GB1199593A - Improvements in or relating to Pick-up Apparatus for Magnetically Recorded Records - Google Patents

Improvements in or relating to Pick-up Apparatus for Magnetically Recorded Records

Info

Publication number
GB1199593A
GB1199593A GB2538967A GB2538967A GB1199593A GB 1199593 A GB1199593 A GB 1199593A GB 2538967 A GB2538967 A GB 2538967A GB 2538967 A GB2538967 A GB 2538967A GB 1199593 A GB1199593 A GB 1199593A
Authority
GB
United Kingdom
Prior art keywords
magnetically recorded
pick
relating
head
north
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
GB2538967A
Inventor
Christopher John Bonny
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB2538967A priority Critical patent/GB1199593A/en
Publication of GB1199593A publication Critical patent/GB1199593A/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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/335—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only with saturated jig, e.g. for detecting second harmonic; balanced flux head
    • 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

Abstract

1,199,593. Playback of magnetic records. MARCONI CO. Ltd. 11 March, 1968 [1 June, 1967], No. 25389/67. Heading G5R. Information magnetically recorded as alternate North and South poles is read by a head having a closed, saturable core 1 and subjected to a unidirectional magnetic bias field FB. The bias field is produced by a permanent or electromagnet M and may be adjustable. As described, the head has an interrogating winding 3, supplied with a pulsed, square wave or sinusoidal signal, and an output winding 4. The effect of the field FB is to reinforce the North (say) pole fields and to reduce the South pole fields (Fig. 4) to improve resolution and/or packing density.
GB2538967A 1967-06-01 1967-06-01 Improvements in or relating to Pick-up Apparatus for Magnetically Recorded Records Expired GB1199593A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2538967A GB1199593A (en) 1967-06-01 1967-06-01 Improvements in or relating to Pick-up Apparatus for Magnetically Recorded Records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2538967A GB1199593A (en) 1967-06-01 1967-06-01 Improvements in or relating to Pick-up Apparatus for Magnetically Recorded Records

Publications (1)

Publication Number Publication Date
GB1199593A true GB1199593A (en) 1970-07-22

Family

ID=10226890

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2538967A Expired GB1199593A (en) 1967-06-01 1967-06-01 Improvements in or relating to Pick-up Apparatus for Magnetically Recorded Records

Country Status (1)

Country Link
GB (1) GB1199593A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0077832A1 (en) * 1981-05-06 1983-05-04 Censtor Corp Multitrack transducer for perpendicular recording and method for fabricating.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0077832A1 (en) * 1981-05-06 1983-05-04 Censtor Corp Multitrack transducer for perpendicular recording and method for fabricating.
EP0077832A4 (en) * 1981-05-06 1983-09-02 Censtor Corp Multitrack transducer for perpendicular recording and method for fabricating.

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees