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Greubel Forsey’s Inventions

Double Tourbillon 30°

1st Invention

 

Inside a cage which rotates in four minutes, the interior cage containing the balance and spring assembly is inclined at an angle of 30° relative to the first cage and completes a revolution in sixty seconds. The combination of the 30° inclination with the different rotational speeds of the two tourbillons improves timekeeping by averaging out positional errors due to gravity in all usual wristwatch positions and especially in stable positions.

This invention beats at the heart of several timepieces in our collection.

Double Tourbillon 30 Blueprint
Greubel Forsey Double Tourbillon 30° Technique Red Gold Front Greubel Forsey Art Piece 1 Front
                     Double Tourbillon 30° Technique Red Gold                                                                    Art Piece 1

 

 

Quadruple Tourbillon

2nd Invention

 

Each of the four tourbillons connected to a spherical differential contributes independently to obtain a precise and reliable timing rate especially in stable positions. The spherical differential transmits the average timing rate of the four tourbillons, thus improving the chronometric performance of all the regulating organs.

This invention beats at the heart of several timepieces in our collection.

Greubel Forsey Quadruple Tourbillon Blueprint

Greubel Forsey Quadruple Tourbillon Secret Platinum Front Greubel Forsey Quadruple Tourbillon Asymetrique Rouge or 5N Front
                          Quadruple Tourbillon Secret Platinum                                         Quadruple Tourbillon Asymetrique Rouge Or5N

 

 

Tourbillon 24 Secondes

3rd Invention

 

The Tourbillon 24 Secondes uses a fast rotation speed and inclined angle to solve the problem of critical positions of the oscillator in relation to gravity. The 25° angle and the rapid rotation of the tourbillon cage significantly improve the chronometric performance of a system containing only one tourbillon, especially in stable positions. Consequently, we had to develop an inclined gearing profile and an ultra-light tourbillon cage to resolve the considerable mechanical constraints imposed by this system.

This invention beats at the heart of several timepieces in our collection.

Greubel Forsey Tourbillon 24 Secondes Blueprint
Greubel Forsey Tourbillon 24 Secondes Contemporain Bleu Or 5N Front Greubel Forsey Quantieme Perpertual QP a Equation Front

             Tourbillon 24 Secondes Contemporain Bleu Or 5N                                           Quantieme Perpertual QP a Equation

Greubel Forsey Tourbillon 24 Secondes Contemporain Tourbillon Secondes Front Greubel Forsey GMT Black Front
          Tourbillon 24 Secondes Contemporain Tourbillon Secondes                                                    GMT Black

 

 

Balancier Spiral Binôme

4th Invention

 

In order to improve the interaction between the balance and the balance spring, we explore the use of the same material for both components – a material which would be impervious to temperature variations and be non-magnetic in order to exploit its physical properties for the balance and the balance spring. We first explored the use of synthetic diamond, which has paved the way to research on other materials.

 

Greubel Forsey Balancier Spiral Binome Blueprint
 

 

Différentiel d’Egalité

5th Invention

 

The Différentiel d’Egalité is based on a spherical differential that receives energy from the mainspring barrel and releases it in constant amounts to the regulating organ. In order to maintain this constant rate, the mainspring barrel powers a secondary spring, which is rewound every five seconds. Placed before the regulating organ, the spring ensures a uniform transmission of energy by eliminating power variations from the mainspring barrel and correcting variations in torque generated by the gear train.

This invention is incorporated into our Différentiel d’Égalité timepiece.

Greubel Forsey Differentiel d'Eligalite Blueprint
 

 

Double Balancier

6th Invention

 

In order to obtain the average timing rate in a stable position, we explored using the Double Balancier, i.e. two oscillators positioned along two different axes at precise predetermined angles. Thanks to the combined effects of the spherical differential and the angle of the balances, this system helps to minimise the effects of gravity and maximise timing precision in stable positions.

This invention beats at the heart of several timepieces in our collection.

 

 

 

Le Computeur Mécanique

7th Invention

 

Our mechanical computer of the QP à Equation reinterprets certain functions of ancient astronomical clocks. It is composed of a set of coding wheels superimposed in a coaxial manner with movable programmed fingers. Depending on their rotation speeds and number of teeth, these wheels provide a variety of information (months with 30/31 days and leap years [February 28/29 days]).The mechanical computer also directly drives a system of sapphire disks, which display the equation of time, i.e. the difference between “apparent” solar time and mean time. This new invention is composed of 25 parts and is the subject of three new patents.

This invention regulates our QP à Équation.

Greubel Forsey Le Computeur Mecanique Blueprint  Greubel Forsey Quantieme Perpertual QP a Equation Front
                                                                                                                                        Quantieme Perpertual QP a Equation

 

 

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