F.P.Journe Centigraphe Sport

F.P.Journe launched the first mechanical chronograph of high horology entirely in aluminum

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Published by 3809 on March 19th, 2012 at 04:23 p.m..
  • Summary


François-Paul Journe, constructor and master watchmaker in permanent quest for precision and innovative horological mechanic discloses a new time measurement - sportive and exclusive. F.P.Journe is launching the first mechanical chronograph of high horology on a wrist watch entirely in aluminum: case, bracelet and movement.

The hand-wound mechanical movement of the Centigraphe indicates elapsed times from a 100th of a second to 10 minutes, visible on 3 dials, each with a time scale in red.

The indications The 100th of a second hand revolves around the dial in one second on a scale marked in hundredths of a second. On the dial at 2 o’clock, the hand revolves once every 20 seconds on a time scale divided into seconds.

The third dial, at 6 o’clock is graduated for 10 minutes. Patented ergonomic chronograph The chronograph is started, stopped and zeroed by a rocker at 2 o’clock in the case band, instead of the usual buttons on either side of the crown. This ergonomic design, perfectly fitted to the wristwatch, is patented.

Patented chronograph mechanism A second patent was granted for the mechanism’s ingenious configuration, which effectively isolates the chronograph from the timekeeping function.

This means the balance amplitude is unaffected when the chronograph is running. The hands of the 100th of a second counter, the 20 seconds, and the 10 minutes hand are driven by 2 different wheel trains, themselves driven by the center of the mainspring (patented).

Another separate train of wheels, also driven by the barrel arbor, drives the 10-minutes hand. 1/100th second recorder hand The 100th of a second’s hand, released by the watch's escapement, makes one revolution of the dial per second.

A wheel mounted on the escape wheel (4th wheel of the going train) releases the arbor to which the hand is fitted.

The seconds are driven by the going train from the barrel, and by the energy of the chronograph train, as transmitted by the barrel arbor.

One ingenious feature of the 100th of a second is that it may be stopped anywhere along its one-second journey around its dial, even between two 100th-second divisions, enabling a fractional reading.

This is achieved by vertically disengaging the pinion of the 100th of a second hand from that of the escapement, which presses on the pivot shank and acts as a brake. Return to zero The 20-seconds hand and the 10-minutes hand arbors are zeroed by hammer levers acting on snail cams.

The 100th of a second hand is stopped at zero by a beak protruding from its pinion, which presses on a lever and thus blocks the chronograph train. Maintaining power and power reserve The barrel features a maintaining power system in order to ensure that the driving force does not decrease during winding.

The mainspring supplies at least 100 hours of power reserve without the chronograph, and 24 hours with the chronograph running.

CENTIGRAPHE Sport - Technical Specifications
Movement Calibre 1506
Manual winding
Movement in aluminium alloy
Dimensions of the Movement Overall diameter: 34.40mm
Casing-up diameter: 34.00mm
Overall height: 5.60mm
Height of hands: 1.45mm
Height of winding stem: 2.69mm
Diameter of stem thread: S1.20mm
Balance Free-sprung balance
Four adjustable inertia weights
Anachron free sprung balance spring
Mobile stud holders
Pinned GE stud
Spring pinned to the collet
Frequency: 21,600v/h (3Hz)
Inertia: 10.10 mg/cm2
Angle of lift: 52°
Amplitude: 0h dial up: > 320°
24h dial up: > 280°
Escapement In-line lever escapement - 15-tooth escape wheel
Indications Central hours and minutes
One-second chronograph: hand at 10 o’clock
20-seconds chronograph: hand at 2 o’clock
10-minutes chronograph: hand at 6 o’clock
Chronograph Separate chronograph train driven by directly from the mainspring
1/100th second readout
Power Reserve 100 hours with the chronograph stopped
24 hours with the chronograph running
Finishes Circular stripes on the bridges
Circular graining on the baseplate
Polished screw heads with chamfered slots
Pegs with polished rounded ends
Straight-grained steel work
Case Aluminium alloy with rubber inserts
Diameter: 42.00mm
Total height: 11.60mm
Dial Aluminium alloy and transparent sapphire
Crown Titanium with rubber coating
Bracelet Aluminium alloy with rubber inserts
Deployant Clasp Aluminium with rubber coating, adjustable
Control Rocker arm to start, stop and zero the chronograph
3 position winding crown
Position 0, disengaged
Position 1, winding
Position 2, time-setting
Number of Parts Movement without dial 284
Cased up with strap 324
Jewels 50
Rubber 72
Weight Total weight: 55 g
Movement alone 12 g
Sapphire glass 7 g

Price on request only

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