GB615555A - Adjustment of the magnification factor q of a radio-frequency inductor - Google Patents
Adjustment of the magnification factor q of a radio-frequency inductorInfo
- Publication number
- GB615555A GB615555A GB740246A GB740246A GB615555A GB 615555 A GB615555 A GB 615555A GB 740246 A GB740246 A GB 740246A GB 740246 A GB740246 A GB 740246A GB 615555 A GB615555 A GB 615555A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- coil
- permeability
- inductance
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F21/00—Variable inductances or transformers of the signal type
- H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
- H01F21/06—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by movement of core or part of core relative to the windings as a whole
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
615,555. Inductances. HOLZER, R. C. DE. March 9, 1946, No. 7402. [Class 38 (ii)] The Q value of an inductance having a dust core of permeability between 5 and 50 is decreased by introducing a small mass of ferromagnetic material of high resistivity and permeability between 5000 and 50,000 into a relatively weak part of the magnetic field. A coil 4 is wound on a bush 3 inside which is a magnetic dust core of two parts, a fixed part 2 and a part 1 movable by screw 9 for varying the inductance value. A wire 7 of high permeability is moved by a screw 8 in a groove 6 at one side of core part 2 in which the field strength is relatively small, the value of Q and dynamic resistance of the coil varying, but the inductance remaining substantially the same. The outer casing 5 may be of magnetic or non- magnetic metal. In an alternative construction, Fig. 4, a pair of curved strips 13 of varying width, of high permeability material, move in the leakage field of a coil 10 on a core 12 partially enclosed within a shell 11. Experimental results for coils of stated dimensions are given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB740246A GB615555A (en) | 1946-03-09 | 1946-03-09 | Adjustment of the magnification factor q of a radio-frequency inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB740246A GB615555A (en) | 1946-03-09 | 1946-03-09 | Adjustment of the magnification factor q of a radio-frequency inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB615555A true GB615555A (en) | 1949-01-07 |
Family
ID=9832420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB740246A Expired GB615555A (en) | 1946-03-09 | 1946-03-09 | Adjustment of the magnification factor q of a radio-frequency inductor |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB615555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1048966B (en) * | 1956-03-12 | 1959-01-22 | Siemens Ag | High frequency coil with changeable quality |
-
1946
- 1946-03-09 GB GB740246A patent/GB615555A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1048966B (en) * | 1956-03-12 | 1959-01-22 | Siemens Ag | High frequency coil with changeable quality |
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