WO2021171233A1

WO2021171233A1 - Timepiece

Info

Publication number: WO2021171233A1
Application number: PCT/IB2021/051600
Authority: WO
Inventors: Ludovic Ballouard; Vladimir Victor NEGAULT
Original assignee: Ludovic Ballouard
Priority date: 2020-02-27
Filing date: 2021-02-26
Publication date: 2021-09-02

Abstract

The invention relates to a timepiece (1) intended for alternately displaying the current time and a so-called chronograph complication using hands comprising a mechanism which comprises a display subassembly, a sensor rack equipped with a sensor and a drive subassembly, the display subassembly comprising a timer disc, the drive subassembly comprising two levers mounted with the ability to pivot with a limited travel, each equipped with a geartrain, one of said levers comprising a cam at the free end of its geartrain, the other of said levers comprising a chronograph wheel at the free end of its geartrain, the sensor being intended to be driven by the cam, and the free end of the sensor rack being intended to mesh with the timer disc of the display subassembly in order to display the current time, the chronograph wheel being intended to drive the timer geartrain of the display subassembly to display the chronograph function, manipulation of at least one push-button (11) bringing about alternating operation of the levers in order to display the current time or the chronograph function.

Description

WATCH PART

The present invention relates to a timepiece intended to display with the same hands the display of the hour, minutes and seconds, as well as a chronograph function.

The chronograph is a complementary mechanism added to the movement of a watch. It allows the measurement of elapsed time during a sporting event, industrial operations, laboratory experiments, or any other application that requires knowing the duration of execution.

Most of the chronograph mechanisms are integrated into the movement, the components of which are placed directly on the movement, on the bridge side.

The presence of this mechanism integrated into a pocket watch is recognizable externally on the one hand by the functions push-button located on the same axis as the crown of the winding stem and on the other hand by the display of the hands on the dial. .

In general, the wristwatch is presented with the winding crown at 3 o'clock, two chronograph pushers are placed on either side of it.

In general, the second hand can have a chronograph function, while the measurement of minutes or hours is carried out on dedicated dials and is independent of that of the current time.

Thus, a pocket watch or wristwatch which has a chronograph mechanism is recognizable by the plurality of dials present under the crystal.

Several groups of parts make up the chronograph mechanism, their function of which is well defined. These groups are the control, the clutch, the blocker or brake, the counter (s) and the return to zero.

Two types of movement with chronograph mechanism are commonly used, mechanisms with column wheel or with cam.

The cam or column wheel are used to control the levers to perform the chronograph functions.

The clutch wheel is mounted to pivot and ensures the rotation of the chronograph mobile.

In these mechanisms, the various moving parts are fixed, only references, such as the clutch wheel, are moving to apply the aforementioned moving parts. The present invention provides an original mechanism making it possible to display the hours, minutes and seconds display with the same hands, as well as a chronograph function.

The present invention relates to a timepiece intended for the alternative display of the current time and of a so-called chronograph complication using hands, comprising a mechanism which comprises a display sub-assembly, a feeler rake provided of a probe and a motor sub-assembly, the display sub-assembly comprising a timer mobile, the motor sub-assembly comprising two rockers mounted to pivot with a limited travel, each equipped with a gear train, one of said rockers comprising at the free end of its gear train a cam, the other of said rockers comprising at the free end of its gear train a chronograph wheel, the feeler being intended to be driven by the cam, and the end free of the feeler rake being intended to engage the timer mobile of the display sub-assembly for displaying the current time, the chronograph wheel being intended to drive the timer mobile of the sub-assembly of display for displaying the chronograph function, the operation of at least one push button requesting the alternative operation of the rockers for displaying the current time or the chronograph function.

