, cette dernière ne serait pas perpendiculaire à la lamelle 113, du fait du mouvement de rotation de la came 142. La pince 101 risquerait de ne pas s'ouvrir de façon symétrique.The spring 143 can exert the force F4 on the strip 113 thanks to the fact that its head 143c is in abutment against one of the high areas of the cam 142. The two-stage mobile 141 on which this cam is fixed, is kept immobilized in rotation thanks to the opposite branch 143b of the V-shaped spring 143, the end of which acts as a jumper and bears against a low range of the cam 142. The presence of this V-shaped spring 143 is very important. Indeed, this spring makes it possible to transform the rotational movement of the cam 142 into a translational movement of the head 143c, and thus the force F4 is exerted perpendicularly to the strip 113. If this spring 143 was absent and if it was the cam 142 which exerted the force F4, the latter would not be perpendicular to the strip 113, due to the rotational movement of the cam 142. The clamp 101 would risk not opening symmetrically.

On suppose maintenant que l'utilisateur du chronographe veuille lire un temps intermédiaire du temps total à chronométrer.It is now assumed that the user of the chronograph wants to read an intermediate time of the total time to be timed.

A cet effet, il doit agir, par un bouton-poussoir non représenté, sur la patte recourbée 147d du levier de commande 147 dans le sens de la flèche F5. Cette action a pour effet de faire pivoter ce levier grâce à la déformation élastique de sa branche 147b, le mouvement étant guidé grâce à la goupille 115. Le pivotement du levier de commande 147 a pour effet de faire tourner le mobile 141 d'un pas dont l'amplitude est déterminé par la largeur des dents du rochet 141b.To this end, it must act, by a push button not shown, on the curved tab 147d of the control lever 147 in the direction of arrow F5. This action has the effect of pivoting this lever by virtue of the elastic deformation of its branch 147b, the movement being guided by the pin 115. The pivoting of the control lever 147 has the effect of rotating the mobile 141 by one step the amplitude of which is determined by the width of the ratchet teeth 141b.

Le dispositif de commande passe alors de la configuration de la figure 3 à celle représentée sur la figure 4. En effet, la progression d'un pas du mobile 141 inverse la position de la tête 143c et du sautoir de la branche 143b par rapport à la came 142, la tête 143c descendant sur une plage basse de celle-ci, et la branche 143b montant sur une plage haute. Par conséquent, la came est de nouveau immobilisée en rotation, la tête 143c faisant office de sautoir dans ce cas.The control device then passes from the configuration of FIG. 3 to that shown in FIG. 4. Indeed, the progression of one step of the mobile 141 reverses the position of the head 143c and of the jumper of the branch 143b relative to the cam 142, the head 143c descending on a low range thereof, and the branch 143b rising on a high range. Consequently, the cam is again immobilized in rotation, the head 143c acting as a jumper in this case.

Il en résulte que la lamelle 113 tend à reprendre une forme rectiligne rapprochant par là-même les branches 109 et 111 contre la roue de chronographe 102.As a result, the strip 113 tends to resume a rectilinear shape thereby bringing the branches 109 and 111 against the chronograph wheel 102.

Le rapprochement des branches est simultané et symétrique ce qui évite tout effort asymétrique sur le mobile de chronographe 103 susceptible de l'incliner.The bringing together of the branches is simultaneous and symmetrical, which avoids any asymmetrical effort on the chronograph mobile 103 capable of tilting it.

Les branches 109 et 111 de la pince 101 empêchent le mobile 103 de tourner, ce qui arrête l'aiguille 107 permettant ainsi la lecture du temps intermédiaire. En revanche, le mobile de chronographe 155 continue de tourner normalement pour indiquer le temps en cours à l'aide de l'aiguille 157.The branches 109 and 111 of the clamp 101 prevent the mobile 103 from turning, which stops the needle 107 thus allowing the reading of the intermediate time. On the other hand, the chronograph mobile 155 continues to rotate normally to indicate the current time using the hand 157.

Pendant cette rotation, de façon classique le galet du levier quitte la coche du coeur 173.During this rotation, conventionally the roller of the lever leaves the check mark of the heart 173.

Après lecture du temps intermédiaire, l'utilisateur actionne de nouveau le levier de commande 147d ce qui fait avancer le mobile 141 et la came 142 d'un pas supplémentaire. Il en résulte une inversion des positions de la tête 143c et du sautoir 143 b du ressort en V 143 ramenant le dispositif de commande dans la configuration représentée à la figure 3. Par conséquent, la lamelle 113 est de nouveau cintrée ce qui écarte les branches 109 et 111 de la pince 101. Cet écartement se fait également symétriquement et simultanément pour les deux branches évitant ainsi tout effort radial sur la roue 102 du mobile de chronographe 103.After reading the intermediate time, the user again actuates the control lever 147d which advances the mobile 141 and the cam 142 by an additional step. This results in an inversion of the positions of the head 143c and of the jumper 143b of the V-shaped spring 143 bringing the control device back to the configuration shown in FIG. 3. Consequently, the strip 113 is again bent, which spreads the branches 109 and 111 of the clamp 101. This spacing is also made symmetrically and simultaneously for the two branches thus avoiding any radial force on the wheel 102 of the chronograph mobile 103.

