GB501692A - Improvements in and relating to radio receiving apparatus - Google Patents
Improvements in and relating to radio receiving apparatusInfo
- Publication number
- GB501692A GB501692A GB455838A GB455838A GB501692A GB 501692 A GB501692 A GB 501692A GB 455838 A GB455838 A GB 455838A GB 455838 A GB455838 A GB 455838A GB 501692 A GB501692 A GB 501692A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tuning
- button
- oscillator
- push
- receiver
- 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
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
Landscapes
- Structure Of Receivers (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Transmitters (AREA)
Abstract
501,692. Adjusting wireless apparatus. BROWN, W. J. Feb. 14, 1938, No. 4558. [Class 37] [Also in Group XL] A wireless receiver having push-button tuning to each of a plurality of selected wave-, lengths, is provided with additional. pushbuttons which enable manual tuning control to be effected on each of several wavebands. Figs. 1 and 2 show respectively the radio frequency and the oscillator tuning circuits of a superheterodyne receiver, in which pushbuttons simultaneously operate contacts 4a, 4b or 5a, 5b &c. to fix-tune the receiver to the desired predetermined wavelength. In Fig. 1, semi-fixed condensers C2 ... C8 are switched selectively across the long wave coil L3, medium band coil L2 and short wave coil L1, while in the oscillator circuit inductances VL10 ... VL16 of variable permeability type are connected across condenser C16 or C17. The push button switches 1a, 2a, 3a, switch the coils L1, L2, L3, in parallel with one section VC1 of a ganged tuning condenser assembly for manual tuning on three wave bands, the corresponding switches 1b, 2b, 3b, of the oscillator connecting - inductances L6, L7, L8 across the other section VC2 of the variable condenser together with padding condensers C9 ... C14. A further push-button may be provided to change from radio reception to gramophone reproduction by cutting out the radio frequency circuits and connecting the pick-up in any suitable manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB455838A GB501692A (en) | 1938-02-14 | 1938-02-14 | Improvements in and relating to radio receiving apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB455838A GB501692A (en) | 1938-02-14 | 1938-02-14 | Improvements in and relating to radio receiving apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB501692A true GB501692A (en) | 1939-03-03 |
Family
ID=9779417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB455838A Expired GB501692A (en) | 1938-02-14 | 1938-02-14 | Improvements in and relating to radio receiving apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB501692A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2623995A (en) * | 1949-10-28 | 1952-12-30 | Gialluly Elie Marcel Scemam De | Multirange tuning circuit |
-
1938
- 1938-02-14 GB GB455838A patent/GB501692A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2623995A (en) * | 1949-10-28 | 1952-12-30 | Gialluly Elie Marcel Scemam De | Multirange tuning circuit |
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