Barrel shaft for a clock movement, barrel spring, and barrel including such a spring and/or such a shaft

Patent metadata

Field	Value
Publication number	US-2016349703-A1
Application number	US-201615231303-A
Country	US
Kind code	A1
Filing date	Aug 8, 2016
Priority date	Apr 4, 2012
Publication date	Dec 1, 2016
Grant date	—

Abstract

The invention relates to a barrel spring ( 2 ) including: an inner end ( 5 ) and an outer end; a first portion ( 50 ) having a first height (H); a second portion ( 52 ) having a second height (h) that is smaller than the first height (H) and being located near the inner end ( 5 ); and, at the second portion, e.g. at the inner end, a first attachment element ( 51 ) suitable for being attached to the barrel shaft, wherein the second portion is to be inserted into a circumferentially extending groove provided on the barrel shaft.

First claim

1 - 5 . (canceled)

6 . A shaft for a clock movement barrel, comprising:
a groove extending round a circumference of the shaft and adapted to receive a barrel spring, wherein the groove is staggered in an axial direction of the shaft.

7 . (canceled)

8 . The barrel shaft as claimed in claim 6 , wherein the groove has a height comparable to a height of a part of the barrel spring.

9 . The barrel shaft as claimed in claim 6 , wherein the groove extends partly round the shaft.

10 . The barrel shaft as claimed in claim 6 , wherein the groove includes at least one portion having a height of which is less than a height of an active part of the barrel spring.

11 . The barrel shaft as claimed in claim 6 , wherein the grove has a depth at least locally greater than or equal to a thickness of the barrel spring.

12 . The barrel shaft as claimed in claim 6 , wherein the groove has a depth equal or substantially equal to a thickness of the barrel spring.

13 . The barrel shaft as claimed in claim 6 , wherein the groove comprises a second attachment element for attaching the barrel spring, the second attachment element being adapted to cooperate with a first attachment element on the barrel spring.

14 . The barrel shaft as claimed in claim 13 , wherein the second attachment element includes a protuberance or a particular conformation of the groove or a recess in the groove.

15 . The barrel shaft as claimed in claim 14 , wherein the particular conformation of the groove includes a circumferentially oriented trapezoidal portion of the groove.

16 . A barrel including a shaft as claimed in claim 6 and a barrel spring.

17 . A clock movement including a shaft as claimed in claim 6 and a barrel spring.

18 . A watch including a shaft as claimed in claim 6 and a barrel spring.

19 . The shaft as claimed in claim 6 , wherein the groove extends more than 180° round an axis of the barrel shaft.

20 . The shaft as claimed in claim 6 , wherein the groove extends around a circumference of the barrel shaft.

21 . The shaft as claimed in claim 6 , wherein the grove has a depth greater than or equal to a thickness of the barrel spring over an entire extent of the groove.

22 . The shaft as claimed in claim 6 , wherein the groove comprises a second attachment element for attaching the barrel spring, the second attachment element being provided at a bottom of the groove.

23 . The shaft according to claim 6 , wherein the groove is adapted to accommodate more than one coil of the spring in the groove.

24 . A shaft for a clock movement barrel, comprising:
a groove extending around a circumference of the shaft and adapted to receive a barrel spring, wherein the groove comprises a housing or a conformation or a recess that has a shape adapted to be complementary or substantially complementary to a dovetail shape of a first attachment element of the barrel spring.

25 . The shaft as claimed in claim 24 , wherein the housing or the confirmation or the recess includes a circumferentially oriented trapezoidal portion.

26 . A barrel including a shaft as claimed in claim 24 and a barrel spring.

Assignees

• Rolex Sa

Inventors

• Bertrand Jean-Louis
• Bortoli Albert
• Gyger Thomas
• Von Niederhäusern Vincent

Classifications

• G04B1/14 Primary

  Mainsprings; Bridles therefor (mainsprings with bridles G04B1/18; alloys C22C; springs in general F16F {; constructions for compensation of changes in the motive power of the mainspring G04B1/22; construction of the hairspring G04B17/066; arrangements facilitating the removal of the mainspring G04B33/14}) · CPC title

• G04B1/16

  Barrels; Arbors; Barrel axles (arrangements facilitating the removal of the mainspring G04B33/14) · CPC title

• G04B1/18 Primary

  Constructions for connecting the ends of the mainsprings with the barrel or the arbor {(mainsprings and bridles therefor G04B1/14; clamping the hairspring on the regulator G04B18/026; clamping the hairspring on the arbor G04B17/32)} · CPC title