Magnetic tilt sensor
US4803426A · kind A · utility
10Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1987 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Jul 16, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C9/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic tilt sensor in which a permanent magnet having a surface coated with a magnetic fluid is housed in a space inside a nonmagnetic case and is freely movable, and a magnetic sensing element is disposed to oppose the space through the case. When the case is tilted, the permanent magnet inside the space is moved to a lower position, and hence magnetism detected by the magnetic sensing element changes, thereby detecting a tilt of the case.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.