Patents by Inventor Davide Sarchi

Davide Sarchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10520891
    Abstract: A timepiece movement with a movable element capable of being momentarily immobilized in any one of N discrete positions, and with a device including a lever and a first magnet integral with the lever, with N second magnets integral with the movable element and arranged along an axis of displacement, and with a magnetically permeable element arranged facing one polar end of the first magnet located on the side of the movable element. The polarity of the first magnet is reversed with respect to that of the second magnets. A first magnetic torque exerted on the lever has a first direction over a first section and a second direction, opposite to the first direction, over a second section of the distance between two successive stable positions, the first direction defining a return torque towards the movable element for a contact portion of the lever.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: December 31, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Davide Sarchi, Deirdre Lenoir, Benoit Legeret
  • Patent number: 10488823
    Abstract: A timepiece movement includes a date ring having display positions, and a device for positioning the ring in a display position. The positioning device includes a lever and a first fixed magnet, a second magnet integral with the lever and a magnetic structure integral with the ring and moving between the two magnets, this magnetic structure being formed of a magnetically permeable material and having a radial dimension that varies periodically to define periods corresponding to the distances between the display positions. The magnetic axes of the two magnets are substantially aligned and their respective polarities are opposite. The magnetic torque applied to the lever can vary, so that it is pressed against the ring in the display positions but tends to move away from the ring on one part of the angular movement between these display positions.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: November 26, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Davide Sarchi, Deirdre Lenoir, Benoit Legeret
  • Patent number: 10474109
    Abstract: Timepiece movement including a mechanism, a spring barrel for driving the mechanism, and an equalization device connected to the spring barrel. The spring barrel includes a drum and a motor spring to exert a driving torque which is variable as a function of the degree of winding-up of the motor spring. The equalization device is driven by the spring barrel and exerts an auxiliary torque which varies as a function of the degree of winding-up of the motor spring to counter variations in the motor torque. The equalization device includes a first and second magnetic elements being displaced from each other by exerting a magnetic force which varies as a function of the relative position of the first and second magnetic elements and produces the auxiliary torque.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: November 12, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Benoit Legeret, Davide Sarchi
  • Patent number: 10474107
    Abstract: Sub-assembly for watches, including an arbor including a magnetized or electrically charged surface pivoting inside a housing, and a pole piece subjecting this surface to a magnetic or electrostatic field about an axis, one pole piece cooperating axially with this surface to absorb a shock and then return the arbor to an operating position, and creating, in proximity to this surface, a magnetic or electrostatic field, which radially attracts the arbor towards a wall of the housing.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: November 12, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Jean-Philippe Rochat, Benoit Legeret, Davide Sarchi, Polychronis Nakis Karapatis
  • Patent number: 10468215
    Abstract: The timepiece includes a chronograph mechanism with a coupling device including an operating member and a switching member which can be switched alternately between two stable positions coupled state and uncoupled state. This timepiece includes a magnetic system formed of a first bipolar magnet fixed to the switching member, a second bipolar magnet fixed to the support of the switching device in order to continually offer a magnetic interaction with the first bipolar magnet, and at least one highly magnetically permeable element forming the operating member and able to undergo a reciprocating motion between two operating positions. The switching device is arranged so that, when the highly magnetically permeable element is in its first operating position, the two magnets generate between them a force of magnetic repulsion and so that, when the highly magnetically permeable element is in its second operating position, the two magnets generate between them a force of magnetic attraction.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: November 5, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Deirdre Lenoir, Davide Sarchi, Benoit Legeret, Stephane Beugin
  • Patent number: 10437199
    Abstract: The gong is made with a wire or a strip having an atypical shape for a watch striking mechanism. The gong includes a rectilinear part connected to a curved part. The rectilinear part and/or the curved part are connected to the same gong-carrier. The gong includes several notches made at defined geometric points on a portion of the length of the gong to adapt the natural vibration frequencies within an audible range between 1 kHz and 5 kHz, so that the sound produced by the vibrating gong is harmonious.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: October 8, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Younes Kadmiri, Thomas Frangne, Davide Sarchi
  • Patent number: 10324416
    Abstract: A method for maintaining and regulating frequency of a timepiece resonator mechanism around its natural frequency, the method including: at least one regulator device acting on the resonator mechanism with a periodic motion, to impose a periodic modulation of resonant frequency or quality factor or a position of a point of rest of the resonator mechanism, with a regulation frequency between 0.9 times and 1.1 times the value of an integer multiple of the natural frequency, the integer being greater than or equal to 2 and less than or equal to 10, and the periodic motion imposes a periodic modulation of the quality factor of the resonator mechanism, by acting on losses and/or damping and/or friction of the resonator mechanism.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: June 18, 2019
    Assignee: The Swatch Group Research and Development Ltd.
