WO2025008699A1 - Dispositif acoustique pour pièce à sonnerie - Google Patents
Dispositif acoustique pour pièce à sonnerie Download PDFInfo
- Publication number
- WO2025008699A1 WO2025008699A1 PCT/IB2024/055926 IB2024055926W WO2025008699A1 WO 2025008699 A1 WO2025008699 A1 WO 2025008699A1 IB 2024055926 W IB2024055926 W IB 2024055926W WO 2025008699 A1 WO2025008699 A1 WO 2025008699A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piezoelectric element
- membrane
- acoustic
- acoustic device
- resonance frequencies
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/04—Indicating the time of the day
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/04—Indicating the time of the day
- G04C21/12—Indicating the time of the day by electro-acoustic means
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
- G04C21/20—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
- G04C21/28—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to put into action electro-acoustic means, e.g. awakening by music
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
- G04C21/30—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times with provision for a number of operations at different times, e.g. ringing the bells in a school
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C21/00—Producing acoustic time signals by electrical means
- G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
- G04C21/36—Signal repeating devices
Definitions
- the present invention relates to an acoustic device for a striking part, comprising a membrane whose resonance frequencies are adjustable by piezoelectric effect.
- the invention also relates to a striking part, in particular a timepiece, comprising such an acoustic device.
- Striking parts and in particular striking timepieces are well known.
- CH714635 and EP2942675 for example disclose a striking timepiece comprising a watch case housing an acoustic membrane and a watch movement provided with a striking mechanism.
- This mechanism comprises at least one gong and a hammer for striking the gong.
- the sound produced by the impact of the hammer on the gong causes the gong and the membrane to vibrate, which contributes to the sound transmission between the inside and the outside of the watch case.
- FR2466903 discloses a mechanical watch equipped with an assembly consisting of a
- An object of the present invention is therefore to provide an acoustic device for a ringing piece so that the latter can emit a sound of better quality.
- Another object of the present invention is to provide an acoustic device for a ringing piece which allows the latter to attenuate the sound amplitude to obtain a mute mode.
- At least one face of the acoustic membrane is covered by at least one piezoelectric element to occupy at least 70% of its surface, preferably at least 80%, or even at least 90% of its surface.
- the acoustic device comprises at least one piezoelectric element configured to be powered by an electrical source integrated into the electrical circuit in order to operate in an active mode.
- the acoustic device comprises several timbres.
- An electrical circuit is assigned to each timbre and has specific characteristics making it possible to adjust the resonance frequencies of the membrane as a function of the resonance frequencies of the timbre to which the electrical circuit is assigned.
- the acoustic device comprises several timbres.
- a piezoelectric element is assigned to each timbre and has specific characteristics making it possible to adjust the resonance frequencies of the membrane as a function of the resonance frequencies of the timbre to which the piezoelectric element is assigned.
- At least one electrical circuit comprises a switch making it possible to open or close the electrical circuit in order to respectively activate or disconnect said at least one piezoelectric element integrated therein.
- the assembly comprising the piezoelectric element and the electrical circuit is configured to further distance the resonance frequencies of the membrane and the timbre.
- Another aspect of the invention relates to a striking timepiece comprising the acoustic device and a hammer arranged to strike the gong of the acoustic device.
- AUDEMA-29-PCT Another aspect of the invention relates to a striking timepiece comprising the acoustic device provided with several gongs, and several hammers arranged to strike the respective gongs.
- the switch is actuated by a movement of a hammer or by a striking trigger member.
- said at least one piezoelectric element is arranged on a face of the membrane located opposite a stamp.
- FIG. 1 illustrates, associated with stamps, a perspective view of an acoustic device intended to be mounted in a striking timepiece, according to one embodiment
- FIG. 2 illustrates an equivalent circuit of a piezoelectric element and a control circuit comprising a switch
- FIG. 3 schematically illustrates a watch case of a timepiece comprising the acoustic device according to the embodiment illustrated by figure 1 or according to any one of the embodiments described below;
- FIG. 4a and 4b illustrate two circuits integrating a piezoelectric element according to two embodiments
- AUDEMA-29-PCT - Figure 5 illustrates a plan view of Figure 1 with an electrical diagram comprising an energy source according to an embodiment incorporating a variant
- FIG. 6 illustrates a plan view of the acoustic device for a timepiece, according to another embodiment incorporating a variant
- FIG. 7 illustrates a sectional view of the acoustic device of Figure 6;
- FIG. 8 illustrates, accompanied by stamps, a plan view of the acoustic device for a timepiece, according to another embodiment
- Figure 9 is a sectional view of Figure 8.
