Arrangement in a magnetic position indicator
US4712420A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1986 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Feb 28, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/145
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for sensing the relative position between a fixed first machine component and an axially displaceable and pivotably mounted second machine component includes first and second bar-shaped magnets disposed at mutually right angles and rigidly connected to the second machine component, each of the magnets having a free pole; and a plurality of transducers rigidly connected to the first machine component and facing the free poles of the magnets for sensing the magnetic field of said magnets. At each long side of each of the first and second magnets an adjacent magnet disposed in parallel with the respective first or second magnet, each of these adjacent magnets having a free pole disposed in the vicinity of the free pole of the respective first or second magnet. The free poles of the first and the second magnets have a polarity reverse to that of the free poles of the adjacent magnets, and each magnet has opposite to its free pole a second pole directed away from the transducers. At least the second poles of the mutually parallel magnets are magnetically connected. The location and the orientation of the magnets causes the extension of the magnetic field at the free poles of t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.