GB744234A - Dust-core for the coils of electrical communication circuits - Google Patents
Dust-core for the coils of electrical communication circuitsInfo
- Publication number
- GB744234A GB744234A GB27132/51A GB2713251A GB744234A GB 744234 A GB744234 A GB 744234A GB 27132/51 A GB27132/51 A GB 27132/51A GB 2713251 A GB2713251 A GB 2713251A GB 744234 A GB744234 A GB 744234A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ferrite
- sintered ferrite
- sintered
- core
- compressed
- 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
- 229910000859 α-Fe Inorganic materials 0.000 abstract 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 6
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 239000000843 powder Substances 0.000 abstract 2
- 238000004026 adhesive bonding Methods 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 229920002457 flexible plastic Polymers 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 238000012216 screening Methods 0.000 abstract 1
- 238000009757 thermoplastic moulding Methods 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
- H01F17/043—Fixed inductances of the signal type with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Soft Magnetic Materials (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
744,234. Inductors. KASCHKE, K., and VOGT, H. Nov. 19, 1951 [Nov. 17, 1950 ; Dec. 16, 1950; Dec. 19, 1950; Jan. 12, 1951 ; Jan. 13, 1951 ; June 14, 1951], No. 27132/51. Class 38 (2). A magnetic core for a telecommunication coil comprises a part passing through the coil made of sintered ferrite and another part or parts made of ferrite powder or iron powder compressed with a binder, or a mixture of such materials. Thus, a reel-shaped core comprises a sintered ferrite stem with end lugs engaging recesses in end discs of compressed iron powder, Fig. 1 (not shown). A pot core comprises a sintered iron cylinder 25 which screws on the plastic coil holder 27 to a selected distance from a sintered ferrite disc 30, a flexible plastic stop ring 31 being provided, Fig. 2. Other cores are described having parts fixed together by thermoplastic moulding, by screws of which the threads are moulded on to layers of sintered ferrite, Fig. 4 (not shown), and by gluing. In a band-pass filter, Fig. 9, two coils 166, 167 with core parts 168, 169 of sintered ferrite, 170, 171, of compressed iron or ferrite powder and 182, 183 movable to vary the inductance, are mounted on supports 172, 173 in threaded engagement with a ring 176. They are moved to and from each other by rotation of the ring by a tool passed through an opening 181 in a screening can 180.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE744234X | 1950-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB744234A true GB744234A (en) | 1956-02-01 |
Family
ID=6648003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27132/51A Expired GB744234A (en) | 1950-12-16 | 1951-11-19 | Dust-core for the coils of electrical communication circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB744234A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3593245A (en) * | 1968-04-18 | 1971-07-13 | Matsushita Electric Ind Co Ltd | Double-tuned intermediate-frequency transformer |
-
1951
- 1951-11-19 GB GB27132/51A patent/GB744234A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3593245A (en) * | 1968-04-18 | 1971-07-13 | Matsushita Electric Ind Co Ltd | Double-tuned intermediate-frequency transformer |
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