Microswitch with a magnetic field sensor
US5554964A · kind A · utility
19Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1995 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Mar 2, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/95
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A microswitch includes two coaxial columnar permanent magnets having poles of the same polarity facing one another or poles of different polarities facing one another, defining an air gap therebetween. The permanent magnets generate magnetic fields defining a boundary region. A magnetic field sensor, which may or may not be chip-like, is disposed in the boundary region and is fixedly disposed in the air gap, optionally in the axial direction in the air gap. A switch device is connected to the magnetic field sensor and has a switching status varying in accordance with magnetic induction at the magnetic field sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.