Timepiece
US7942573B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2007 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Feb 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B31/0123
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A timepiece includes a platen (10) and a barrel mounted on the platen, the barrel including: a drum (20) with a bottom and side walls; a shaft (14) extending through the drum at the center thereof and provided with pivoting elements (40, 54) on the platen; a leaf spring provided in the drum and co-operating with the shaft at one end and with the drum at the other end; and a lid (28) through which the shaft extends and closing the drum, a ratchet wheel (30) being kinematically connected to the shaft for winding the spring. According to the invention, the drum is pivoted via a first ball bearing (34) having a bushing (36) connected to the platen and another bushing (38) connected to the bottom of the drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.