Here 'tis, at least the Derwent abstract thereof:
Watch movement for large curved watches uses pulley drive of inclined
barrels with oscillating mass winding
Patent Assignee: TAG HEUER SA (TAGH-N)
Inventor: RUCHONNET J
Number of Countries: 105 Number of Patents: 001
Patent Family:
Patent No Kind Date Applicat No Kind Date Week
WO 200406026 A2 20040115 WO 2003EP50301 A 20030709 200411 B
Priority Applications (No Type Date): CH 20021188 A 20020709
Patent Details:
Patent No Kind Lan Pg Main IPC Filing Notes
WO 200406026 A2 F 25 G04B-001/00
Designated States (National): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA
CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN
IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO
NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US
UZ VC VN YU ZA ZM ZW
Designated States (Regional): AT BE BG CH CY CZ DE DK EA EE ES FI FR GB
GH GM GR HU IE IT KE LS LU MC MW MZ NL OA PT RO SD SE SI SK SL SZ TR TZ
UG ZM ZW
Abstract (Basic): WO 200406026 A2
NOVELTY - A watch movement has tensioned (30, 32) belt (20, 21)
transmission between ball bearing mounted pulleys (150, 160, 170, 180)
of the energy from several inclined barrels (15, 16, 17, 18) joined by
a torque divider and charged by a mass (14) oscillating linearly
between sprung stops.
DETAILED DESCRIPTION - A watch movement has tensioned (30, 32) belt
(20, 21) transmission between ball bearing mounted pulleys (150, 160,
170, 180) of the energy from several inclined barrels (15, 16, 17, 18)
joined by a torque divider (40) and charged by a mass (14) oscillating
linearly between sprung stops. Includes INDEPENDENT CLAIMs for the use
of toothed belts and for the manufacture of the belts by moulding
synthetic material on a metal substrate and for partial visibility of
the belts through the watch face. Includes an INDEPENDENT CLAIM for a
regulator that can be set before insertion in the watch.
USE - Watch movement for large watches with non planar shape.
ADVANTAGE - The use of pulleys avoids some disadvantages of gears
including the ability to have inclined barrel axes without expensive
conical gears and so use watches that do not have flat parallel faces.
The inclined barrels allow a curved shape which can be useful for large
watches. Avoids the need to set shaft axes relative to each other with
great precision. Does not require lubrication or metal gear teeth. Can
transmit movement across the mechanism without intermediate gears.
DESCRIPTION OF DRAWING(S) - The drawing is a perspective view of
the mechanism.
Linearly oscillating mass (14)
Inclined barrels (15, 16, 17, 18)
Belts (20, 21)
Eccentric tensioners (30, 32)
Pulleys (150, 160, 170, 180)
pp; 25 DwgNo 2/7
International Patent Class (Main): G04B-001/00
International Patent Class (Additional): G04B-019/04
Sorry that the drawing won't come out. As usual, they always get these things wrong, it's not patented, but the subject of a patent application, in this case an International application under the PCT, publication number WO 04/06026. The language is French.
Interesting - every mechanical automatic watch has used a rotor selfwinder since Rolex devised the principle (the "Perpetual" mechanism) in the 1930s. The problem clearly is that you can't use a rotor so effectively in a curved watch. Moreover, the various shaft axes in a curved watch (especially a big one) would not be parallel, and only some very expensive engineering would allow the use of a conventional rotor mechanism.
This watch uses a sliding weight, which, on the face of it (sorry!) wouldn't seem to be as efficient an energy storage mechanism as a rotor, in that there would be positions in which it wouldn't slide, whereas a rotor will always rotate. However, I'm sure that TAG has done its homework, otherwise it wouldn't be releasing it.
For that money, I'd still go for a Jaeger-LeCoultre Master Compressor Geographic...
http://www.orolus.com/jaeger_le_coultre_master.shtml