Horology: time measuring systems or devices – Mechanical time base – Mainspring
Reexamination Certificate
2008-04-01
2008-04-01
Paumen, Gary F. (Department: 2833)
Horology: time measuring systems or devices
Mechanical time base
Mainspring
C368S163000, C368S127000
Reexamination Certificate
active
07350966
ABSTRACT:
The invention concerns a watch with a mechanical movement of the type comprising at least two regulating systems (SR1, SR2) each including a mechanical oscillator and an escapement. The movement includes as many sub-assemblies (SE1, SE2) as there are regulating systems, each of said sub-assemblies including a regulating system (SR1, SR2), a barrel (B1, B2) and a going train transmitting energy from the barrel to the regulating system inside the sub-assembly. A differential display gear (Da) connects the barrel or the going train of each sub-assembly to the display (A) to average out the rate of the two sub-assemblies. In a preferred embodiment, the two sub-assemblies are mounted on a common rotating support (5) and their regulating systems are tourbillons which make an orbital movement about the center of the watch dial.
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Search Report issued in corresponding Australian Patent Application No. SG 200601948-3, completed Jul. 12, 2006 and mailed Jul. 20, 2006.
European Search Report completed Feb. 10, 2006 in corresponding application No. EP 05 00 6849.
Griffin & Szipl, P.C.
Montres Breguet SA
Paumen Gary F.
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