- FIG. 10 illustrates a schematic view of the acoustic device for a timepiece, according to another embodiment.
- FIG. 11 is a graph representing the resonance frequency of a gong of a timepiece and that of the acoustic membrane when the sound amplitude generated by the gong-membrane-electrical circuit assembly is in an attenuated, non-optimum and optimum mode.
- the acoustic device 10 is intended to be mounted in a striking part.
- striking part is meant any striking or musical part, such as a striking timepiece, music box, automaton or other mechanical or semi-mechanical part configured to generate a striking sound.
- AUDEMA-29-PCT and/or music.
- the embodiments exemplified in the present description refer in a non-limiting manner to a striking timepiece
- This timepiece may in particular be a grand striking or minute repeater comprising one or more gongs 12, 14.
- the device 10 in particular fulfils the function of a partition which divides an internal chamber 6 of the timepiece to form a sealed housing 16 and an acoustic cavity 8.
- the housing 16 contains a watch movement equipped with a striking mechanism.
- the acoustic cavity 8 comprises through-holes 9 for diffusing the sound produced by the striking mechanism from the inside to the outside of the watch case 100.
- the acoustic device 10 has in this example a bowl shape with a rim forming a fixing flange 11.
- a central portion of the partition constitutes an acoustic membrane 20 on which are for example arranged a first and a second piezoelectric element 30a, 30b as illustrated in FIG. 1.
- the acoustic membrane 20 can for example be made of titanium, a material which has the advantage of having a relatively low modulus of elasticity and which is ideal for transmitting acoustic waves.
- a sapphire membrane can be used according to a variant for aesthetic reasons so that the user of the timepiece can contemplate, at least in part, the watch movement on the back side of the watch case, in particular during operation of the striking mechanism.
- the acoustic device 10 may further comprise a shoe 15 secured to the fixing flange 11 and on which are fixed a first and a second gong 12, 14 intended to be struck respectively by a first and a second hammer of the striking mechanism (not illustrated) of the timepiece.
- a timepiece secured to the fixing flange 11 and on which are fixed a first and a second gong 12, 14 intended to be struck respectively by a first and a second hammer of the striking mechanism (not illustrated) of the timepiece.
- AUDEMA-29-PCT could typically produce two sounds of different tones, for example a low tone and a high tone.
- the acoustic device 10 can thus be adapted in particular for a minute repeater timepiece in order to indicate, on demand, the hours by a low tone, the quarters by a high-low sequence and the minutes by a high tone.
- the sabot 15 or the assembly consisting of gongs 12, 14 and the sabot 15 is not necessarily part of the acoustic device 10.
- the latter comprises only an acoustic membrane, at least one piezoelectric element arranged to cooperate with the membrane, at least one electrical circuit integrating the piezoelectric element and a frame for fixing the acoustic device in the watch case near a striking mechanism of the timepiece provided with at least one gong.
- the frame is adapted to support the various aforementioned elements of the acoustic device.
- the timepiece comprising the acoustic device 10 may comprise only one gong.
- a timepiece comprising the acoustic device 10 may comprise more than two gongs, for example three, four, or even five gongs.
- This type of timepiece, called a carillon timepiece may for example consist of three, four or five measures of three, four and five notes respectively played on different frequencies. This device thus requires a greater number of gongs and hammers, i.e. three, four or even five in the most melodic models.
- the acoustic device 10 further comprises a first and a second electrical circuit respectively integrating the first and second piezoelectric elements 30a, 30b.
- the device 10 is therefore suitable for a timepiece with two gongs 12, 14.
- AUDEMA-29-PCT [0031] In order to be able to maximize the amplitude of the mechanical stress applied to the acoustic membrane 20 by the two piezoelectric elements 30a, 30b, at least one face of the acoustic membrane is covered by these two piezoelectric elements to occupy at least 70% of its surface, preferably at least 80%, or even at least 90% of its surface. According to a non-illustrated variant embodiment, a single piezoelectric element is arranged on one face of the acoustic membrane and covers it according to the aforementioned proportions.
