Timepiece assortment using an amorphous metal alloy

Patent metadata

Field	Value
Publication number	US-9709954-B2
Application number	US-201514669127-A
Country	US
Kind code	B2
Filing date	Mar 26, 2015
Priority date	Apr 7, 2014
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

The invention relates to a timepiece assortment including a timepiece component fixed to an arbor with the aid of a fixing element. According to the invention, the fixing element is made of at least partially amorphous metal alloy, is secured to the timepiece component by partial insertion and includes a hole into which the arbor is driven.

First claim

What is claimed is:

1. A method of assembling a timepiece assortment comprising the following steps:
a) separately manufacturing a timepiece component and a fixing element, the fixing element being manufactured from an at least partially amorphous metal alloy;
b) partially inserting at least one portion of the timepiece component into the thickness of the fixing element heated to between its vitreous transition temperature and its crystallisation temperature in order to form a timepiece component fixing element assembly;
c) driving an arbor into a hole of the fixing element to form the timepiece assortment so as to leave a gap between timepiece component and the arbor.

2. The method according to claim 1 , wherein the hole is formed in step a), in step b) or in step c).

3. The method according to claim 1 , wherein between step b) and step c), the method also includes the following step:
d) maintaining the timepiece component fixing element assembly above the vitreous transition temperature of the fixing element to make the fixing element more ductile.

4. The method according to claim 1 , wherein step c) also comprises the following phases:
c1) heating the arbor to above the vitreous transition temperature of the fixing element;
c2) driving the arbor into the hole of the fixing element to raise the temperature of the contact surface of the fixing element above the vitreous transition temperature in order to locally soften the fixing element and decrease the stresses on the material of the timepiece component while maintaining good adherence.

5. The method according to claim 1 , wherein the timepiece component is pressed against a shoulder of the arbor in the driving-in step c).

6. The method according to claim 1 , wherein the fixing element is pressed against a shoulder of the arbor in the driving-in step c).

7. The method according to claim 1 , wherein the timepiece component includes at least one recess for increasing the contact surface with the fixing element.

8. The method according to claim 1 , wherein a template is used in step b) in order to guarantee the geometry of the fixing element.

9. The method according to claim 1 , wherein a spacer is used in step b) to guarantee the depth of penetration of the timepiece component into the thickness of the fixing element.

10. A method of assembling a timepiece assortment comprising the following steps:
a′) separately manufacturing a timepiece component, a fixing element made of an at least partially amorphous metal alloy and a driving-in member provided with a hole;
b′) partially inserting at least one portion of the timepiece component and of the driving-in member into the thickness of the fixing element heated to between its vitreous transition temperature and its crystallisation temperature to form a timepiece component fixing element driving-in member assembly;
c′) driving an arbor into the hole in the driving-in member to form the timepiece assortment so as to leave a gap between timepiece component and the arbor.

11. The method according to claim 10 , wherein the timepiece component is pressed against a shoulder of the arbor in the driving-in step c′).

12. The method according to claim 10 , wherein the driving-in member is pressed against a shoulder of the arbor in the driving-in step c′).

13. The method according to claim 10 , wherein the timepiece component includes at least one recess for increasing the contact surface with the fixing element.

14. The method according to claim 10 , wherein the driving-in member includes at least one recess for increasing the contact surface with the fixing element.

15. The method according to claim 10 , wherein a template is used in step b′) to guarantee the geometry of the fixing element.

16. The method according to claim 10 , wherein a spacer is used in step b′) to guarantee the depth of penetration of the timepiece component and of the driving-in member into the thickness of the fixing element.

Assignees

• Nivarox Far Sa

Inventors

• Dubois Philippe
• Winkler Yves
• Mallet Daniel
• Charbon Christian

Classifications

• G04B13/022 Primary

  with parts made of hard material, e.g. silicon, diamond, sapphire, quartz and the like · CPC title

• G04B13/026 Primary

  Physics · mapped topic

• Y10T29/49581

  having arbor, pinion, or balance · CPC title

• G04B17/32

  Component parts or constructional details, e.g. collet, stud {, virole or piton} · CPC title

• G04B17/063

  Balance construction (balances with frequency adjustment screw G04B18/006; balances with temperature compensation G04B17/222; balancing devices G04B17/28) · CPC title