Abstract: An escape mechanism including a flexible single-piece mechanism for transmission of impulses between an impulse pin of a balance, and teeth of an escape wheel. Each tooth includes a lever with a pin that can be actuated by a lifting piece, a low level of the wheel carrying the pins on a same level as stop members of a plate, and a high level carrying the lifting pieces. The impulse pin pivots a lever opposite thereto, either to cause the pin to cooperate in abutment with the second stop member, or to move the lifting piece thereof opposite the first stop member and to cause the pin to bypass the second stop member, allowing the wheel to rotate to a next tooth.

Abstract: A timepiece movement includes a plate and a bridge carrying a barrel, which includes a barrel mainspring between a drum and a receiving surface of a steel or stainless steel core and a cover fixed to the drum. The spring is made of a multiphase, cobalt-nickel-chromium based alloy, having a Young's modulus of between 200 and 240 GPa and a shear modulus of between 80 and 100 GPa, and having a width to thickness ratio of between 3 and 23, and a maximum radius of the steel or stainless steel core relative to a pivot axis is less than nine times a maximum thickness of the spring. The movement includes a shake limiting mechanism including a shim-washer independent of the core and guided by a shoulder of the core.

Abstract: A balance includes a balance staff pivotally supported rotatably and a balance wheel arranged around the balance staff. The balance wheel has one end portion fixed to a connection arm radially connected to the balance staff and a free end portion configured to be radially deformed. The balance wheel has a first rim connected to the connection arm and a second rim in overlapping relation with the first rim and formed of a material having a linear expansion coefficient different from the first rim. The first and second rims are arranged in a circumferential direction and are bonded together by melting portions formed of melted materials of the first and second rims. The melting portions are formed on upper and lower surfaces of and in an intermediate position between the first and second rims.

Abstract: An operation stabilization mechanism has a first carriage to which a rotational drive force of a train wheel is transmitted and which is rotatably supported with respect to a main plate, and a second carriage rotatably supported with respect to the first carriage. A constant-force spring is provided between the first carriage and the second carriage and is configured to impart a rotational force to the second carriage so that the second carriage undergoes rotation with respect to the first carriage. An escapement/governor mechanism is mounted in the second carriage and is configured to be driven by a rotational torque generated through rotation of the second carriage and transmitted to the escapement/governor mechanism. A stopper lever is mounted to undergo rotational movement relative to the first carriage for suppressing fluctuations in the rotational torque transmitted to the escapement/governor mechanism.

Abstract: An escapement mechanism for a timepiece movement or timepiece including at least one balance and at least one escape wheel. A transmission of impulses between the balance and the escape wheel is achieved by a single-piece flexible mechanism including at least one feeler spindle cooperating with the escape wheel or, respectively, with the balance, and the single-piece, flexible mechanism is connected by at least one flexible blade to a fixed structure of the timepiece, or respectively to the escape wheel.

Abstract: A mechanism for advancing, by periodic jumps, a pivoting cage for an escapement mechanism, including: a retaining mechanism authorizing or preventing the pivoting of the cage, depending on its movement; and a stopping mechanism authorizing or preventing the pivoting of the retaining mechanism, depending on its angular position. A constant force device causes periodic cooperation of the retaining mechanism, which includes a flirt arranged to perform complete revolutions and is connected to an input thereof, with the stopping mechanism, which includes a star wheel and is connected to an output thereof, whose trajectories interfere with each other, to pivot the cage when the stopping mechanism allows the pivoting of the retaining mechanism and to stop the cage when the stopping mechanism locks the retaining mechanism.

Abstract: There are provided a constant force device, a movement, and a mechanical timepiece which can decrease a loss of power for controlling rotation of a stop wheel & pinion.

Abstract: Assembly (20) for holding a balance spring (21) including a balance spring stud (1), and a stud-holder (2) which includes: a housing (3) for receiving the stud (1); means (4) for securing the stud (1) including a screw (5) orthogonal to the stud (1); means (6) of securing the stud-holder (2) to an escapement mechanism (30), the stud (1) including a surface (7) for orienting a balance spring (21). The screw (5) partially passes through the stud (1) to hold the stud in an indexed position. The stud (1) includes an internal thread (8) cooperating with the screw (5) and forming the orientation surface (7), and the stud-holder (2) includes: a bore (11) for the passage of the screw (5); a bearing face (11) arranged at the entry of said bore (11), on the opposite side to the housing (3), for the abutment of a head (51) of the screw (5).

