Stepping motor
US4484095A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1982 |
| Grant date | Nov 20, 1984 |
| Priority date | — |
| Expiry date | Dec 14, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K99/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to an improvement in a stepping motor composed of a stator housing containing annularly arranged electromagnets or coils with pole pieces and a magnetically conducting rotor composed of a flexible membrane solidly connected to an annular armature plate and connected to a drive shaft axially supported within the stator housing, the rotor being provided at its periphery with a toothed rim, the improvement comprising, in addition to the rotor (5), a second rotor (11) mounted on the drive shaft (3) and being composed of a flexible membrane (11') including a ring (9) provided with a toothed rim (10) conencted to the membrane (11'), the toothed rim (10) corresponding to a detent toothed rim (13) fixed to the stator housing (2), and the rotor (11) being so actuated by an electronically controlled indexing coil (15) located between the electromagnets or coils (4) that the rotor (11) is indexed or fixed in place according to the pitch of the detent toothed rim (13).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.