Transmission mechanism for an automatic winding chain
AssigneeRolex SA
InventorPierre Villaret
Life of this patent
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Abstract
The transmission mechanism (110) for an automatic winding chain for a timepiece (400) includes a series assembly of a first freewheel (40) functioning by wedging, a reverser (50) including at least one unidirectional coupling functioning by obstacle or at least one second freewheel (51a, 51b) functioning by obstacle, and a winding mobile mass (60).
Claims22
A transmission mechanism for an automatic winding mechanism for a timepiece including a series assembly of:
- a first freewheel functioning by wedging,
- a reverser including at least one unidirectional coupling functioning by obstacle or at least one second freewheel functioning by obstacle, and
- a winding mobile mass,
- wherein a first reduction ratio between an output of the reverser and an input of the first freewheel is less than 8.
An automatic winding chain or automatic winding module for a timepiece including a transmission mechanism including a series assembly of:
- a first freewheel functioning by wedging,
- a reverser including at least one unidirectional coupling functioning by obstacle or at least one second freewheel functioning by obstacle, and
- a winding mobile mass,
- wherein a first reduction chain extending from the winding mobile mass to the first freewheel has a second reduction ratio of less than 6.
An automatic winding chain or automatic winding module for a timepiece including a transmission mechanism including a series assembly of:
- a first freewheel functioning by wedging,
- a reverser including at least one unidirectional coupling functioning by obstacle or at least one second freewheel functioning by obstacle, and
- a winding mobile mass,
- wherein a second reduction chain extending from the first freewheel to a ratchet of the barrel has a third reduction ratio greater than 20.
Dependencies are inferred from the claim text.