GB763497A - Improvements in or relating to variable inductance devices - Google Patents
Improvements in or relating to variable inductance devicesInfo
- Publication number
- GB763497A GB763497A GB1151754A GB1151754A GB763497A GB 763497 A GB763497 A GB 763497A GB 1151754 A GB1151754 A GB 1151754A GB 1151754 A GB1151754 A GB 1151754A GB 763497 A GB763497 A GB 763497A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- coils
- flux
- magnetic circuit
- magnetic
- 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
- H01F21/08—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by varying the permeability of the core, e.g. by varying magnetic bias
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
763,497. Inductors. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 18, 1955 [April 21, 1954], No. 11517/54. Class 38 (2). A variable inductor comprises one or more coils 13, disposed in a magnetic circuit member 4 which also includes a permanent magnet 1 and an element, which may be the magnet, which is movable to vary the density of flux in the magnetic circuit. The magnet is mounted on a spindle 5 which is pressed by a spring 11 compressed between the magnet 1 and a brass strip 10 against a bearing member 8 in a brass strip 9. The strips 8, 9 join the two ends 2, 3 of member 4 between which the magnet 1 lies. A magnetic screen 12 surrounding magnet 1 provides a path for the leakage flux when the magnet is rotated from the position shown of minimum inductance. The coils 13 are flattened toroids surrounding cylindrical ferrite cores. To avoid the need for screen 12, ends 2, 3 may surround the magnet, Fig. 4 (not shown). In a modification, the magnet 1 is stationary and the movable element is a magnetic member which rotates between a position in which it completes the magnetic circuit through the coils and a position in which the flux is diverted to a shunt path, Fig. 5 (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1151754A GB763497A (en) | 1954-04-21 | 1954-04-21 | Improvements in or relating to variable inductance devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1151754A GB763497A (en) | 1954-04-21 | 1954-04-21 | Improvements in or relating to variable inductance devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB763497A true GB763497A (en) | 1956-12-12 |
Family
ID=9987701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1151754A Expired GB763497A (en) | 1954-04-21 | 1954-04-21 | Improvements in or relating to variable inductance devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB763497A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1148283B (en) * | 1958-10-28 | 1963-05-09 | Tno | Modulator controllable by means of pre-magnetization |
| US3735305A (en) * | 1972-09-20 | 1973-05-22 | Us Air Force | High power electrically variable inductor |
-
1954
- 1954-04-21 GB GB1151754A patent/GB763497A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1148283B (en) * | 1958-10-28 | 1963-05-09 | Tno | Modulator controllable by means of pre-magnetization |
| US3735305A (en) * | 1972-09-20 | 1973-05-22 | Us Air Force | High power electrically variable inductor |
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