DE1008013B - Magnetic recording and playback head - Google Patents

Magnetic recording and playback head

Info

Publication number
DE1008013B
DE1008013B DEI10425A DEI0010425A DE1008013B DE 1008013 B DE1008013 B DE 1008013B DE I10425 A DEI10425 A DE I10425A DE I0010425 A DEI0010425 A DE I0010425A DE 1008013 B DE1008013 B DE 1008013B
Authority
DE
Germany
Prior art keywords
winding
core
magnetic recording
head
playback head
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
DEI10425A
Other languages
German (de)
Inventor
Edward Alpers Quade
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IBM Deutschland GmbH
Original Assignee
IBM Deutschland GmbH
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 IBM Deutschland GmbH filed Critical IBM Deutschland GmbH
Publication of DE1008013B publication Critical patent/DE1008013B/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/17Construction or disposition of windings
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/488Disposition of heads
    • G11B5/4886Disposition of heads relative to rotating disc

Description

DEUTSCHESGERMAN

Gegenstand der Erfindung ist ein Kopf zur magnetischen Aufzeichnung und Wiedergabe für scheiben-, band- oder zylinderförmige Aufzeichnungsträger. Um eine rasche Einstellung auf die Aufzeichnungs- oder Entnahmestelle zu ermöglichen, ist seine Masse klein gehalten. Magnetisch wirksamer Kern und Wicklung sind gegeneinander beweglich. Die Wicklung besteht aus einer schmalen Schleife, auf welcher der Kern beweglich ist.The invention relates to a head for magnetic recording and reproduction for disk, tape or cylindrical recording media. In order to quickly adjust to the recording or to enable extraction point, its mass is kept small. Magnetically effective core and winding can move relative to one another. The winding consists of a narrow loop, on which the core is movable.

Die Beschreibung zeigt die Anwendung des Erfmdungsgedankens auf den Fall eines scheibenförmigen. Aufzeichnungsträgers.The description shows the application of the inventive concept on the case of a disc-shaped. Recording medium.

Fig. 1 ist eine perspektivische Darstellung des Kopfes;Fig. 1 is a perspective view of the head;

Fig. 2 ist eine Seitenansicht auf der Linie 2-2 der Fig. 1;Figure 2 is a side view taken on line 2-2 of Figure 1;

Fig. 3 ist ein Schnitt 3-3 von Fig. 2, undFig. 3 is a section 3-3 of Fig. 2, and

Fig. 4 ist ein Schnitt 4-4 von Fig. 2.FIG. 4 is section 4-4 of FIG.

Der Kopf besteht aus einem Kern 15 und einer Wicklung 16. Der Kern aus Werkstoff hoher Permeabilität, z. B. Mu-Metall, ist ein schmaler Streifen, der unter Einhaltung eines engen Luftspaltes 17 lose um die Wicklung 16 gebogen ist. Es ist auch möglich, den. Kern aus Folien aufzubauen. Der Luftspalt verläuft parallel zur Wicklung 16.The head consists of a core 15 and a winding 16. The core is made of high permeability material, z. B. Mu-metal, is a narrow strip, while maintaining a narrow air gap 17 loosely is bent around the winding 16. It is also possible to use the. Build core from foils. The air gap runs parallel to winding 16.

Die Wicklung 16 besteht aus einer endlosen Schleife aus einem Leitermaterial ausreichenden Querschnitts, um einen Strom von der Größenordnung 10 Ampere führen zu können. Versuche ergaben bei einem solchen Strom und einem Leiterquerschnitt der Wicklung von etwa 0,5 X 3 mm2 befriedigende Ergebnisse. In der Zeichnung besteht die Wicklung aus einer Windung, sie kann jedoch auch aus mehreren Windungen bestehen. Um die Induktivität der Wicklung klein zu halten, sind ihre beiden Zweige in möglichst kleinem Abstand parallel geführt.The winding 16 consists of an endless loop made of a conductor material of sufficient cross-section to carry a current of the order of 10 amperes. Tests with such a current and a conductor cross-section of the winding of about 0.5 × 3 mm 2 gave satisfactory results. In the drawing, the winding consists of one turn, but it can also consist of several turns. In order to keep the inductance of the winding small, its two branches are routed in parallel with the smallest possible distance.

Der Aufzeichnungsstrom und die Entnahmespannung werden mit dem Übertrager 18 zu- bzw. abgeführt, dessen Kern 20 mit der Wicklung 16 und der aus vielen Windungen bestehenden Wicklung 19 verkettet ist (Fig. 2 und 3).The recording current and the extraction voltage are supplied and discharged with the transformer 18, the core 20 of which is concatenated with the winding 16 and the winding 19 consisting of many turns is (Figs. 2 and 3).

Die Wicklung 16 wird so angebracht, daß ein möglichst kleiner Abstand zwischen der magnetisierbaren Oberfläche 22 des Aufzeichnungsträgers 21 und dem Luftspalt 17 des Kernes 15 vorhanden ist.The winding 16 is attached so that the smallest possible distance between the magnetizable Surface 22 of the recording medium 21 and the air gap 17 of the core 15 is present.