According to all optional characteristics of the timepiece according to the invention: the timer mobile of the display sub-assembly comprises a needle bearing axis and is integrally embedded in a chronograph display wheel, said axis being embedded in or fitted around a pinion which is integral with a core on which is mounted a caster which is integral with a spring fixed to the chronograph display wheel, the free end of the feeler rake being intended to engage the pinion, said heart being intended to drive the chronograph display wheel by means of said caster; the timepiece comprises a first mechanism for hours and minutes, and a second mechanism for seconds; one of said levers comprises an hour cam intended to perform one revolution in twelve hours and a minutes cam intended to perform one revolution in one hour, while the other of said levers comprises an hours chronograph wheel intended to perform a turn in twelve hours and a chronograph wheel intended to perform one revolution in one hour; the motor sub-assembly of the first mechanism comprises a first lever comprising a limaçon and a first lanterned carriageway meshed by a large average pinion, and a second lever comprising the chronograph wheel and a second lanterned carriageway meshed by a chronograph drive pinion, the medium-sized pinion and the chronograph drive pinion being permanently meshed by a reference; the first lanterned carriageway engages a first timer wheel embedded in a first timer pinion, the first timer wheel meshing a first minute pinion integrally embedded in a minute string and freely embedded in an hour pinion on which a first hour wheel and an hour limaçon, the first hour wheel being meshed by the first timer pinion; the second lanterned carriageway engages a second timer wheel fitted around a second timer pinion, the second timer wheel meshing a second minute pinion freely set in a second hour pinion on which a second engaged hour wheel is attached by the second timer pinion and a first intermediate hour chronograph wheel, the second minute pinion being integral with a first intermediate minute chronograph wheel; the timer mobile of the display sub-assembly of the first mechanism comprises a minute axis carrying the minute hand, the minute axis being embedded in an hour axis carrying the hour hand, each of the axes being integral with a chronograph display wheel; the minute axis is embedded in a minute pinion and an hour pinion, each of the pinions being embedded in a heart provided with a caster attached to the corresponding chronograph display wheel; the timing wheel of the second mechanism is meshed by the medium pinion by means of a medium wheel.

Other characteristics and advantages of the invention will become apparent on reading the description, with reference to the accompanying drawings, given by way of non-limiting examples and in which:

FIG. 1 is an exterior view on the dial side, of a timepiece according to the invention.

Figures 2 to 6 are views of a first minute and hour mechanism, equipped with a display sub-assembly and a motor sub-assembly.

FIG. 2 is a top view illustrating the current time mode.

FIG. 3 is a top view illustrating the indicator sub-assembly which is not meshed by the motor sub-assembly. FIG. 4 is a top view illustrating the so-called chronograph mode.

Figure 5 is a sectional view along A-A of Figure 2, illustrating the engine sub-assembly of hours and minutes.

Figure 6 is a sectional view along B-B of Figure 2, illustrating the hours and minutes display sub-assembly.

Figures 7 to 12 are views of a second seconds mechanism, equipped with a display sub-assembly and a motor sub-assembly.

Figure 7 is a perspective view of the second seconds mechanism.

Figure 8 is a top view of the second seconds mechanism.

Figure 9 is a sectional view along C-C, illustrating the seconds display sub-assembly.

FIG. 10 is a sectional view along D-D, illustrating the seconds motor sub-assembly.

FIG. 11 is a top view illustrating the current time mode.

FIG. 12 is a top view illustrating the so-called chronograph mode.

Thus, the timepiece 1 according to the invention is intended for the alternative display of the current time and a so-called chronograph complication from the same hour, minute and second hands.

The display of the current time of timepiece 1 is said to be retrograde, a hand returning to its starting point when it has traveled its scale, namely that the set of hands describes a complete rotation before returning instantly to their initial position to start a new race.

Commonly, the caliber of the timepiece comprises a traditional finishing cog comprising a barrel, a large average mobile, an average mobile, a second mobile, as well as a regulator assortment consisting of a mobile. exhaust, a Swiss anchor and a balance.

Usually, the blank comprises a plate, a bridge on the dial side 23, an intermediate bridge 22 and a bridge on the bottom side 21.

In the remainder of the description, reference will be made to the upper side for the side towards the dial and to the lower side for the side towards the bottom. According to one characteristic, the timepiece 1 comprises a mechanism 2, 5 equipped with a display sub-assembly 3, 6 and a motor sub-assembly 4, 7.

