GB354618A - Improvements in talking heads for electro-magnetic sound recording - Google Patents
Improvements in talking heads for electro-magnetic sound recordingInfo
- Publication number
- GB354618A GB354618A GB3100630A GB3100630A GB354618A GB 354618 A GB354618 A GB 354618A GB 3100630 A GB3100630 A GB 3100630A GB 3100630 A GB3100630 A GB 3100630A GB 354618 A GB354618 A GB 354618A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- recording
- core
- electro
- sound 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Magnetic Heads (AREA)
Abstract
354,618. Electromagnetic sound-recording apparatus. TELEGRAPHIEPATENT-SYNDIKAT GES., 119B, Potsdamerstrasse, Berlin. Oct. 16, 1930, No. 31006. Convention date, Oct. 16, 1929. [Class 40 (ii).] A "talking head" for electromagnetic sound recording on a steel band comprises two magnets a, a<1> arranged on opposite sides of the band b at right-angles to the flat faces of the band and in a staggered position with two oppositely facing sides of the magnet polepieces in alignment. This arrangement is stated to reduce the stray magnetic field to a minimum. The windings of both magnets may be used for the sound-recording current, or each magnet may have two windings, one of which is arranged in the recording circuit and the other used for pre-magnetizing the core. As a further alternative, the winding of one magnet core may be used for the recording current and that of the other magnet for the pre-magnetizing of its core.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET37717D DE585454C (en) | 1929-10-17 | 1929-10-17 | Speech head for recording or scanning speech exchange currents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB354618A true GB354618A (en) | 1931-08-13 |
Family
ID=6289600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3100630A Expired GB354618A (en) | 1929-10-17 | 1930-10-16 | Improvements in talking heads for electro-magnetic sound recording |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE585454C (en) |
| FR (1) | FR703640A (en) |
| GB (1) | GB354618A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE741333C (en) * | 1935-04-07 | 1943-11-10 | Roriphon Elektro Akustische Ap | Talking and listening head for magnetogram carrier |
| DE746040C (en) * | 1941-11-06 | 1944-10-02 | Playback head for magnetic sound machines | |
| DE834910C (en) * | 1950-05-31 | 1952-03-24 | Clemens Riefler Fabrik Mathema | Talking head or erasing head for magnetic sound devices |
-
1929
- 1929-10-17 DE DET37717D patent/DE585454C/en not_active Expired
-
1930
- 1930-10-13 FR FR703640D patent/FR703640A/en not_active Expired
- 1930-10-16 GB GB3100630A patent/GB354618A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR703640A (en) | 1931-05-04 |
| DE585454C (en) | 1933-10-03 |
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