Magnetic device for pivoting an arbor in a timepiece movement
US9690256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2016 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Jun 8, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The device for pivoting an arbor about a determined axis includes at least one magnetic bearing including a magnet which exerts a force of attraction on a pivot, made of magnetic material, of the arbor. Further, the bearing includes a magnetic flux centring structure arranged between the magnet and the pivot, and a support for the centring structure. This centring structure includes a peripheral portion and a central portion resiliently connected to the peripheral portion by at least one connecting element, the central portion being formed of a highly magnetically permeable material and having smaller dimensions than those of the magnet. The peripheral portion is rigidly force fitted to the support so that the central portion is centred on the pivot axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.