GB402483A - Improvements in electric coils - Google Patents
Improvements in electric coilsInfo
- Publication number
- GB402483A GB402483A GB1646832A GB1646832A GB402483A GB 402483 A GB402483 A GB 402483A GB 1646832 A GB1646832 A GB 1646832A GB 1646832 A GB1646832 A GB 1646832A GB 402483 A GB402483 A GB 402483A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- shield
- windings
- magnetic
- core
- 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
- 238000004804 winding Methods 0.000 abstract 4
- 230000004907 flux Effects 0.000 abstract 3
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 239000000428 dust Substances 0.000 abstract 1
- 239000000696 magnetic material Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
- H01F17/08—Loading coils for telecommunication circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
402,483. Inductances. BLUMLEIN, A. D., 7, Courtfield Gardens, West Ealing, London. June 10, 1932, No. 16468. [Class 37.] An inductance or loading coil comprising one or more windings surrounded by magnetic material forming the main magnetic circuit is further surrounded substantially completely by a shield so arranged that for low frequencies the ratio of forward path reluctance to return path reluctance is greater for lines of flux further removed from the coil windings. The term forward path is taken as extending through the centre of the coil to points such that the line of flux turns outward at an angle of say 45‹ to the coil axis. In the example, Fig. 1, the main magnetic path lies through a core 2, 3 of compressed magnetic dust. An outer surrounding shield 4 is of higher permeability and an air gap as shown lies in the forward path of the lines of flux further from the coil windings. In modifications two shields are described and the outer edges of one shield may be integral with the main core. In the modification, Fig. 4, the shield is formed by crossed windings 21, 22 of magnetic wire or tape and the air gap is formed by dishing inwards the main magnetic core 17, 18. These coils are rectangular in outer form and are adapted for assembly with others in containers 26, 27 of sheet metal,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1646832A GB402483A (en) | 1932-06-10 | 1932-06-10 | Improvements in electric coils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1646832A GB402483A (en) | 1932-06-10 | 1932-06-10 | Improvements in electric coils |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB402483A true GB402483A (en) | 1933-12-07 |
Family
ID=10077877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1646832A Expired GB402483A (en) | 1932-06-10 | 1932-06-10 | Improvements in electric coils |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB402483A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1003293B (en) * | 1952-06-25 | 1957-02-28 | Siemens Ag | Pot core for coils in communications technology, especially high frequency technology |
| DE1046796B (en) * | 1956-11-02 | 1958-12-18 | Siemens Ag | Magnetic core for coils |
| CN118866492A (en) * | 2024-09-26 | 2024-10-29 | 浙江大华技术股份有限公司 | Composite magnetic material and its preparation method and application |
-
1932
- 1932-06-10 GB GB1646832A patent/GB402483A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1003293B (en) * | 1952-06-25 | 1957-02-28 | Siemens Ag | Pot core for coils in communications technology, especially high frequency technology |
| DE1046796B (en) * | 1956-11-02 | 1958-12-18 | Siemens Ag | Magnetic core for coils |
| CN118866492A (en) * | 2024-09-26 | 2024-10-29 | 浙江大华技术股份有限公司 | Composite magnetic material and its preparation method and application |
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