Flexible-disc drive spindle assembly with brushless DC motor

Details Flexible-disc drive spindle assembly with brushless DC motor Flexible-disc drive spindle assembly with brushless DC motor

1979-10-18

1981-12-15

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360133, G11B 2300

Patent

active

043062598

ABSTRACT:
The driving system which drives and rotates a flexible-disc to and from which information is written in and read out by means of a magnetic head. On the top of a driving hub the flexible-disc is attached in a detachable manner, and at the bottom part of the driving hub a driving axle is directly connected coaxially. The lower end of this driving axle itself forms the rotating axle of a direct current magnetic motor. The rotation of this motor is controlled by a rotating speed controlling system so as to rotate at speed identical to any given designated velocity.

REFERENCES:
patent: 3577133 (1971-05-01), Garfein et al.
patent: 3706085 (1972-12-01), Mowrey et al.
patent: 4005490 (1977-01-01), Duncan et al.
patent: 4101945 (1978-07-01), Butsch
patent: 4216512 (1980-08-01), Vidwans

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