EP 2703909 A1 20140305 - Paired balance wheel - hairspring resonator
Title (en)
Paired balance wheel - hairspring resonator
Title (de)
Gepaarter Spiralunruh-Schwinger
Title (fr)
Résonateur balancier - spiral appairé
Publication
Application
Priority
EP 12182973 A 20120904
Abstract (en)
The resonator (1) has a balance spring (5) formed in a single crystal quartz with three crystallographic axes, where the first and second axes are electrical axis and mechanical axis, respectively. The thermal expansion coefficient of a balance (3) lies between + 6 part per million degree Celsius -1 and + 9.9 part per million degree Celsius -1. Cut angle ranging between - 5 degree and + 5 degree is formed between the balance spring and the third axis of the single crystal quartz such that the resonator is less sensitive to temperature variation. A portion of the balance is made of titanium, platinum or durimphy.
Abstract (fr)
L'invention se rapporte à un résonateur (1) comportant un spiral (5) formé dans un cristal de quartz monocristallin d'axes cristallographiques x, y, z, l'axe x, étant l'axe électrique et l'axe y l'axe mécanique, et coopérant avec un balancier (3). Selon l'invention, le coefficient de dilatation ( ± b ) du balancier (3) est compris entre +6 ppm.°C -1 et +12 ppm.°C -1 et l'angle (¸) de coupe du spiral (5) par rapport à l'axe z dudit cristal de quartz monocristallin est compris entre -5° et +5° afin d'appairer le balancier (3) avec le spiral (5). L'invention concerne le domaine des pièces d'horlogerie.
IPC 8 full level
G04B 17/06 (2006.01)
CPC (source: CH EP RU US)
G04B 17/063 (2013.01 - EP US); G04B 17/066 (2013.01 - EP US); G04B 17/20 (2013.01 - CH); G04C 3/04 (2013.01 - US); G04B 17/22 (2013.01 - RU)
Citation (applicant)
EP 1519250 A1 20050330 - ASULAB SA [CH]
Citation (search report)
- [ID] EP 1519250 A1 20050330 - ASULAB SA [CH]
- [I] EP 1605182 A1 20051214 - SUISSE ELECTRONIQUE MICROTECH [CH]
- [A] WO 2008080570 A2 20080710 - COMPLITIME S A [CH], et al
- [A] EP 2395661 A1 20111214 - SWATCH GROUP RES & DEV LTD [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 2703909 A1 20140305; CN 103676600 A 20140326; CN 103676600 B 20160907; EP 2703910 A2 20140305; EP 2703910 A3 20140514; EP 2703910 B1 20190508; JP 2014052374 A 20140320; JP 6328392 B2 20180523; RU 2013140777 A 20150310; RU 2643195 C2 20180131; US 2014064044 A1 20140306; US 9030920 B2 20150512
DOCDB simple family (application)
EP 12182973 A 20120904; CN 201310397316 A 20130904; EP 13179958 A 20130809; JP 2013182787 A 20130904; RU 2013140777 A 20130903; US 201314011892 A 20130828