F.P. Journe Chronometre a Resonance User manual

User manual -Chronomètre à Résonance
A unique design based on an exclusive mechanism
English
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With the invention of the pendulum, watchmakers noticed that their beat often interfered with the environment and it was not
unusual for a pendulum clock to stop, on its own, when it entered into resonance with the driving-weight hanging from the cords.
The first to get the feeling that one might turn this disadvantage into an asset was Antide Janvier, a particularly brilliant watch-
maker or “mechanical engineer” as he described himself born in 1751, in St. Claude, France. His idea was to build two complete move-
ments with two precision escapements and place them close to each other, ensuring that the two pendulums were hanging from the
same construction. Just as he imagined, the pendulums recovered the energy dissipated by one another and began to beat together,
thus entering into resonance.
Functioning as such, the movements are protecting themselves from outside vibrations, considerably enhancing their preci-
sion. Around 1780, Antide Janvier built two precision regulators, one of which is preserved at the Paul-Dupuy museum in Toulouse,
while the second belongs to the private collection of Montres Journe SA in Geneva. A third regulator is kept at the Patek Philippe
Museum in Geneva.
Thirty years later, Abraham- ouis Breguet built a resonance regulator for ouis XVIII, King of France, which is now part of the
collection of the Musée des Arts et Métiers in Paris. He built a second piece for the King of England, George IV, which is housed at
Buckingham Palace. He also made a pocket-watch based on the same principle for each of these famous characters.
To my knowledge, no-one else in watch making took any further interest in this fascinating physical phenomenon! The advan-
tages of the resonance in terms of precision led me to pursue my own personal research and attempts. After fifteen years of work, I was
able to adapt this very phenomenon to a wristwatch for the second model of the Souveraine collection: the Chronomètre à Resonance.
I felt that this resonance system was particularly well suited for the various wrist movements; especially the repeated shocks that can
occur on the watch mechanism that are so detrimental to its smooth running.
François-Paul Journe
Preface
Chronomètre à Résonance
An emblematic timekeeper_

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Any animated element transmits a vibration to its environment. When another element picks up this vibration, it absorbs its
energy and begins to vibrate at the same frequency. The first is called the “exciter” and the second the “resonator”. This physical phe-
nomenon known as “resonance” is an integral part of our daily lives and yet we hardly even notice it.
When you are looking for a channel on the radio, it crackles until the chosen wavelengths meet those of the transmitter: only
then do they harmonise and begin resonating together.
Resonance concerns many fields, including those related to mechanical engineering, music and human beings. As musician
Keith Jarrett had confirmed in our first catalogue: “This is particularly obvious in music, with lutes and sitars, for example, that have
strings which only purpose is to vibrate by resonance. The musician never touches them, despite their proximity to the strings that are
plucked.”
Two centuries after the discovery of the phenomenon, François-Paul Journe undertook the challenge with a first creation for
a pocket-watch. Back then, it did not yet perform according to his expectations. It took fifteen years of work for the watchmaker to
gain the maturity and experience that is required to meet the standards of actual wrist wear and provide high performance chronometry.
Fifteen years, that allowed him to present, as a world premiere, the very first resonance wristwatch, pushing the limits of chronometry
where they had never gone before.
Each of the two balances alternately serves as exciter and resonator. When the two balances are in motion, they enter into
sympathy due to the resonance effect and begin beating in opposition naturally. The two balances thus rest against each other, giving
more inertia to the movement.
Nonetheless, this harmony is possible only if the difference in frequency between them doesn’t exceed five seconds per day
of accrued difference on six positions. Adjusting them is an extremely delicate task.
Whereas an external disturbing movement affects the running of a traditional mechanical watch, the same disturbance, with
a resonance watch, produces a spin that accelerates one of the balances as much as it slows the other down. Slowly, the two balances
work back towards each other to find their harmony position, thus eliminating the disturbance. This innovative chronometer offers
a level of precision that is unequalled in the field of mechanical watches.
What is the resonance phenomenon?
Two frequencies which get into harmony_
Research on resonance_

