GB1239918A - Magnetic recording - Google Patents

Magnetic recording

Info

Publication number
GB1239918A
GB1239918A GB3408967A GB3408967A GB1239918A GB 1239918 A GB1239918 A GB 1239918A GB 3408967 A GB3408967 A GB 3408967A GB 3408967 A GB3408967 A GB 3408967A GB 1239918 A GB1239918 A GB 1239918A
Authority
GB
United Kingdom
Prior art keywords
magnetic
rotor
polepieces
record
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
GB3408967A
Inventor
John Lauder
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3408967A priority Critical patent/GB1239918A/en
Priority to NL7109812A priority patent/NL7109812A/xx
Priority to DE19712135865 priority patent/DE2135865A1/en
Publication of GB1239918A publication Critical patent/GB1239918A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04N5/7824—Television signal recording using magnetic recording on tape with rotating magnetic heads
    • H04N5/7826—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape
    • 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
    • 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
    • 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
    • G11B5/538—Disposition or mounting of pole pieces on rotating support
    • 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)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Magnetic Heads (AREA)

Abstract

1,239,918. Magnetic recording. J. LAUDER. 25 July, 1968 [25 July, 1967], No. 34089/67. Heading G5R. A magnetic recording medium, e.g. tape or disc, is driven through a gap between two polepieces of a recording and/or playback head which polepieces are relatively movable so as to produce a minimum air gap which moves transversely of the direction of travel of the record and in a direction different to the relative velocity of the polepieces. A video tape having transverse tracks may thus be transduced and edited. In Fig. 1 a motor 2 drives a rotor 1 having oblique, inset magnetic polepieces 5, Fig. 4, and co-operating with a single, axial polepiece forming part of a magnetic core structure 3 having a record/playback winding 4 and a monitoring winding 9 on the same core or on a separate structure 8. For editing, a magnetic clutch 12 is energized to couple a trunnion 10 supporting the core structure to the motor and thereby drive the structure in a direction opposite to the tape (which may however be stationary) until it abuts a stop which may incorporate a switch to de-energize the clutch, a spring 11 returning the structure to its normal position. In a modification three sets of polepieces are provided in the rotor periphery to define three tracks, handling different frequency ranges, and in others the magnetic inserts 5 are positioned at the edge of the circular face of the rotor, or on the periphery of a rotor of truncated conical shape and may be radial, oblique or helical and have concave operative surfaces, whilst the record path may be other than tangential to the rotor. Insert construction.-The tip of a polepiece in section across a groove containing it is shown in Fig. 19 in which 20 is a copper or brass casing, 21 is magnetic foil, 22 a protective plastics or other layer, 23 is ferrite, 24 is a copper or other covering, and 25 a filler material. The inserts are retained in the rotor against centrifugal force by ferrite and non-magnetic rings with screening material in between and on each side of the stationary pole tips.
GB3408967A 1967-07-25 1967-07-25 Magnetic recording Expired GB1239918A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3408967A GB1239918A (en) 1967-07-25 1967-07-25 Magnetic recording
NL7109812A NL7109812A (en) 1967-07-25 1971-07-16
DE19712135865 DE2135865A1 (en) 1967-07-25 1971-07-17 MAGNETIC RECORDING OR PLAYBACK DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3408967A GB1239918A (en) 1967-07-25 1967-07-25 Magnetic recording

Publications (1)

Publication Number Publication Date
GB1239918A true GB1239918A (en) 1971-07-21

Family

ID=10361242

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3408967A Expired GB1239918A (en) 1967-07-25 1967-07-25 Magnetic recording

Country Status (3)

Country Link
DE (1) DE2135865A1 (en)
GB (1) GB1239918A (en)
NL (1) NL7109812A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0110365A2 (en) * 1982-11-29 1984-06-13 Olympus Optical Co., Ltd. Video tape recorder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2510289A1 (en) * 1981-07-24 1983-01-28 Thomson Csf Rotating head assembly for video tape recorder - uses layers of strong and weak magnetic effect to modify reluctance and direct field through tape
FR2585495B1 (en) * 1985-07-26 1989-10-20 Thomson Csf MAGNETIC RECORDING DEVICE WITH ROTATING HEAD

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0110365A2 (en) * 1982-11-29 1984-06-13 Olympus Optical Co., Ltd. Video tape recorder
EP0110365A3 (en) * 1982-11-29 1985-06-19 Olympus Optical Co., Ltd. Video tape recorder
US4642711A (en) * 1982-11-29 1987-02-10 Olympus Optical Co., Ltd. Video tape recorder including vertical recording heads

Also Published As

Publication number Publication date
NL7109812A (en) 1973-01-18
DE2135865A1 (en) 1973-02-08

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