System for securing a balance spring

Patent metadata

Field	Value
Publication number	US-2016154379-A1
Application number	US-201514952414-A
Country	US
Kind code	A1
Filing date	Nov 25, 2015
Priority date	Nov 27, 2014
Publication date	Jun 2, 2016
Grant date	—

Abstract

A balance spring system of a horology movement, comprising:
a balance spring ( 1 ); a movement blank; a first element ( 1 c ) for indexing the position of an outer end ( 10 ) of the balance spring relative to the blank; and a unit (OL) for connection of the outer end ( 10 ) of the balance spring to the movement blank,

the first indexing element ( 1 c ) being designed such as to be displaceable relative to the connection unit (OL).

First claim

1 . A balance spring system of a horology movement, comprising:
a balance spring; a movement blank; a first element for indexing the position, in particular the angular position, of an outer end ( 10 ) of the balance spring relative to the blank; and a unit for connection of the outer end of the balance spring to the movement blank, the first indexing element being designed such as to be displaceable relative to the connection unit.

2 . The system as claimed in claim 1 , wherein the connection unit is at a median plane of the balance spring, wherein the connection unit is between a first plane (P 1 ) and a second plane (P 2 ), the first plane and the second plane being symmetrical relative to the median plane (P), and spaced by a distance (d) which is smaller than 1.2 mm.

3 . The system as claimed in claim 1 , wherein the first indexing element comprises a shaft which is fitted on the connection unit, the connection unit being designed to cooperate with a bore provided in the blank.

4 . The system as claimed in claim 1 , comprising a first element for immobilization of the connection unit relative to the first indexing element.

5 . The system as claimed in claim 1 , comprising a first element for guiding of the first indexing element.

6 . The system as claimed in claim 1 , comprising a first element for adjustment of the position of the outer end of the balance spring relative to the blank.

7 . The system as claimed in claim 6 , wherein a friction element is designed to cooperate directly or indirectly with the second adjustment element, so as to create friction torque which opposes the rotation of the second adjustment element.

8 . The system as claimed in claim 1 , comprising a third element for guiding of the system in rotation relative to the blank.

9 . The system as claimed in claim 1 , comprising a second element for immobilization of the connection unit relative to the blank or of an outer end of the balance spring relative to the blank.

10 . The system as claimed in claim 1 , comprising a first adjusting-mark for a position of an outer end of the balance spring relative to the blank.

11 . The system as claimed in claim 1 , wherein the blank is a plate.

12 . The system as claimed in claim 1 , wherein the connection unit is produced integrally with an outer end of the balance spring or is in a single piece with the balance spring.

13 . The system as claimed in claim 1 , wherein the connection unit comprises a first body and a second body produced integrally with the outer end of the balance spring or in a single piece with the balance spring, the first body being permanently secured on the second body.

14 . The system as claimed in claim 13 , wherein an interface between the first body and the second body is at a median plane of the balance spring, wherein the interface between the first body and the second body is between a first plane and a second plane, the first plane and the second plane being symmetrical relative to the median plane, and spaced by a distance (d) which is smaller than 1.2 mm.

15 . A horology movement comprising a balance spring system as claimed in claim 1 .

16 . The horology movement as claimed in claim 15 , wherein the movement comprises a movement blank and a balance, the balance spring system being placed between the balance and the movement blank.

17 . A horology piece comprising a movement as claimed in claim 15 .

18 . A method for putting a horology movement as claimed in claim 15 into beat, wherein the method comprises:
releasing the first indexing element relative to the connection unit;
displacing the connection unit; and
securing the position of the first indexing element relative to the connection unit.

19 . The system as claimed in claim 1 , wherein the first indexing element ( 1 c ) is designed to cooperate with a second indexing element ( 3 c ) provided on the blank ( 3 ), and to be displaceable in rotation relative to the connection unit.

20 . The system as claimed in claim 2 , wherein the first plane and the second plane are spaced by a distance (d) which is smaller than 0.8 mm.

Assignees

• Rolex Sa

Inventors

• Bertrand Jean-Louis
• Billet Pascal

Classifications

• G04B17/063 Primary

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

• G04B17/325 Primary

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

• G04B18/02

  Regulator {or adjustment} devices; Indexing devices {, e.g. raquettes} · CPC title

• G04B18/06 Primary

  by setting the collet or the stud of a hairspring · CPC title

• G04B17/066

  Manufacture of the spiral spring (locking of the spiral spring by the regulating lever G04B18/026; spiral spring with temperature compensation G04B17/227; fixation of the spiral spring on the collet G04B17/32; mainspring G04B1/14) · CPC title