Magnetic clamp for a disk medium

Details Magnetic clamp for a disk medium Magnetic clamp for a disk medium

1988-11-29

1991-09-17

Levy, Stuart S.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

369271, 369290, 360 9904, 360 9905, 360 9912, G11B 2500, G11B 584, G11B 1702

Patent

active

050501585

ABSTRACT:
A magnetic clamp for a disk medium comprises a disk medium table for holding a disk medium, a spindle which supports the disk medium table rotatably, a hollow-cylindrical inner magnetic core and ring-shaped outer magnetic core each disposed inside the disk medium table concentrically with the spindle, a linkage magnetic core for connecting the inner and outer cores, and a permanent magnet inserted in any of the cores. The three cores form a magnetic circuit so that the magnetic flux passing through the magnetic circuit has a direction which is virtually coincident with the direction of magnetization of the permanent magnet.

REFERENCES:
patent: 4510592 (1985-04-01), Kanamaru et al.
patent: 4587647 (1986-05-01), Mak et al.
patent: 4802158 (1989-01-01), Ogusu

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