Timepiece including a magnetic or capacitive device for detecting at least one reference angular position of a wheel of said timepiece
US6330207A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1999 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Apr 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94068
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Timepiece including a clockwork movement (2) provided with an analogue display (14). The wheel (4) includes a plate (8) with a toothing (6) defined by its external edge and a shaft (10). A device for detecting the angular position of the wheel (4) includes a magnetic or capacitive sensor (20) whose detection element, in particular a flat spiral coil (24), is used for detecting a variation in presence of the material, in particular a non magnetic conductive metal, forming the plate (8). The plate has at least one opening (16) situated in the intermediate region thereof between a central hole (18), and the tooth (6). The opening (16) defines a reference geometric semi-axis of the wheel (4) whose angular position is determined by the detection device provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.