GB1192947A - Improvements in or relating to Variable Radio-Frequency Auto-Transformers - Google Patents
Improvements in or relating to Variable Radio-Frequency Auto-TransformersInfo
- Publication number
- GB1192947A GB1192947A GB4915567A GB4915567A GB1192947A GB 1192947 A GB1192947 A GB 1192947A GB 4915567 A GB4915567 A GB 4915567A GB 4915567 A GB4915567 A GB 4915567A GB 1192947 A GB1192947 A GB 1192947A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coils
- main winding
- transformers
- auxiliary
- variable radio
- 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
- H01F21/12—Variable inductances or transformers of the signal type discontinuously variable, e.g. tapped
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
1,192,947. Transformers. MARCONI CO. Ltd. 30 Oct., 1967 [11 Nov., 1966], No. 49155/67. Heading H1T. A variable radio-frequency autotransformer has a bifilar main winding whose ends are connected to terminals T 1 , T 2 through at least two auxiliary coils, a slider contacting the main winding being connected to a third terminal T 3 . In the embodiment of Fig. 1, there are four auxiliary coils A 1 -A 4 . Magnetic coupling may be provided between pairs of these auxiliary coils or between all four coils. Other embodiments utilize only two coils by omitting A 1 and either A 3 or A 4 in Fig. 1. In a final embodiment (Fig. 3, not shown) there are eight coils, two series-connected coils replacing each coil A 1 -A 4 in Fig. 1, four of these coils being magnetically coupled together and the other four being coupled in two separate pairs. One conductor of the bifilar main winding may have one more turn than the other. The slider may move on a linear or arcuate path. The main winding may have a toroidal ferrite core, and the auxiliary coils may have ferrite beads as cores.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU13799/66A AU293034B2 (en) | 1967-05-29 | Variable radiofrequency autotransformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1192947A true GB1192947A (en) | 1970-05-28 |
Family
ID=3704081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4915567A Expired GB1192947A (en) | 1966-11-11 | 1967-10-30 | Improvements in or relating to Variable Radio-Frequency Auto-Transformers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1192947A (en) |
-
1967
- 1967-10-30 GB GB4915567A patent/GB1192947A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |