EP 1605323 A2 20051214 - Spiral spring for mechanical clockwork
Title (en)
Spiral spring for mechanical clockwork
Title (de)
Spiralfeder für mechanisches Uhrwerk
Title (fr)
Spiral pour mouvement d'horlogerie mécanique
Publication
Application
Priority
CH 6522004 A 20040413
Abstract (en)
The hairspring has a peripheral exterior curve (10) situated in a plane of the hairspring and has a specific rigidity, such that a central part (14) of a curve-hairspring assembly is constituted of concentric displacements during its oscillation. The curve presents elbows (16-18) for centering a central part of the assembly during the assembly operation in a watch movement.
Abstract (fr)
Spiral pour mouvement d'horlogerie mécanique muni d'une courbe extérieure périphérique située dans le plan du spiral. La rigidité de cette courbe est telle que la partie centrale de l'ensemble spiral-courbe ainsi constitué se développe concentriquement lors de ses oscillations.
IPC 1-7
IPC 8 full level
G04B 17/06 (2006.01)
CPC (source: EP)
G04B 17/066 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 05405216 A 20050301