Recording disk centering and clamping apparatus
US4709283A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1985 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Sep 10, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus for data transfer with a disk cartridge having a flexible magnetic disk rotatably housed in a protective envelope with some play in its own plane. A motor driven hub has a socket defined concentrically therein, with an annular disk bearing surface formed around the socket. Rotatably mounted to a hinged clamp arm, a clamp has a tapered collet engageable in the socket in the drive hub through a central opening in the magnetic disk, and a flange on the collet for clamping an exposed annular portion of the disk against the disk bearing surface. Being loose in the protective envelope, the magnetic disk has been liable to be caught in the drive hub socket by the tapered collet which travels along an arcuate locus into engagement in the socket. In order to preclude this possibility, the disk cartridge on being loaded in the apparatus is so positioned on the drive hub that the geometrical center of the disk cartridge is offset a specified distance from the axis of rotation of the drive hub in a direction away from the fulcrum of the clamp arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.