- the or each piezoelectric element 30a, 30b preferably has a shape at least partially complementary to that of the acoustic membrane.
- the acoustic membrane 20 may have a circular shape while the or each piezoelectric element 30a, 30b is of circular or partially circular shape.
- the two piezoelectric elements 30a, 30b may each have a semi-circular shape comprising a rectilinear side facing each other as illustrated in FIG. 1.
- the characteristics of the first electrical circuit 40a preferably relating at least to its impedance z, have been chosen as a function of at least one resonance frequency of the first timbre 12.
- the choice of the impedance of the first circuit thus makes it possible to adjust the resonance frequencies of the membrane 20, by exciting the first piezoelectric element 30a, as a function of the resonance frequencies of the first timbre 12.
- the characteristics of the second electrical circuit 40b preferably relating at least to its impedance, have been chosen as a function of at least one resonance frequency of the second timbre 14.
- the choice of the impedance of the second circuit which is different from that of the first circuit, thus makes it possible to adjust the resonance frequencies of the membrane 20, by exciting the second piezoelectric element 30b, as a function of the resonance frequencies of the second timbre 14.
- the first and second electrical circuits 40a, 40b each comprise a switch 70a, 70b mechanically linked so that when one opens, the other closes in order to form a switch.
- the first and second circuits 40a, 40b can thus excite, stimulate or activate, in turn, the first and second piezoelectric elements 30a, 30b in order to adjust the resonance frequencies of the acoustic membrane 20 according to those of the gong about to be struck by the corresponding hammer of the striking mechanism of the timepiece integrating the acoustic device 10.
- the excitation or activation of the first piezoelectric element 30a will modify the stiffness of the acoustic membrane 20 and thus modulate its resonance frequencies as a function of the resonance frequencies of the first timbre 12 while the second piezoelectric element is inactive.
- the excitation or activation of the second piezoelectric element 30b will modify the stiffness of the acoustic membrane 20 and thus modulate its resonance frequencies as a function of those of the second timbre 12 while the first piezoelectric element 30a is inactive.
- each circuit 40a, 40b can be switched for example directly or indirectly by the movements respectively of the first and second hammers of the timepiece in order to modify the stiffness of the acoustic membrane according to the gong which is about to be struck by the associated hammer.
- a gain in clarity can also be obtained by modulating at least one of the resonance frequencies of the acoustic membrane on the fundamental frequencies of the two gongs.
- the sound amplitude of the timbre-membrane system is optimum when the resonance frequencies of the membrane match those of the timbre. Although it is difficult to modify the stiffness of the acoustic membrane so that its resonance frequencies correspond exactly to those of the timbre, approaching it still makes it possible to achieve a significant gain in sound intensity.
- the properties of the first and second electrical circuits 40a, 40b are identical while the properties of the first and second piezoelectric elements 30a, 30b respectively differ so that their excitation by the first circuit 40a, respectively the second circuit 40b, makes it possible to adjust the resonance frequencies of the acoustic membrane 20 as a function of the resonance frequencies of the first and second timbres 12, 14 respectively.
- the properties of each piezoelectric element 30a, 30b can be chosen from one or a combination of properties including in particular the capacitance of the piezoelectric element, its contact surface with the acoustic membrane, its thickness and its mass.
- both the properties of the first and second electrical circuits 40a, 40b and the properties of the first and second piezoelectric elements 30a, 30b are chosen so that the excitation of the piezoelectric element, by its own electrical circuit, can modulate the resonance frequencies of the acoustic membrane so that these frequencies come as close as possible to the resonance frequencies of the timbre with which the piezoelectric element is associated.
- the acoustic device may comprise three, four or five electrical circuits associated either with a common piezoelectric element or respectively with one piezoelectric element among three, four or five distinct piezoelectric elements.
- the properties of the circuit, in particular its impedance z, and/or the priorities of the piezoelectric element are determined as a function of at least one resonance frequency of the gong.
- the properties of three, four or five electrical circuits and/or the priorities of a common piezoelectric element or of each piezoelectric element associated with each gong are chosen in a similar manner as a function of the resonance frequencies of the third, fourth and fifth gongs respectively.
- Figures 4a and 4b illustrate two different electrical circuits each integrating a piezoelectric element.
