EP3002638A3 - Method for manufacturing a thermocompensated hairspring - Google Patents

Method for manufacturing a thermocompensated hairspring Download PDF

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Publication number
EP3002638A3
EP3002638A3 EP15183042.9A EP15183042A EP3002638A3 EP 3002638 A3 EP3002638 A3 EP 3002638A3 EP 15183042 A EP15183042 A EP 15183042A EP 3002638 A3 EP3002638 A3 EP 3002638A3
Authority
EP
European Patent Office
Prior art keywords
coating
manufacturing
temperature
thermoelastic coefficient
thermocompensated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15183042.9A
Other languages
German (de)
French (fr)
Other versions
EP3002638A2 (en
EP3002638B1 (en
Inventor
Jean-Charles Fiaccabrino
Gideon Levingston
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Richemont International SA
Carbontime Ltd
Original Assignee
Richemont International SA
Carbontime Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Richemont International SA, Carbontime Ltd filed Critical Richemont International SA
Publication of EP3002638A2 publication Critical patent/EP3002638A2/en
Publication of EP3002638A3 publication Critical patent/EP3002638A3/en
Application granted granted Critical
Publication of EP3002638B1 publication Critical patent/EP3002638B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/066—Manufacture of the spiral spring

Abstract

Procédé de fabrication d'un oscillateur mécanique (1) destiné à équiper un résonateur mécanique d'un mouvement d'horlogerie, un senseur MEMS ou un autre instrument de précision; l'oscillateur (1) comprenant une âme (2) fabriquée dans un matériau ayant un premier coefficient thermoélastique (β1) et un revêtement périphérique (4) en un oxyde présentant un second coefficient thermoélastique (β2); le procédé comprenant la déposition du revêtement (4) à une température qui reste inférieure ou égale à 500°C, et un traitement thermique de recuit du revêtement (4) à une température d'au moins 550°C, afin d'ajuster le second coefficient thermoélastique (β2) du revêtement (4) pour que ce dernier compense l'effet de la variation du premier coefficient thermoélastique (β1) de l'âme avec la température.

Figure imgaf001
A method of manufacturing a mechanical oscillator (1) for equipping a mechanical resonator with a watch movement, a MEMS sensor or other precision instrument; the oscillator (1) comprising a core (2) made of a material having a first thermoelastic coefficient (β1) and a peripheral coating (4) of an oxide having a second thermoelastic coefficient (β 2 ); the method comprising depositing the coating (4) at a temperature which remains at or below 500 ° C, and heat treating annealing the coating (4) at a temperature of at least 550 ° C, to adjust the second thermoelastic coefficient (β 2 ) of the coating (4) so that the latter compensates for the effect of the variation of the first thermoelastic coefficient (β 1 ) of the core with the temperature.
Figure imgaf001
EP15183042.9A 2014-09-08 2015-08-28 Method for manufacturing a thermocompensated hairspring Active EP3002638B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH13492014 2014-09-08

Publications (3)

Publication Number Publication Date
EP3002638A2 EP3002638A2 (en) 2016-04-06
EP3002638A3 true EP3002638A3 (en) 2016-07-13
EP3002638B1 EP3002638B1 (en) 2021-08-18

Family

ID=51535297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15183042.9A Active EP3002638B1 (en) 2014-09-08 2015-08-28 Method for manufacturing a thermocompensated hairspring

Country Status (1)

Country Link
EP (1) EP3002638B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3456859A1 (en) 2017-09-13 2019-03-20 Rolex Sa Protective coating for a complex watch component
EP3502288B1 (en) 2017-12-21 2020-10-14 Nivarox-FAR S.A. Method for manufacturing a hairspring for clock movement
EP3502785B1 (en) 2017-12-21 2020-08-12 Nivarox-FAR S.A. Hairspring for clock movement and method for manufacturing same
EP3608728B1 (en) * 2018-08-08 2022-02-16 Nivarox-FAR S.A. Coloured thermocompensated spring and method for manufacturing same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH699780A2 (en) * 2008-10-22 2010-04-30 Richemont Int Sa Self-compensating balance spring for mechanical spiral balance-wheel oscillator of e.g. timepiece, has silicon bar with exterior surface, and material in form of cover, where cover partially covers exterior surface
WO2014006229A1 (en) * 2012-07-06 2014-01-09 Rolex Sa Method for treating a surface of a timepiece component, and timepiece component obtained from such a method
CH707225A2 (en) * 2012-11-16 2014-05-30 Nivarox Sa Spiral compensator for thermically compensated spiral-beam resonator for clock element, has core that is formed from non-metal material, where core is entirely covered with moisture stable layer that is provided with specific thickness

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06117470A (en) 1992-10-07 1994-04-26 Yokogawa Electric Corp Spiral spring and electric indicating instrument
DE10127733B4 (en) 2001-06-07 2005-12-08 Silicium Energiesysteme E.K. Dr. Nikolaus Holm Screw or spiral spring elements of crystalline, in particular monocrystalline silicon
EP1422436B1 (en) 2002-11-25 2005-10-26 CSEM Centre Suisse d'Electronique et de Microtechnique SA Spiral watch spring and its method of production
EP2395661A1 (en) 2010-06-10 2011-12-14 The Swatch Group Research and Development Ltd. Resonator with temperature compensation of thermal coefficients of first and second order
EP2590325A1 (en) 2011-11-04 2013-05-08 The Swatch Group Research and Development Ltd. Thermally compensated ceramic resonator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH699780A2 (en) * 2008-10-22 2010-04-30 Richemont Int Sa Self-compensating balance spring for mechanical spiral balance-wheel oscillator of e.g. timepiece, has silicon bar with exterior surface, and material in form of cover, where cover partially covers exterior surface
WO2014006229A1 (en) * 2012-07-06 2014-01-09 Rolex Sa Method for treating a surface of a timepiece component, and timepiece component obtained from such a method
CH707225A2 (en) * 2012-11-16 2014-05-30 Nivarox Sa Spiral compensator for thermically compensated spiral-beam resonator for clock element, has core that is formed from non-metal material, where core is entirely covered with moisture stable layer that is provided with specific thickness

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CAO ZHIQIANG ET AL: "Density change and viscous flow during structural relaxation of plasma-enhanced chemical-vapor-deposited silicon oxide films", JOURNAL OF APPLIED PHYSICS, AMERICAN INSTITUTE OF PHYSICS, US, vol. 96, no. 8, 1 January 2004 (2004-01-01), pages 4273 - 4280, XP012069069, ISSN: 0021-8979, DOI: 10.1063/1.1787910 *

Also Published As

Publication number Publication date
EP3002638A2 (en) 2016-04-06
EP3002638B1 (en) 2021-08-18

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