摘要:
The acoustic radiating membrane (1) is for assembly in a music box or a striking watch. The membrane is made with at least one area of asymmetrical shape, formed in the material of the membrane or with at least one area of asymmetrical shape having a different thickness from the general thickness of the membrane. It preferably includes two asymmetrical areas of elliptical shape (2, 3) which are partly superposed and have a different thickness from each other. The two ellipses (2, 3), preferably hollowed out of the membrane, are off-centre in relation to each other.
摘要:
The invention concerns a method of marking an article using a laser emitting radiation of wavelength λ, the article being formed of a material that is slightly absorbent at said wavelength λ, characterized in that it includes the following main steps: taking a support formed of a metal that is highly absorbent at wavelength λ and capable of converting at least in part the light energy absorbed into thermal energy, arranging the article directly against the support so as to form a sufficient thermal contact between the article and the support to transfer the thermal energy from the support to the article, the article being inserted between the laser and the support, locally illuminating said support through said article in conditions able to generate, at the surface of the support, sufficient thermal energy for the thermal energy transfer from the support to the article to produce on the surface of the article a local physical or chemical transformation resulting in a contrast at the origin of the marking.
摘要:
The gong for the striking work or alarm of a watch is configured to produce a sound within the audible frequency range when it is struck by at least one hammer. This gong is made of a material, wherein the square root of the ratio of the elasticity module of the material divided by the volumic mass of the selected material is less than 3300 m/s, so as to allow the gong to produce a rich sound, comprising a large number of partials, within the audible frequency range. The selected material may be, for example, a material having an amorphous structure, such as a metallic glass.
摘要:
The invention concerns a fastening band (1) of the belt type or a wristband or bracelet for a portable device (40) for example, including fastening and length adjustment means (5). The fastening band includes an element (6, 42) for indicating the fastening tension thereof that has a specific visual appearance identifiable to the user in order to indicate to the latter when the fastening tension of the band is sufficient for a given application. The fastening band of the present invention is particularly interesting when it is implemented in the form of a wristband for a pulsometer worn on the wrist comprising optical type measuring means. In this application, a fastening tension value sufficient to guarantee proper measurement precision is predefined, the features of the indicator element being adapted to this value in order to indicate to the wearer that he has reached said value when the wristband is being fitted to his wrist.
摘要:
A method of fabricating a reinforced silicon micromechanical part includes: micro-machining the part, or a batch of parts in a silicon wafer; forming a silicon dioxide layer over the entire surface of the part, in one or plural operations, so as to obtain a thickness of silicon dioxide that is at least five times greater than the thickness of native silicon dioxide; and removing the silicon dioxide layer by etching.
摘要:
A method of fabricating a balance spring assembly (1) in silicon including a hairspring (2) made in a wafer of given crystalline orientation, in a plane (P). The volume of the assembly (1) is broken down into sub-components, inscribed in parallelepiped prisms, in secant pairs, at the junction areas, perpendicular to each other, each made in a wafer selected for the thickness or crystalline orientation thereof. An outer curve (4) is made in an orthogonal plane to that of the hairspring (2) joining it directly to a point in space, the projection of which into the plane (P) is located external to the hairspring (2). The sub-components are assembled at the junction areas.
摘要:
The invention relates to a timepiece (1) comprising a first resonator (R1) oscillating at a first frequency (f1) and connected by a main gear train (T2) to a main energy source (B2) via a main escapement (D2). According to the invention, the timepiece comprises a second resonator (R2) oscillating at a second frequency (f2) which is lower than the first frequency and cooperating with the main escapement (D2) in order to synchronise maintenance of the first resonator (R1) to said second frequency (f2).The invention concerns the field of coupled oscillators.
摘要:
The striking work device of a timepiece (1) includes a gong (2) surrounding a movement and extending in approximately one plane (x, y), and a gong-carrier (3) secured to a watch plate (8). The gong is fixed to the gong-carrier. At least one hammer (5) strikes the gong (2) to cause the gong to vibrate. The hammer (5) strikes the gong at an inclined incidence relative to the plane.
摘要:
The striking mechanism (1) for a watch or a music box includes a gong (11) fixed to a gong-carrier (12) and an activation member (2) for activating the gong in a striking mode. The striking mechanism includes a first magnetic element (13) arranged on the gong (11) and second magnetic elements (4) arranged on the periphery of the activation member (2), which is a magnetic wheel. In a striking mode, the magnetic wheel is set in rotation at a determined velocity so that the second magnetic elements (4), in the form of moving micro-magnets, move in succession and repeatedly into proximity with and opposite the first magnetic element (13), which is a fixed micro-magnet of opposite magnetic polarity. The rotation of the magnetic wheel sets the gong vibrating via a periodic variation in the magnetic repulsion or attraction force between the moving micro-magnets and the fixed micro-magnet of the gong.
摘要:
The gong for the striking work or alarm of a watch is configured to produce a sound within the audible frequency range when it is struck by at least one hammer. This gong is made of a material, wherein the square root of the ratio between the elasticity module of the material divided by the volumic mass of the selected material is less than 3300 m/s, so as to allow the gong to produce a rich sound, comprising a large number of partials, within the audible frequency range. The selected material may be, for example, gold.