Electromagnetic devices
US4090097A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1976 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Dec 17, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/1653
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic device comprises an annular member and a core member the latter having formed in its slots and the annular member having projections located in said slots. The projections and the adjacent wall of the slot define attraction faces which when a winding located in the slot is energized, are attracted towards each other thereby to produce relative movement between the members. The other faces of the projection are provided in accordance with the invention, with a coating of an electrically conductive material so that when the windings are energized eddy currents flow in the conductive material which act to assist the relative movement of the members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.