GB783283A - Improvements in or relating to magnetic transducing heads for use in magnetic recording or reproducing apparatus - Google Patents

Improvements in or relating to magnetic transducing heads for use in magnetic recording or reproducing apparatus

Info

Publication number
GB783283A
GB783283A GB2438954A GB2438954A GB783283A GB 783283 A GB783283 A GB 783283A GB 2438954 A GB2438954 A GB 2438954A GB 2438954 A GB2438954 A GB 2438954A GB 783283 A GB783283 A GB 783283A
Authority
GB
United Kingdom
Prior art keywords
magnetic
pole portions
magnetic recording
reproducing apparatus
head
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
GB2438954A
Inventor
Michael Blackmore Martin
William David Brunt
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 GB2438954A priority Critical patent/GB783283A/en
Publication of GB783283A publication Critical patent/GB783283A/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
    • G11B5/10—Structure or manufacture of housings or shields for heads
    • 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
    • G11B5/193—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features the pole pieces being ferrite or other magnetic particles

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)

Abstract

783,283. Magnetic transducing heads. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Aug. 18, 1955 [Aug. 21, 1954], No. 24389/54. Class 40 (2). A magnetic recording, reproducing or erasing head for a magnetic recording or reproducing apparatus comprises a magnetic core 1, 2 having a pair of pole portions 3, 4 defining a non-magnetic gap therebetween and a preformed non- magnetic grooved member 13 embraced by the pole portions in such manner that the latter are disposed in the groove 16 of the member 13, the front surfaces of the pole portions and of the member forming a smooth substantially continuous surface. As shown, a non-magnetic spacer 7 may be disposed in the gap, a winding 10 on a former 11 surrounds rear ends 8 and 9 of the core members, the said continuous surface which is ground or honed is arranged to project through cut-out in a screening can 19 free space in the can being filled with an epoxy resin, and lead wires 22 pass out through a, bush 21. A retainer 24 engaged by a screw 25 secures the head unit in the can 19. The core members 1, 2 may comprise stacks of laminations or, preferably, a hard magnetic ferrite material, and may have similar wear-resisting properties to those of the groove forming portions 14, 15, which may be of ceramic material, of the member 13. The head is applicable to one track of a twin track tape.
GB2438954A 1954-08-21 1954-08-21 Improvements in or relating to magnetic transducing heads for use in magnetic recording or reproducing apparatus Expired GB783283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2438954A GB783283A (en) 1954-08-21 1954-08-21 Improvements in or relating to magnetic transducing heads for use in magnetic recording or reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2438954A GB783283A (en) 1954-08-21 1954-08-21 Improvements in or relating to magnetic transducing heads for use in magnetic recording or reproducing apparatus

Publications (1)

Publication Number Publication Date
GB783283A true GB783283A (en) 1957-09-18

Family

ID=10210976

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2438954A Expired GB783283A (en) 1954-08-21 1954-08-21 Improvements in or relating to magnetic transducing heads for use in magnetic recording or reproducing apparatus

Country Status (1)

Country Link
GB (1) GB783283A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093104B (en) * 1957-11-14 1960-11-17 Carl Schneider K G Magnetic heads and their assembly method
DE1213000B (en) * 1959-01-28 1966-03-24 Steidinger Geb Method of manufacturing a magnetic head

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093104B (en) * 1957-11-14 1960-11-17 Carl Schneider K G Magnetic heads and their assembly method
DE1213000B (en) * 1959-01-28 1966-03-24 Steidinger Geb Method of manufacturing a magnetic head

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