Device for measuring the accuracy of a mechanical watch
US9383725B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2015 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | Nov 18, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04D7/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring the accuracy of a mechanical watch includes a time reference source, a calculating mechanism, and another data processing unit. The time reference source is formed by an internal time reference source, or by a receiving and processing mechanism arranged to receive and process signals transmitted by an external time source to permanently update a repeater clock internal to the device. The calculating mechanism is arranged to calculate time differences between display values, and/or between time reference points provided by the time reference source, and to calculate a variation in rate. The another data processing unit is arranged to store and process at least one variation in rate calculated by the calculating mechanism, and/or a viewing mechanism arranged to display at least one variation in rate calculated by the calculating mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.