Eta Sa Manufacture Horlogere Suisse

Romain Besuchet

Pascal Lagorgette

Stéphane Baleon

A navigation instrument including an orientation angle calculation unit, in particular the first and second orientation angles, wherein the orientation angle calculation unit is configured to be able to determine the first and second orientation angles in a given order and also in reverse order; and wherein the calculation unit is arranged to be able to choose between said given order and said reverse order, to calculate the first and second orientation angles, based on a comparison between an indicator of a risk of error, quantifying a risk of instability of said unit during the determination of the first and second orientation angles, and a predetermined threshold.

Navigation instrument with tilt compensation and associated method

An electromechanical horological movement including an analogue time display device and provided with at least one electromechanical motor, to drive at least one indicator of the analogue time display, and a generator including a rotor and associated with an oscillating mass coaxial with the time display device, this horological movement including a first wheel provided with a shaft, coaxial with said indicator, which is guided in rotation, in a main embodiment, by a fixed cylindrical tube around which is rotatably mounted at least one cannon of the time display device. The first wheel is in meshing relation with the rotor of the generator and is fixedly connected to the oscillating mass, on the side opposite the analogue time display, so that this oscillating mass can rotate the rotor of the generator via the first wheel.

Horological movement comprising a generator

Navigation instrument with tilt compensation mounted on or integrated into a wearable device and associated method

An electromechanical watch including an electromechanical motor () mechanically coupled to an analogue display (AD) and formed by two coils (B, B) through which the magnetic circuit () of the stator passes. A first of the two coils is connected to a voltage detection circuit (CD, CD) arranged to be able to detect any voltage induced in this first coil during intervals of time occurring, in a stepping functioning mode of the motor, between drive pulses to detect whether an unwanted step is made by the rotor () during these intervals of time. The electromechanical watch includes at least one switch (T, T, T) that is controlled by an electronic control circuit (CEC) to short-circuit the second coil during each of said intervals of time, in order to passively hold the rotor in the idle position in which it is situated momentarily between the drive pulses.

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Yverdon-les-Bains, Switzerland

Romain Besuchet