EP 2447387 A1 20120502 - Barrel spring of a timepiece
Title (en)
Barrel spring of a timepiece
Title (de)
Schließzylinderfeder für eine Uhr
Title (fr)
Ressort de barillet de pièce d'horlogerie
Publication
Application
Priority
- CH 17992010 A 20101028
- CH 2632011 A 20110215
Abstract (en)
The spring barrel for a timepiece, is claimed. The spring is made of a metal alloy including nitrogen in a proportion of 0.75-1 wt.%, and iron. A ratio of an interior diameter of eye and a thickness of plate is less than 12. An independent claim is included for a timepiece.
Abstract (fr)
La présente invention concerne un ressort de barillet de pièce d'horlogerie caractérisé en ce qu'il est réalisé en un alliage métallique comportant de l'azote dans une proportion comprise entre 0.1% massique et la limite de sa solubilité dans l'alliage métallique, et du fer.
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/22 (2006.01); C22C 38/26 (2006.01); C22C 38/38 (2006.01); F16F 1/10 (2006.01); G04B 17/06 (2006.01); G04B 37/14 (2006.01)
CPC (source: EP)
C22C 38/001 (2013.01); C22C 38/22 (2013.01); C22C 38/38 (2013.01); G04B 1/145 (2013.01)
Citation (search report)
- [A] WO 2010055943 A1 20100520 - FOUDATION THE RES INST FOR ELE [JP], et al & EP 2351864 A1 20110803 - FOUNDATION THE RES INST OF ELECTRIC AND MAGNETIC MATERIALS [JP], et al
- [A] CH 551492 A 19740715 - STRAUMANN REINHARD INST DR ING
- [A] JP 2004308827 A 20041104 - SII MICRO PARTS LTD
- [A] EP 0945717 A1 19990929 - METTLER TOLEDO GMBH [CH]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2447387 A1 20120502; EP 2447387 B1 20131113; HK 1166357 A1 20121026
DOCDB simple family (application)
EP 11186578 A 20111025; HK 12107032 A 20120718