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Cro ns_
Winding :
Keep the crown at 2 o’clock on position 1, turn clockwise until it stops.
To guarantee the optimum resonance effect, it is recommended to wind the Chronomètre à Résonance before 28 hours of
running, moment when the amplitudes naturally decrease. The total power reserve of the Chronomètre à Résonance is 42
hours. In the classic configuration of Marine Chronometry, the power reserve hand indicates the number of running hours
since the last winding.
Setting the time :
Pull the crown at 2 o’clock out to position 2and turn clockwise to set the left dial and anti-clockwise to set the right dial.
The hands move forwards.
Reset both seconds to zero :
By pulling the crown at 4 o’clock (3), the seconds hands reset to 60 simultaneously.
Please note !
Push the crowns back to its initial position for the watch to work.
Operating instructions
Tourbillon Souverain
À la conquête de la précision_

Position 1
Winding
(3)
Resetting the seconds to zero
Position 2
Time setting
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Operating instructions

Remontoir d’égalité
Secondary geartrain
Remontoir d’égalité
Secondary geartrain
Barrel spring
Differential pinion
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The new Chronomètre à Résonance has only one single barrel spring to provide power for the two movements. A differential placed on
the first wheel, visible in the centre of the dial, transmits, independently, the energy of the barrel spring towards the two secondary gear
trains. Each secondary gear train is equipped with a remontoir d’égalité of a frequency of 1 second. Working in such a way, the force re-
ceived by the escapements remains linear and assures isochronism throughout 28 hours.
Characteristics
Moving to ards more precision, al ays!

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Functions and indicators
Seconds
Hours and minutes
Seconds
Hours and minutes
Power reserve indicator
Crown
Crown
18K Gold
Polished steel
Silver
The hour dial in solid Silver is maintained by a polished ring, screwed* on the 18 K Gold face
* Patented system

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Specifications
Movement_ Calibre 1520
Manual winding / 31 turns of crown
Movement in 18K rose Gold
Dimensions_ Overall diameter: 34.60 mm
Casing-up diameter: 34.20 mm
Overall height: 7.97 mm
Height of winding stem: 3.39 mm
Diameter of stem thread: S1.20 mm
Characteristics_ 2 Independent balances with 4 inertia weights
2 Flat micro-flamed Anachron balance springs
2 Mobile stud carriers
Free sprung
2 Springs laser pinned to Nivatronic collets
2 Pinned GE studs
Frequency: 21’600 v/h, 3Hz
Inertia: 10.10 mg*cm2
Angle of lift: 52°
Amplitude: 0 h dial up: > 260°
24 h dial up: > 260°
Main characteristics_ 2 Remontoirs d’Égalités
2-position winding crown at 2h
Manual winding in position 0
Time adjustment in position 2: clockwise for the left dial and
anti-clockwise for the right dial
Resetting the seconds to zero by pulling the crown at 4h

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Préface
Indications_ Double time display:
eft analog - indicating 24 hours
Right analog - indicating 12 hours
2 small seconds at 6h
Power reserve at 12h
Power Reserve_ 42 hours
Efficient running time: 28 hours ± 2
Finishing_ High quality
Partial circular graining on baseplate
Geneva waves on bridges
Screw heads polished and beveled, with chamfered slots
Pegs with polished rounded ends
Steel components hand-finished
Dial_ 18K white or 6N Gold and whitened Silver hour dials
with guilloché clous de Paris
Case_ Platinum or 18K 6N Gold
Diameter: 40 or 42 mm
Total height: 11 mm
Number of parts_ Movement: 378
Cased up with strap: 427
Jewels: 62

© Montres Journe SA_ Geneva
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Maintenance_
A maintenance cleaning is required every four years to preserve the precision of the watch.
Important_
Keep the original warranty card supplied with your wristwatch carefully. Your authorized F.P. JOURNE retailer will need this identity card for any
after-sales servicing. For all maintenance or repair, your wristwatch must be entrusted only to an appointed F.P. JOURNE agent.
Warranty_
Your F.P.Journe - Invenit et Fecit watch is covered by a warranty against any manufacturing flaws for a period of 2 years as of the date of purchase
appearing on the back of the warranty card or certificate. The warranty is valid only on presentation of the original card or certificate, duly filled out
by the authorised retailer (serial number, date of purchase, retailer’s stamp). The warranty does not cover normal wear or damage resulting from
abnormal use of the watch, accidents or alterations.
Warranty extension_
If your F.P.Journe - Invenit et Fecit watch was purchased at an F.P.Journe Boutique, your watch is automatically covered for a period of 3 years
as of the date of purchase appearing on the back of the warranty card or certificate. If your watch was purchased at an authorized retailer, we
kindly invite you to register on https://customerservice.fpjourne.com/en/guarantee during the 30 days following the initial date of purchase to
benefit from an additional year of warranty.