Dès que la roue 102 est libérée, le mobile 103 est entraîné en rotation par la force exercée par le levier 171 qui fait tourner cette roue 102 jusqu'à ce que le galet retombe dans la coche du coeur 173. L'aiguille 107 a alors rattrapé l'aiguille 157 pour tourner de nouveau en synchronisme avec lui, les aiguilles étant superposées rigoureusement.As soon as the wheel 102 is released, the mobile 103 is rotated by the force exerted by the lever 171 which rotates this wheel 102 until the roller falls back into the notch of the heart 173. The needle 107 then caught up with the needle 157 to turn again in synchronism with it, the needles being rigorously superimposed.

Selon une caractéristique avantageuse de l'invention, chaque branche 109 et 111 de la pince 101 est pourvue d'une portion élargie 129a, 129 b, coopérant avec une goupille fixe 189 placée entre les branches 109 et 111 et chassée dans la platine 114. Suivant l'implantation de la goupille (qui se fait en fonction de la place disponible et qui n'a pas à être nécessaireemnt symétrique vis-à-vis des branches) les portions 129a, 129b peuvent avoir des dimensions latérales différentes. Ceci est le cas dans l'exemple de réalisation représenté aux figures 3 et 4.According to an advantageous characteristic of the invention, each branch 109 and 111 of the clamp 101 is provided with an enlarged portion 129a, 129b, cooperating with a fixed pin 189 placed between the branches 109 and 111 and driven into the plate 114. Depending on the location of the pin (which is done according to the space available and which does not have to be necessary symmetrically vis-à-vis the branches) the portions 129a, 129b may have different lateral dimensions. This is the case in the embodiment shown in Figures 3 and 4.

Cet agencement de la goupille 189 entre les portions élargies 129 a pour but de limiter à une valeur prédéterminée maximale le débattement vers l'intérieur des branches 109 et 111 de la pince.The purpose of this arrangement of the pin 189 between the enlarged portions 129 is to limit the inward movement of the legs 109 and 111 of the clamp to a predetermined maximum value.

Claims (7)

  1. Timepiece of the type having a fly-back hand, provided with a control device for stopping and starting a fly-back hand, comprising a fly-back wheel (103) integral with said fly-back hand (107), a fly-back pincer (101) made of a single piece substantially U-shaped with two branches (109, 111) an extremity of each of which being interconnected by a connecting member (113), the fly-back wheel (103) being disposed between the free extremities (133) of the two branches (109, 111) and means (135) adapted to deform said pincer (101) in a manner such that they can assume two configurations, namely a first configuration, called the closed, in which each branch (109, 111) of the pincer (101) applies a radial force to the circumference of the fly-back wheel (103) so as to block the latter and thereby to stop the fly-back hand (107), and a second configuration, called the open, in which the two branches (109, 111) of the pincer (101) are not in contact with the fly-back wheel (103), so as to release the latter and to permit movement of said fly-back hand (107), such timepiece being characterized in that it also comprises two fixed reaction members (115, 117) against which is applied a first face of said connecting portion (113) and in that said deformation means (135) comprise means (141, 143, 147) for generating a deformation force acting against said reaction members (115, 117) on a second face of said connecting portion (113) opposite to said first face, and in a zone situated between these reaction members, this connecting portion (113) being formed in a manner so as to have, in the plane of the pincer (101), a resilient deformability, when said deformation force is applied, sufficient to enable the opening of said pincer by separating its two branches respectively rotating around said two reaction members so as to release said fly-back wheel.
  2. Timepiece according to claim 1, characterized in that the branches (109, 111) of the pincer (101) have a width (11) greater than the width (12) of said connecting portion (113), the resilient deformability of this connecting portion (113) being greater than the resilient deformability of said two branches .
  3. Timepiece according to any one of the claims 1 and 2, characterized in that said reaction members (115, 117) are pins mounted in a base support (114) of said timepiece.
  4. Timepiece according to claim 3, characterized in that said deformation means (135) are so arranged as to apply a deformation force (F4) at the centre of said connecting member, symmetrically with respect to said pins (115, l17).
  5. Timepiece according to claims 3 and 4, characterized in that said connecting portion (113) is provided with arcuate portions (119, 121) that are an integral part of the pincer and passes around said pins (115, 117) at an angle of 270°.
  6. Timepiece according to the preceding claims, characterized in that said deformation means (135) comprise a control wheel (141) formed from a two tier wheel, one of the tiers forming a ratchet (141b) and a cam (142) being affixed to the other tier (141a), and said wheel is rotatably mounted with respect to said pincer (101) and associated with a step by step control for its rotation (143, 147) and said cam (142) is situated adjacent to said portion (113) of said connecting portion with the interposition of a pusher member (143c) capable of selectively provoking said resilient deformation of said connecting portion following the raised and depressed areas of the cam (142) in the course of its stepwise rotation.
  7. Timepiece according to claim 6, characterized in that said pusher member (143c) is formed of the extremity of one of the branches (143a) of a V-shaped spring of which the other branch (143b) constitutes the jump also cooperating with said cam (142).
EP91120949A 1990-12-11 1991-12-06 Timepiece of fly-back hand chronograph type provided with a device for stopping and starting the fly-back hand Expired - Lifetime EP0490285B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3909/90 1990-12-11
CH3909/90A CH679969B5 (en) 1990-12-11 1990-12-11

