Timepiece barrel with a twisted arbour
AssigneeETA SA Manufacture Horlogere Suisse
InventorsJulien CHRISTAN, Laurent KAELIN
Life of this patent
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Abstract
A twisted arbour barrel (1), including a barrel drum (2) provided with a housing, a spring arranged in the housing of the barrel drum (2), an arbour (4) at least partially passing through the housing, the spring being compressed by rotation of the arbour in a first direction of rotation (12), the arbour (4) being provided with a protruding end (9) of the drum (2), a ratchet (3) arranged on the drum (2), the ratchet (3) being configured to allow the rotation of the arbour (4) in the first direction of rotation (12), the protruding end (9) passing through the ratchet (3) through an opening (14) cooperating by interlocking with the protruding end (9), the protruding end (9) of the arbour (4) having a twisted shape around its axis.
Claims13
A twisted arbour barrel (1), comprising
- a barrel drum (2) provided with a housing,
- a spring arranged in the housing of the barrel drum (2),
- an arbour (4) at least partially passing through the housing, said spring being compressed by rotation of said arbour in a first direction of rotation (12), the arbour (4) being provided with a protruding end (9) of said drum (2),
- a ratchet (3) arranged on the drum (2), the ratchet (3) being configured to allow the rotation of the arbour (4) in the first direction of rotation (12), the protruding end (9) passing through the ratchet (3) through an opening (14) cooperating by interlocking with the protruding end (9),
- wherein said protruding end (9) of the arbour (4) has a shape twisted around its axis.
Dependencies are inferred from the claim text.