Global Patent Index - EP 3252542 A1

EP 3252542 A1 20171206 - PART FOR FASTENING A TIMEPIECE HAIRSPRING

Title (en)

PART FOR FASTENING A TIMEPIECE HAIRSPRING

Title (de)

TEIL ZUR BEFESTIGUNG EINER UNRUHSPIRALE

Title (fr)

PIÈCE DE FIXATION D'UN RESSORT-SPIRAL HORLOGER

Publication

EP 3252542 A1 20171206 (FR)

Application

EP 16172445 A 20160601

Priority

EP 16172445 A 20160601

Abstract (en)

[origin: US2017351216A1] An assembly (300) includes (i) a hairspring (2) made of a paramagnetic alloy including at least one of the following elements: Nb, V, Ta, Ti, Zr and Hf, notably an alloy including the elements Nb and Zr with between 5% and 25% by mass of Zr and an interstitial doping agent including oxygen, and (ii) at least one fastening part (1; 1′), notably two parts (1; 1′), in particular a stud (1) or a collet (1′), for an end (2a; 2b) of the hairspring (2), the at least one part (1; 1′) having a first portion (10; 10′) that is designed to come into contact with the hairspring (2) and that is made of titanium or titanium alloy or of tantalum or tantalum alloy, notably grade 2 titanium or grade 5 titanium.

Abstract (fr)

Pièce (1) de fixation d'une extrémité (2a) d'un ressort-spiral en alliage paramagnétique comprenant au moins l'un des éléments suivants Nb, V, Ta, Ti, Zr et Hf, la pièce comprenant une première portion (10) destinée à venir en contact avec le ressort-spiral et réalisée en titane ou en alliage de titane ou en tantale ou en alliage de tantale, notamment en titane grade 2 ou en titane grade 5.

IPC 8 full level

G04B 17/34 (2006.01); G04B 17/32 (2006.01)

CPC (source: CN EP US)

G04B 17/063 (2013.01 - US); G04B 17/066 (2013.01 - CN US); G04B 17/325 (2013.01 - CN EP US); G04B 17/34 (2013.01 - CN US); G04B 17/345 (2013.01 - EP US)

Citation (applicant)

Citation (search report)

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 3252542 A1 20171206; CN 107450297 A 20171208; JP 2018036249 A 20180308; US 10409223 B2 20190910; US 2017351216 A1 20171207; US 2019369561 A1 20191205

DOCDB simple family (application)

EP 16172445 A 20160601; CN 201710406109 A 20170601; JP 2017103454 A 20170525; US 201715609749 A 20170531; US 201916519735 A 20190723