BE820982A - SOFT MAGNETIC DISC MEMORY - Google Patents

SOFT MAGNETIC DISC MEMORY

Info

Publication number: BE820982A
Authority: BE; Belgium
Prior art keywords: soft magnetic; magnetic disc; disc memory; memory; soft
Prior art date: 1973-10-12

Application number

BE149454A

Other languages

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1973-10-12

Filing date

1974-10-11

Publication date

1975-02-03

1974-10-11 Application filed filed Critical

1975-02-03 Publication of BE820982A publication Critical patent/BE820982A/en

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/34—Guiding record carriers during transducing operation, e.g. for track following
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
- G11B17/022—Positioning or locking of single discs
- G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
- G11B17/032—Positioning by moving the door or the cover
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/32—Maintaining desired spacing between record carrier and head, e.g. by fluid-dynamic spacing

BE149454A 1973-10-12 1974-10-11 SOFT MAGNETIC DISC MEMORY BE820982A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US40613773A	1973-10-12	1973-10-12

Publications (1)

Publication Number	Publication Date
BE820982A true BE820982A (en)	1975-02-03

Family

ID=23606684

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE149454A BE820982A (en)	1973-10-12	1974-10-11	SOFT MAGNETIC DISC MEMORY

Country Status (9)

Country	Link
JP (1)	JPS5321850B2 (en)
BE (1)	BE820982A (en)
CA (1)	CA1056499A (en)
DE (1)	DE2441881B2 (en)
FR (1)	FR2247786B1 (en)
GB (1)	GB1465288A (en)
IT (1)	IT1020144B (en)
NL (1)	NL7412744A (en)
SE (1)	SE401285B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4151573A (en) *	1977-06-13	1979-04-24	Tandon Magnetics Corp.	Magnetic recording device for double sided media
DE2812574C3 (en) *	1978-03-22	1981-01-29	Siemens Ag, 1000 Berlin Und 8000 Muenchen	Floppy disk drive
JPS6245329Y2 (en) *	1980-10-07	1987-12-03
AT391377B (en) *	1980-12-31	1990-09-25	Sony Corp	DRIVE UNIT FOR A FLEXIBLE PLATE
JPS57162147A (en) *	1981-03-27	1982-10-05	Nec Corp	Magnetic recorder

1974
- 1974-08-23 IT IT26544/74A patent/IT1020144B/en active
- 1974-08-30 FR FR7430004A patent/FR2247786B1/fr not_active Expired
- 1974-08-31 DE DE19742441881 patent/DE2441881B2/en active Granted
- 1974-09-19 CA CA209,552A patent/CA1056499A/en not_active Expired
- 1974-09-26 NL NL7412744A patent/NL7412744A/en not_active Application Discontinuation
- 1974-09-27 JP JP11067674A patent/JPS5321850B2/ja not_active Expired
- 1974-10-08 GB GB4344274A patent/GB1465288A/en not_active Expired
- 1974-10-09 SE SE7412659A patent/SE401285B/en unknown
- 1974-10-11 BE BE149454A patent/BE820982A/en not_active IP Right Cessation

Also Published As

Publication number	Publication date
JPS5067620A (en)	1975-06-06
FR2247786B1 (en)	1978-10-27
SE401285B (en)	1978-04-24
DE2441881B2 (en)	1976-04-29
SE7412659L (en)	1975-04-14
IT1020144B (en)	1977-12-20
FR2247786A1 (en)	1975-05-09
CA1056499A (en)	1979-06-12
JPS5321850B2 (en)	1978-07-05
NL7412744A (en)	1975-04-15
DE2441881A1 (en)	1975-04-24
GB1465288A (en)	1977-02-23

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FR2325148A1 (en)	1977-04-15	RESYNCHRONIZABLE MAGNETIC BUBBLE MEMORY
BE820266A (en)	1975-01-16	DOUBLE DISC VALVE
IT1027873B (en)	1978-12-20	PERFECTED DISK MEMORY
BE835849A (en)	1976-05-21	EXCHANGEABLE MAGNETIC MEMORY ELEMENT
BE791239A (en)	1973-05-10	MAGNETIC MEMORY
IT994172B (en)	1975-10-20	CASSETTE MAGNETOPHONE
IT1015215B (en)	1977-05-10	SELECTION MECHANISM FOR A MAGNETIC DISK MEMORY
BE810109A (en)	1974-05-16	MAGNETIC MEMORY ARRANGEMENT
FR2332593A1 (en)	1977-06-17	MEMORY WITH MAGNETIC AREAS
IT956127B (en)	1973-10-10	MAGNETIC MEMORY

Legal Events

Date	Code	Title	Description
1987-04-30	RE	Patent lapsed	Owner name: INTERNATIONAL BUSINESS MACHINES CORP. Effective date: 19861031

Date

Code

Title

Description

1987-04-30

Patent lapsed

Owner name: INTERNATIONAL BUSINESS MACHINES CORP.

Effective date: 19861031