US 10,474,107 B2Granted

Magnetic anti-shock system for a timepiece arbor

AssigneeMontres Breguet S.A.

InventorsJean-Philippe Rochat, Benoit Legeret, Davide Sarchi, Polychronis Nakis Karapatis

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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.

Claims19

Dependent claims

A timepiece sub-assembly for watches, comprising:

a main structure and an arbor pivotally movable about an axis of pivoting inside at least one housing of said main structure,
said arbor comprising at least one surface made of a magnetized or magnetically conductive material, and
said main structure including at least one pole piece, which is arranged to create, in proximity to the at least one surface, at least one magnetic field, for at least one of axial or magnetic retention of said arbor, wherein
the at least one pole piece is arranged to cooperate in axial and radial attraction or repulsion, along said axis of pivoting with the at least one surface, to maintain said arbor in abutment in said housing in an operative position, to allow a trip of said arbor during a shock, to absorb a radial shock and to return said arbor to said operating position after said shock ceases, by holding said arbor in contact on position stops or in contact on permanent magnets,
the at least one pole piece is arranged to create, in proximity to the at least one surface, the at least one magnetic field, which tends to radially attract said arbor towards a wall of said housing,
said main structure comprises a first structure comprising at least a first housing, at least inside which said arbor is pivotally movable, said first structure creating in said first housing said at least one magnetic field, substantially of revolution about said axis of pivoting, to subject said arbor to an effort tending to align said arbor along said axis of pivoting, and said main structure comprises, in a second housing arranged on said first structure or on a second structure comprised in said main structure, a magnetized banking surface, arranged to axially attract or repel, along said axis of pivoting, a magnetized front surface comprised in said arbor, and
said arbor includes at least one first upper shoulder housed inside said first housing and comprising at least on a surface thereof a magnetized or magnetically conductive material, said at least one first upper shoulder being subjected, inside said first housing, to said at least one magnetic field, generated by said first structure, and said arbor comprises at least one second lower shoulder housed inside the second housing comprised in said main structure or comprised in a third structure of said timepiece sub-assembly, said second housing forming a stop.

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Dependencies are inferred from the claim text.

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Abstract

A timepiece sub-assembly for watches, comprising:

a main structure and an arbor pivotally movable about an axis of pivoting inside at least one housing of said main structure,
said arbor comprising at least one surface made of a magnetized or magnetically conductive material, and
said main structure including at least one pole piece, which is arranged to create, in proximity to the at least one surface, at least one magnetic field, for at least one of axial or magnetic retention of said arbor, wherein
the at least one pole piece is arranged to cooperate in axial and radial attraction or repulsion, along said axis of pivoting with the at least one surface, to maintain said arbor in abutment in said housing in an operative position, to allow a trip of said arbor during a shock, to absorb a radial shock and to return said arbor to said operating position after said shock ceases, by holding said arbor in contact on position stops or in contact on permanent magnets,
the at least one pole piece is arranged to create, in proximity to the at least one surface, the at least one magnetic field, which tends to radially attract said arbor towards a wall of said housing,
said main structure comprises a first structure comprising at least a first housing, at least inside which said arbor is pivotally movable, said first structure creating in said first housing said at least one magnetic field, substantially of revolution about said axis of pivoting, to subject said arbor to an effort tending to align said arbor along said axis of pivoting, and said main structure comprises, in a second housing arranged on said first structure or on a second structure comprised in said main structure, a magnetized banking surface, arranged to axially attract or repel, along said axis of pivoting, a magnetized front surface comprised in said arbor, and
said arbor includes at least one first upper shoulder housed inside said first housing and comprising at least on a surface thereof a magnetized or magnetically conductive material, said at least one first upper shoulder being subjected, inside said first housing, to said at least one magnetic field, generated by said first structure, and said arbor comprises at least one second lower shoulder housed inside the second housing comprised in said main structure or comprised in a third structure of said timepiece sub-assembly, said second housing forming a stop.

4 more elements