Timepiece
US8807828B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2011 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | May 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B31/0123
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A timepiece includes: —a barrel bridge (33), and—a barrel mounted on the barrel bridge, the barrel having: —a drum (20) which includes an end wall and side walls, —an arbor (14) which passes through the center of the drum, —a leaf spring housed in the drum and engaging at a first end with the arbor and at a second end with the drum, and—a cover (28) through which the arbor passes freely and which closes the drum, —a ratchet wheel (30) secured to the arbor to tension the leaf spring. The drum is pivoted by a first ball bearing including an intermediate ring (36), an inner ring (42) secured to the arbor and an outer ring (38), one of the intermediate ring and the outer ring being fixed to the barrel bridge and the other being secured to the end wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.