Barrel shaft for a clock movement, barrel spring and barrel including such a spring and/or such a shaft
US9448533B2 · kind B2 · utility
1Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2013 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Apr 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B1/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.