- varying the value of the capacitance of the circuit of Figure 4a makes it possible to modify the stiffness of the membrane.
- the circuit of Figure 4b is adapted to dampen the vibrations of the acoustic membrane 20 by dissipating, through the resistance of the circuit, the electrical energy created in the circuit.
- This makes it possible to configure the acoustic device 10 in a mute mode.
- the user can activate, using a switch, implemented by means of a pushbutton for example, the element or each piezoelectric element in order to suppress, or at least attenuate, the sound emitted by the device.
- AUDEMA-29-PCT acoustic According to this mode of operation, the stiffness of the acoustic membrane is modified in order to distance its resonance frequencies as much as possible from those of the timbre as schematically illustrated in figure 11.
- the circuit of the acoustic device 10 may also comprise a switch in the case where the user wishes to deactivate the piezoelectric effect on the membrane in order to obtain a sound of lower intensity.
- the sound transmission mode corresponds to that of conventional striking timepieces.
- the circuit of the acoustic device may comprise an energy source 60 making it possible to operate the or each piezoelectric element in an active mode in order to exert a greater stress on the membrane.
- the energy source 60 mounted in the watch case of the timepiece may typically be in the form of a battery, a micro generator, a capacitor or any combination of such elements.
- the micro generator may be mounted to transform in part the mechanical energy resulting from the user's action on a trigger intended to re-wind the spring of a barrel of the striking mechanism.
- the acoustic device 10 comprises the acoustic membrane 20, a piezoelectric element 30 having an at least partially annular shape and arranged along at least part of the periphery of the membrane 20 and a frame secured to the membrane and provided with or consisting of a fixing flange 11 for assembling the acoustic device in the watch case.
- the piezoelectric element 30 is in the form of a ring mounted against the circular edge of the acoustic membrane 20 in the plane thereof.
- the vibration of the membrane 20 electrically polarizes the piezoelectric ring 30 which exerts, by its deformation, a radial stress on the membrane.
- the piezoelectric ring is powered by an energy source 60 so as to be able to operate in active mode.
- the acoustic device 10 comprises the acoustic membrane 20 and a piezoelectric element 30c also having an at least partially annular shape and arranged along at least a portion of the periphery of the membrane 20.
- the piezoelectric element has the shape of a ring arranged in an identical or similar manner to the aforementioned embodiment.
- the piezoelectric ring 30c may be intended to operate in a passive or active mode.
- the acoustic device 10 further comprises at least one or more piezoelectric elements 30a, 30b arranged, like the embodiment illustrated in particular in FIG. 1, on one face of the acoustic membrane 20 to cover at least 70% of its surface, preferably at least 80%, or even at least 90% of its surface.
- the or each piezoelectric element 30a, 30b is electrically connected to the piezoelectric ring 30c.
- the acoustic membrane 20 vibrates under the action of the vibrations produced when the hammers strike the gongs, which allows the or each piezoelectric element 30a, 30b to produce
- the active mode allows greater stresses to be applied to the acoustic membrane 20 from its periphery. It is thus possible to vary the stiffness of the acoustic membrane 20 over a wider range.
- the amplitude of the lowering of the resonant frequency of the acoustic membrane 20 can therefore be greater compared to an embodiment operating in passive mode.
- the or each piezoelectric element 30a, 30b may be in the form of thin layers, for example with a thickness of the order of a few tens or hundreds of micrometers, typically of the order of 0.2 mm, or even more. These layers are fixed on at least one face of the acoustic membrane 20, preferably on the face on the timbre side.
- the piezoelectric layers 30a, 30b may be fixed for example by gluing.
- the piezoelectric layers 30a, 30b may be deposited with a CVD or PVD process.
- the piezoelectric layers 30a, 30b may be made of different materials, in particular quartz, ferroelectric oxides or group III-V semiconductors.
- the or each piezoelectric element 30a, 30b may typically comprise two electrodes of opposite polarities. These electrodes may be in the form, for example, of plates arranged on two opposite faces of the piezoelectric element when the latter is in the form of a thin layer.
- the acoustic device 10 comprises an acoustic membrane 20 and a peripheral element 50 connected to the acoustic membrane 20 by its periphery.
- the peripheral element may for example be in the form of a ring 50 surrounding the acoustic membrane 20 and connected thereto by fixing means 34.