It is understood by a display sub-assembly 3, 6, a kinematic assembly carrying the display function, namely comprising at least one hand 8, 9, 10 indicating an hourly time, namely the hour hand 8, 9 minute hand and 10 second hand.

It is understood by an engine sub-assembly 4, 7, a kinematic assembly responsible for the operation of the display sub-assembly 3, 6.

It is also understood by the current time, the standard indication of the official time by the three hands 8, 9, 10 mentioned above.

According to the illustrated embodiment, the timepiece 1 comprises two mechanisms 2, 5, presented from an external view by two dials, namely a first mechanism 2 for the display of hours and minutes, as well as a second mechanism 5 for displaying the seconds.

The first mechanism 2 comprises a dual display by two superimposed concentric 8, 9 hands, namely an 8 hour hand and a 9 minute hand, while the second mechanism 5 includes a display consisting of a 10 seconds hand.

Thus, the first mechanism 2 comprises a display sub-assembly 3 of the hours and minutes and a motor sub-assembly 4 of the hours and minutes; the second mechanism 5 comprises a seconds display sub-assembly 6 and a seconds motor sub-assembly 7.

Remember that each of the mechanisms 2, 5 is capable of reproducing with its same hands 8, 9, 10 two distinct functions, namely the current time and the aforementioned complication.

The current time and chronograph functions are controlled by operating at least one push button 11, preferably a push button 11, arranged on the middle part of timepiece 1.

The chronograph function is broken down into three sequences, namely a zero-setting sequence, a sequence for starting the chronograph function, as well as a sequence for stopping the chronograph, controlled by successive pressure on the at least one. a push button. A fourth press on at least one push button 11 returns the hands 8, 9, 10 to the current time.

The operation of the various aforementioned sequences will be described in more detail in the remainder of the description.

To this end, the engine subassemblies 4, 7 include a current time function and a chronograph function, intended for the end of their respective kinematic chain to interact alternately with the corresponding display subassembly 3, 6, for the 'display of the current time or of the chronograph function.

Note that each of the motor subassemblies 4, 7 comprises a first rocker 41, 71 for the current time function, and a second rocker 42, 72 for the chronograph function.

The first rocker 41, 71 alternately engages the display sub-assembly 3, 6 by means of at least one rake 12, 13, 14, 15, 24, 25, as explained in more detail in the continuation of the description.

The engine subassemblies 4, 7 according to the illustrated embodiment, each comprise two rockers 41, 42, 71, 72 each equipped with a gear train.

Slave to the actuation of at least one push button 11, the two rockers 41, 42, 71, 72 of each of the motor subassemblies 4, 7 can rotate at limited angles.

Each of the rockers 41, 42, 71, 72 constitutes a pivoting support for a gear train, namely a gear train for the current time and a gear train for the chronograph function.

According to an additional characteristic, the gear trains of the rockers 41, 42 of the first mechanism 2 are permanently driven by a reference 20.

More specifically, as illustrated in Figure 5, the proximal end of the first lever 41 is fitted around a large pinion 18, the proximal end of the second lever 42 is fitted around a drive pinion chronograph 19, the reference 20 permanently meshes the large pinion 18 and the chronograph motor pinion 19.

Note that the first and second rockers 41, 42 of the first mechanism 2 are mounted to pivot along a first axis of rotation A and a second axis of rotation A 'respectively, located on either side of the reference 20. According to an additional feature, the seconds mobile is meshed by the high average pinion 18, via an average wheel, not shown.

According to an additional characteristic, the timepiece comprises stops, not shown, rockers 41, 42, 71, 72 and feeler rakes 12, 13, 21, intended to limit their travel with limited deflections.

Recall that the reciprocating pivoting of the levers 41, 42, 71, 72 selectively causes the display function of the display sub-assembly 3, 6 for displaying the current time or the chronograph function.

Remember also that according to the illustrated embodiment, the timepiece comprises two mechanisms 2, 5, each comprising a display sub-assembly 3, 6 and an engine sub-assembly 4, 7.

The first mechanism 2 for hours and minutes comprises sub-assemblies 3, 4 with double levels, while the second mechanism 5 for the seconds comprises sub-assemblies 6, 7 which will be qualified as single level.

