DE605152C - Magnetic record carrier - Google Patents
Magnetic record carrierInfo
- Publication number
- DE605152C DE605152C DEO20091D DEO0020091D DE605152C DE 605152 C DE605152 C DE 605152C DE O20091 D DEO20091 D DE O20091D DE O0020091 D DEO0020091 D DE O0020091D DE 605152 C DE605152 C DE 605152C
- Authority
- DE
- Germany
- Prior art keywords
- record carrier
- carbonyl
- magnetic record
- iron
- powder
- 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.)
- Expired
Links
Classifications
-
- 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
-
- 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
-
- 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
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
Landscapes
- Paints Or Removers (AREA)
Description
Träger für magnetische Aufzeichnung Es ist bekannt, Licht- und Tonwellen dadurch aufzuzeichnen, daß sie in magnetelektrische Wellen umgewandelt werden, und daß diese auf ein magnetisierbares Band einwirken, mit dessen Hilfe später die elektrischen Wellen wieder in Licht- und Tonwellen umgewandelt werden können. Soweit hierfür Stahlband oder Nickelhand oder Draht benutzt werden :soll, hat sich gezeigt, daß auf Grund seiner hervorragenden magnetischen Eigenschaften und seiner vollkommenen Reinheit sich hierfür am besten ein paramagnetisches Metall eignet, das aus dementsprechenden Carbonyl gewonnen wurde, beispielsweise Eisen-, Nickel- und Kob,altcarb-inyl. Es kommen hierfür in erster Linie Eisen und Nickel in Frage; ,äber auch Verbindungen verschiedener Metalle können mit Vorteil verwendet werden.Magnetic recording media It is known to have light and sound waves to be recorded by being converted into magneto-electric waves, and that these act on a magnetizable tape, with the help of which later the electrical Waves can be converted back into light and sound waves. So much for this Steel tape or nickel hand or wire should be used: it has been shown that due to its excellent magnetic properties and its perfect For this purity, a paramagnetic metal is best suited, which is made from the corresponding Carbonyl was obtained, for example iron, nickel and cob, altcarb-inyl. It iron and nickel are primarily used for this; , but also connections various metals can be used to advantage.
Wesentlich geeigneter als einheitliche Bänder aus Metall sind bekanntlich die betreffenden Metalle, wenn sie in fein gepulverter Form Verwendung finden. Vorteilhaft wird das Metallpulver in bekannter Weise mittels geeigneter Bindemittel auf eine nicht magnetische Unterlage aufgebracht. Als Unterlage eignen sich besonders Streifen aus Papier oder Celluloid.It is known that they are considerably more suitable than uniform strips made of metal the metals in question if they are used in finely powdered form. Advantageous is the metal powder in a known manner by means of suitable binders on a non-magnetic pad applied. Strips are particularly suitable as a base made of paper or celluloid.
Ganz überraschend gute Ergebnisse zeigen diese bekannten Wellenträger, wenn sie aus Pulver von Carbonyleisen hergestellt sind. Die Herstellung derartiger Pulver ist an sich bekannt. Durch Zersetzung von Eisencarbonyl ist es möglich, Pulver von einer Feinheit herzustellen, die unter 1100ö liegt. Diese Feinheit des Eisenpulvers gewährleistet das Fehlen von Nebengeräuschen bei der Wiedergabe der magnetelektrischen Wellen, insbesondere da auch keinerlei fremde Beimischungen störend einwirken. Überraschend günstig sind auch die magnetelektrischen Eigenschaften derartiger Wellenträger, da es möglich ist, dem Pulver einen Kohlenstoffgehalt in geeigneter Höhe zu geben.These well-known shaft carriers show surprisingly good results, when made from powder of carbonyl iron. The manufacture of such Powder is known per se. By decomposing iron carbonyl it is possible to make powder of a fineness that is less than 1100ö. This fineness of iron powder ensures the absence of background noise when playing the magneto-electric Waves, especially since no foreign admixtures have a disruptive effect. Surprised The magnetoelectric properties of such shaft carriers are also favorable, since it is possible to give the powder a suitable level of carbon.
Carbonyleisen. ist ferner dadurch ausgezeichnet, daß seine kleinsten Teilchen sich sehr weitgehend der Kugelgestalt nähern und daher keine bevorzugte Richtung haben. Die mit solchem Eisenpulver bedeckten bandförmigen Lautschriftträger eignen sich sowohl für Längsar gnetisierung als auch für Quermagnetisierung.Carbonyl iron. is also distinguished by the fact that its smallest Particles approach the spherical shape very largely and are therefore not preferred Have direction. The ribbon-shaped phonetic carriers covered with such iron powder are suitable for both longitudinal magnetization and transverse magnetization.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEO20091D DE605152C (en) | 1932-09-20 | 1932-09-20 | Magnetic record carrier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEO20091D DE605152C (en) | 1932-09-20 | 1932-09-20 | Magnetic record carrier |
Publications (1)
Publication Number | Publication Date |
---|---|
DE605152C true DE605152C (en) | 1934-11-05 |
Family
ID=7355144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEO20091D Expired DE605152C (en) | 1932-09-20 | 1932-09-20 | Magnetic record carrier |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE605152C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE910346C (en) * | 1949-04-08 | 1954-04-29 | Dictaphone Corp | Sound recording medium and process for its manufacture |
-
1932
- 1932-09-20 DE DEO20091D patent/DE605152C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE910346C (en) * | 1949-04-08 | 1954-04-29 | Dictaphone Corp | Sound recording medium and process for its manufacture |
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