Comadur Sa

Montres Rado S.a.

Sylvain Boucard

Alain Geiser

Christian Verdon

Sébastien Bolzt

Jean-Mary Hawrylko

A bracelet having articulated links, including an articulation between a first link and a second link including a tongue that pivots in an opening between side flanges of this first link together forming a double clevis fitting, wherein, in the articulation, the first link or respectively the second link includes at least one external trunnion or respectively at least one internal trunnion arranged to pivot in an internal half-bearing of the second link, or respectively in an external half-bearing of the first link, the second link or respectively the first link includes at least an upper part and a lower part arranged to enclose and conceal therebetween each external trunnion or respectively each internal trunnion.

Articulated bracelet with hidden articulations

An item includes at least two sets of assembled elements that are connected to each other by a permanent securing device. The permanent securing device includes a pin mounted in a through hole of a central element of a set. This pin is mounted at each end in a blind recess of a side element belonging to another set. At one end, the pin is secured in the blind recess by a locking device, for example by a screw connection. At its other end, it is welded to a socket which is itself secured by a locking device in the blind recess of the side element.

Assembly of elements such as bracelet links

The invention relates to an assembly system including first and second parts each including a blind recess and at least one third part including a through hole. According to the invention, the assembly system further includes a permanent securing device including a pin mounted in the through hole of the at least one third part, the pin including, at a first end, a first means of locking one of the first and second parts in its blind recess, and a socket whose external wall includes a second means of locking the other of the first and second parts in its blind recess, and whose internal wall is welded to the second end of the pin in order to join the first, second and at least one third parts to each other with no plastic deformation of the first and second parts.

System of assembling at least three parts

The invention relates to a method () for fabricating a matt ceramic part () comprising the following steps: According to the invention, the method includes the following final step: The invention concerns the field of timepieces.

Method for fabricating a non-marking, matte ceramic

Housing insert for a spacer of a ceramic link for a bracelet, including a housing for receiving a spacer having one end. It includes an external machined portion arranged to cooperate with this housing and an internal machined portion including a substantially cylindrical bearing area, arranged to closely receive this end and having a smaller diameter than that of this end. An equipped link includes such a link and such an insert of this type fixed in this housing. A bracelet including includes a plurality of equipped lateral links into which removably mounted spacers are driven. This bracelet includes intermediate links assembled to pivot freely relative to these spacers or relative to pins pivotably mounted in these equipped links.

Watch bracelet with ceramic links

The invention proposes a method of locally colouring a part made of ceramic material of the metallic oxide type mainly including the following steps of taking a support for the part and a laser, able to move relative to each other in an XY plane, performing a plasma treatment of the part using a gas containing one element selected from among nitrogen an carbon, so as to convert a surface layer of metallic oxide, into a substantially stoichiometric ceramic chosen from among metal nitrides and carloides, locally illuminating the part with the laser beam so as to provide sufficient energy to cause a local change in colour by altering the stoichiometry of the surface layer, and scanning the surface of the part using the laser beam so as to form a determined pattern.

Growing community of inventors

Villers-le-Lac, France

Sylvain Boucard