GB390348A - Improvements in wireless receiving apparatus - Google Patents
Improvements in wireless receiving apparatusInfo
- Publication number
- GB390348A GB390348A GB1545532A GB1545532A GB390348A GB 390348 A GB390348 A GB 390348A GB 1545532 A GB1545532 A GB 1545532A GB 1545532 A GB1545532 A GB 1545532A GB 390348 A GB390348 A GB 390348A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wave
- short
- windings
- long
- coil
- 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)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
390,348. Inductances. BIDDINGTON, T. A. and FIELD, R., 54, Union Street, Plymouth. May 31, 1932, No. 15455. [Class 37.] A tuning inductance comprises a long, medium, and short waveband coil unit with switch mechanism to connect the coil circuits for each waveband, and means located between the short-wave grid coil and long-wave coils for preventing interaction when the short-wave winding is in use, the long-wave winding being short-circuited as usual when the medium waveband is used. The windings are preferably arranged on a common former, but side-byside or concentric arrangements may be employed. The windings comprise a combined long-wave coil 4, 4a, of which the portion 4a is short-circuited for medium wave work, the winding 5 being the common reaction therefor. The short-wave grid coil 6 is located remote from the windings 4, 4a and its reaction coil 7 is positioned between the windings 4, 5, 6 thus preventing interaction on short-wave working. A portion of the reaction winding 5 may be wound between the coils 4, 6. A metal screen 8 may be interposed between the long and short wave windings. Switches are provided to parallel the short-wave grid and reaction windings with the corresponding long-wave coils, or to short-circuit the long-wave coils and parallel the reaction windings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1545532A GB390348A (en) | 1932-05-31 | 1932-05-31 | Improvements in wireless receiving apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1545532A GB390348A (en) | 1932-05-31 | 1932-05-31 | Improvements in wireless receiving apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB390348A true GB390348A (en) | 1933-04-06 |
Family
ID=10059432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1545532A Expired GB390348A (en) | 1932-05-31 | 1932-05-31 | Improvements in wireless receiving apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB390348A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2553324A (en) * | 1949-07-27 | 1951-05-15 | Gen Electric | Wide band audio and video transformer |
| US2650296A (en) * | 1950-01-16 | 1953-08-25 | Anchor Radio Corp | Radio frequency amplifier |
-
1932
- 1932-05-31 GB GB1545532A patent/GB390348A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2553324A (en) * | 1949-07-27 | 1951-05-15 | Gen Electric | Wide band audio and video transformer |
| US2650296A (en) * | 1950-01-16 | 1953-08-25 | Anchor Radio Corp | Radio frequency amplifier |
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