Magnetic record/playback head positioning apparatus
US4528607A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Jul 9, 1985 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18728
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for positioning magnetic record/playback heads in a floppy disk data storage and retrieval devices and including a carriage 12 upon which heads 14 and 16 are mounted, and a linear guidance mechanism comprising a fixed guide rod 18, a spring-loaded guide rod 20, and three carriage mounted bearing assemblies 25. The spring-loaded guide rod 20 is biased toward the fixed guide rod 18 and forces two of the bearing assemblies 25 against the fixed guide rod 18 by action through the third bearing assembly. Each bearing assembly 25 comprises two spherical balls 28 and 30 which are mounted in spherical seats 32 and spin in reaction to translation of the carriage 12. Radial positioning of carriage 12 and the attached heads is accomplished by a lead screw 22 driven by a stepper motor 24 which is coupled to the carriage through a zero backlash nut follower 75. Nut follower 75 is mounted in a spherical seat 122 in the carriage to allow rotation about axes perpendicular to the lead screw axis, and is restrained from rotating about the lead screw axis. Two springs 78 and 80 force the nut follower against the spherical seat and apply a torque to the nut follower about an axis perpendic…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.