GB696899A - 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
GB696899A
GB696899A GB1660950A GB1660950A GB696899A GB 696899 A GB696899 A GB 696899A GB 1660950 A GB1660950 A GB 1660950A GB 1660950 A GB1660950 A GB 1660950A GB 696899 A GB696899 A GB 696899A
Authority
GB
United Kingdom
Prior art keywords
recording
july
high frequency
relating
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
GB1660950A
Inventor
Frederick Reginald Evans
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 GB1660950A priority Critical patent/GB696899A/en
Publication of GB696899A publication Critical patent/GB696899A/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

696,899. Magnetic recording and reproducing apparatus. ELECTRIC & MUSICAL INDUSTRIES, Ltd. July 4, 1951 [July 4, 1950]. No. 16609/50.. Addition to 685,227. Class 40 (ii). Drawings to Specification.. An improvement in the method and apparatus for eliminating or substantially reducing spurious magnetizations in a magnetic medium as in the parent Specification, comprises the employment of an alternating magnetic field produced by means normally utilized during a recording operation to produce a high frequency recording bias. In the embodiment described, the tape is driven past the erazing, recording and reproducing heads in that order, and during reproduction the high frequency biasing signal, normally only operative during recording, continues to be fed to the recording head during reproduction.
GB1660950A 1950-07-04 1950-07-04 Improvements in or relating to a method and apparatus for reproducing magnetically-recorded sound Expired GB696899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1660950A GB696899A (en) 1950-07-04 1950-07-04 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
GB1660950A GB696899A (en) 1950-07-04 1950-07-04 Improvements in or relating to a method and apparatus for reproducing magnetically-recorded sound

Publications (1)

Publication Number Publication Date
GB696899A true GB696899A (en) 1953-09-09

Family

ID=10080414

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1660950A Expired GB696899A (en) 1950-07-04 1950-07-04 Improvements in or relating to a method and apparatus for reproducing magnetically-recorded sound

Country Status (1)

Country Link
GB (1) GB696899A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036164A (en) * 1954-09-01 1962-05-22 Philips Corp Echo effect recording

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3036164A (en) * 1954-09-01 1962-05-22 Philips Corp Echo effect recording

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