Abstract: Acoustic timepiece display mechanism with a chronograph repeater for the acoustic display, by a striking mechanism, of a duration measured by a chronograph mechanism, this striking mechanism including a winding lever for driving a rack to move a striking rack in order to read the magnitude concerned and to release a corresponding strike function, this acoustic display mechanism includes, between the mechanism controlling the chronograph mechanism and the winding lever, a mechanical connection arranged, depending on the position of a control cam of the chronograph mechanism indirectly defining a variable secondary direction of the winding lever, to isolate or not to isolate the winding lever from a winding pusher operated in a single pusher direction by a user to set off the acoustic display of the timed duration.

Abstract: A shock absorbing coupling device for a timepiece, includes a coupling wheel (2) able to take a coupled position and an uncoupled position, a coupling member (1) bearing the coupling wheel and a coupling cam (6) engaging with the coupling member (1) to define the coupled position and uncoupled position of the coupling wheel (2). The device also includes a locking member (12) rigidly attached to the coupling cam (6) and an intermediate member (9) controlled by the coupling member (1). The intermediate member (9) is intended to engage with the coupling member (1) and the locking member (12) to prevent or limit the movement of the coupling member (1) under the effect of a shock when the coupling wheel (2) is in the coupled position, to thus avoid the coupling wheel (2) leaving the coupled position.

Abstract: A device for holding a wheel set of a timepiece movement mounted on a main plate includes a lever, intended to be mounted to slide on the main plate of the timepiece movement between a first and a second position and arranged to move in translation between the two positions. The lever includes, at a first end, a locking beak cooperating with a slot of a ring attached to the wheel set to hold and to guide the wheel set in rotation in the first position, and leaving the wheel set free in the second position, the lever being arranged to move in translation, between the retracted position and the deployed position.

Abstract: The present invention relates to a tourbillon of a movement having: a rotatably mounted rotating carriage (6) connected to a second pinion (46), a balance (12) mounted on the rotating carriage (6) relative to a balance shaft (28) and also having an escape wheel (16) mounted on the rotating carriage (6) and operatively connected to the balance (12) via a lever, characterized by: a brake element (30) arranged on the rotating carriage (6), which can be brought into engagement with the balance (12) and is movable axially to the balance shaft (28).

Abstract: The invention relates to a radiation device that includes a housing, a light-emitting unit and a light-absorbing unit which is provided with an inlet opening and a reflector element. The reflector element extends across the entire distance between the light-emitting unit and the inlet opening of the light-absorbing unit.

Abstract: In a band compression apparatus, an input signal is separated into high- and low-frequency components H and L by an LPF and an adder. The component H is in-frame-averaged by an in-frame average circuit. The component L is output as a signal S.sub.3 having a large energy via a field delay circuit and a switch circuit. An in-frame difference of the low-frequency component L is obtained by a field delay circuit and an adder. This in-frame differential signal S.sub.2 is added to an in-frame average signal S.sub.1 by an adder. A signal S.sub.4 having a small energy is obtained by this addition. In a band restoration apparatus the signals S.sub.3 and S.sub.4 are separated into signals of two fields by an adder and a switch circuit. A signal S.sub.5 consisting of the components L and H is obtained in one field. A signal S.sub.2 consisting of only the component L is obtained in the other field. The signal S.sub.5 is output via a switch circuit. The signal S.sub.2 is added to the signal S.sub.

Abstract: A timer system (10,110,210) of two or more timers (10,110,210) measures the response time between an initiating event and a dependent event. The initiating and dependent events may be physically separated or electrically isolated. The timer system (10,110,210) permits recording of associated initiating and dependent events for a response time test followed by the recording of additional associated initiating and dependent events for additional response time tests while the timers remain separated. Thus, the timer system (10,110,210) permits serial recording of information for a large number of response time tests. The timers (10,110,210) may be identical. The timers (10,110,210) are interconnected and synchronized, then disconnected and separated to record the time of occurrence of the physically separated or electrically isolated events. The timers (10,110,210) are then again interconnected for a simultaneous recording of the elapsed time on each timer.

Abstract: A system for the control of a wheel for driving a chronograph hand in rotation comprising a device for locking the hand-wheel, which includes a locking shoe mounted on a support connected to the return-to-zero lever and to the coupling rocker, so that the movement of the hand-wheel away from the rocker and the lever results in a movement of the locking shoe towards the hand-wheel and in their mutual engagement.