Proximity switch with magnetic field-sensitive sensor
US6043646A · kind A · utility
95Cited by
10References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1997 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Jul 9, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9515
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A proximity switch with a magnetic field-sensitive sensor is formed of limbs of a U-shaped permanent magnet with a vertical direction of magnetization. A magnetic flux-free region, in which the sensor is fitted, is formed by three like poles. When a flat ferromagnetic triggering part is brought close to the two poles of the limbs of the U in a plane parallel to the base of the U, a switching signal which is triggered from the sensor by the cancellation of the magnetic flux-free region can be evaluated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.