First, the structure of the first mechanism 2 will be described in detail below.

In order to position the different parts of the motor sub-assembly 4 of the first mechanism 2 with respect to each other, it will be considered, from a proximal position to a distal position with respect to the reference 20, firstly on the first lever 41: the first axis of rotation A, a first intermediate axis B and a first distal axis C; secondly on the second rocker 42: the second axis of rotation A ’, a second intermediate axis B’, a reference axis C ’and a second distal axis D.

Note that the display subsets 3, 6 include a display axis (P, P ’).

The display sub-assembly 3 of the first mechanism 2 comprises a minute axis 31, in the form of a tenon, its upper end is secured to the minute hand 9 and its lower end is mounted free in rotation on the bridge on the bottom side.

The minute axis 31 is also secured to a minute chronograph display wheel 32.

The 31 minute axis is freely set in two concentric 33, 34 pinions, namely a 33 minute pinion and 34 hour pinion, identically cut and freely rotating relative to each other.

The two pinions 33, 34 are held axially by the intermediate bridge. The pinions 33, 34 are mounted in opposition to one another with respect to the intermediate bridge.

The 31 minute axis is freely embedded in a 35 hour axis, in the form of a hollow tube, which carries the 8 hour hand at its upper end.

The 35 hour axis is integral with a 36 hour chronograph display wheel.

Also, the 35 hour axis is rotatably mounted on the bridge on the dial side.

According to an additional characteristic, on each of the pinions 33, 34 is integrally driven a chronograph heart, namely a minutes heart 331 and an hours heart 341.

On each of the hearts 331, 341 is mounted a wheel, namely a minute wheel 332 and an hour wheel 342, fixed to a fixed spring and carried by their respective corresponding wheel, namely the minute chronograph display wheel 32 and 36 hour chronograph display wheel.

Note that the minute 332 and hour 342 wheels, under the effect of their spring, tend to approach the center of rotation centered on the axis of the concentric pinions 33, 34, working continuously with their hearts 331, 341 respective.

Note that an axis integral with a needle 8, 9 and a wheel 32, 36, which is itself integral with a spring and a roller 332, 342 mounted on a heart 331, 341 integral with a pinion 33, 34, makes it possible to secure the needle carrier assembly with the mobile formed by a pinion 33, 34 and a heart 331, 341, when no external force acts on the wheel 32, 36 corresponding, as explained in more detail in the remainder of the description.

According to an additional characteristic, each of the pinions 33, 34 is meshed by a feeler rake 12, 13 and a spring rake 14, 15 provided with an offset spring 141, 151 as an elastic return means. The role of each of the rakes 12, 13, 14, 15 will be explained in more detail below.

The first mechanism 2 comprises a feeler rake for 12 hours and a feeler rake for 13 minutes, as well as a spring rake for 14 hours assembled with an offset spring for 141 hours and a rake for 15 minutes assembled with an offset spring for hours 151.

According to the illustrated embodiment, each of the feeler rakes 12, 13 is pivotally mounted at its proximal end in a coaxial manner on a first pivoting axis 16 and comprises at its distal end a toothed sector intended to engage the pinion 33, 34 arranged in correspondence. . According to the previous embodiment, a feeler rakes 12, 13 comprises a feeler 121, 131 provided with a nose at its free end, which is intended to follow the contour of the snail located at the distal end of the first lever, such as as described in more detail in the remainder of the description.

Note that a snail is an example of a cam, also called a snail cam.

According to the illustrated embodiment, each of the spring rakes 14, 15 is pivotally mounted at its proximal end in a coaxial manner on a second pivoting axis 17 and comprises at its distal end a toothed sector intended to engage the pinion 33, 34 arranged in correspondence. .

Details that a spring rake 14, 15 is returned by its offset spring 141, 151 and engages its corresponding pinion 33, 34 to take up the play during its retrograde return during the jumping of the nose of the feeler rake 14, 15 back on the minimum radius of the snail arranged in correspondence, located at the distal end of the first lever 41.

