GB559718A - Improvements in or relating to variable inductance devices for tuning high frequency electric circuits - Google Patents
Improvements in or relating to variable inductance devices for tuning high frequency electric circuitsInfo
- Publication number
- GB559718A GB559718A GB12118/42D GB1211842D GB559718A GB 559718 A GB559718 A GB 559718A GB 12118/42 D GB12118/42 D GB 12118/42D GB 1211842 D GB1211842 D GB 1211842D GB 559718 A GB559718 A GB 559718A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- relating
- high frequency
- frequency electric
- electric circuits
- 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
Abstract
559,718. Inductances. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Aug. 28, 1942, No. 12118. Convention date, July 30, 1941. [Class 38 (ii)] In a device for tuning oscillatory circuits and comprising a coil 1 the inductance of which is varied by movement of a magnetic dust core 6, the latter is provided with electrically conducting elements 7 on its surface so that increase of inductance by insertion of the core within the coil is accompanied by increase in the natural capacity of the coil, thereby extending the tuning range. A small variable condenser 3 may be connected across the coil for fine adjustment, and the effect of the inter-electrode capacity of the associated valve on the capacity of the circuit may be reduced by connecting the grid 4 to an intermediate point on the coil or to the junction of a pair of condensers connected in series across the coil. Specification 474,711 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US559718XA | 1941-07-30 | 1941-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB559718A true GB559718A (en) | 1944-03-02 |
Family
ID=22001305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12118/42D Expired GB559718A (en) | 1941-07-30 | 1942-08-28 | Improvements in or relating to variable inductance devices for tuning high frequency electric circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB559718A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2598810A (en) * | 1950-08-04 | 1952-06-03 | Aladdin Ind Inc | Wide range high-frequency tuner |
-
1942
- 1942-08-28 GB GB12118/42D patent/GB559718A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2598810A (en) * | 1950-08-04 | 1952-06-03 | Aladdin Ind Inc | Wide range high-frequency tuner |
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