BE581148A - Appareil de dégaussage ou de démagnetisation. - Google Patents

Appareil de dégaussage ou de démagnetisation.

Info

Publication number
BE581148A
BE581148A BE581148A BE581148A BE581148A BE 581148 A BE581148 A BE 581148A BE 581148 A BE581148 A BE 581148A BE 581148 A BE581148 A BE 581148A BE 581148 A BE581148 A BE 581148A
Authority
BE
Belgium
Prior art keywords
degaussing
demagnetization
Prior art date
Application number
BE581148A
Other languages
English (en)
Inventor
Cyril Bernhard Troronslin
John Francis Sweeney Jr
Dwight Woodford Brede
Jameses Wade Dorsett Jr
Original Assignee
Ampex
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.)
Filing date
Publication date
Application filed by Ampex filed Critical Ampex
Publication of BE581148A publication Critical patent/BE581148A/fr

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/04—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings operated by hand
    • H03J5/12—Settings determined by a number of separately-actuated driving means which adjust the tuning element directly to desired settings
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/024—Erasing
    • G11B5/0245—Bulk erasing
BE581148A 1958-07-30 1959-07-28 Appareil de dégaussage ou de démagnetisation. BE581148A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US752118A US3023280A (en) 1958-07-30 1958-07-30 Degaussing apparatus

Publications (1)

Publication Number Publication Date
BE581148A true BE581148A (fr) 1959-11-16

Family

ID=25024952

Family Applications (1)

Application Number Title Priority Date Filing Date
BE581148A BE581148A (fr) 1958-07-30 1959-07-28 Appareil de dégaussage ou de démagnetisation.

Country Status (8)

Country Link
US (1) US3023280A (fr)
BE (1) BE581148A (fr)
CH (1) CH364909A (fr)
DE (1) DE1207963B (fr)
FR (1) FR1230951A (fr)
GB (1) GB871420A (fr)
NL (2) NL241715A (fr)
SE (1) SE301556B (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1104202B (de) * 1959-04-18 1961-04-06 Agfa Ag Wechselfeldloescheinrichtung fuer magnetische Speicher
GB1020522A (en) * 1963-10-15 1966-02-16 Amos Of Exeter Ltd Bulk-tape eraser
US3506884A (en) * 1967-03-29 1970-04-14 Milton A Mckinley Magnetic tape degaussing unit
US3660727A (en) * 1968-10-16 1972-05-02 Sony Corp Bulk eraser with permanent magnet flux produced obliquely to cassette movement
DE2716587A1 (de) * 1977-04-14 1978-10-19 Siemens Ag Vorrichtung zum loeschen der information auf tonbaendern von tonbandkassetten
US4346426A (en) * 1981-01-07 1982-08-24 Fluxcom, Inc. Magnetic tape de-gausser and method of erasing magnetic recording tape
US4467389A (en) * 1982-03-26 1984-08-21 Christie Electric Corp. Magnetic tape degausser and method of erasing magnetic recording tape
US4551782A (en) * 1983-09-09 1985-11-05 Rfl Industries, Inc. Method and apparatus for degaussing magnetic storage media
US4672345A (en) * 1985-09-24 1987-06-09 Electro-Matic Products Co. Degausser/demagnetizer
US4751608A (en) * 1986-10-14 1988-06-14 Data Security, Inc. Bulk degausser
US4730230A (en) * 1987-03-31 1988-03-08 Dowty Rfl Industries, Inc. Apparatus and method for degaussing magnetic storage media
DE3736024C1 (en) * 1987-10-24 1989-03-23 Agfa Gevaert Ag Demagnetising device
US5721665A (en) * 1995-08-18 1998-02-24 Data Security, Inc. Modulated magnet field bulk degaussing system
US5969933A (en) * 1998-03-25 1999-10-19 Data Security, Inc. Transient magnet field degaussing system
US5959824A (en) * 1998-03-25 1999-09-28 Data Security, Inc. Transient magnetic field degaussing system with auto calibration
US6731491B2 (en) 2001-06-15 2004-05-04 Data Security, Inc. Bulk degausser with fixed arrays of magnet poles
US7164569B1 (en) 2004-06-30 2007-01-16 Data Security, Inc. Mechanism for automated permanent magnet degaussing
US20060018075A1 (en) * 2004-07-23 2006-01-26 Data Security, Inc. Permanent magnet bulk degausser
US7715166B2 (en) * 2006-07-14 2010-05-11 Data Security, Inc. Method and reciprocating apparatus for permanent magnet erasure of magnetic storage media
US7701656B2 (en) * 2006-07-14 2010-04-20 Data Security, Inc. Method and apparatus for permanent magnet erasure of magnetic storage media
US20090284890A1 (en) * 2008-05-16 2009-11-19 Thiel Leroy D Mechanism and Method for Permanent Magnet Degaussing

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE652011C (de) * 1937-10-23 Siemens & Halske Akt Ges Vorrichtung zum Vormagnetisieren von Magnetogrammtraegern bzw. zum Loeschen von Magnetogrammen
DE673134C (de) * 1937-02-19 1939-03-16 Aeg Einrichtung zum Entmagnetisieren des Loesch- und/oder Sprechkopfes
DE754413C (de) * 1942-04-17 1952-10-27 Lorenz C Ag Loeschkopf fuer magnetische Tonaufzeichnungen
DE972166C (de) * 1942-06-03 1959-05-27 Telefunken Gmbh Verfahren und Vorrichtung zum Loeschen eines Magnetogrammtraegers, der zu einer Spule gewickelt ist
GB667011A (en) * 1950-02-03 1952-02-20 Otto Kurt Kolb Improved method of and apparatus for erasing signals from magnetic sound record carriers
GB769727A (en) * 1953-12-31 1957-03-13 Ibm Magnetic tape erasing apparatus
US2846518A (en) * 1955-10-05 1958-08-05 Bell Telephone Labor Inc Means for erasing a magnetic record

Also Published As

Publication number Publication date
NL110207C (fr)
GB871420A (en) 1961-06-28
US3023280A (en) 1962-02-27
SE301556B (fr) 1968-06-10
FR1230951A (fr) 1960-09-21
CH364909A (fr) 1962-10-15
DE1207963B (de) 1965-12-30
NL241715A (fr)

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