GB685227A - Improvements in or relating to a method and apparatus for reproducing magnetically recorded sound - Google Patents

Improvements in or relating to a method and apparatus for reproducing magnetically recorded sound

Info

Publication number
GB685227A
GB685227A GB1283750A GB1283750A GB685227A GB 685227 A GB685227 A GB 685227A GB 1283750 A GB1283750 A GB 1283750A GB 1283750 A GB1283750 A GB 1283750A GB 685227 A GB685227 A GB 685227A
Authority
GB
United Kingdom
Prior art keywords
medium
erazing
relating
magnetically recorded
reproducing
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
GB1283750A
Inventor
Gilbert Faraday Dutton
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1283750A priority Critical patent/GB685227A/en
Publication of GB685227A publication Critical patent/GB685227A/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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/03—Biasing
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0005—Arrangements, methods or circuits
    • G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

685,227. Magnetic reproducing. ELECTRIC & MUSICAL INDUSTRIES, Ltd. May 11, 1951 [May 23, 1950], No. 12837/50. Drawings to Specification. Class 40 (ii). In a method or apparatus for reproducing magnetically recorded signals, recorded in the presence of a high frequency bias, the medium is subjected to an erazing field which is just strong enough to reduce spurious magnetizations, such as may have resulted from contact between different portions of the medium, without having appreciable effect on the signals originally recorded on the medium. The erazing field may be applied by the normal kind of erazing head but with a reduced current, or by a solenoid surrounding the medium.
GB1283750A 1950-05-23 1950-05-23 Improvements in or relating to a method and apparatus for reproducing magnetically recorded sound Expired GB685227A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1283750A GB685227A (en) 1950-05-23 1950-05-23 Improvements in or relating to a method and apparatus for reproducing magnetically recorded sound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1283750A GB685227A (en) 1950-05-23 1950-05-23 Improvements in or relating to a method and apparatus for reproducing magnetically recorded sound

Publications (1)

Publication Number Publication Date
GB685227A true GB685227A (en) 1952-12-31

Family

ID=10012045

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1283750A Expired GB685227A (en) 1950-05-23 1950-05-23 Improvements in or relating to a method and apparatus for reproducing magnetically recorded sound

Country Status (1)

Country Link
GB (1) GB685227A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756278A (en) * 1950-05-13 1956-07-24 Rca Corp Magnetic film erasing method and system
US2876294A (en) * 1953-10-19 1959-03-03 Warner Bros Magnetic record control method and circuits
US2993096A (en) * 1956-09-25 1961-07-18 Audio Devices Inc Erasing means for magnetic recording
US3021395A (en) * 1958-12-23 1962-02-13 Beyer Eugen Magnetic recording apparatus with correction device
EP0479087A1 (en) * 1990-10-02 1992-04-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756278A (en) * 1950-05-13 1956-07-24 Rca Corp Magnetic film erasing method and system
US2876294A (en) * 1953-10-19 1959-03-03 Warner Bros Magnetic record control method and circuits
US2993096A (en) * 1956-09-25 1961-07-18 Audio Devices Inc Erasing means for magnetic recording
US3021395A (en) * 1958-12-23 1962-02-13 Beyer Eugen Magnetic recording apparatus with correction device
EP0479087A1 (en) * 1990-10-02 1992-04-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp

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