Abstract: Assembly for holding a balance spring including a stud including a surface for orienting a balance spring, and a stud-holder, which includes: a first housing for receiving the balance spring stud; means for securing the stud including a screw orthogonal to the stud; means of securing the stud-holder to an escapement mechanism. The screw partially passes through the stud to hold the stud in an indexed position. The stud includes a second housing for the contact-free passage of the screw. The stud-holder includes on either side of the first housing: an internal thread cooperating with the screw; a third bore for the passage of a head of the screw (5) cooperating in abutment with the orientation surface (7).

Abstract: Escapement device of a timepiece movement includes an escapement wheel, a first mobile having means of locking with the escapement wheel and of mechanical transmission with the escapement wheel, a second mobile and the balance roller. The second mobile has means of locking with the escapement wheel and means of mechanical transmission with the escapement wheel and the first mobile. The mobiles are driven by the escapement wheel tangentially.

Abstract: Timepiece wheel set with a unidirectional wheel including an arbor carrying a pinion and at least a first wheel that is coaxial with this pinion and pivotally mounted on this arbor, this first wheel being connected to the arbor by elastic rotational return means or at least a first spring constituting first means of uncoupling, which exert a friction force on this first wheel, and the wheel set including a second wheel pivotally mounted on this arbor, and connected to this arbor by second elastic rotational return means or at least a second spring constituting second uncoupling means, which exert a friction force on this second wheel.

Abstract: An anti-trip mechanism includes a flange with a radial travel limiting channel and a balance spring with a strip wound into a plurality of coils. The balance spring includes an inner coil fixed, at a first end, to a collet coaxial to the balance spring relative to a pivot axis, and an outer coil fixed, at a second, opposite end, to a hooking element. A coil of the balance spring includes a finger that includes a feeler spindle stud that is mounted integrally with the coil. The feeler spindle stud is moveable without any contact, during the normal extension and contraction of said balance spring, in the radial travel limiting channel of the flange. The radial travel limiting channel limits travel of the finger relative to the pivot axis when an angle of pivoting imparted to the collet is greater than a determined nominal value.

Abstract: Timepiece wheel set (1) including a first guide surface (2) cooperating with a second guide surface (3) associated with a bridge (50), for pivotally mounting the wheel set (1) relative to the bridge (50) about an axis (D). The first guide surface (2) is a single surface, located on a median plane (P) of said wheel set (1), orthogonal to this axis (D), for holding the wheel set (1) careened or in a cantilever arrangement relative to this bridge (50), and the wheel set (1) is free of any guide arbours on either side of this guide surface (2).This wheel set (1) forms a ball bearing (10) wherein the first guide surface (2) forms an internal raceway (9) for balls (11) and wherein an external ball race (12) mounted on the bridge (50) includes the second guide surface (3) forming an external raceway for the balls (11).

Abstract: A timepiece movement including a tourbillon that has a rotating carriage bearing a sprung balance and an escapement. The carriage includes a top pivot and a bottom pivot, respectively carried by a top bridge and a bottom bridge of the carriage. The carriage pivots between a bottom plate of the timepiece movement and a bridge of the movement in the timepiece movement includes a stop member, arranged for limiting the axial shake of the carriage.

Abstract: An escapement mechanism for a timepiece movement or timepiece including at least one balance and at least one escape wheel. A transmission of impulses between the balance and the escape wheel is achieved by a single-piece flexible mechanism including at least one feeler spindle cooperating with the escape wheel or, respectively, with the balance, and the single-piece, flexible mechanism is connected by at least one flexible blade to a fixed structure of the timepiece, or respectively to the escape wheel.

Abstract: Provision of an operation stabilization mechanism, a movement, and a mechanical timepiece capable of stabilizing the operation of the balance with hairspring while preventing a change in the oscillation cycle of the balance with hairspring due to the gravitational force even in the case where a constant-force device is provided. An operation stabilization mechanism includes: an outer carriage 33 to which a drive force of a train wheel is transmitted and which is rotatably supported with respect to a main plate; an inner carriage 34 rotatably supported with respect to the outer carriage 33; a constant-force spring provided between the outer carriage 33 and the inner carriage 34 and imparting a rotational force to the inner carriage 34 so that the inner carriage 34 may rotate with respect to the outer carriage 33; and an escapement mechanism 102 mounted in the inner carriage 34 and configured to be driven through rotation of the inner carriage 34.

