Tilt sensor having central first bottom surface and second contiguous bottom surface at an angle thereto
US4866379A · kind A · utility
11Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1987 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Oct 22, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is proposed a tilt sensor in which a permanent magnet having a surface coated with a magnetic field is housed in a hollow portion of a nonmagnetic case, and a magnetic sensing element is disposed outside a bottom portion of the case. When the case is tilted at an angle exceeding a predetermined angle, the permanent magnet is greatly moved and the magnetic sensing element detects the movement of the magnet. Furthermore, adverse influences due to magnetic attraction between the permanent magnet and the magnetic sensing element or a surface tension of the magnetic fluid are compensated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.