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EP0490285A1 EP0490285A1 (en) 1992-06-17
EP0490285B1 true EP0490285B1 (en) 1996-06-05

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EP91120949A Expired - Lifetime EP0490285B1 (en) 1990-12-11 1991-12-06 Timepiece of fly-back hand chronograph type provided with a device for stopping and starting the fly-back hand

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US (1) US5122995A (en)
EP (1) EP0490285B1 (en)
JP (1) JPH04269689A (en)
CH (1) CH679969B5 (en)
DE (1) DE69120038T2 (en)
SG (1) SG42949A1 (en)

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CH695802A5 (en) * 2001-10-23 2006-08-31 Franck Muller Watchland Sa Control device for a timepiece.
JP2004022385A (en) * 2002-06-18 2004-01-22 Toshiba Lighting & Technology Corp Manufacturing method of fluorescent lamp, fluorescent lamp, and lighting system
EP1475682B1 (en) * 2003-05-09 2011-07-13 Audemars Piguet (Renaud et Papi) SA Chronograph watch with immediate display of the fractions of a second
DE102004017345B3 (en) * 2004-04-06 2005-09-01 Lange Uhren Gmbh Stopwatch with mechanism for starting and stopping second hand and minute hand for timing events has heart-shaped cam on minute wheel for synchronization of minute indicator with minute hand
EP1970780B1 (en) 2007-03-12 2013-03-06 Audemars Piguet (Renaud et Papi) SA Horogical device for automatic adjustment of the relative angular position of two parts that are mobile in relation to one another to a phase lag value
CH706021B1 (en) * 2007-11-21 2013-07-31 Frank Mueller Watchland S A watch movement type and chronograph timepiece provided with such a movement.
CH700302A2 (en) * 2009-01-21 2010-07-30 Montblanc Simplo Gmbh Chronograph.
CH703008A1 (en) * 2010-04-23 2011-10-31 Francois-Regis Richard Mechanism chronographe, clock and movement timepiece including such mechanism.
CH703837B1 (en) * 2010-09-29 2015-01-30 Montre Hermès S A Timepiece.
EP2703912B1 (en) * 2012-09-03 2015-03-25 Richemont International S.A. Dispositif d'arrêt de balancier pour pièces d'horlogerie avec tourbillon
JP6564561B2 (en) * 2013-05-31 2019-08-21 ロレックス・ソシエテ・アノニムＲｏｌｅｘ Ｓａ Clock mechanism for storing and displaying time information
US8923096B1 (en) 2013-10-17 2014-12-30 Timex Group Usa, Inc. Method of displaying elapsed time on a wristworn device and wristworn device displaying same
WO2017098394A1 (en) * 2015-12-09 2017-06-15 Patek Philippe Sa Geneve Flyback mechanism
EP3185090B1 (en) * 2015-12-23 2019-10-23 Rolex Sa Device for counting and displaying a fraction of a time unit
EP3582029B1 (en) * 2018-06-14 2021-09-08 Patek Philippe SA Genève Fly-back hand mechanism and chronograph comprising such a mechanism
CH718037A2 (en) * 2020-11-05 2022-05-13 Timeforge Sarl Digital display mechanism for split-seconds chronograph and chronograph comprising such a mechanism.
EP4202577A1 (en) 2021-12-21 2023-06-28 Manufacture d'Horlogerie Audemars Piguet SA Lever device for a timepiece movement

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Also Published As

Publication number Publication date
CH679969GA3 (en) 1992-05-29
JPH04269689A (en) 1992-09-25
SG42949A1 (en) 1997-10-17
DE69120038T2 (en) 1997-01-16
DE69120038D1 (en) 1996-07-11
EP0490285A1 (en) 1992-06-17
US5122995A (en) 1992-06-16
CH679969B5 (en) 1992-11-30

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