GB932049A - Improvements in or relating to erasing heads for magnetic tape - Google Patents

Improvements in or relating to erasing heads for magnetic tape

Info

Publication number
GB932049A
GB932049A GB454660A GB454660A GB932049A GB 932049 A GB932049 A GB 932049A GB 454660 A GB454660 A GB 454660A GB 454660 A GB454660 A GB 454660A GB 932049 A GB932049 A GB 932049A
Authority
GB
United Kingdom
Prior art keywords
heads
erase
circuited
feb
relating
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
GB454660A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB932049A publication Critical patent/GB932049A/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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • 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
    • G11B5/024—Erasing
    • 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
    • G11B5/29—Structure or manufacture of unitary devices formed of plural heads for more than one track

Landscapes

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

Abstract

932,049. Erasing magnetic tapes. PHILIPS ELECTRICAL INDUSTRIES Ltd. Feb. 9, 1960 [Feb. 12, 1959], No. 4546/60. Class 40 (2). To prevent cross-coupling between adjacent erase heads 2, 3, 4, from influencing the erasure of individual tracks on a tape 1, alternate erase heads, all of the two consecutive gaptype, have the windings arranged on the centre or outer core-limbs respectively, Fig. 2. To avoid switching pulses appearing in other tracks when a head is to be energized, due to stray and self-capacities 15, 16, heads, e.g. 2 and 4, with like-orientated windings, heads out of use are short-circuited and are individually open-circuited by coupled switches, Fig. 3, before the erase current is applied.
GB454660A 1959-02-12 1960-02-09 Improvements in or relating to erasing heads for magnetic tape Expired GB932049A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL236067 1959-02-12

Publications (1)

Publication Number Publication Date
GB932049A true GB932049A (en) 1963-07-24

Family

ID=19751569

Family Applications (1)

Application Number Title Priority Date Filing Date
GB454660A Expired GB932049A (en) 1959-02-12 1960-02-09 Improvements in or relating to erasing heads for magnetic tape

Country Status (6)

Country Link
BE (1) BE587455A (en)
CH (1) CH389930A (en)
DE (1) DE1172057B (en)
DK (1) DK103746C (en)
FR (1) FR1247763A (en)
GB (1) GB932049A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE949126C (en) * 1948-01-08 1956-09-13 Svenska A B Gasaccumulator Magnetizing head
US2689274A (en) * 1953-04-30 1954-09-14 Rca Corp Recording on magnetic tape

Also Published As

Publication number Publication date
DK103746C (en) 1966-02-14
CH389930A (en) 1965-03-31
DE1172057B (en) 1964-06-11
BE587455A (en) 1960-06-10
FR1247763A (en) 1960-12-02

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