Abstract: A pivoting assembly includes an arbor rotatably mounted between two bearings, a member mounted between a shoulder of the arbor and a resilient washer, at least one of the two bearings including a limit stop which is arranged to enter into direct contact with the resilient washer in order to restrict the relative movement between the arbor and its bearings.

Abstract: 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.

Abstract: Timepiece barrel with a drum coaxial to a barrel arbour in a direction arranged to confine a barrel spring hooked to the drum and to a core coaxial to the barrel arbour and guided thereon. The core pivots in a bore of the drum, and includes a first stopping surface limiting the axial travel of the core, in the direction, relative to an inner face of the drum, and a second stopping surface opposite the first and limiting the axial travel of the core, relative to an outer face of the drum, which is arranged, on the one hand, imprisoned between the first stopping surface and the second stopping surface, and on the other hand to pivot freely about the core.

Abstract: 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.

Abstract: A timepiece includes: —a barrel bridge (33), and—a barrel mounted on the barrel bridge, the barrel having: —a drum (20) which includes an end wall and side walls, —an arbor (14) which passes through the center of the drum, —a leaf spring housed in the drum and engaging at a first end with the arbor and at a second end with the drum, and—a cover (28) through which the arbor passes freely and which closes the drum, —a ratchet wheel (30) secured to the arbor to tension the leaf spring. The drum is pivoted by a first ball bearing including an intermediate ring (36), an inner ring (42) secured to the arbor and an outer ring (38), one of the intermediate ring and the outer ring being fixed to the barrel bridge and the other being secured to the end wall.

Abstract: 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.

Abstract: Timepiece barrel (1) with a drum (2) coaxial to a barrel arbour (3) in a direction (D) arranged to confine a barrel spring (4) hooked to said drum (2) and to a core (5) coaxial to said barrel arbour (3) and guided thereon. Said core (5) pivots in a bore (21) of said drum (2), and includes a first stopping surface (51) limiting the axial travel of said core (5), in said direction (D), relative to an inner face (22) of said drum (2), and a second stopping surface (52) opposite the first (51) and limiting the axial travel of said core (5), relative to an outer face (23) of said drum (2), which is arranged, on the one hand, imprisoned between said first stopping surface (51) and said second stopping surface (52), and on the other hand to pivot freely about said core (5).

Abstract: A timepiece includes:—a barrel bridge (33), and—a barrel mounted on the barrel bridge, the barrel having:—a drum (20) which includes an end wall and side walls,—an arbor (14) which passes through the centre of the drum,—a leaf spring housed in the drum and engaging at a first end with the arbor and at a second end with the drum, and—a cover (28) through which the arbor passes freely and which closes the drum,—a ratchet wheel (30) secured to the arbor to tension the leaf spring. The drum is pivoted by a first ball bearing including an intermediate ring (36), an inner ring (42) secured to the arbor and an outer ring (38), one of the intermediate ring and the outer ring being fixed to the barrel bridge and the other being secured to the end wall.