Montres Breguet S.a.

Stephane Beugin

Davide Sarchi

Polychronis Nakis Karapatis

Nakis Karapatis

Sylvain Marechal

Gaetan Villard

Lucien Germond

Benoit Legeret

Benoit Junod

Deirdre Lenoir

Fabio Sciascia

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.

Timepiece comprising a device for switching a timepiece mechanism

Balance spring stud including, around a housing receiving a balance spring of reference thickness, a one-piece component made of a shape memory alloy and including two lugs, each arranged to rest on one of the surfaces of the balance spring, and wherein, in the free state, the minimum width of the air gap of the lugs is greater than the maximum value of the reference thickness when the component is in an open position corresponding to a martensitic structure, and wherein the maximum width of the air gap is less than the minimum value of the reference thickness when the component is in a closed position corresponding to an austenitic structure, and the balance spring includes an area of lesser thickness having a minimum thickness equal to the reference thickness, surrounded by areas of large thickness having a minimum thickness greater than the reference thickness.

Balance spring stud for a timepiece

Watch cannon-pinion including a first bore for receiving a pivot-shank including, on either side of a recess, a first shoulder and a second shoulder. This cannon-pinion is made in two parts and includes, on the one hand, a body comprising internally the first bore and externally a support shoulder, and on the other hand, a shape memory alloy ring including a second bore, and, in the free state, the second bore has a larger diameter than that of the support shoulder when the ring is in a martensitic structure, and a smaller diameter than that of the support shoulder when the ring is in an austenitic structure.

Watch cannon-pinion

Escapement mechanism () for a watch movement including a pallet lever () with a fork () and a roller device () with an impulse-pin coupled to a balance (). The fork includes an entry horn () and an exit horn (), the impulse-pin including a first cam portion () configured to engage the entry horn, and a second cam portion () configured to engage the exit horn. The first cam portion includes a first cam surface () configured to engage the entry horn on a first level (), and the second cam portion includes a second cam surface () configured to engage the exit horn on a second level (), the first and second levels being staggered in a direction parallel to the axis of rotation (A) of the roller device.

Escapement mechanism for a watch movement

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.

Growing community of inventors

Les Rousses, France

Stephane Beugin