GB1142993A - Improvements in or relating to magnet head arrangements - Google Patents

Improvements in or relating to magnet head arrangements

Info

Publication number
GB1142993A
GB1142993A GB4518466A GB4518466A GB1142993A GB 1142993 A GB1142993 A GB 1142993A GB 4518466 A GB4518466 A GB 4518466A GB 4518466 A GB4518466 A GB 4518466A GB 1142993 A GB1142993 A GB 1142993A
Authority
GB
United Kingdom
Prior art keywords
head
playback
recording
heads
tape
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
GB4518466A
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 Electronics UK Ltd
Original Assignee
Philips Electronic and Associated 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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1142993A publication Critical patent/GB1142993A/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
    • G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track
    • 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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
    • G11B5/53—Disposition or mounting of heads on rotating support
    • G11B5/531—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis
    • G11B5/534—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis inclined relative to the direction of movement of the tape, e.g. for helicoidal scanning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • H04N5/782—Television signal recording using magnetic recording on tape

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

1,142,993. Magnetic head. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 10 Oct., 1966 [13 Oct., 1965], No. 45184/66. Heading G5R. In a magnetic head arrangement in which separate playback 10 and recording 9 heads scan, with the playback head leading, the same track on tape 13, the head windings are interconnected and the heads are designed such that on playback the signal induced in the playback head is at least 10 times as great as the signal induced in the recording head by the same portion of tape. The recording head gap 17 is much longer than that 16 of the playback head and the number of turns on the playback coil is greater than that of the recording coil. High frequency bias current is applied to the common junction of the heads but this may be prevented from appearing across the playback head by means of a shunt capacitor. During recording any signal recorded by the playback head is erased by the bias current applied to the record head. The number of turns on the playback coil may be sufficiently large to saturate the head during recording. The heads may be separate or may form part of the same structure, Fig. 3. The playback head width may be less than that of the recording head. Where the arrangement is used for frequency modulation video recording on oblique tracks on a tape, the heads are spaced by the distance occupied by one or more complete lines. Where the video information is interlaced the heads are preferably spaced by the distance corresponding to a small whole number of frames plus, where the whole number is odd, a half line of video information.
GB4518466A 1965-10-13 1966-10-10 Improvements in or relating to magnet head arrangements Expired GB1142993A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT925265A AT257975B (en) 1965-10-13 1965-10-13 Magnetic head assembly

Publications (1)

Publication Number Publication Date
GB1142993A true GB1142993A (en) 1969-02-12

Family

ID=3612526

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4518466A Expired GB1142993A (en) 1965-10-13 1966-10-10 Improvements in or relating to magnet head arrangements

Country Status (9)

Country Link
AT (1) AT257975B (en)
BE (1) BE688222A (en)
CH (1) CH454480A (en)
DE (1) DE1499810A1 (en)
ES (1) ES332160A1 (en)
FR (1) FR1507209A (en)
GB (1) GB1142993A (en)
NL (1) NL6614203A (en)
SE (1) SE322258B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531170A (en) * 1981-05-18 1985-07-23 Tokyo Shibaura Denki Kabushiki Kaisha Combination magnetic head
GB2242774A (en) * 1990-02-16 1991-10-09 Mitsubishi Electric Corp Magnetic head

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149204A (en) * 1977-03-28 1979-04-10 International Business Machines Corporation Minor bit reduction on a magnetic head

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531170A (en) * 1981-05-18 1985-07-23 Tokyo Shibaura Denki Kabushiki Kaisha Combination magnetic head
GB2242774A (en) * 1990-02-16 1991-10-09 Mitsubishi Electric Corp Magnetic head
GB2242774B (en) * 1990-02-16 1994-09-21 Mitsubishi Electric Corp Magnetic head
US5450264A (en) * 1990-02-16 1995-09-12 Mitsubishi Denki Kabushiki Kaisha Magnetic head

Also Published As

Publication number Publication date
ES332160A1 (en) 1967-07-16
BE688222A (en) 1967-04-13
AT257975B (en) 1967-11-10
NL6614203A (en) 1967-04-14
CH454480A (en) 1968-04-15
DE1499810A1 (en) 1969-10-23
FR1507209A (en) 1967-12-29
SE322258B (en) 1970-04-06

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