Comadur Sa

Sébastien Retrouvey

Bruno Besutti

Pierry Vuille

Sébastien Midol

Anthony Tapiz-delgado

Benoit Giry

A method is for manufacturing a stone, in particular for a timepiece, from a mineral body of monocrystalline or polycrystalline type. The method includes an ablation step in which the body is subjected to a material ablation by scanning on at least one face of the body using ultra-short pulse laser radiation whose duration is less than one hundred picoseconds, and whose beam is guided by a precession system having at least three axes to at least partially cancel the angle of the laser cone, which is due to the focusing of the laser. A mineral stone of monocrystalline or polycrystalline type, in particular for a horological movement, is likely to be obtained by the method. The stone includes in particular a face provided with a peripheral rim, in particular for laterally clamping an endstone in a bearing.

Stone, in particular for a horological movement, and the manufacturing method thereof

A method for manufacturing a stone for a timepiece from a mineral body of a monocrystalline type, the stone including a hole, includes ablating the body by scanning at least one face of the body with ultra-short pulse laser radiation from a laser for a duration less than one hundred picoseconds, and guiding a beam of the laser radiation using a precession system of at least three axes configured to at least partially cancel a conical focusing angle of the laser. The ablating includes digging of a cone of entrance to the hole. A mineral stone of monocrystalline type for a timepiece includes a face provided with a hole formed in a body of the stone, and a functional element at an entrance to the hole. The functional element has a shape of a cone.

Monocristalline type mineral stone equipped with a cone for centring a pivot, and manufacturing method thereof

A method for manufacturing a jewel of the polycrystalline type, in particular for a timepiece, the jewel including, for example, poly-ruby of the type al2O3Cr or Zirconia of the type ZrO2, the method including a first step of producing a precursor, and a second step of pressing the precursor in order to form a body, the pressing being carried out using a pressing device provided with an upper die and a lower die defining a pressing space in which the precursor is disposed, the device being provided with a wire passing through at least part of the lower die to open out into the pressing space, the lower die being capable of sliding about the wire, the pressing taking place by bringing the lower die and the upper die closer to one another to form a body comprising a bottom face provided with a hole.

Jewel, in particular for a horological movement, and the manufacturing method thereof

A wristlet including a first row with at least one central link, a second row and a third row disposed respectively on either side of the first row and each including at least one lateral link, a connecting rod positioned in the three aligned holes of the first, second and third rows, wherein the connecting rod includes a shoulder, and wherein each hole of the central link opens at one of its ends onto a hollow formed in the central link, the hollow being delimited by a first wall and by a second wall serving as a first banking and as a second banking for the shoulder when the central link pivots about the connecting rod so as to limit the amplitude of rotation of the central link about the connecting rod.

Wristlet with links made of a hard material

A wristlet including a first row with at least one central link, a second row and a third row disposed respectively on either side of the first row and each including at least one lateral link, a connecting rod positioned in the three aligned holes of the first, second and third rows. The lateral link is hollow and includes in its hollow an insert delimited by two external lateral walls, the connecting rod including at each end a first banking and a second banking respectively bearing on a portion of the external lateral wall when the lateral link pivots about the connecting rod so as to limit the amplitude of rotation of the central link about the connecting rod.

A method and device for manufacturing a bevelled stone, particularly for a timepiece are disclosed. A precursor is produced from a mixture of at least one material in powder form with a binder. The method includes pressing the precursor so as to form a green body, using a top die and a bottom die comprising a protruding rib, sintering the green body so as to form a body of the future stone in at least one material, the body including a peripheral face and a bottom face provided with a groove, and machining the body including a substep of planning the peripheral face up to the groove, such that an inner wall of the groove forms at least a flared part of the peripheral face of the stone.

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Chissey sur Loue, France

Sébastien Retrouvey