A horological torque limiting mechanism, including a first wheel with a first elastic arm projecting from a first felloe, a second wheel including a second surface to engage in frictional pressure with the first wheel for the relative actuation thereof, a travel limiter fastened to a structure to hold the first and second wheels in frictional pressure in certain angular positions, the second wheel and/or the travel limiter and/or the structure including a relief forming a ramp, to, in certain angular positions relative to the first wheel, engage in frictional pressure with the first elastic arm, and, in further positions, allow a frictionless travel between the first wheel and the component bearing the relief, the second wheel includes a second arm forming a ramp projecting from a second felloe.

A horological torque limiting mechanism, including a first wheel with a first elastic arm projecting from a first felloe, a second wheel including a second surface to engage in frictional pressure with the first wheel for the relative actuation thereof, a travel limiter fastened to a structure to hold the first and second wheels in frictional pressure in certain angular positions, the second wheel and/or the travel limiter and/or the structure including a relief forming a ramp, to, in certain angular positions relative to the first wheel, engage in frictional pressure with the first elastic arm, and, in further positions, allow a frictionless travel between the first wheel and the component bearing the relief, the second wheel includes a second arm forming a ramp projecting from a second felloe.

A timepiece mechanism including a deformable rhombus including four coplanar segments pivotally connected in pairs by their vertices, including an input segment adjacent to an output segment, both pivoted about a pivot axis perpendicular to the plane of the rhombus and passing through a first vertex common to the input and output segments and locked in translation in the plane of the rhombus, a lever mounted to pivot about the pivot axis, the lever being kinematically connected in rotation, about the pivot axis, to a second vertex of the rhombus, opposite to the first vertex, a first locking member movable between a first locking position, in which the lever is locked in rotation, and a first unlocking position in which the first locking member does not hinder rotation of the lever, a second locking member movable between a second locking position, in which the second vertex is locked in translation in a radial direction, and a second unlocking position in which the second locking member does not hinder radial movement of the second vertex.

A timepiece mechanism including a deformable rhombus including four coplanar segments pivotally connected in pairs by their vertices, including an input segment adjacent to an output segment, both pivoted about a pivot axis perpendicular to the plane of the rhombus and passing through a first vertex common to the input and output segments and locked in translation in the plane of the rhombus, a lever mounted to pivot about the pivot axis, the lever being kinematically connected in rotation, about the pivot axis, to a second vertex of the rhombus, opposite to the first vertex, a first locking member movable between a first locking position, in which the lever is locked in rotation, and a first unlocking position in which the first locking member does not hinder rotation of the lever, a second locking member movable between a second locking position, in which the second vertex is locked in translation in a radial direction, and a second unlocking position in which the second locking member does not hinder radial movement of the second vertex.