According to the embodiment illustrated in Figures 2 to 5, the first lever 41, of the motor sub-assembly 4 of the first mechanism 2, comprises from its proximal end to its free distal end, a gear train comprising a first lanterned carriageway 411 according to the first axis of rotation A, a timing wheel set along the first intermediate axis B, and a first minute pinion 415 along the first distal axis C.

According to the first intermediate axis B, the aforementioned timer mobile is composed of a first timer pinion 412 embedded in a first timer wheel 413 driving the first minute pinion 415, as explained below.

According to the first axis of rotation A, the first lanterned carriageway 411 is fitted around the large-average pinion 18, the first lanterned carriageway 411 driving the first timer wheel 413 of the aforementioned timer mobile.

According to the first distal axis C, the first pinion of minutes 415, which makes one revolution in one hour, is integrally embedded in a snail of minutes 417.

The first minutes pinion 415 is freely set in another hours pinion, not referenced, around which is integrally fitted a first hours wheel 414 and an hours limaçon 416 which performs one revolution in twelve hours.

Thus, the minute snail 417, which is integral with the first minute pinion 415, performs one revolution in one hour, while the hour snail 416, which is integral with the first hour wheel 414, performs one revolution in twelve hours. . Note that the first hour wheel 414 is driven by the first timer pinion 412.

Thus, the first lanterned roadway 411 drives the first timer wheel 413 which drives the first minute pinion 415 integrally with the minute string 417, while the first timer pinion 412 drives the first hour wheel 414 integrally with the hour chain 416 .

The pivoting of the first rocker 41 along the first axis of rotation A engages or disengages the snails 416, 417 of the feeler rakes 12, 13.

The second rocker 42 comprises from its proximal end to its distal end, a gear train comprising a second lanterned carriageway 421 along the second axis of rotation A ', a second timing pinion 422 along the second intermediate axis B', a second pinion minutes 423 along the return axis C 'and an hours and minutes chronograph drive wheel 424 along the second distal axis D.

The second rocker 42 is meshed by the chronograph motor pinion 19 which is set, along the second axis of rotation A ’, in the second lantern road 421.

It should be noted that the chronograph motor pinion 19 is cut identically to the large average pinion 18, and therefore rotates freely at the same speed and in the same direction as the large average pinion 18, causing its second lantern road 421.

The second lanterned roadway 421 engages a timer mobile, along the second intermediate axis B ’, composed of a second timer wheel 425 embedded in the second timer pinion 422.

The second timer wheel 425 meshes with the second minute pinion 423 centered along the deflection axis C '.

The second minute pinion 423 is integral with a first intermediate minute chronograph wheel 426, arranged on the back side.

Note that a second 427 hour pinion is loosely fitted around the second 423 minute pinion, oriented along the deflection axis C '.

The second hour gear 427 is integral with a second hour wheel 428 which is driven by the second timer gear 422.

Let us add that the second hour pinion 427 along the deflection axis C 'is integrally embedded in a first intermediate hour chronograph wheel 429. It should be noted that the second minute gear 423 performs one revolution in one hour, while the second hour gear 427 performs one revolution in twelve hours.

At the distal end of the second rocker 42, along the second distal axis D, is located a timing wheel composed of a third minute pinion 432 set freely in a third hour pinion 433. The third minute pinion 432 is integral with a second intermediate minute chronograph wheel 430 arranged on the back side. The third hour pinion 433 is integral with a second intermediate hour chronograph wheel 431.

It should be noted that the first intermediate chronograph wheels 426, 429 permanently mesh with the second intermediate chronograph wheels 430, 431. The intermediate chronograph wheels for minutes 426, 430 and hours 429, 431 thus rotate respectively at the same speed.

It should also be noted that the second intermediate chronograph minute wheel 430 and the second intermediate chronograph hour wheel 431 are respectively coplanar with the minutes chronograph display wheel 32 and the hours wheel 36 of display sub-assembly 3.

Thus, the pivoting of the second rocker 42 along the second axis of rotation A 'engages or disengages the second intermediate minute chronograph wheel 430 of the minutes chronograph display wheel 32 and the second intermediate hour chronograph wheel 431 of the hour chronograph display wheel 36 of display sub-assembly 3.