    Inventors: Thierry Hessler, Davide Sarchi, Marc Stranczl
  • Patent number: 10295960
    Abstract: A musical timepiece includes a gong fastened to a structure or a resonator of a watch case, the resonator rigidly assembled to the structure around a chamber, by lugs allowing vibration of the resonator within a determined frequency range, the chamber enclosing a sealing element forming with the lugs the only mechanical connection between the structure and the resonator. The structure or the resonator includes a groove receiving a gasket in contact with the structure and the resonator The structure structure or the resonator or the sealing element includes a rigid protruding relief portion compressing a gasket in its groove, with a hardness less than 20 Shore A, for minimum damping of the vibration of the resonator.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: May 21, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Younes Kadmiri, Sylvain Marechal, Stephane Cadau, Davide Sarchi
  • Patent number: 10241473
    Abstract: A method for maintaining and regulating frequency of a timepiece resonator mechanism around its natural frequency, the method including: at least one regulator device acting on the resonator mechanism with a periodic motion, to impose a periodic modulation of resonant frequency or quality factor or a position of a point of rest of the resonator mechanism, with a regulation frequency between 0.9 times and 1.1 times the value of an integer multiple of the natural frequency, the integer being greater than or equal to 2 and less than or equal to 10, and the periodic motion imposes a periodic modulation of the quality factor of the resonator mechanism, by acting on losses and/or damping and/or friction of the resonator mechanism.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: March 26, 2019
    Assignee: The Swatch Group Research and Development Ltd
    Inventors: Thierry Hessler, Davide Sarchi, Marc Stranczl
  • Patent number: 10234822
    Abstract: A timepiece oscillator includes a sprung balance assembly including a balance with a rim, which is returned by a balance spring and pivoted with respect to a structure, on a first side by a torsion wire, fixed by an anchoring element to the structure, and on a second side, opposite to the first side, by a contactless magnetic pivot. The balance includes a first pole embedded with the balance and the torsion wire, this first pole having a symmetry with respect to the axis of the sprung balance assembly, and cooperating with a second pole included in the structure, for the magnetic suspension of the first pole, and to exert on the distal end of the torsion wire, opposite to this anchoring element, a magnetic force for tensioning the torsion wire.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: March 19, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Benoit Legeret, Deirdre Lenoir, Davide Sarchi
  • Patent number: 10228659
    Abstract: Mechanism for regulating energy to achieve the function of a timepiece mechanism including a functional mobile component, controlling a dissipation of energy through eddy currents in the event of racing by this mobile component, including a magnetically permeable or magnetized rotor kinematically connected to this mobile component, and a magnetized or respectively magnetically permeable stator, facing this rotor in an annular area where these eddy currents develop, this rotor and this stator are external to each other, this rotor and/or this stator including an alternation of raised areas where it can move into superposition with the other in an interaction generating eddy currents, and hollow areas in which it cannot move into superposition with the other. Escapement mechanism including such a regulating mechanism, limiting the effect of accelerations on an escape wheel.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: March 12, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Sebastian Alagon Carrillo, Benoit Legeret, Davide Sarchi
  • Patent number: 10222754
    Abstract: The timepiece movement comprises a pivoting element, a bearing for a pivot of this pivoting element and an anti-shock device associated with this bearing and including a resilient member arranged to exert a restoring force on at least one endstone. The anti-shock device further includes a magnetic system comprising two magnets having opposite polarities and a highly magnetically permeable element arranged between these two magnets and secured to one of them, the two magnets being respectively fixed to a support of the anti-shock device and to the resilient member and arranged to produce between them, in association with the highly magnetically permeable element, an overall force of magnetic attraction on a first section of a possible distance of displacement for the endstone in the event of a shock and an overall force of magnetic repulsion on a second section of this distance of displacement corresponding to greater distances of separation than those of the first section.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: March 5, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Deirdre Lenoir, Davide Sarchi, Benoit Legeret
  • Patent number: 10222746
    Abstract: The mechanical timepiece movement includes an escapement having a pallet-lever arranged to move alternately into abutment with two banking elements in locking periods. The pallet-lever carries at least a first permanent magnet and the timepiece movement further includes a first element and a second element of high magnetic permeability and a second magnet and a third magnet respectively integral with first and second elements of high magnetic permeability and each arranged on an opposite side to a first magnet relative to the respective elements of high magnetic permeability. This magnetic system generates, in a first part of a first half vibration of any vibration of the pallet-lever, an overall force of magnetic attraction, defining a magnetic draw additional to the mechanical draw generated by the escape wheel, and, in a second part of this first half vibration, an overall force of magnetic repulsion.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 5, 2019
    Assignee: Montres Breguet S.A.
    Inventors: Davide Sarchi, Benoit Legeret, Benoit Junod, Polychronis Nakis Karapatis
  • Patent number: 10139433
    Abstract: A method for detecting an electrical current longitudinal variation in a power transmission system including a power cable. Electric losses and their location along the cable length can be detected. Current variation in a grounded metallic layer of a power cable is measured from Faraday rotation of polarised light travelling in a single-mode optical fiber wound in a radially external position with respect to the grounded metallic layer. Measurements of the Faraday rotation are carried out by means of polarization-sensitive optical time domain reflectometry (POTDR) or by polarization-sensitive optical frequency domain reflectometry (POFDR) while a direct current is injected in the metallic layer.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: November 27, 2018
    Assignee: PRYSMIAN S.P.A.
