NDLI: Flexible-disk magnetic memory

Content Provider	IEEE Xplore Digital Library
Author	Kaneko, R. Oguchi, S.
Copyright Year	1965
Abstract	To develop a flexible-disk magnetic memory, an experimental investigation of a new type of noncontact suspension mechanism for the flexible disk has been carried out. This suspension mechanism has an aerodynamic step thrust bearing and an aerodynamic cylindrical thrust bearing in which the magnetic heads are imbedded. The flexible disk is set between the bearings. Rotational motion of the flexible disk generates aerodynamic pressure between the flexible disk and the bearings, and keeps a small stable clearance ranging from 5 μm to 10 μm between the flexible disk and the magnetic heads. A prototype model of the flexible-disk memory has been manufactured. This model has a thin disk of mylar coated by conventional γ-oxide magnetic layer (100 mm in diameter, 33 μm in thickness). One track is capable of storing about 2000 bits. The maximum number of tracks is 36. The rotational speed of the disk is 1500 r/m or 3000 r/m. No decrease of readout signal was observed during the shock test in which the model was subjected to more than 20 G external acceleration.
Sponsorship	IEEE Magnetics Society
Starting Page	607
Ending Page	607
Page Count	1
File Size	108018
File Format	PDF
ISSN	00189464
Volume Number	8
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1972-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic memory Magnetic levitation Aerodynamics Magnetic heads Prototypes Flexible manufacturing systems Electric shock Testing Life estimation
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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