Secondly, the structure of the second mechanism 5 will be described in detail below.

Recall that the second mechanism 5 includes a seconds display sub-assembly 6 and a seconds motor sub-assembly 7, referred to as single-level.

The seconds display sub-assembly 6 comprises a seconds display mobile comprising a seconds display pinion 61 on which is integrally fitted a seconds heart 62 provided with a seconds heart wheel 63 which is secured to a spring integral with a seconds chronograph display wheel 64.

The seconds display pinion 61 is also loosely encased in a seconds hand barrel 65, as the seconds axis, carrying the seconds hand 10 at its upper end. The seconds chronograph display wheel 64 is fitted integrally with the seconds hand barrel 65.

The second mechanism 5 comprises a 24 seconds feeler rake equipped with a 241 seconds feeler, and a 25 seconds rake fitted with a 251 seconds offset spring.

The 24, 25 seconds rakes have the same structures as the minutes and hours, with the difference that the 24 seconds feeler rake and 25 seconds spring rake are subject to the same pivot, one below the other.

As shown in Figure 9, the toothed end of the seconds feeler rake 25 substantially engages the bottom end of the seconds display pinion 61.

The seconds motor sub-assembly 7 comprises a seconds mobile composed of a seconds pinion 71 integrally embedded in a seconds wheel 72.

The seconds motor sub-assembly 7 also includes a seconds limaçon lever 73 and a seconds chronograph lever 74.

Unlike the first mechanism 2 and as explained above, the gear trains of the flip-flops 73, 74 of the seconds motor sub-assembly are directly meshed by the seconds mobile.

According to the embodiment illustrated, in particular in FIG. 10, the snail rocker of the seconds 73 comprises a snail return of the seconds 731 which engages a snail mobile of the seconds composed of a snail pinion 732 integrally embedded in a snail of the seconds. seconds 733.

Note that the snail of seconds 731 is meshed by the pinion of seconds 71.

The pivoting of the seconds snail rocker 73 is intended to engage or disengage the beak of the seconds snail 733 from the seconds feeler 241.

According to the illustrated embodiment, the seconds chronograph lever 74 comprises a gear train from its proximal end to its free distal end, a first chronograph gear 741, a second chronograph gear 742, a chronograph drive pinion 743 integral with a seconds chronograph drive wheel 744.

Note also that the first chronograph transmission 741 is meshed by the seconds pinion 71. Note that the 744 seconds chronograph drive wheel is coplanar with the 64 seconds chronograph display wheel.

Pivoting the seconds chronograph lever 74 engages or disengages the seconds chronograph drive wheel 744 from the seconds chronograph display wheel 64.

The operation of the first mechanism will be explained below.

In the operating mode of the display of the current time, as illustrated in FIG. 2, the snails 416, 417 of the first lever 41 are in contact with the feelers 121, 131 of the feeler rakes 12, 13, while that the second rocker 42 is set back from the hours and minutes display sub-assembly 3, namely that the second chronograph wheels 430, 431 are not in contact with the minute wheel 32 and the hour wheel 36 .

It should be noted that all the mobiles of the second flip-flop 42 continue to rotate, but of course without influence on the display.

Note that under the effect of their offset springs 141, 151, the rake comes out of 14 hours and the rake comes out of 15 minutes print respectively through the 34 hours pinion and 33 minutes pinion, a rotation of the hour feeler rake 12 and the 13 minutes feeler rake, which work respectively with the 416 hours snail and 417 minutes snail.

The respective rotations are limited by the strokes of the feeler rakes 12, 13 on the snails 416, 417, thus determining the position of the needles. The current time is thus displayed.

In the display zeroing operating mode, as illustrated in FIG. 3, the first pressure on the at least one push button 11 engages the rotation of the minute hand and of the dial hands. hours on 12:00, until the next pressure by the user.

The first pressure on at least one push button 11 rotates the first lever 41 so as to separate its kinematic chain from the needle-bearing mobiles, by moving the first distal axis C away from the display axis P.

