Magnetic scaling device
US4484391A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1982 |
| Grant date | Nov 27, 1984 |
| Priority date | — |
| Expiry date | Oct 15, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/001
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic scaling device has a housing formed at least partly of non-magnetic material, such as aluminum or stainless steel. A magnetic scale is disposed on the housing, and a reading head is disposed within the housing and provides an output signal corresponding to relative linear displacement of the reading head and the magnetic scale. In addition, a reference magnetizing body can be disposed on the housing, and a reference magnetic detector can be disposed within the housing to provide a reference signal in response to linear displacement of the detector to a predetermined position corresponding to the position of the reference magnetizing body. At least one of the magnetic scale and the reference magnetizing body is disposed on the exterior of the housing on a non-magnetic portion thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.