EP 2570871 B1 20140319 - Hairspring with two spiral springs
Title (en)
Hairspring with two spiral springs
Title (de)
Spirale mit zwei Spiralfedern
Title (fr)
Spiral à deux ressort-spiraux
Publication
Application
Priority
EP 11181307 A 20110914
Abstract (en)
[origin: EP2570871A1] The spring (37) has a hairspring (41) whose inner coil has a collet (40) arranged on a mounting structure (32). Another hairspring (43) is connected to the outer coil of the hairspring (41). An inner coil of the hairspring (43) has a device (47) for shifting the pinning point comprising a free end arranged to be secured to a balance spring stud in the plane of hairspring (43). The shifting device has a structure (42) connected to the inner coil through an u-shaped bend extending from the inner coil of the hairspring (43) to avoid providing elastic torque. An independent claim is included for movement structure.
IPC 8 full level
G04B 17/32 (2006.01)
CPC (source: EP US)
G04B 17/325 (2013.01 - EP US)
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 2570871 A1 20130320; EP 2570871 B1 20140319; CN 102998961 A 20130327; CN 102998961 B 20150610; HK 1183525 A1 20131227; JP 2013061340 A 20130404; JP 5486058 B2 20140507; RU 2012139263 A 20140320; US 2013064046 A1 20130314; US 8979359 B2 20150317
DOCDB simple family (application)
EP 11181307 A 20110914; CN 201210342803 A 20120914; HK 13110947 A 20130925; JP 2012202313 A 20120914; RU 2012139263 A 20120913; US 201213609858 A 20120911