Magnetic head soft loading and unloading device

Details Magnetic head soft loading and unloading device Magnetic head soft loading and unloading device

1980-09-30

1983-02-22

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360105, G11B 2112, G11B 554

Patent

active

043750702

ABSTRACT:
The invention is related to a magnetic head loading and unloading device and includes an electromagnet having a spring loaded armature operative to load a double-sided flexible magnetic recording disc having two associated opposite magnetic heads and resiliently unloading the magnetic heads from the recording disc. A permanent magnet is connected to the armature and forms a speed sensor with an associated solenoid to sense the loading or an unloading speed of the magnetic heads. The solenoid includes an output connected to a negative input of a differential amplifier which includes a positive input comprising a command loading signal. The amplifier output is connected to a winding for exciting the electromagnet through an emitter grounded transistor.

REFERENCES:
patent: 3668666 (1972-06-01), Heffernan et al.
patent: 4202020 (1980-05-01), Lovgren et al.
patent: 4218714 (1980-08-01), Isozaki et al.
3rd USA-Japan Computer Conference Proceedings, M. Kakuda et al., 1978, pp. 355-359, Oct. 10-12, San Francisco, CA.
IBM Technical Disclosure Bulletin-vol. 18, No. 7, Dec. 1975, N.Y. (US) E. L. Bailey et al.: Read/Write Head Load-Unload Device-pp. 2246-2247.
DE-A 2 904 630 (Hitachi Ltd.).
US-A 4,241,366.
DE-B 2 608 144 (Siemens AG).
DE-A 851 841.
Patent Abstracts of Japan-vol. 3, No. 82, Jul. 14, 1979, pp. 90E 123 and JP-A 54 60 908 (Mitsubishi Denki KK) (May 16, 1979).
FR-A 2 260 910 (Philips).

Affiliated with

Also associated with

Rating

Magnetic head soft loading and unloading device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic head soft loading and unloading device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic head soft loading and unloading device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1375266