Electronic timepiece
US4321520A · kind A · utility
13Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1979 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Jun 19, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electronic timepiece includes a stepping motor having a stator, a drive coil and a rotor which is driven in one of at least two different states. The state of the driving motor is changed in response to a change in the load of the motor or in response to the locating of the motor in an external magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.