Spherical differential for 4 Tourbillons!
Flirting with perfection
While their Double Tourbillon 30° set a new benchmark for Tourbillon wristwatch performances, Greubel Forsey is currently seeking a higher level with its second eXperimental movement, which already equips some future prototypes of the Quadruple Tourbillon à Différentiel Sphérique.The idea of associating four Tourbillons within a system at the heart of which is a spherical differential capable of constantly handling and redistributing the energy at work within an operating wristwatch. This represents a vital stage in the development of Greubel Forsey, which thereby wishes to offer a timepiece with a rate approaching that of absolute theoretical precision... The genius of this new model lies in a mechanical system already known in itself, but entirely new in the field of technical Haute Horlogerie as applied to Tourbillon mechanisms.
At a rate of one rotation in two and a half minutes, the spherical differential redistributes the energy via the central pinion with its conical profiled teeth. This element which is central to the Spherical Differential and also to the entire system of four cages, acts like a seesaw and manages the overall balance, constantly seeking out the slightest variation. It remains virtually motionless when the system is in a perfect state of equilibrium.
While their Double Tourbillon 30° set a new benchmark for Tourbillon wristwatch performances, Greubel Forsey is currently seeking a higher level with its second eXperimental movement, which already equips some future prototypes of the Quadruple Tourbillon à Différentiel Sphérique.The idea of associating four Tourbillons within a system at the heart of which is a spherical differential capable of constantly handling and redistributing the energy at work within an operating wristwatch. This represents a vital stage in the development of Greubel Forsey, which thereby wishes to offer a timepiece with a rate approaching that of absolute theoretical precision... The genius of this new model lies in a mechanical system already known in itself, but entirely new in the field of technical Haute Horlogerie as applied to Tourbillon mechanisms.
Directly connected to the small seconds indication, this original micro-mechanism enables perfect averaging of the slightest variations in rate, much like the differential attached to the driving wheels on a car and which distributes the torque between these two exits while allowing them to rotate at different speeds.In the Quadruple Tourbillon à Différentiel Sphérique, each of the four Tourbillons independently contributes to achieving an extremely high-precision rating average. As they are not synchronous, their relative dispositions further diminish the risk of an unfavourable position, since the differential acts as a final corrector by ensuring an average of the averages, or by once again dividing any possible tiny imprecision by two.The quest for perfect balance
At a rate of one rotation in two and a half minutes, the spherical differential redistributes the energy via the central pinion with its conical profiled teeth. This element which is central to the Spherical Differential and also to the entire system of four cages, acts like a seesaw and manages the overall balance, constantly seeking out the slightest variation. It remains virtually motionless when the system is in a perfect state of equilibrium.
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