Balance spring stud-holder

Patent metadata

Field	Value
Publication number	US-9411313-B2
Application number	US-201514945900-A
Country	US
Kind code	B2
Filing date	Nov 19, 2015
Priority date	Dec 11, 2014
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

The present invention concerns an assembly for holding or supporting a timepiece balance spring including a balance spring stud and a stud-holder, wherein said stud-holder includes:
a base ( 30, 300 ) comprising a first stop member ( 32, 320 ) extending along a longitudinal axis (L) of said base; means ( 7 ) of attaching said stud-holder to a balance-cock ( 5 ), characterized in that said stud-holder further includes elastic means ( 34, 340 ) provided with a second stop member ( 36, 360 ).

First claim

What is claimed is:

1. An assembly for holding or supporting a timepiece balance spring, including a balance spring stud and a stud-holder, wherein the stud-holder includes:
a base comprising a first stop member extending along a longitudinal axis of said base;
means of attaching said stud-holder to a balance-cock,
wherein said stud-holder further includes elastic means provided with a second stop member, the elastic means extending along said longitudinal axis of said base such that the second stop member is located facing the first stop member, the space between said first stop member and said second stop member forming a housing for said stud, and in that the elastic means are made to naturally exert stress on the stud when the latter is placed in the housing, the housing being capable of enlargement to release the stud by deformation of said elastic means, said elastic means including two arms extending from said base, the arms being joined to each other and having a convex shape such that the application of a stress to the two arms intended to move them closer together causes a displacement of the second stop member intended to enlarge the housing.

2. The holding assembly according to claim 1 , wherein the two arms forming the elastic means are symmetrical with respect to the longitudinal axis of said base.

3. The holding assembly according to claim 1 , wherein each of the two arms includes a notch.

4. The holding assembly according to claim 1 , wherein the stud-holder is made of a plastic material.

5. The holding assembly according to claim 1 , wherein the stud-holder is made of a metallic material.

6. The holding assembly according to claim 1 , wherein the stud-holder is made of a single crystal material.

7. The holding assembly according to claim 1 , wherein the means of attachment include a hole arranged in the balance-cock cooperating with a first hole of the stud-holder and a screw inserted in both holes.

8. The holding assembly according to claim 7 , wherein the means of attachment further comprise a lug arranged on the balance-cock and a second hole arranged in the stud-holder, said lug cooperating with the second hole.

9. The holding assembly according to claim 7 , wherein the means of attachment further comprise a lug arranged on the stud-holder and a second hole arranged in the balance-cock, said lug cooperating with the second hole.

10. The holding assembly according to claim 7 , wherein the means of attachment further comprise a protuberance arranged on the balance-cock and a recess arranged in the stud-holder, said recess cooperating with said protuberance.

11. The holding assembly according to claim 10 , wherein said protuberance and said recess have the same dimensions.

12. The holding assembly according to claim 8 , wherein the second hole has the shape of an arc of a circle, said second hole extending at a greater angle than said lug allowing the stud-holder to pivot angularly.

13. The holding assembly according to claim 9 , wherein the second hole has the shape of an arc of a circle, said second hole extending at a greater angle than said lug allowing the stud-holder to pivot angularly.

14. The holding assembly according to claim 10 , wherein the first hole has the shape of an arc of a circle, said recess extending at a greater angle than said protuberance allowing the stud-holder to pivot angularly.

15. The holding assembly according to claim 1 , wherein the stud-holder and the balance-cock are in one-piece.

Assignees

• Eta Sa Mft Horlogere Suisse

Inventors

• Christan Julien
• Kaelin Laurent
• Wyssbrod Baptist

Classifications

• G04B17/325 Primary

  for fastening the hairspring in a fixed position, e.g. using a block · CPC title

• G04B17/34 Primary

  for fastening the hairspring onto the balance · CPC title