Rotary head drum apparatus and magnetic recording and playback apparatus
US6771471B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2002 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Apr 12, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/584
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A rotary head drum apparatus and a magnetic recording and playback apparatus wherein crosstalk between a writing signal and a playback signal transferred using independent rotary transformers is reduced and facility of assembly and rework of a magnetic head are improved. A flat disk-type rotary transformer for a writing signal and another flat disk-type rotary transformer for a playback signal are disposed adjacently in a stationary drum, and a shield plate for preventing crosstalk is interposed between the two rotary transformers. Alternatively, one of a writing rotary transformer and a playback rotary transformer is formed from a flat disk-type rotary transformer while the other is formed from a cylindrical rotary transformer, and the flat disk-type rotary transformer is disposed on a bottom portion of a stationary drum while the cylindrical rotary transformer is disposed on an outer circumference of a center boss of the stationary drum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.