GB511164A - Improvements in or relating to sound record carriers - Google Patents

Improvements in or relating to sound record carriers

Info

Publication number
GB511164A
GB511164A GB29450/37A GB2945037A GB511164A GB 511164 A GB511164 A GB 511164A GB 29450/37 A GB29450/37 A GB 29450/37A GB 2945037 A GB2945037 A GB 2945037A GB 511164 A GB511164 A GB 511164A
Authority
GB
United Kingdom
Prior art keywords
relating
layer
foundation
depositing
record carriers
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
Application number
GB29450/37A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB511164A publication Critical patent/GB511164A/en
Expired legal-status Critical Current

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
    • 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
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/657—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing inorganic, non-oxide compound of Si, N, P, B, H or C, e.g. in metal alloy or compound

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Paints Or Removers (AREA)

Abstract

511,164. Magnetic sound-records; depositing substances by electric discharge. PFLEUMER, F., and HAFNER, T., Oct. 28, 1937, No. 29450. Convention date, Nov. 2, 1936. [Class 40 (ii)] [Also in Group XL] A magnetic sound-record carrier is made by depositing a thin layer of magnetizable material by the cathode evaporation process on a non- magnetizable foundation layer having a smooth surface. The thickness of the deposited layer may be 0.1 y. The material deposited may be iron together with about 1 to 6 per cent. of carbon to improve annealing. The foundation may be paper, or a filament formed by drawing or spraying, or a disc.
GB29450/37A 1936-11-02 1937-10-28 Improvements in or relating to sound record carriers Expired GB511164A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE511164X 1936-11-02

Publications (1)

Publication Number Publication Date
GB511164A true GB511164A (en) 1939-08-07

Family

ID=6547672

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29450/37A Expired GB511164A (en) 1936-11-02 1937-10-28 Improvements in or relating to sound record carriers

Country Status (1)

Country Link
GB (1) GB511164A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743511C (en) * 1940-09-25 1944-04-25 Gema Ges Fuer Elektroakustisch Method for producing a magnetogram carrier
US2443756A (en) * 1942-12-26 1948-06-22 Brush Dev Co Magnetic material
US2694656A (en) * 1947-07-25 1954-11-16 Armour Res Found Magnetic impulse record member, magnetic material, and method of making magnetic material
US2751313A (en) * 1950-12-21 1956-06-19 Audio Devices Inc Production of magnetic sound tape
US2846650A (en) * 1952-06-26 1958-08-05 Gen Electric Light reflecting transducer device
US2900282A (en) * 1956-07-20 1959-08-18 Sperry Rand Corp Method of treating magnetic material and resulting articles
US3433721A (en) * 1960-03-28 1969-03-18 Gen Electric Method of fabricating thin films

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743511C (en) * 1940-09-25 1944-04-25 Gema Ges Fuer Elektroakustisch Method for producing a magnetogram carrier
US2443756A (en) * 1942-12-26 1948-06-22 Brush Dev Co Magnetic material
US2694656A (en) * 1947-07-25 1954-11-16 Armour Res Found Magnetic impulse record member, magnetic material, and method of making magnetic material
US2751313A (en) * 1950-12-21 1956-06-19 Audio Devices Inc Production of magnetic sound tape
US2846650A (en) * 1952-06-26 1958-08-05 Gen Electric Light reflecting transducer device
US2900282A (en) * 1956-07-20 1959-08-18 Sperry Rand Corp Method of treating magnetic material and resulting articles
US3433721A (en) * 1960-03-28 1969-03-18 Gen Electric Method of fabricating thin films

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