Crown setting device for a timepiece
US5742565A · kind A · utility
44Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 1996 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | May 21, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B27/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Crown setting device for an alarm setting crown and/or a time setting crown in an analog wristwatch uses a rotatable top ring mounted on the watch case, having gear teeth on its underside which mesh with gear teeth on the crown(s) to rotate the crown(s). This serves to set the time and/or alarms with less time and effort than conventional crown setting. Preferably involute gear teeth are used, but a simple version employs the conventional crown knurling as "teeth".
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.