EP 2447387 B1 20131113 - 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)
[origin: EP2447387A1] 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.
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)
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
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