Under the effect of the offset springs 141, 151, the spring rakes 14, 15 print through the pinions 33, 34 a rotation to the feeler rakes 12, 13, which perform their maximum stroke limited by the fixed stop of the feeler rakes 12, 13 . It should be noted that all the mobiles of the flip-flops 41, 42 continue to rotate, but without influence on the display.

A second pressure on at least one push button 11 engages the so-called chronograph operating mode, by causing the second rocker 42 to pivot along the second axis of rotation A ', so as to secure its kinematic chain to the moving bodies carrying it. hands, by bringing the second distal axis D closer to the display axis P until the second intermediate chronograph wheels 430, 431 engage.

Thus, the second intermediate hour chronograph wheel 429 imparts its rotation to the 36 hour chronograph wheel, causing the 8 hour hand to rotate at a speed of 1 revolution every twelve hours; the second intermediate minute chronograph wheel 430 rotates the minute chronograph wheel 32, causing the minute hand 9 to rotate at a rate of 1 revolution per hour.

Under the effect of the offset springs 141, 151, all of the rakes 12, 13, 14, 15 remain stationary resting on the fixed stop. The hour and minute gears bearing their respective cores are at a standstill.

The chronograph wheels 36, 32 rotate along the display axis P, their on-board rollers 332, 342 dynamically follow the contour of the hearts 331, 341, remaining in permanent support on the latter under the action of the springs of recall of casters 332, 342.

The hands 8, 9 rotate, measuring the time elapsing until the next pressure of the at least one pusher by the user.

It should be noted again that the mobiles of the first flip-flop 41 continue to rotate without influence on the display.

The third pressure by the user on the at least one pusher 11 has the effect of pressing two chronograph brake levers, not shown, against the two chronograph display wheels 32, 36, before rotating the second. Tilt 42, thus separating its kinematic chain from the moving parts carrying needles 8, 9. This separation freezes the needles 8, 9 in the position they displayed when the push-button 11 was actuated.

Thus, the two rockers 41, 42 are found detached from the display sub-assembly 3, as illustrated in FIG. 3. The hands 8, 9 are blocked by the chronograph brakes on the chronograph display wheels 32, 36 and indicate the time elapsed between the second and third press on pushbutton 11, allowing the measured time interval to be read.

A fourth press on at least one push button 11 again engages the operating mode of the current time by moving the two chronograph brakes away from the chronograph display wheels 32, 36, while the first lever 41 pivots according to the first axis of rotation A and puts the snails 416, 417 in contact with the contacts of the feelers 121, 131 of the feeler rakes 12, 13, which, by turning, reorient the hour and minute pinions according to the display axis P for the 'display of the current time.

In the absence of the chronograph brakes on the chronograph display wheels 32, 36, the two mobiles carrying hands 8, 9 again index themselves on their respective hearts under the effect of the springs of the rollers 332, 342 , and will follow the rotation of the hearts integral with the hour and minute pinions, slaved to the position of the feeler rakes 12, 13.

The sequence of four presses on at least one push button 11 can be repeated indefinitely. The operating modes of the second mechanism 5 are equivalent and simultaneous to those of the first mechanism 2, the current time mode and the chronograph mode are respectively illustrated in FIGS. 11 and 12.

As goes without saying, the present invention is not limited to the sole embodiments of this timepiece, described above solely by way of illustrative examples, but on the contrary it embraces all the variants involving technical equivalents. of the means described as well as their combinations if these fall within the scope of the invention.

