EP 4278234 A1 20231122 - METHOD FOR TESTING AND MANUFACTURING SPIRAL SPRINGS FOR A TIMEPIECE
Title (en)
METHOD FOR TESTING AND MANUFACTURING SPIRAL SPRINGS FOR A TIMEPIECE
Title (de)
VERFAHREN ZUM TESTEN UND HERSTELLEN VON SPIRALFEDERN FÜR UHR
Title (fr)
PROCÉDÉ DE CONTROLE ET DE FABRICATION DE RESSORTS SPIRAUX D'HORLOGERIE
Publication
Application
Priority
- EP 21152144 A 20210118
- EP 2022050760 W 20220114
Abstract (en)
[origin: WO2022152857A1] Method for testing a spiral spring or a spiral spring blank arranged to form a spiral spring, the spiral spring being required to have at least one predetermined resonance frequency, the testing method comprising the following steps: a. applying, to the spiral spring or the spiral spring blank, a vibratory excitation that varies over time to cover a predetermined frequency range, b. identifying at least one characteristic of a resonance frequency, such as a resonance peak, of the spiral spring or the spiral spring blank upon vibratory excitation over the predetermined frequency range, c. subjecting the resonance frequency characteristic identified in step b to a prediction machine to determine the stiffness of the spiral spring or the spiral spring blank and/or to determine whether dimensional correction of the spiral spring or the spiral spring blank is required to obtain the predetermined resonance frequency.
IPC 8 full level
CPC (source: EP US)
G04D 7/10 (2013.01 - EP US); G04D 7/125 (2013.01 - EP US); G04D 7/1285 (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
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4030243 A1 20220720; CN 116783558 A 20230919; EP 4278234 A1 20231122; JP 2024507061 A 20240216; US 2024069496 A1 20240229; WO 2022152857 A1 20220721
DOCDB simple family (application)
EP 21152144 A 20210118; CN 202280010309 A 20220114; EP 2022050760 W 20220114; EP 22700645 A 20220114; JP 2023542990 A 20220114; US 202218261472 A 20220114