Abstract:
Method for maintaining and regulating the frequency of a timepiece resonator mechanism around its natural frequency (ω0) Includes a regulator device acting on the resonator with a periodic motion which requires a periodic modulation of at least the resonant frequency of said resonator, by requiring at least a modulation of the active length of a spring in the resonator mechanism, with a regulation frequency (ωR) that is between 0.9 times and 1.1 times the value of an integer multiple of the natural frequency (ω0). The integer is greater than or equal to 2 and less than or equal to 10.
Abstract:
A shock absorber device for an arbor of a timepiece element including: a support including a base cup surmounted by a peripheral rim, which is delimited, opposite the cup, by an upper surface, the cup and the rim together defining a housing; a pivot system extending along an arbor, the pivot system being arranged in the housing and including a base including an elastic return mechanism at the periphery thereof, formed by at least one curved arm, including an opening in which is inserted a pivot element configured to cooperate with the arbor. The at least one curved arm is used for locking the pivot system in a bayonet fitting.
Abstract:
A display assembly for a portable object includes a first, at least partially transparent, emissive display device located on the side of an observer, a second reflective display device and a solar cell being arranged, in that order, underneath the first emissive display device. The second reflective display device is capable of switching between a transparent state, in which the device does not display any information, and a reflective state, when activated.
Abstract:
A race start assistance method for a boat participating in a regatta including a pre-race having a duration before the crossing of the start line, the method including a first step intended to permit the creation and storage of the start line in virtual form, and the determination of the instantaneous speed of the boat and its position with respect to the start line, in order to provide at least one indication on how to proceed in the pre-race.
Abstract:
The timepiece comprises means for indicating the sunrise and sunset taking account of seasonal variations. These means comprise a sphere reproducing the terrestrial globe, a shell arranged concentrically to the sphere and arranged to demarcate one portion of the terrestrial globe where it is night from another portion where it is day by indicating the position of the Earth's terminator. The shell can pivot about the globe on two axes perpendicular to each other. The shell is driven by the movement so as to rotate at a rate of one revolution per 24 hours about the polar axis. A disconnecting mechanism is controlled by an annual cam which has a profile representative of the tilt of the Sun with respect to the equatorial plane. The disconnecting mechanism controls the tilt of the shell about the axis by means of a drive shaft concentric to the polar axis.
Abstract:
Device for detecting the position of at least a first and a second hand of an electromechanical watch, said first and second hands moving above a dial, the detection device including a single light source emitting a light beam towards the first and second hands, and a first and a second light detection system, the light source and the first and second light detection systems being mounted on or underneath the dial, the light source and the first and second light detection systems being arranged so that, in a determined position of the first hand, the light beam emitted by the light source is reflected by the first hand towards the first detection system, and in a determined position of the second hand, the light beam emitted by the light source is reflected by the second hand towards the second detection system.
Abstract:
A device for measuring the accuracy of a mechanical watch includes a time reference source, a calculating mechanism, and another data processing unit. The time reference source is formed by an internal time reference source, or by a receiving and processing mechanism arranged to receive and process signals transmitted by an external time source to permanently update a repeater clock internal to the device. The calculating mechanism is arranged to calculate time differences between display values, and/or between time reference points provided by the time reference source, and to calculate a variation in rate. The another data processing unit is arranged to store and process at least one variation in rate calculated by the calculating mechanism, and/or a viewing mechanism arranged to display at least one variation in rate calculated by the calculating mechanism.
Abstract:
Regulating members for a mechanical timepiece, specifically a system based on magnetic interaction between a resonator, in a form of a tuning fork for example, and an escape wheel, as a magnetic escapement. In the system plural areas of magnetic interaction between the resonator and the escape wheel are arranged such that torques produced at the escape wheel by the interactions compensate each other if the escape wheel is not synchronized at the frequency of the resonator. This results in negligible torque in the escape wheel when the escape wheel rotates slowly in a direction of an arrow or opposite direction. This allows the timepiece to start with a low mainspring torque and without any start procedure or device and provides better resistance of the timepiece against a loss of synchronization in event of a shock.
Abstract:
Timepiece resonator oscillating at a natural frequency, comprising one oscillating member and oscillation maintenance means, this oscillating member carrying a regulator oscillating at a regulation frequency comprised between 0.9 times and 1.1 times the value of an integer multiple greater than or equal to 2 of the natural frequency, this resonator is included in a timepiece movement for a timepiece, particularly a watch, and this regulator imposes a periodic modulation of the resonant frequency and/or quality factor and/or point of rest of this resonator.
Abstract:
The timepiece comprises means for indicating the sunrise and sunset taking into account seasonal variations (17, 27). These means comprise a sphere (17) representing the Earth, a shell (27) arranged concentrically to the sphere and arranged to delimit a part of the globe where it is night time from another part where it is daytime by indicating the position of the Earth's terminator. The shell can pivot around the globe along two perpendicular axes (X-X, Y-Y). The shell is driven by the movement in order to revolve at the rate of one revolution every 24 hours around the polar axis (X-X). A differential mechanism (50) is controlled by a year cam (72) that has a profile representing the inclination of the sun in relation to the equatorial plane. The differential mechanism controls the inclination of the shell around the axis (Y-Y) by means of a drive shaft (35) concentric to the polar axis (X-X).