- the acoustic device 10 comprises in
- AUDEMA-29-PCT in addition to a piezoelectric element 32 integrated in the ring so that any expansion of the piezoelectric element 32 exerts an increase in the tension of the acoustic membrane 20, causing an increase in its resonance frequencies. Conversely, a retraction of the piezoelectric element will compress the membrane and cause a reduction in its resonance frequencies. Generally speaking, it can be mentioned that any expansion or retraction of the piezoelectric element exerts a variation in tension on the acoustic membrane, making it possible to modulate its resonance frequencies.
- the piezoelectric element 32 may be intended to operate in a passive or active mode. It may for example be powered by an energy source 60, such as that already mentioned above, or at least one other piezoelectric element of the acoustic device 10.
- the outline of the membrane is circular, it may have other shapes.
- the shape and arrangement of at least one piezoelectric element on the membrane will be adapted accordingly in order to maximize the surface area of contact between the piezoelectric element and the membrane.
- the partition, fulfilling the function of a frame intended to be fixed in a watch case may take different forms.
- the or each gong may be integral with a striking mechanism present in the watch case of the timepiece and not with the acoustic device as illustrated by the figures.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Electromechanical Clocks (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24736538.0A EP4740071A1 (fr) | 2023-07-06 | 2024-06-18 | Dispositif acoustique pour pièce à sonnerie |
| CN202480045610.5A CN121444023A (zh) | 2023-07-06 | 2024-06-18 | 用于鸣响构件的声学装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23183868.1A EP4488771A1 (fr) | 2023-07-06 | 2023-07-06 | Dispositif acoustique pour pièce à sonnerie |
| EP23183868.1 | 2023-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025008699A1 true WO2025008699A1 (fr) | 2025-01-09 |
Family
ID=87158076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2024/055926 Ceased WO2025008699A1 (fr) | 2023-07-06 | 2024-06-18 | Dispositif acoustique pour pièce à sonnerie |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP4488771A1 (fr) |
| CN (1) | CN121444023A (fr) |
| WO (1) | WO2025008699A1 (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH464272A4 (fr) * | 1971-03-30 | 1976-03-31 | ||
| FR2466903A1 (fr) | 1979-09-28 | 1981-04-10 | Timex Corp | Transducteur piezoelectrique reglable pour montre |
| EP2942675A1 (fr) | 2014-05-07 | 2015-11-11 | Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie | Montre à sonnerie |
| EP3525045A1 (fr) * | 2018-02-09 | 2019-08-14 | Manufacture et fabrique de montres et chronomètres, Ulysse Nardin Le Locle S.A. | Piece d horlogerie a sonnerie |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH464272A (de) * | 1965-10-25 | 1968-10-31 | Sika Bau Ag | Verfahren und Vorrichtung zum Befestigen von Folien auf fester Unterlage, sowie Anwendung des Verfahrens |
-
2023
- 2023-07-06 EP EP23183868.1A patent/EP4488771A1/fr not_active Withdrawn
-
2024
- 2024-06-18 EP EP24736538.0A patent/EP4740071A1/fr active Pending
- 2024-06-18 WO PCT/IB2024/055926 patent/WO2025008699A1/fr not_active Ceased
- 2024-06-18 CN CN202480045610.5A patent/CN121444023A/zh active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH464272A4 (fr) * | 1971-03-30 | 1976-03-31 | ||
| FR2466903A1 (fr) | 1979-09-28 | 1981-04-10 | Timex Corp | Transducteur piezoelectrique reglable pour montre |
| EP2942675A1 (fr) | 2014-05-07 | 2015-11-11 | Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie | Montre à sonnerie |
| EP3525045A1 (fr) * | 2018-02-09 | 2019-08-14 | Manufacture et fabrique de montres et chronomètres, Ulysse Nardin Le Locle S.A. | Piece d horlogerie a sonnerie |
| CH714635A1 (fr) | 2018-02-09 | 2019-08-15 | Mft Et Fabrique De Montres Et Chronometres Ulysse Nardin Le Locle S A | Pièce d'horlogerie à sonnerie. |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4740071A1 (fr) | 2026-05-13 |
| CN121444023A (zh) | 2026-01-30 |
| EP4488771A1 (fr) | 2025-01-08 |
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