![]() In 2004, Thomas Prescher developed the first triple-axis tourbillon for the Thomas Prescher Haute Horlogerie with constant force in the carriage in a wristwatch. Greubel Forsey Double Tourbillon 30° mechanism Triple-axis tourbillon Triple-Axis-Tourbillon by Thomas Prescher A spherical differential connects the four rotating carriages, distributing torque between two wheels rotating at different speeds. In 2005, Greubel Forsey presented their Quadruple Tourbillon à Différentiel (QDT), using two double-tourbillons working independently. The Double Tourbillon 30° features one tourbillon carriage rotating once per minute and inclined at 30°, inside another carriage which rotates once every four minutes. Both men had been working together since 1992 at Renaud & Papi, where they developed complicated watch movements. Robert Greubel and Stephen Forsey launched the brand Greubel Forsey in 2004 with the introduction of their Double Tourbillon 30° (DT30). Double and quadruple tourbillons Greubel Forsey Double Tourbillon Technique, an example of which won the 2011 International Chronometry Competition held by the Horological Museum in Le Locle The device incorporates a modified system after a design by Henri Jeanneret. Thereby even force is always supplied to the oscillation regulating system of the double-axis tourbillon. ![]() ![]() Prescher invented the constant-force mechanism to equalize the effects of a wound and unwound mainspring, friction, and gravitation. The whole tourbillon is powered by a special constant-force mechanism, called a remontoire. Shown at the Baselworld 20 in Basel, Switzerland.Ī characteristic of this tourbillon is that it turns around two axes, both of which rotate once per minute. In 2003, inspired by this invention, the young German watchmaker Thomas Prescher developed for the Thomas Prescher Haute Horlogerie the first flying double-axis tourbillon in a pocket watch and, in 2004, the first flying double-axis tourbillon with constant force in the carriage in a wristwatch. In 1980 Anthony Randall made a double-axis tourbillon in a carriage clock, which was located in the (now closed) Time Museum in Rockford, Illinois, US, and was included in their Catalogue of Chronometers. The first working example was later constructed by Richard Good in 1978. Double-axis tourbillon Anthony Randall's double axis tourbillon as installed in a carriage clockĪnthony Randall invented the double-axis tourbillon in January 1977 and subsequently patented it. ![]() The carriage is released and locked with each vibration of the balance. The escape pinion is engaged with this stationary fourth wheel so when carriage is turned by the fourth pinion the escape wheel will also rotate. In the most common implementation of this, the tourbillon carriage is carried by the fourth pinion, within a stationary fourth wheel. The tourbillon was invented to complement the split bi-metallic balance which was inherently difficult to poise. Patented by Breguet in 1801, the single axis tourbillon minimizes the difference in rate between positions caused by poise errors. Types of tourbillon Single axis tourbillon An assembled tourbillon Tourbillons are still included in some modern wristwatches, where the mechanism is usually exposed on the watch's face to showcase it. In a tourbillon the escapement and balance wheel are mounted in a rotating cage, with the goal of eliminating errors of poise in the balance giving a uniform weight. In horology, a tourbillon ( / t ʊər ˈ b ɪ l j ən/ French: " whirlwind") is an addition to the mechanics of a watch escapement to increase accuracy, it was developed by the Swiss-French watchmaker Abraham-Louis Breguet and patented by Breguet on 26 June 1801. For other uses, see Tourbillon (disambiguation).
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