GB602427A - Improvements in and relating to magnetic recording heads - Google Patents

Improvements in and relating to magnetic recording heads

Info

Publication number
GB602427A
GB602427A GB28082/45A GB2808245A GB602427A GB 602427 A GB602427 A GB 602427A GB 28082/45 A GB28082/45 A GB 28082/45A GB 2808245 A GB2808245 A GB 2808245A GB 602427 A GB602427 A GB 602427A
Authority
GB
United Kingdom
Prior art keywords
core
winding
equal
magnetic recording
recording
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
GB28082/45A
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 Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB602427A publication Critical patent/GB602427A/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
    • G11B5/11—Shielding of head against electric or magnetic fields
    • 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

Landscapes

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

Abstract

602,427. Magnetic recording heads. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 24, 1945, No. 28082. Convention date, Nov. 2, 1944. [Class 40 (ii)] In a recording and reproducing head for steel wire, the winding and the core are divided, the winding portions being proportioned and connected, and the core-pieces adjusted, so that the net voltage induced in the winding by stray magnetic fields traversing the core is substantially zero. Fig. 2 shows one form of construction in which the winding is wound in equal amounts 13, 14, but in contrary directions, on semicircular core-elements 7, 8. Under such conditions, speech currents in the coils produce opposite polarities in the confronting polepieces 11, 12, as is required for magnetic recording, while at the same time components of stray magnetic fields traversing the core at right angles to the recording medium 5 induce in the two halves 13, 14 of the winding equal and opposite voltages, the resultant effect of which is zero. Similarly, components of fields parallel to the medium 5 produce equal and opposite voltages in the two half windings 13, 14, provided that the reluctances of the gaps 9 and 10 are equal, adjustable magnetic shunts 15 being provided for this purpose. Other constructions are described with reference to Figs. 3 to 7 inclusive (not shown), while Figs. 8 to 10 inclusive (not shown) illustrate modifications of a design for use with steel tape, where transverse, longitudinal and edgeways modulation is used.
GB28082/45A 1944-11-02 1945-10-24 Improvements in and relating to magnetic recording heads Expired GB602427A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US561559A US2483123A (en) 1944-11-02 1944-11-02 Humbucking arrangement for magnetic transducers

Publications (1)

Publication Number Publication Date
GB602427A true GB602427A (en) 1948-05-26

Family

ID=24242481

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28082/45A Expired GB602427A (en) 1944-11-02 1945-10-24 Improvements in and relating to magnetic recording heads

Country Status (2)

Country Link
US (1) US2483123A (en)
GB (1) GB602427A (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069395B (en) * 1959-11-19
US2584984A (en) * 1947-11-22 1952-02-12 Armour Res Found Compensating device for a magnetic recording-reproducing head
US2633504A (en) * 1948-01-08 1953-03-31 Gasaccumulator Svenska Ab Combined record-erase head for magnetic recorders
US2561365A (en) * 1948-05-06 1951-07-24 Magnetic Equipment Inc Magnetic recording head, including a device for adjusting the gap width
US2655561A (en) * 1948-08-09 1953-10-13 Lawrence H Connell Apparatus for magnetic recording
US2747027A (en) * 1948-11-05 1956-05-22 Armour Res Found Recording apparatus and method for making duplicate magnetic records
US2745905A (en) * 1949-01-14 1956-05-15 Int Electronics Co Magnetic head assembly
US2678970A (en) * 1949-05-28 1954-05-18 Rca Corp Device for controlling a stray magnetic flux in magnetic sound translating devices
US2662120A (en) * 1950-02-18 1953-12-08 Bell Telephone Labor Inc Magnetic head
DE883663C (en) * 1951-03-22 1953-07-20 Licentia Gmbh Device for magnetic recording or recording and reproducing sound vibrations
US2786897A (en) * 1951-04-19 1957-03-26 Siemens Ag Magnetic recorder
DE883810C (en) * 1951-04-29 1953-07-20 Hans Dr Schiesser Device for low-noise recording of magnetograms
US2767253A (en) * 1952-02-01 1956-10-16 Armour Res Found Compensating device for a magnetic recording-reproducing head
US2850581A (en) * 1954-01-11 1958-09-02 Gen Dynamics Corp Combination recording head
US2969529A (en) * 1957-05-17 1961-01-24 Burroughs Corp Magnetic read-write head having two gaps
US2992369A (en) * 1957-12-20 1961-07-11 Continental Can Co Electric sensing device
US3313889A (en) * 1961-06-12 1967-04-11 Machinski Edward Magnetic head with thin edge pole pieces
US3651282A (en) * 1969-06-19 1972-03-21 Martin E Gerry Distortionless magnetic components
JPS517047B1 (en) * 1970-03-10 1976-03-04
US4008493A (en) * 1975-07-11 1977-02-15 Pizzuto John N Magnetic head structure with minimum feedthrough

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2351003A (en) * 1940-09-11 1944-06-13 Armour Res Found Recording and reproducing of vibrations
US2351004A (en) * 1941-12-22 1944-06-13 Armour Res Found Method and means of magnetic recording

Also Published As

Publication number Publication date
US2483123A (en) 1949-09-27

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