Abstract: An assembly for an escapement of a timepiece movement (100), including an escapement bridge (10), a balance cock (30), a pallet lever (7) for controlling an escapement wheel (6) in cooperation with a balance (3). This escapement bridge (10) carries a bottom pallet lever bearing (14) for guiding a bottom pallet lever pivot (15) of this pallet lever (7), and this cock (30) carries a top pallet lever bearing (14A) for guiding a top pallet lever pivot (15A) of this pallet lever (7). An arm (41) of this pallet lever (7) carries a banking pin (39) which can move in a hole (40) comprised in this balance cock (30), to limit the pivoting of this pallet lever (7).

Abstract: A timepiece includes: a frame; a mobile body of a finishing gear train; and a tourbillon mechanism including a holder supporting a balance and at least one escapement. The tourbillon mechanism includes: an outer ring rotatably mounted onto the frame about a first axis; at least one inner ring inside the outer ring and rotatable relative to the outer ring about a second axis, the holder being pivotably mounted in the inner ring and secured to a shaft around which the inner ring is freely and rotatably mounted about a third axis; a first toothed member mounted onto the frame; a first pinion secured to the shaft of the holder to engage with the first toothed member to rotate the holder; and a unit driving the inner ring, engaging with the movable body of the finishing gear train and arranged to move the inner ring and, consequently, the outer ring.

Abstract: A method, apparatus, and a non-transitory computer readable storage medium for supporting visible light communication (VLC) exchanges bitmaps for capabilities field exchange in a media access control (MAC) layer during link establishment and association with other VLC-enabled devices. An aggregation bitmap is generated to indicate whether a visible light communication (VLC) transmitter of a first device uses at least one aggregated band that comprises multiple active frequency bands. The aggregation bitmap is transmitted in a capabilities information exchange (CIE) signal to a second device. A guard bitmap that identifies a set of guard frequency bands is also generated and transmitted in the CIE signal. Each guard frequency band indicates leakage transmission from the VLC transmitter.

Abstract: The present invention relates to a tourbillon of a movement having: a rotatably mounted rotating carriage (6) connected to a second pinion (46), a balance (12) mounted on the rotating carriage (6) relative to a balance shaft (28) and also having an escape wheel (16) mounted on the rotating carriage (6) and operatively connected to the balance (12) via a lever, characterized by: a brake element (30) arranged on the rotating carriage (6), which can be brought into engagement with the balance (12) and is movable axially to the balance shaft (28).

Abstract: Device for the micrometric endshake adjustment of a timepiece wheel set in an axial direction in relation to a structure, including a pivot bearing for this wheel set defining an axial stop member for this wheel set in this axial direction. The device includes an adjustment stage of variable thickness in this axial direction, which includes at least one elastic return means pushing a first component provided with pivot drive means operable by a tool and carrying this bearing onto a second component fixed to this structure directly, or via at least one case, and this elastic return means are supported on this structure directly or via at least one case.

Abstract: The invention relates to a timepiece including a resonator cooperating with an escapement system. According to the invention, the escapement system includes a moving escape wheel arranged coaxially to the balance and driven by the gear train of the timepiece, a first fixed wheel having a first toothing and a second fixed wheel having a second toothing, the first and second fixed wheels being arranged coaxially to the moving escape wheel and a device for securing the outer end of the balance spring including a part hinged relative to the moving escape wheel and arranged to ensure a radial movement of the outer end between the first and second toothings to maintain the resonator and to transmit the motion thereof to the timepiece gear train.

Abstract: Timepiece assembly (30) including at least two opposing wheel sets (20), coupled to each other and cooperating by contact with each other on peripheral contact surfaces (200). Each peripheral contact surface (200) of each coupled wheel set (20) in this assembly (30) is the peripheral surface of a skin (210) of plastic material.

Abstract: A timepiece includes a first oscillator oscillating at a first frequency and connected by a first gear train to an energy source to display the time. The timepiece also includes a chronograph system including a second gear train connected to the first gear train via a coupling device for selectively measuring a time. The chronograph system further includes a second oscillator, which is connected to the second gear train and oscillates at a second frequency. Moreover, the second gear train is connected to the first gear train by an elastic coupling, in order to synchronize the rate of the two oscillators using the same energy source when the coupling device is in a coupled position.

