Low mass actuator system for magnetic recording disks with half strength end poles
US4396966A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1980 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Dec 31, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5521
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A linear motor adapted for driving a magnetic recording head reciprocably across the surface of a magnetic recording disk in a disk file has its stator located between the disks. The stator includes parallel magnetic yokes composed of plates extending parallel to the disks. At least one of the plates carries an array of regularly spaced and alternating magnetic pole elements, rigidly secured to one yoke with a gap extending between the yokes including the alternating poles providing a space within which the armature reciprocates, from one magnetic polarity to the opposite a plurality of times per reciprocation of the armature. End poles are provided at each end of the array, which are matched to collect the return flux from the adjacent distal pole to reduce fringing flux which emanates towards the disks and the recording heads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.