Claims

1. Timepiece (1) intended for the alternative display of the current time and of a so-called chronograph complication from hands (8, 9, 10), comprising a mechanism (2, 5) which comprises a display sub-assembly (3, 6), a feeler rake (12, 13, 21) provided with a probe (121, 131, 211) and a motor sub-assembly (4, 7), the sub-assembly d 'display (3, 6) comprising a timer mobile, the motor sub-assembly (4, 7) comprising two rockers (41, 42, 71, 72) mounted to pivot with a limited travel, each equipped with a gear train, one of said rockers (41, 71) comprising at the free end of its gear train a cam (416, 417, 733), the other of said rockers (42, 72) comprising at the free end of its train gear train a chronograph wheel (430, 431, 744), the feeler (121, 131, 211) being intended to be driven by the cam (416, 417, 733), and the free end of the feeler rake (12, 13, 21) being intended to engage the timer mobile of the display sub-assembly (3, 6) for displaying the current time, the chronograph wheel (430, 431, 744) being intended to drive the timer mobile of the display sub-assembly (3, 6) for the display of the chronograph function, the handling of at least one push button (11) requesting the alternative operation of the rockers (41, 42, 71, 72) for the display of the current time or of the chronograph function .

2. Timepiece (1) according to claim 1, characterized in that the timer mobile of the display sub-assembly (3, 6) comprises an axis (31, 35, 65) needle carrier (8, 9, 10) and is integral with a chronograph display wheel (32, 36, 64), said axis (31, 35, 65) being embedded in or fitted around a pinion (33, 34, 61) which is integral with a heart (331, 341, 62) on which is mounted a caster (332, 342, 63) which is integral with a spring attached to the chronograph display wheel (32, 36, 64) , the free end of the feeler rake (12, 13, 21) being intended to engage the pinion (33, 34, 61), said heart (331, 341, 62) being intended to drive the chronograph display wheel ( 32, 36, 64) via said wheel (332, 642, 63).

3. Timepiece (1) according to claim 1 or 2, characterized in that it comprises a first mechanism (2) for hours and minutes, and a second mechanism (5) for seconds.

4. Timepiece (1) according to any one of the preceding claims, characterized in that one of said latches comprises an hours cam intended to perform a turn in twelve hours and a minutes cam intended to perform a turn. in one hour, while the other of said flip-flops comprises an hour chronograph wheel intended to perform one revolution in twelve hours and a chronograph wheel intended to perform one revolution in one hour.

5. Timepiece (1) according to claim 3 or 4, characterized in that the motor sub-assembly (4) of the first mechanism (2) comprises a first lever (41) comprising a snail (416, 417) and a first lantern road (411) meshed by a large pinion (18), and a second rocker (42) comprising the chronograph wheel (430, 431) and a second lantern road (421) meshed by a chronograph drive pinion ( 19), the medium-sized pinion (18) and the chronograph motor pinion (19) being permanently meshed by a reference (20).

6. Timepiece (1) according to the preceding claim, characterized in that the first lantern road (411) engages a first timer wheel (413) embedded in a first timer pinion (412), the first timer wheel (413) meshing a first minute pinion (415) integrally embedded in a minute snail (417) and freely embedded in an hour pinion on which are integrally fitted a first hour wheel (414) and an hour snail (416) ), the first hour wheel (414) being meshed by the first timer pinion (412).

7. Timepiece (1) according to claim 5 or 6, characterized in that the second lanterned roadway (421) engages a second timer wheel (425) fitted around a second timer pinion (422), the second timer wheel (425) meshing with a second minute pinion (423) freely set in a second hour pinion (427) on which is integrally fitted a second hour wheel (428) meshing by the second timer pinion (422) and a first intermediate hour chronograph wheel (429), the second minute pinion (423) being integral with a first intermediate minute chronograph wheel (426).

8. Timepiece (1) according to any one of claims 3 to 7, characterized in that the timer mobile of the display sub-assembly (3) of the first mechanism (2) comprises a minute axis (31 ) carrying the minute hand (9), the minute axis (31) being embedded in an hour axis (35) carrying the hand hours (8), each of the axes (31, 35) being integral with a chronograph display wheel (32, 36).

9. Timepiece (1) according to the preceding claim, characterized in that the minute axis (31) is embedded in a minute pinion (33) and an hour pinion (34), each of the pinions (33 , 34) being embedded in a heart (331, 341) provided with a caster (332, 342) secured to the corresponding chronograph display wheel (32, 36).

10. Timepiece (1) according to any one of claims 3 to 9, characterized in that the mobile timing of the second mechanism (5) is meshed by the large pinion (18) via d 'an average wheel.