GB802210A - Improvements in or relating to magnetic recording and/or reproducing apparatus - Google Patents

Improvements in or relating to magnetic recording and/or reproducing apparatus

Info

Publication number
GB802210A
GB802210A GB1470555A GB1470555A GB802210A GB 802210 A GB802210 A GB 802210A GB 1470555 A GB1470555 A GB 1470555A GB 1470555 A GB1470555 A GB 1470555A GB 802210 A GB802210 A GB 802210A
Authority
GB
United Kingdom
Prior art keywords
head
amplifier
signals
heads
cylinder
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
GB1470555A
Inventor
Alan Stone
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 GB1470555A priority Critical patent/GB802210A/en
Priority to DEE12403A priority patent/DE1048039B/en
Publication of GB802210A publication Critical patent/GB802210A/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
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
    • 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
    • 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
    • G11B5/17—Construction or disposition of windings
    • 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
    • G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

802,210. Magnetic recording and reproducing apparatus. ELECTRIC & MUSICAL INDUSTRIES, Ltd. May 7, 1956 [May 21, 1955], No. 14705/55. Class 40 (2). In a magnetic record apparatus having two transducing heads having gaps in planes not greater than 45 degrees to each other, mutual inductive interference is reduced by arranging the axes of the inductive windings on two adjacent heads to be at right angles to each other. The arrangement is described with reference to an embodiment for a data storage apparatus in which two heads 1, 2 engage an identical endless track on a cylinder. In order that an immediate output of the signals, having a square waveform, may be obtained irrespective of the relative rotational position of the cylinder the signals are initially recorded by head 2 via an amplifier 14, read by head 1 and fed back via amplifier 16 and clipping circuit 17 to the head 2 which re-records them. Thus at any time the circulating data can be abstracted from the leads 18 connected to amplifier 16. In view of the very much larger signal current in head 2 it is therefore essential that inductive coupling be reduced to a minimum in order that the signals read by head 1 are not swamped. Specifications 599,751, 642,136 and 707,634, [Group XIX], are referred to.
GB1470555A 1955-05-21 1955-05-21 Improvements in or relating to magnetic recording and/or reproducing apparatus Expired GB802210A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1470555A GB802210A (en) 1955-05-21 1955-05-21 Improvements in or relating to magnetic recording and/or reproducing apparatus
DEE12403A DE1048039B (en) 1955-05-21 1956-05-18 Magnetic recording and / or reproducing apparatus, in particular for data storage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1470555A GB802210A (en) 1955-05-21 1955-05-21 Improvements in or relating to magnetic recording and/or reproducing apparatus

Publications (1)

Publication Number Publication Date
GB802210A true GB802210A (en) 1958-10-01

Family

ID=10046073

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1470555A Expired GB802210A (en) 1955-05-21 1955-05-21 Improvements in or relating to magnetic recording and/or reproducing apparatus

Country Status (2)

Country Link
DE (1) DE1048039B (en)
GB (1) GB802210A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1146540B (en) * 1958-09-15 1963-04-04 Ibm Multi-track magnetic head
US3165592A (en) * 1959-04-23 1965-01-12 Bull Sa Machines Method of and means for neutralizing inductive disturbances in magnetic reproducers
US3274573A (en) * 1961-08-21 1966-09-20 Burroughs Corp Magnetic transducer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL234709A (en) * 1958-01-14
DE1229585B (en) * 1961-08-21 1966-12-01 Burroughs Corp Magnetic head assembly for recording and playback

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB747767A (en) * 1953-05-26 1956-04-11 Cole E K Ltd Improvements in or relating to sound recording and reproducing devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1146540B (en) * 1958-09-15 1963-04-04 Ibm Multi-track magnetic head
US3165592A (en) * 1959-04-23 1965-01-12 Bull Sa Machines Method of and means for neutralizing inductive disturbances in magnetic reproducers
US3274573A (en) * 1961-08-21 1966-09-20 Burroughs Corp Magnetic transducer

Also Published As

Publication number Publication date
DE1048039B (en) 1958-12-31

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