Durch nicht gezeichnete Mittel wird der Kern 15 auf seiner Wicklung längs eines Radius des scheibenförmigen, umlaufenden Aufzeichnungsträgers an die für Aufzeichnung oder Entnahme gewünschte Stelle bewegt. Die geringe zu bewegende Masse des Kerns ist für rasche Einstellung vorteilhaft, ebenso das Fehlen jeder elektrischen Verbindung zum bewegten Kopf zur magnetischen Aufzeichnung
und Wiedergabe
By means not shown, the core 15 is moved on its winding along a radius of the disk-shaped, circumferential recording medium to the location desired for recording or removal. The low moving mass of the core is advantageous for quick adjustment, as is the lack of any electrical connection to the moving head for magnetic recording
and playback

Anmelder:Applicant:

IBM DeutschlandIBM Germany

Internationale Büro-MaschinenInternational office machines

Gesellschaft m.b.H.,
Sindelfingen bei Stuttgart
Gesellschaft mbH,
Sindelfingen near Stuttgart

Beanspruchte Priorität:
V. St. v. Amerika vom 19.JuIi 1954
Claimed priority:
V. St. v. America from July 19, 1954

Edward Alpers Quade, San Jose, Calif. (V. St. Α.),
ist als Erfinder genannt worden
Edward Alpers Quade, San Jose, Calif. (V. St. Α.),
has been named as the inventor

Teil. Auch wenn der Kopf durch den Aufzeichnungsträger (ζ. B. mittels Rillen) geführt werden soll, sind diese Eigenschaften wertvoll.Part. Even if the head is to be guided through the recording medium (e.g. by means of grooves), these properties are valuable.

Neben der gezeigten Anwendung auf scheibenförmige Aufzeichnungsträger ist der Kopf für bandförmige und walzenförmige Aufzeichnungsträger brauchbar.In addition to the application shown to disk-shaped recording media, the head is for tape-shaped and roller-shaped recording media are useful.

Claims (5)

Patentansprüche:Patent claims: 1. Kopf zur magnetischen Aufzeichnung· und Wiedergabe, bestehend aus einer Wicklung und einem magnetisch wirksamen Kern, dadurch gekennzeichnet, daß Wicklung und Kern gegeneinander beweglich sind.1. Head for magnetic recording · and playback, consisting of a winding and a magnetically active core, characterized in that the winding and core are opposite one another are movable. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Wicklung die Form einer schmalen langen Schleife hat, auf deren einer Seite sich der Kern entlangbewegen kann.2. Apparatus according to claim 1, characterized in that the winding has the shape of a has a narrow long loop on one side of which the core can move. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Wicklung aus einer Windung besteht.3. Apparatus according to claim 2, characterized in that the winding consists of one turn consists. 4. Vorrichtung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß der Luftspalt des Kerns parallel zur Wicklung verläuft.4. Device according to claims 1 to 3, characterized in that the air gap of the Core runs parallel to the winding. 5. Vorrichtung nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Wicklung als Träger für den Kern dient und Mittel zu dessen wählbarer Verschiebung auf der Wicklung vorgesehen sind.5. Device according to claims 1 to 4, characterized in that the winding as Support for the core is used and means are provided for its selectable displacement on the winding are. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DEI10425A 1954-07-19 1955-07-14 Magnetic recording and playback head Pending DE1008013B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US444218A US2854525A (en) 1954-07-19 1954-07-19 Magnetic transducer

Publications (1)

Publication Number Publication Date
DE1008013B true DE1008013B (en) 1957-05-09

Family

ID=23763986

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI10425A Pending DE1008013B (en) 1954-07-19 1955-07-14 Magnetic recording and playback head

Country Status (4)

Country Link
US (1) US2854525A (en)
DE (1) DE1008013B (en)
FR (1) FR1138306A (en)
GB (1) GB796734A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3042756A (en) * 1956-12-21 1962-07-03 Ibm Rotatable magnetic transducer
US3086087A (en) * 1958-05-05 1963-04-16 Minnesota Mining & Mfg Transducer for magnetically recorded signals
US3124788A (en) * 1958-06-16 1964-03-10 Magnetic head and drum memory system
US3249927A (en) * 1961-02-13 1966-05-03 Monroe Int Transducer method and apparatus
US3535466A (en) * 1967-11-24 1970-10-20 Rca Corp High efficiency single turn magnetic head

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1883561A (en) * 1930-03-25 1932-10-18 Electric Magnetic Sound Corp Magnetic sound recording and reproducing head
DE612450C (en) * 1933-02-05 1935-04-25 Willy Hornauer Device for reproducing magnetograms
US2433207A (en) * 1945-05-19 1947-12-23 Chicago Coin Machine Co Rectilinear pole piece for magnetic sound heads
US2538981A (en) * 1947-04-26 1951-01-23 Heller Means for retracting the cores from the electromagnets of a magnetic sound recordinghead
US2497662A (en) * 1947-08-29 1950-02-14 Stackpole Carbon Co Device for tuning high-frequency circuits
US2536272A (en) * 1948-12-02 1951-01-02 Rca Corp Magnetic recording-reproducing head

Also Published As

Publication number Publication date
US2854525A (en) 1958-09-30
FR1138306A (en) 1957-06-12
GB796734A (en) 1958-06-18

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