US2041480A - Carrier for magnetic recording - Google Patents

Carrier for magnetic recording Download PDF

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Publication number
US2041480A
US2041480A US690014A US69001433A US2041480A US 2041480 A US2041480 A US 2041480A US 690014 A US690014 A US 690014A US 69001433 A US69001433 A US 69001433A US 2041480 A US2041480 A US 2041480A
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US
United States
Prior art keywords
carrier
magnetic recording
iron
magnetic
carbonyl
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 - Lifetime
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US690014A
Inventor
Oexmann Heinrich
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Individual
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Individual
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Publication date
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Publication of US2041480A publication Critical patent/US2041480A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/642—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent self supporting magnetic material, e.g. magnetisable wires
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/928—Magnetic property
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12465—All metal or with adjacent metals having magnetic properties, or preformed fiber orientation coordinate with shape

Definitions

  • iron and nickel come primarily into question, but also compounds of different metals may be advantageously employed.
  • the metals employed as carrier must possess paramagnetic properties, as is the case for example with iron, nickel and cobalt carbonyls. In the case of compounds and alloys it is sufilcient if one component possesses paramagnetic properties so that the compound or alloy acts paramagnetically.
  • the metals in question are considerably more suitable as carrier when used in finely pulverized state than a uniform metal band.
  • the metal powder is preferably applied onto a non-magnetic support in known manner with the aid of suitable matrices. Strips of paper or cellulose derivatives are particularly suitable as supports.
  • pulverous carbonyl iron alloys may be also employed instead of pulverous carbonyl iron.
  • the paramagnetic powder I is applied in known manner in a layer of uniform thickness 20 on a non-magnetic support 2, indicated by crosshatching.
  • a carrier for magnetic recordings consisting of carbonyl iron. 25
  • a carrier for magnetic recordings comprising a metal having ferromagnetic properties obtained by thermal decomposition of iron carbonyl.

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  • Hard Magnetic Materials (AREA)

Description

May 19, 1936. H. OEXMANN 2,041,480
CARRIER FOR MAGNETIC RECORDING Filed Sept. 18, 1933 Patented May 19, 1936 UNITED STATES PATENT OFFICE Application September 18, 1933, Serial No. 690,014 In Germany September 19, 1932 2 Claims.
It is known to record sound waves in that they are converted into electromagnetic waves and these act on a magnetizable band, with the aid of which the electric waves can be reconverted 5 into sound waves.
When using steel or nickel band or wire for this purpose it has been found that a metal obtained from the corresponding carbonyl is most suitable on account of its excellent magnetic properties and its chemical purity.
For this purpose iron and nickel come primarily into question, but also compounds of different metals may be advantageously employed.
It is evident, that the metals employed as carrier must possess paramagnetic properties, as is the case for example with iron, nickel and cobalt carbonyls. In the case of compounds and alloys it is sufilcient if one component possesses paramagnetic properties so that the compound or alloy acts paramagnetically.
The metals in question are considerably more suitable as carrier when used in finely pulverized state than a uniform metal band. The metal powder is preferably applied onto a non-magnetic support in known manner with the aid of suitable matrices. Strips of paper or cellulose derivatives are particularly suitable as supports.
Surprisingly good results are obtained with such wave carriers when the carrying layer is made of carbonyl iron powder. The production of such powders is known. By decomposing iron carbonyl it is possible to produce powder with a degree of fineness which is less than 1/1000 mm. This degree of fineness of the iron powder ensures the elimination of secondary noises during 5 the reproduction of the electro-magnetic waves, especially as no foreign admixtures cause a disturbing effect. The electro-magnetic properties of such wave carriers are also surprisingly favourable because it is possible to give the powder 10 a suitable percentage of carbon.
According to that which has been stated above pulverous carbonyl iron alloys may be also employed instead of pulverous carbonyl iron.
An embodiment of the invention is illustrated 15 in the only figure of the accompanying drawing which shows a carrier in band-form in vertical section.
The paramagnetic powder I is applied in known manner in a layer of uniform thickness 20 on a non-magnetic support 2, indicated by crosshatching.
I claim:-
1. A carrier for magnetic recordings, consisting of carbonyl iron. 25
2. A carrier for magnetic recordings, comprising a metal having ferromagnetic properties obtained by thermal decomposition of iron carbonyl.
HEINRICH OEXMANN. 30
US690014A 1932-09-19 1933-09-18 Carrier for magnetic recording Expired - Lifetime US2041480A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2041480X 1932-09-19

Publications (1)

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US2041480A true US2041480A (en) 1936-05-19

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Family Applications (1)

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US690014A Expired - Lifetime US2041480A (en) 1932-09-19 1933-09-18 Carrier for magnetic recording

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2451422A (en) * 1945-03-24 1948-10-12 Linde Air Prod Co Thermochemical removal of metal with a flux-forming powder in the oxygen cutting stream
US2471534A (en) * 1943-03-29 1949-05-31 Muth William Musical instrument
US2597701A (en) * 1948-12-06 1952-05-20 Gen Aniline & Film Corp Method of producing finely divided metals
US2619454A (en) * 1945-08-30 1952-11-25 Brush Dev Co Method of manufacturing a magnetic recording medium by electrodeposition
US2698810A (en) * 1950-08-25 1955-01-04 Nat Res Corp Coating process
US2808345A (en) * 1953-04-23 1957-10-01 Robert Bosch G M B H Fa Recording tape
US2884319A (en) * 1956-11-27 1959-04-28 Budd Co Acicular metal particles from metal carbonyls and method of preparation
US2887454A (en) * 1952-11-28 1959-05-19 Ohio Commw Eng Co Light weight magnet and method of making
US2919207A (en) * 1956-01-24 1959-12-29 Max Braun Method of applying a ferromagnetic surface to a base utilizing iron carbonyl and oxygen
US3124490A (en) * 1960-06-30 1964-03-10 Variable axis magnetic

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471534A (en) * 1943-03-29 1949-05-31 Muth William Musical instrument
US2451422A (en) * 1945-03-24 1948-10-12 Linde Air Prod Co Thermochemical removal of metal with a flux-forming powder in the oxygen cutting stream
US2619454A (en) * 1945-08-30 1952-11-25 Brush Dev Co Method of manufacturing a magnetic recording medium by electrodeposition
US2597701A (en) * 1948-12-06 1952-05-20 Gen Aniline & Film Corp Method of producing finely divided metals
US2698810A (en) * 1950-08-25 1955-01-04 Nat Res Corp Coating process
US2887454A (en) * 1952-11-28 1959-05-19 Ohio Commw Eng Co Light weight magnet and method of making
US2808345A (en) * 1953-04-23 1957-10-01 Robert Bosch G M B H Fa Recording tape
US2919207A (en) * 1956-01-24 1959-12-29 Max Braun Method of applying a ferromagnetic surface to a base utilizing iron carbonyl and oxygen
US2884319A (en) * 1956-11-27 1959-04-28 Budd Co Acicular metal particles from metal carbonyls and method of preparation
US3124490A (en) * 1960-06-30 1964-03-10 Variable axis magnetic

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