GB560236A - Improvements in variable inductances - Google Patents
Improvements in variable inductancesInfo
- Publication number
- GB560236A GB560236A GB1340442A GB1340442A GB560236A GB 560236 A GB560236 A GB 560236A GB 1340442 A GB1340442 A GB 1340442A GB 1340442 A GB1340442 A GB 1340442A GB 560236 A GB560236 A GB 560236A
- Authority
- GB
- United Kingdom
- Prior art keywords
- auxiliary coil
- inductance
- main coils
- coils
- series
- 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
- H01F21/005—Inductances without magnetic core
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnets (AREA)
Abstract
560,236. Inductances. MULLARD RADIO VALVE CO., Ltd., and CLARK, R. G. Sept. 23, 1942, No. 13404. [Class 38 (ii)] In a variable inductance comprising two series-connected coils L1, L2 slidable one within the other, the minimum value of inductance is decreased by an auxiliary coil so arranged as to be closely coupled with one of the main coils only when the latter have been moved to the position in which their mutual inductance is a minimum. An auxiliary coil which may be in the form of a short-circuited turn (e.g. a copper cylinder) S1 or S2, Fig. 1, may be associated with each of the main coils L1, L2. Alternatively, the auxiliary coil may be a winding L3, Fig. 5, connected in series or parallel with one of the main coils and magnetically opposed thereto, 'the movable element L1 of the main coils becoming closely coupled with the auxiliary coil when it is moved away from the other element to reduce the inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1340442A GB560236A (en) | 1942-09-23 | 1942-09-23 | Improvements in variable inductances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1340442A GB560236A (en) | 1942-09-23 | 1942-09-23 | Improvements in variable inductances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB560236A true GB560236A (en) | 1944-03-27 |
Family
ID=10022339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1340442A Expired GB560236A (en) | 1942-09-23 | 1942-09-23 | Improvements in variable inductances |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB560236A (en) |
-
1942
- 1942-09-23 GB GB1340442A patent/GB560236A/en not_active Expired
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