Method for adjusting ferrous article proximity detector
US5818222A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9517
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An improved proximity detector comprising a hall effect sensor affixed to a permanent magnet, where the improvement comprises tuning the operational gradient of the magnetic field normal to the face of the detector. An apparatus and method for tuning the operational gradient of the magnetic field normal to the face of the detector is also discloses and utilizes means for generating magnetic fields parallel and perpendicular to the face of the magnetic proximity detector. The tuning apparatus changes the gradient through the application of magnetic tuning fields to the sensor magnetic, thereby changing the operational gradient axis, the operational gradient strength or both.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.