GB441982A - Improvements in or relating to variable inductance coils - Google Patents
Improvements in or relating to variable inductance coilsInfo
- Publication number
- GB441982A GB441982A GB2163735A GB2163735A GB441982A GB 441982 A GB441982 A GB 441982A GB 2163735 A GB2163735 A GB 2163735A GB 2163735 A GB2163735 A GB 2163735A GB 441982 A GB441982 A GB 441982A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- inductance
- ferro
- variable inductance
- plunger
- 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
- H01F21/065—Measures for obtaining a desired relation between the position of the core and the inductance
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
441,982. Inductances. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London.- (Telefunken Ges. f³r drahtlose Telegraphie; 12, Hallesches Ufer, Berlin) July 30, 1935, No. 21637. [Class 37] A ferro-magnetically cored variable inductance coil for use in radio and similar circuits is provided with a suppfementary member of ferro-magnetic material for enabling the law of variation of inductance of the coil to be adjusted after manufacture, said supplementary member being additional to the means provided for varying the inductance of the coil when in use, and being adapted to be moved in position until the required law is obtained, its position in the assembly being then fixed. In the form shown, the inductance of the coil 1 is varied in use by moving in and out a ferro-magnetic plunger 3, and the supplementary member 4 is of elongated form and arranged with its length parallel to the direction of movement of the plunger.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2163735A GB441982A (en) | 1935-07-30 | 1935-07-30 | Improvements in or relating to variable inductance coils |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2163735A GB441982A (en) | 1935-07-30 | 1935-07-30 | Improvements in or relating to variable inductance coils |
Publications (1)
Publication Number | Publication Date |
---|---|
GB441982A true GB441982A (en) | 1936-01-30 |
Family
ID=10166283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2163735A Expired GB441982A (en) | 1935-07-30 | 1935-07-30 | Improvements in or relating to variable inductance coils |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB441982A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2423824A (en) * | 1943-04-10 | 1947-07-15 | Collins Radio Co | Inductive tuning |
US2572455A (en) * | 1949-10-22 | 1951-10-23 | Ulysses S Dunn | Transformer |
US2642559A (en) * | 1948-12-11 | 1953-06-16 | Hartford Nat Bank & Trust Co | Inductance coil of the sliding core type |
DE977465C (en) * | 1948-11-20 | 1966-07-14 | Philips Nv | Dual-circuit band filter |
-
1935
- 1935-07-30 GB GB2163735A patent/GB441982A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2423824A (en) * | 1943-04-10 | 1947-07-15 | Collins Radio Co | Inductive tuning |
DE977465C (en) * | 1948-11-20 | 1966-07-14 | Philips Nv | Dual-circuit band filter |
US2642559A (en) * | 1948-12-11 | 1953-06-16 | Hartford Nat Bank & Trust Co | Inductance coil of the sliding core type |
US2572455A (en) * | 1949-10-22 | 1951-10-23 | Ulysses S Dunn | Transformer |
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