Horological torque limiting mechanism
AssigneeETA SA Manufacture Horlogere Suisse
InventorJulien Christan
Life of this patent
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Abstract
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.
Claims21
An internal torque limiting mechanism for a horological movement, said torque limiting mechanism comprising:
- a first wheel including a first felloe and arranged to pivot about a first axis of rotation relative to a structure or a plate or a bridge, said first wheel including at least a first elastic arm which, in a free state of said first wheel, projects along the direction of said first axis of rotation relative to said first felloe, and
- at least a second wheel including a second felloe and arranged to pivot relative to said structure about a second axis of rotation parallel or merged with said first axis of rotation overlapping at least partially with said first wheel, where said second wheel includes at least a second surface arranged to engage in frictional pressure with said first wheel for a relative actuation thereof with one another, and
- a travel limiter fastened to said structure and which is arranged to hold said second wheel on said first wheel for the engagement thereof in frictional pressure in certain relative angular positions,
- wherein said second wheel includes a second arm forming a ramp and which, in a free state of said second wheel, projects along the direction of said second axis of rotation relative to said second felloe, said ramp being arranged to, in certain relative angular positions with respect to said first wheel, engage in frictional pressure with at least said first elastic arm of said first wheel, and, in further relative angular positions, allow a frictionless relative travel between said first wheel and the second wheel.
Dependencies are inferred from the claim text.