GB709655A - Improvements in or relating to a magnetic reproducing device including a coil - Google Patents
Improvements in or relating to a magnetic reproducing device including a coilInfo
- Publication number
- GB709655A GB709655A GB24566/51A GB2456651A GB709655A GB 709655 A GB709655 A GB 709655A GB 24566/51 A GB24566/51 A GB 24566/51A GB 2456651 A GB2456651 A GB 2456651A GB 709655 A GB709655 A GB 709655A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- windings
- tape
- reluctance
- fed
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/335—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only with saturated jig, e.g. for detecting second harmonic; balanced flux 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
709,655. Magnetometers. INTERNATIONAL BUSINESS MACHINES CORPORATION. Oct. 22, 1951, [Dec. 29, 1950.] No. 24566/51. Class 37. A magnetometer,. particularly adapted to indicating the intensity of magnetization of a small area on a tape T, Fig. 1, comprises a core J, H, F having a gap G in which the area under test is located, the reluctance of the core being varied by A.C. applied to windings YZ, on a second core broken at GT to receive portion H of the first core. The output in windings XW is fed through an appropriate filter to pass induced voltages of twice the frequency of that supplying coils Y, Z, whose amplitudes are proportional to the field at G due to the tape T. In a modification, Fig. 2, the tape is placed at the gap G and the windings AB are fed with A.C. to vary the reluctance of the magnetic circuit including limbs L, M and thus produce in coils CD voltages of doubled frequency and whose amplitude is related to the field at G.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US709655XA | 1950-12-29 | 1950-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB709655A true GB709655A (en) | 1954-06-02 |
Family
ID=22098428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24566/51A Expired GB709655A (en) | 1950-12-29 | 1951-10-22 | Improvements in or relating to a magnetic reproducing device including a coil |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1061712A (en) |
| GB (1) | GB709655A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2966666A (en) * | 1954-04-30 | 1960-12-27 | Electronique & Automatisme Sa | Magnetic record and/or playback heads and control arrangement therefor |
-
1951
- 1951-10-22 GB GB24566/51A patent/GB709655A/en not_active Expired
- 1951-12-19 FR FR1061712D patent/FR1061712A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1061712A (en) | 1954-04-14 |
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