Abstract: A balance wheel-hairspring oscillator (10) has a balance wheel shaft (18) intended to be pivotably mounted on a frame of a timepiece. A balance wheel (12) is secured to the balance wheel shaft (18). A hairspring (14) has an inner end (14a) secured to the balance wheel shaft and an outer end (14b) intended to be connected to a connecting member (16) to the frame. A transmission member (20, 22) is arranged to interact with an escapement. The balance wheel (12) and the hairspring (16) are arranged on either side of the transmission member.

Abstract: A one-piece arbor of a pivoting movable timepiece component, the one-piece arbor being made of one or more aligned parts. The one-piece arbor is magnetically inhomogeneous.

Abstract: The invention relates to a pivot pin for a timepiece movement including at least one pivot at at least one of the ends thereof, characterized in that said at least one pivot is formed of a composite material having a metallic matrix including at least one metal selected from among nickel, titanium, chromium, zirconium, silver, gold, platinum, silicon, molybdenum, aluminum or an alloy of the above metals, said matrix being charged with hard particles selected from among WC, TiC, TaC, TiN, TiCN, Al2O3, ZrO2, Cr2O3, SiC, MoSi2, Al N or a combination thereof, so as to limit the sensitivity of the pin to magnetic fields. The invention concerns the field of timepiece movements.

Abstract: The invention relates to a system (9) for securing a part (7) made of a material with no usable plastic domain, including a securing device (11) on an arbour (3) passing through a hole (8) in said part. According to the invention, the securing device (11) includes a recess (4) that communicates with the hole (8) in said part and securing means (6) attached to the arbour (3) and at least partially matching the shape of the recess (4), so as to make the movement of the part (7) integral with that of the arbour (3). The invention concerns the field of timepiece manufacture.

Abstract: A balance wheel assembly for clock works, and the like, the assembly including a base plate, lower and upper pivot blocks mounted on the base plate, the pivot blocks having opposed conical recesses therein, a vertical shaft pointed at either end disposed in the recesses, a balance wheel fixed to the shaft, and a magnet proximate the upper pivot block and operative to urge the shaft toward the upper pivot block against gravitational pull.