Displacement transducers employing printed coil structures
US4253079A · kind A · utility
Inventor
Key dates
| Filing date | Apr 11, 1979 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | Apr 11, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F21/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is disclosed a displacement transducer which comprises a plurality of planar circuit boards, each having a coaxial central aperture. Each of said boards having disposed thereon at least one spiral conductive structure which manifests a predetermined coil. The structure is oriented about the aperture and has a first and second terminal. The boards are positioned in a stacked array with each of said boards separated one from the other and with said central apertures aligned to form a central coaxial cavity. Leads are coupled to the first and second terminals of said boards for connecting certain ones in a primary winding configuration and others in at least two secondary configurations. A magnetic core adapted for insertion into said cavity varies the coupling between the primary and secondary windings according to the depth of insertion of said core within said cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.