Stepping polyphased motor for a clockwork mechanism
US4387312A · kind A · utility
6Cited by
1References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1980 |
| Grant date | Jun 7, 1983 |
| Priority date | — |
| Expiry date | Dec 12, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K21/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polyphased stepping motor for the direct driving of the second or minute pin in a clockwork. The motor comprises a disc shaped rotor (1) axially magnetized so as to have 2N alternating poles and at least two stator members (2, 3) each made by a magnetic circuit with gap and command coil (6, 7). The magnetic circuit is formed by one or two U-shaped members coupled with the said coil. The arrangement is such that the number of steps per command current period be 60 m/N. The invention also applies to motors for quartz clocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.