Timepiece comprising at least one chronograph function
US4655606A · kind A · utility
5Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1985 |
| Grant date | Apr 7, 1987 |
| Priority date | — |
| Expiry date | Mar 12, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04F8/003
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The timepiece of the invention includes at least a seconds hand arranged to respond to a chronograph mechanism. It comprises a single motor which receives at least two pulses per second so as to cause the seconds hand to advance by at least two steps per second. The system as disclosed enables an improvement in readability of the precision of time intervals on the one hand and on the other hand assures certain operation of the chronograph while using a stepping motor dimensioned to drive a simple timekeeper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.