Electromagnetic drive device having a plurality of sinusoidal coils
US5514960A · kind A · utility
Inventors
Key dates
| Filing date | May 24, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | May 24, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic drive means for providing motion. An application is as an indicator device for registering the magnitude of an input supplied to a computer by an external sensor is described. The electromagnetic drive means includes a first stationary member that comprises electrically conductive material having a serpentine configuration that defines a plurality of alternating peaks and troughs which are selectively magnetized to provide alternating north and south magnetic fields. A second member is movable along the path of the stationary member by discrete and controlled magnetic attraction and repulsion forces set up between the members. The stationary members can be provided with a graduated scale while the movable member carries a pointer that is movable with respect to the scale to thereby indicate a magnitude of the input. A specific application of this indicator device is as a gauge in a dashboard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.