Magnetic sensor having a hollow housing sealed with a shield cap
US4117523A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1977 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Feb 10, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/0007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic sensor includes a housing in which flux producing means which comprises an electromagnet or a permanent magnet is received. A pair of magnetoelectric transducer elements are secured to a surface of the flux producing means which represents a magnetic pole, with a given spacing between the elements. In order to dispose the magnetoelectric transducer elements as close as possible to the outer surface of the housing, the latter is formed with a through opening at a corresponding position. The through opening is covered by a thin shield cap to protect the magnetoelectric transducer elements from a member being detected which is passed in sliding contact with or very close to the outer surface of the housing and to provide an enclosed construction for the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.