Abstract: The invention relates to a clock movement including a frame (6) having a barrel (1) that contains a mainspring, a finishing gear train (2-4), an escapement mechanism (5, 7), and a spiral balance spring (8). The frame (6) comprises first clamp bodies (25, 24) for receiving respective pivotal movement members of the escapement wheel (5) and of the anchor (7), and second homologous clamp bodies (22, 26) alternating with the first clamp bodies (25, 24), the first and second clamp bodies (25, 22) of the escapement wheel being located on a circle centered on the axis of the mean wheel (3) of the finishing gear train and defining a plane that is orthogonal to said axis.

Abstract: The invention relates to a timepiece movement including a resonator formed by the cooperation of a balance with a balance spring, said resonator being pivotally mounted between a bar and another part such as a bar or a main plate. According to the invention, the timepiece movement further includes a device preventing adhesion of said balance spring against said bar including a surface decreasing means formed on the bar for limiting the contact surface when the faces of said balance spring and of said bar touch each other.

Abstract: The invention relates to an immobilizing device for a toothed wheel suitable for the field of horology where it can be part of a direct- or indirect-impulse escapement, in particular in a wristwatch. This immobilizing device (1, 2, 3, 4, 5, 6) comprises: —a base (7); —an immobilizer (9) comprising two arms (10, 11) each provided with a pallet (14, 15) intended to come into contact with a tooth of the toothed wheel (40); —a first and a second elastic element (12, 13) each having an end connected to the immobilizer (9) and another end connected to the base (7); —a third elastic element (16) connected to the immobilizer (9), and it has the particular feature that it is in one piece or in one piece apart from at least one of the pallets (14, 15). The invention also relates to a timepiece and to a method for assembling such a timepiece.

Abstract: The sub-assembly includes, irreversibly fixed to a main plate and each irreversibly pre-adjusted by the irreversible securing of adjustment and/or assembly components, after the particular timepiece function thereof has been adjusted and function checked on the test bench, functional modules: a gear train module, a display module, and a time-setting module. Other mechanical sub-assemblies, each irreversibly fixed to the preceding lower order mechanical sub-assembly, include various modules; motor module frame-mounted self-winding device module escapement holder regulating module motion work train date module self-winding module. Mechanical movement including at least one mechanical sub-assembly of this type. Watch including a mechanical movement of this type. Method of assembling mechanical sub-assemblies of this type by the irreversible securing of mechanical sub-assemblies and irreversibly pre-adjusted modules.

Abstract: A timepiece part, includes a frame having a power source, a housing including a first pivotal movement system and a second pivotal movement system; an escapement set up on a mounting, a first kinematic linkage including a first wheel borne by a first half-shaft from the first pivotal movement system and a second wheel borne by a first half-shaft from the second pivotal movement system, and a second kinematic linkage including a first wheel borne by the second half-shaft from the first pivotal movement system and a second wheel borne by the first or second half-shaft of the second pivotal movement system. One of the wheels borne by the second pivotal movement system is kinematically linked to the power source, and the other wheel borne by the pivotal movement system is stationary relative to the frame. Both wheels borne by the first system are kinematically linked to a differential.

Abstract: The invention relates to a timepiece including a resonator cooperating with an escapement system. According to the invention, the escapement system includes a moving escape wheel arranged coaxially to the balance and driven by the gear train of the timepiece, a first fixed wheel having a first toothing and a second fixed wheel having a second toothing, the first and second fixed wheels being arranged coaxially to the moving escape wheel and a device for securing the outer end of the balance spring including a part hinged relative to the moving escape wheel and arranged to ensure a radial movement of the outer end between the first and second toothings to maintain the resonator and to transmit the motion thereof to the timepiece gear train.

Abstract: A spiral spring (10) for the movement of a watch, includes a plurality of coplanar leaves (10a, 10b) wound into one another. Furthermore, the inner ends of each leaf are rigidly connected to a single collet (12). The leaves (10a, 10b) and the collar (12) are produced as a single part.

Abstract: The invention relates to a system of assembling a member, made of a first material, in the aperture of a part made of a second material having no usable plastic domain, using an intermediate portion (7, 27, 47, 67, 87) made of a third material, mounted between said member and said part. According to the invention, the part is accommodated against a first level (6) of the intermediate portion and is resiliently locked on a second level of the intermediate portion by the member in order to secure together the unit comprising the member—intermediate portion—part. The invention concerns the field of timepieces.

