Permanent multi-pole position magnet
US6271660A · kind A · utility
9Cited by
6References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1999 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Jun 11, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/485
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A precision permanent position magnet assembly for use with a magnetostrictive linear displacement transducer having a magnetostrictive waveguide to provide an enhanced return signal is disclosed. The North-South axes of the magnet assembly are perpendicular to the waveguide center line axis and preferably includes three bar-type permanent magnets in a side by side alternating polarity configuration spaced apart with the pole spacing being one-half the wavelength of the return signal imposed on the waveguide. Three sets of such magnets may be radially disposed at 120 degree increments in a non-magnetic carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.