    Inventors: Davide Sarchi, Luca Palmieri
  • Patent number: 10095187
    Abstract: Watch with a timepiece movement, a resonator mechanism, including a magnetic escapement mechanism including an escape wheel set including a magnetized track, with a succession of areas according to a scrolling period in which its magnetic features are repeated, each area including an increasing magnetic field ramp followed by a magnetic field barrier with an increasing field and of higher field gradient that that of the ramp, the track includes a continuous, closed magnetic layer over the entire periphery of the escape wheel set, of constant thickness and variable width, whose geometry defines these magnetic field ramps and barriers, this escape wheel set cooperating with a sprung balance via a pivoting magnetic stop member comprising a pole piece arranged to cooperate alternately with an internal track and an external track of the magnetic layer.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: October 9, 2018
    Assignee: The Swatch Group Research and Development Ltd
    Inventors: Gianni Di Domenico, Dominique Lechot, Jerome Favre, Benoit Legeret, Davide Sarchi
  • Patent number: 10078310
    Abstract: The vertical coupling/uncoupling device includes a switching member and a control member, the latter being arranged to pivot about an axis of rotation to be able to be driven in rotation step-by-step successively into a plurality of distinct angular positions. The control member and the switching member respectively include a first magnetic structure and a second magnetic structure arranged to exhibit a magnet interaction therebetween. These first and second magnetic structures are arranged such that, depending on the angular position of the control member, a first magnetic force or a second magnetic force is produced, these first and second magnetic forces being oriented along said axis of rotation but in opposite directions. The switching member is subjected to an alternate movement between its first and second stable axial positions when the second magnetic structure is driven in rotation step-by-step in said given direction of rotation.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: September 18, 2018
    Assignee: Montres Breguet S.A.
    Inventors: Davide Sarchi, Benoit Legeret, Deirdre Lenoir, Jean-Philippe Rochat
  • Publication number: 20180253061
    Abstract: The timepiece movement includes a date ring having a plurality of display positions, and a device for positioning said ring in any one of the display positions. The positioning device comprises a lever and a magnetic system formed of a first fixed magnet, a second magnet integral with the lever and a magnetic structure integral with the ring and moving between the two magnets, this magnetic structure being formed of a highly magnetically permeable material and having a radial dimension that varies periodically to define a plurality of periods which correspond to the distances between the display positions. The magnetic axes of the two magnets are substantially aligned and their respective polarities are opposite. During the driving of the ring, the magnetic torque that is applied to the lever varies, so that it is pressed against the ring in the display positions but tends to move away from the ring on one part of the angular movement between these display positions.
    Type: Application
    Filed: February 27, 2018
    Publication date: September 6, 2018
    Applicant: Montres Breguet S.A.
    Inventors: Davide Sarchi, Deirdre Lenoir, Benoit Legeret
  • Publication number: 20180253060
    Abstract: The timepiece movement is provided with a movable element (22A) capable of being momentarily immobilised in any one of N discrete stable positions, and with a device (44) for positioning said movable element comprising a lever (26A) and a magnetic system (28) formed of a first magnet (30) integral with the lever, with N second magnets (32) integral with the movable element and arranged along an axis of displacement, and with a highly magnetically permeable element (34) arranged facing one polar end of the first magnet located on the side of the movable element. The polarity of the first magnet is reversed with respect to that of the second magnets. A first magnetic torque exerted on the lever carrying the first magnet has a first direction over a first section and a second direction, opposite to the first direction, over a second section of the distance between two successive stable positions, the first direction defining a return torque towards the movable element for a contact portion (46) of the lever.
    Type: Application
    Filed: February 27, 2018
    Publication date: September 6, 2018
    Applicant: Montres Breguet S.A.
    Inventors: Davide Sarchi, Deirdre Lenoir, Benoit Legeret
  • Patent number: 10018967
    Abstract: A method for orienting a timepiece component including ferromagnetic material, where, on both ends of this component, two magnetic fields each attract it onto a pole piece, with an unbalance in the intensity of these fields around this component, in order to create a differential in the forces thereon and to press one of these ends onto a contact surface of one of the pole pieces, and to hold the other end at a distance from the other pole piece. A magnetic pivot includes such a component with two ends. It includes a guide device with surfaces of two pole pieces each generating a magnetic field attracting one of these ends, the magnetic forces exerted on the two ends being of different intensity, in order to attract only one end into contact with only one of these pole piece surfaces.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: July 10, 2018
    Assignee: Montres Breguet S.A.
    Inventors: Sylvain Marechal, Davide Sarchi, Olivier Karlen, Arnaud Todeschini
  • Patent number: 9989922
    Abstract: A balance wheel including a rim connected to a hub with at least one arm, wherein the balance wheel includes an adjustable auxiliary temperature compensation system mounted in the space defined by the rim to allow adjustable temperature compensation of the balance wheel.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: June 5, 2018
    Assignee: Montres Breguet S.A.
    Inventors: Alain Zaugg, Davide Sarchi