Abstract: A spiral spring (10) for the movement of a watch, includes a plurality of coplanar leaves (10a, 10b) wound into one another. Furthermore, the inner ends of each leaf are rigidly connected to a single collet (12). The leaves (10a, 10b) and the collar (12) are produced as a single part.

Abstract: Timepiece mechanism cassette including at least one bearing surface for positioning the cassette in a movement, a plate and a bar, at least one of which is rigid, between or on which there are arranged functional components at least two of which are movable relative to each other. The plate and bar form an inseparable single piece component with such a functional member, with at least one elastically deformable connecting element, and are movable between a proximate position where they are separated by a minimum distance (EMIN) and a distal position where they are separated by a maximum distance (EMAX). They include snap fit means and complementary snap fit means for holding them in the proximate position.

Abstract: Timepiece escape mechanism sub-assembly including at least one bar and at least one balance spring, the outer end of which is secured to a balance spring stud. At least one said balance spring and said balance spring stud associated therewith form a single-piece assembly with said bar.

Abstract: Timepiece mechanism structure (1) for receiving and guiding at least one pivoting wheel set (10). The structure includes at least one inseparable single-piece structure (11), including at least one inseparable single-piece frame (17) which includes pivot housings (12) aligned in pairs in a direction of alignment (A) for receiving the pivots of an arbour (47) of at least one said pivoting wheel set (10), and in that each such pivot housing (12) is an open housing formed by a semi-bearing or by a dihedral, and includes at one end a stop bearing surface (120) in this direction of alignment (A).

Abstract: A spiral spring (10) for the movement of a watch, includes a plurality of coplanar leaves (10a, 10b) wound into one another. Furthermore, the inner ends of each leaf are rigidly connected to a single collet (12). The leaves (10a, 10b) and the collar (12) are produced as a single part.

Abstract: A spiral spring (10) for the movement of a watch, includes a plurality of coplanar leaves (10a, 10b) wound into one another. Furthermore, the inner ends of each leaf are rigidly connected to a single collet (12). The leaves (10a, 10b) and the collar (12) are produced as a single part.

Abstract: A temperature compensation-type balance includes a balance staff, and a balance wheel that has a plurality of bimetal portions which are disposed in parallel to each other in a circumferential direction around a rotational axle O of the balance staff and connection members which connect the plurality of bimetal portions and the balance staff. The bimetal portion is a layered body in which a first member and a second member are radially overlapped, and one end portion in the circumferential direction is a fixed end connected to the connection member and the other end portion in the circumferential direction is a free end. The first member is formed of a ceramic material, and the second member is formed of a metal material having a thermal expansion coefficient different from that of the first member.

Abstract: A detent escapement for a timepiece includes an escape wheel, a balance having an unlocking jewel, and a blade. A rotation reference line is formed by a straight line passing through a rotation center of the blade in a state where the balance is at an oscillation center. In order to balance (1) a sum total of the effects on rotational movement of the balance caused by “impulse before dead point” and by “resistance after dead point”, which together comprise the total effect causing the timepiece to advance, and (2) a sum total of the effects on rotational movement of the balance caused by “resistance before dead point” and by “impact after dead point”, which together comprise the total effect causing the timepiece to slow, the unlocking jewel is aligned with the rotation reference line and positioned at a position facing towards a direction farthest from the escape wheel.

Abstract: Shockproof timepiece wheel for driving a component having non-zero unbalance relative to a pivot axis of this wheel, this wheel includes, on the one hand, an arbour for pivotally guiding the wheel about this pivot axis, and on the other hand, a drive means arranged or assembled on a flange of this wheel, this wheel including at least one flexible element between this arbour and this flange. This flange includes a cylindrical shoulder cooperating in abutment for centring purposes with a complementary cylindrical shoulder comprised in this arbour to ensure the perfect concentricity of this drive means (7) with this arbour.

