Magnetic recording device with rotating head
US4791514A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1986 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Jul 28, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/538
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The magnetic recording device with rotating head according to the invention comprises a magnetic recording medium, a cylindrical and rotating head, a fixed magnetic excitation circuit; the head comprising, on its surface, two movable pole pieces separated by a gap and each magnetically linked to an initial and a second magnetic circuit in the shape of a portion of a ring and providing a rotating joint to the passage of the magnetic flux, with the fixed, magnetic excitation circuit possessing an excitation coil that induces an magnetic field in a magnetic circuit having two fixed pole pieces, each magnetically coupled by a gap to one of the said rings. Application: Video tape recorders in particular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.