Eta Sa Manufacture Horlogere Suisse

Martin Vautherot

Laurent Kaelin

Arthur Queval

A timepiece barrel for pivotal assembly between a plate and a bar and including at least one spring housed between a pivoting drum and a cover and hooked between, at the outer end thereof, the drum and at the inner end thereof, an arbor which pivots integrally with a ratchet about a pivot axis. The barrel includes a one-piece sub-assembly coaxial to the arbor and including the arbor and a boss including a collar for limiting axial shake of the drum, the collar carrying pivotal drive mechanisms for driving pivoting of the ratchet which is axially free in a direction of the pivot axis.

Timepiece barrel

A timepiece barrel for pivotal assembly between a plate and a bar and including at least one spring housed between a pivoting drum and a cover and hooked between the drum at an outer end thereof and an arbor at an inner end thereof, the arbor pivoting integrally with a ratchet about a pivot axis. The barrel includes a one-piece sub-assembly coaxial to the arbor and including, about a boss, at least the ratchet and/or the arbor, and the guide arbor in the plate is fitted into the boss which is integral with the ratchet, the boss forming the guide member in the bar, making it possible to assemble the bar and plate with subsequent attachment of the arbor.

A ratchet for winding a barrel, including an axial passage for fitting the ratchet onto an arbor carrying pivotal drive mechanism. The ratchet includes, in the axial passage, a strip spring permitting fitting of the ratchet onto the arbor, and exerting a bearing force on the pivotal drive mechanism, wherein the at least one strip spring forms a complementary drive for pivotally driving the arbor. A timepiece barrel for pivotal assembly between a bottom plate and a bridge includes a spring housed between a pivoting drum and a ratchet and hooked between, at an outer end thereof, the drum, and at an inner end thereof, an arbor, the arbor pivoting integrally with the ratchet about a pivot axis.

Timepiece barrel for pivotal assembly between a bottom plate and a bridge and including at least one spring housed between a pivoting drum and a ratchet and hooked between this drum at the outer end thereof and an arbour at the inner end thereof, this arbour pivoting integrally with this ratchet about a pivot axis. This barrel includes a single-piece sub-assembly, coaxial with this arbour and grouping together around a hub, this arbour and this ratchet in immediate proximity to this bottom plate, and which is pivoted on an upper shoulder in a bore of this drum on an end pipe whose outer shoulder pivots in a bore of this bridge or of a jewel comprised in this bridge.

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Publier, France

Martin Vautherot