Rotary magnetic head apparatus with circuitry for driving head and circuitry for transmitting output signals in noncontact fashion disposed on rotary drums
US5737154A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1996 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Jun 18, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A rotary magnetic head apparatus is provided which is capable of reliably supplying DC power for driving to an active-type reproducing head provided within a rotary drum and which is capable of taking the reproductive output signal of the active-type head to the outside of the drum. The rotary magnetic head apparatus includes a fixed drum, a rotary drum which is rotatable with respect to the fixed drum, an active-type reproducing head, disposed on the rotary drum, for reproducing information from a magnetic tape, a constant-current circuit, disposed on the rotary drum, for supplying a constant current for driving the head to the active-type reproducing head, a noncontact signal transmission device for taking the reproductive output signal which is output when the active-type reproducing head reproduces information from the magnetic tape to the outside of the rotary drum, and a sliding-type contact device for supplying external DC power to the constant-current circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.