Electronic timepiece
US4312059A · kind A · utility
14Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1978 |
| Grant date | Jan 19, 1982 |
| Priority date | — |
| Expiry date | Apr 20, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04C3/143
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an electronic timepiece, a motor is driven by a pulse having a shorter pulse width than the conventional driving pulse and afterwards, a detection pulse is applied to the motor coil so as to determine rotation of the rotor. If the rotor fails to rotate a correction is effected by driving the motor by a pulse having a pulse width greater than the normal driving pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.