GB706267A - Improvements in and relating to magnetic recording or reproducing apparatus - Google Patents

Improvements in and relating to magnetic recording or reproducing apparatus

Info

Publication number
GB706267A
GB706267A GB2444651A GB2444651A GB706267A GB 706267 A GB706267 A GB 706267A GB 2444651 A GB2444651 A GB 2444651A GB 2444651 A GB2444651 A GB 2444651A GB 706267 A GB706267 A GB 706267A
Authority
GB
United Kingdom
Prior art keywords
magnetic recording
reproducing apparatus
contact area
relating
length
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
GB2444651A
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.)
BRITISH FERROGRAPH RECORDER CO
ERNEST HILTON NIBLETT
Original Assignee
BRITISH FERROGRAPH RECORDER CO
ERNEST HILTON NIBLETT
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 BRITISH FERROGRAPH RECORDER CO, ERNEST HILTON NIBLETT filed Critical BRITISH FERROGRAPH RECORDER CO
Priority to GB2444651A priority Critical patent/GB706267A/en
Priority to FR1054084D priority patent/FR1054084A/en
Publication of GB706267A publication Critical patent/GB706267A/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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • 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
    • G11B2005/0002—Special dispositions or recording techniques

Landscapes

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

Abstract

706,267. Magnetic recording and reproducing apparatus. BRITISH FERROGRAPH RECORDER CO., Ltd., and NIBLETT, E. H. July 16, 1952 [Oct. 19, 1951], No. 24446/51. Class 40(2). In a magnetic recording or reproducing head the effective length of the contact area 13 of the pole pieces 10, 11, in the direction of motion of the record carrier, varies across the width of the air gap 12 for the purpose of preventing the attenuation of low frequencies when the contact length of a pole-piece is commensurate with wave length. In a preferred embodiment, the contact area is approximately triangular and symmetrical. When recording two parallel tracks on carrier, the apex of the triangle is directed towards the centre of the record carrier, as shown in Fig. 4, whereby crosstalk between the two tracks is prevented or reduced. Specification 691,903 is referred to. Reference has been directed by the Comptroller to Specification 683,797.
GB2444651A 1951-10-19 1951-10-19 Improvements in and relating to magnetic recording or reproducing apparatus Expired GB706267A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2444651A GB706267A (en) 1951-10-19 1951-10-19 Improvements in and relating to magnetic recording or reproducing apparatus
FR1054084D FR1054084A (en) 1951-10-19 1951-11-08 Improvements to magnetic recording devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2444651A GB706267A (en) 1951-10-19 1951-10-19 Improvements in and relating to magnetic recording or reproducing apparatus

Publications (1)

Publication Number Publication Date
GB706267A true GB706267A (en) 1954-03-24

Family

ID=10211838

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2444651A Expired GB706267A (en) 1951-10-19 1951-10-19 Improvements in and relating to magnetic recording or reproducing apparatus

Country Status (2)

Country Link
FR (1) FR1054084A (en)
GB (1) GB706267A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866011A (en) * 1954-07-13 1958-12-23 Clevite Corp Magnetic transducer head
US3582918A (en) * 1968-01-12 1971-06-01 Gen Electric Magnetic head with dissimilar pole pieces
JPS49104628U (en) * 1972-12-27 1974-09-07
FR2384314A1 (en) * 1977-03-15 1978-10-13 Yasinavichjus Rimvidas MAGNETIC HEAD AND METHOD FOR MANUFACTURING THE SAID HEAD
EP0356126A2 (en) * 1988-08-17 1990-02-28 Quantum Corporation Recording head to minimize undershoots in readback pulses

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2866011A (en) * 1954-07-13 1958-12-23 Clevite Corp Magnetic transducer head
US3582918A (en) * 1968-01-12 1971-06-01 Gen Electric Magnetic head with dissimilar pole pieces
JPS49104628U (en) * 1972-12-27 1974-09-07
FR2384314A1 (en) * 1977-03-15 1978-10-13 Yasinavichjus Rimvidas MAGNETIC HEAD AND METHOD FOR MANUFACTURING THE SAID HEAD
EP0356126A2 (en) * 1988-08-17 1990-02-28 Quantum Corporation Recording head to minimize undershoots in readback pulses
EP0356126A3 (en) * 1988-08-17 1991-11-21 Quantum Corporation Recording head to minimize undershoots in readback pulses

Also Published As

Publication number Publication date
FR1054084A (en) 1954-02-08

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