GB602427A - Improvements in and relating to magnetic recording heads - Google Patents
Improvements in and relating to magnetic recording headsInfo
- 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
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.
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)
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)
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 |
-
1944
- 1944-11-02 US US561559A patent/US2483123A/en not_active Expired - Lifetime
-
1945
- 1945-10-24 GB GB28082/45A patent/GB602427A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2483123A (en) | 1949-09-27 |
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