Abstract: A detent escapement for a mechanical timepiece includes an escape wheel, a balance mounted for undergoing oscillation movement about a balance staff, a blade and an actuating spring. The balance has an unlocking stone and has an impulse jewel for contacting a wheel tooth of the escape wheel. The blade has a locking stone for contacting the wheel tooth of the escape wheel and is supported for undergoing movement in approaching and separating directions relative to the escape wheel. The actuating spring is configured to contact the unlocking stone and is mounted for undergoing elastic deformation along the approaching and separating directions with respect to the blade. An adjustment mechanism adjusts a projecting amount of a spring tip portion of the actuating spring from a blade tip portion of the blade.

Abstract: A detent escapement for a timepiece has an escape wheel and an actuating lever. A balance is mounted to undergo pivotal movement about a pivot axis and is configured to contact a wheel tooth of the escape wheel and an unlocking stone. The actuating lever has a locking stone configured to contact the wheel tooth of the escape wheel, a locking stone support arm that supports the locking stone, an actuating spring having a contact portion capable of contacting the unlocking stone, and an actuating spring support arm for determining a position of the contact portion of the actuating spring. At least two of the locking stone support arm, the actuating spring, and the actuating spring support arm are formed of the same material and have the same thickness in a direction along the pivot axis of the balance.

Abstract: A timepiece movement includes a balance-and-hairspring regulator and an escapement co-operating with the regulator, the outer turn (5) of the hairspring including a stiffened portion (6?; 6?; 6??) arranged to make the development of the hairspring more concentric, is characterised in that the stiffened portion (6?; 6?; 6??) is also arranged to at least partially compensate for the variation in the rate of the movement in dependence upon the oscillation amplitude of the balance caused by the escapement.

Abstract: There is provided a balance which includes a balance staff which is pivotally supported rotatably; and a balance wheel which is arranged around the balance staff and in which one end portion is a fixed end portion fixed to a connection arm which is radially connected to the balance staff and the other end portion is a free end portion which can be radially deformed. The balance wheel has a first rim which is connected to the connection arm and a second rim which is arranged to be overlapped with the first rim and formed of a material having a linear expansion coefficient different from the first rim, and the first rim and the second rim are bonded together by using a melting portion in which respective materials thereof are melted.

Abstract: 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.

Abstract: The invention relates to a system of assembling a member, made of a first material, in the aperture of a part made of a second material having no usable plastic domain, using an intermediate portion (7, 27, 47, 67, 87) made of a third material, mounted between said member and said part. According to the invention, the part is accommodated against a first level (6) of the intermediate portion and is resiliently locked on a second level of the intermediate portion by the member in order to secure together the unit comprising the member-intermediate portion-part. The invention concerns the field of timepieces.

Abstract: Anti-trip mechanism for limiting the travel of a timepiece balance including a pin projecting from a staff, including a flexible multistable or bistable element carrying an anti-trip stop member and which is fixed, via flexible and elastic connecting members, to a rigid structural element of a timepiece movement. One end of said anti-trip stop member is arranged, according to the angular position of the balance, to interfere with the trajectory of the pin, and to perform the function of a stop if the balance exceeds its normal angular travel. Each anti-trip stop member includes two arms whose respective ends each interfere with the trajectory of the pin.

Abstract: A timepiece includes: a frame; a mobile body of a finishing gear train; and a tourbillon mechanism including a holder supporting a balance and at least one escapement. The tourbillon mechanism includes: an outer ring rotatably mounted onto the frame about a first axis; at least one inner ring inside the outer ring and rotatable relative to the outer ring about a second axis, the holder being pivotably mounted in the inner ring and secured to a shaft around which the inner ring is freely and rotatably mounted about a third axis; a first toothed member mounted onto the frame; a first pinion secured to the shaft of the holder to engage with the first toothed member to rotate the holder; and a unit driving the inner ring, engaging with the movable body of the finishing gear train and arranged to move the inner ring and, consequently, the outer ring.

Abstract: The mechanism preventing rate variations caused by the effect of gravity on a regulating member of a timepiece movement includes a regulating member having a balance-spring and an escapement wheel which are mounted on a platform. This platform includes an unbalance and is mounted so as to freely rotate about at least one first axis with respect to a plate of the movement so that the platform rotates under the effect of the Earth's gravity. The mechanism includes a going train including a kinematic drive chain arranged to connect the escapement wheel to a barrel system of the timepiece and a kinematic correcting chain which compensates for the displacements and speed of the platform with respect to the plate. This mechanism further includes a regulator device including a regulator member connected to the platform and driven by the relative movements between the platform and the plate of the timepiece movement.