The gong is made with a wire or a strip having an atypical shape for a watch striking mechanism. The gong includes a rectilinear part connected to a curved part. The rectilinear part and/or the curved part are connected to the same gong-carrier. The gong includes several notches made at defined geometric points on a portion of the length of the gong to adapt the natural vibration frequencies within an audible range between 1 kHz and 5 kHz, so that the sound produced by the vibrating gong is harmonious.

A repeater including an hours piece mounted to rotate between a rest position and a reading position; a device for regulating the angular speed of the hours piece, which includes a rotor and a system for braking the rotor; and a transmission gear train between the hours piece and the rotor, this gear train including a disengageable primary mobile able to adopt two configurations: a) an engaged configuration in which the primary mobile couples the hours piece to the rotor while the hours piece is moved from its reading position to its rest position; b) a disengaged configuration in which the primary mobile decouples the rotor from the hours piece as soon as the latter is stopped in the rest position.

A repeater including an hours piece mounted to rotate between a rest position and a reading position; a device for regulating the angular speed of the hours piece, which includes a rotor and a system for braking the rotor; and a transmission gear train between the hours piece and the rotor, this gear train including a disengageable primary mobile able to adopt two configurations: a) an engaged configuration in which the primary mobile couples the hours piece to the rotor while the hours piece is moved from its reading position to its rest position; b) a disengaged configuration in which the primary mobile decouples the rotor from the hours piece as soon as the latter is stopped in the rest position.

A repeater mechanism includes an hour snail, an hour rack carrying an hour beak and rotatably mounted about an hour axis between a rest position and a read position, an hour spring, which returns the hour rack to its read position, a pulley rotatably mounted about a pulley axis and which forms a spiral-shaped peripheral cam path, a chain able to be wound on the pulley, the chain being hooked on the pulley and on the hour rack, and a return spring coupled to the pulley and via which the pulley pulls the hour rack, via the chain, into its rest position.

A repeater mechanism includes an hour snail, an hour rack carrying an hour beak and rotatably mounted about an hour axis between a rest position and a read position, an hour spring, which returns the hour rack to its read position, a pulley rotatably mounted about a pulley axis and which forms a spiral-shaped peripheral cam path, a chain able to be wound on the pulley, the chain being hooked on the pulley and on the hour rack, and a return spring coupled to the pulley and via which the pulley pulls the hour rack, via the chain, into its rest position.

Repeater mechanism (5), comprising: An hour part (10), which is mobile between a resting position and a reading position; An hour spring (19) which returns the hour part (10) towards its reading position; A chain (40) which is hooked to the hour part (10); A barrel (32) which comprises a shaft (33), a drum (34), a spring (35), a pulley (38) which is mobile in rotation relative to the shaft (33) and on which the chain (40) is hooked, and also a ratchet which is integral in rotation with the barrel shaft (33) and: coupled to the pulley (38) as long as the hour part (10) exerts a traction force on the chain (40); uncoupled from the pulley (38) as soon as this traction force is cancelled out; A pulley spring (38) which is interposed between the ratchet and the pulley (38).

Repeater mechanism (5), comprising: An hour part (10), which is mobile between a resting position and a reading position; An hour spring (19) which returns the hour part (10) towards its reading position; A chain (40) which is hooked to the hour part (10); A barrel (32) which comprises a shaft (33), a drum (34), a spring (35), a pulley (38) which is mobile in rotation relative to the shaft (33) and on which the chain (40) is hooked, and also a ratchet which is integral in rotation with the barrel shaft (33) and: coupled to the pulley (38) as long as the hour part (10) exerts a traction force on the chain (40); uncoupled from the pulley (38) as soon as this traction force is cancelled out; A pulley spring (38) which is interposed between the ratchet and the pulley (38).

An acoustic timepiece display mechanism includes a chronograph repeater for the acoustic display, by a striking mechanism, of a duration measured by a chronograph mechanism. The striking mechanism includes a winding lever for driving a rack to move a striking unit including a rack pinion integral with a striking ratchet, to move a striking rack to read the magnitude concerned and to release a corresponding strike function. The acoustic display mechanism includes, between a control mechanism included in the chronograph mechanism and the winding lever, a safety mechanism arranged, depending on the position of the strike wheel set, to allow or prevent travel of an operating lever of the control mechanism of the chronograph mechanism, which operating lever is arranged to be pivoted under the action of a chronograph start pusher.

An acoustic timepiece display mechanism includes a chronograph repeater for the acoustic display, by a striking mechanism, of a duration measured by a chronograph mechanism. The striking mechanism includes a winding lever for driving a rack to move a striking unit including a rack pinion integral with a striking ratchet, to move a striking rack to read the magnitude concerned and to release a corresponding strike function. The acoustic display mechanism includes, between a control mechanism included in the chronograph mechanism and the winding lever, a safety mechanism arranged, depending on the position of the strike wheel set, to allow or prevent travel of an operating lever of the control mechanism of the chronograph mechanism, which operating lever is arranged to be pivoted under the action of a chronograph start pusher.

A timepiece display mechanism includes a rotating display member for displaying a magnitude other than the current time of day, or a position in a cycle. The rotating display member is integral in rotation with a snail cooperating with the beak of a striking rack included in a striking mechanism integrated in or juxtaposed with this display mechanism, to strike a numerical value characteristic of this magnitude, or respectively of this position. The display mechanism is more particularly a chronograph mechanism including a seconds snail integral with a main chronograph wheel, for counting the seconds and cooperating with a seconds rack, and a minute snail integral with a minute counter wheel for counting the minutes and cooperating with a minute rack, in order, after timing a duration, to strike the minutes and seconds of the timed duration.