GB451301A - Improvements in tuning coil arrangements for radio receivers - Google Patents
Improvements in tuning coil arrangements for radio receiversInfo
- Publication number
- GB451301A GB451301A GB12509/35A GB1250935A GB451301A GB 451301 A GB451301 A GB 451301A GB 12509/35 A GB12509/35 A GB 12509/35A GB 1250935 A GB1250935 A GB 1250935A GB 451301 A GB451301 A GB 451301A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lead
- coils
- wave
- switch
- wire
- 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
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
- H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
- H03H2/008—Receiver or amplifier input circuits
Landscapes
- Circuits Of Receivers In General (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
451,301. Wireless receiving systems. COLE, Ltd., E. K., Priory Crescent, Southendon-Sea, and BRADFIELD, G., 34, St. Benets Road, Prittlewell. Essex. April 26, 1935, No. 12509. [Class 40 (v)] An input filter for a radio receiver comprises two coupled tuned circuits A, E1, E2, W3 and B, C, D, W4, Fig. 1, forming a bandpass filter with wave-band switching S3. Associated with the medium-wave windings E1, E2, are a pair of bifilar wound coils F1, F2 which in the medium wave position T of the switch T, T1, are connected respectively to the aerial Y through its lead-in wire L2 and to a twin auxiliary lead-in wire L1 so that interference picked up on the wires L1, L2 is balanced out. The effect of the lead L1 can be cut out by opening switch S2 and closing switch S1 to earth said lead. In the long wave position T1 the input coils A1, A2, coupled to the long wave coil A, are associated with the aerial system. The coils may be all disposed on a single former, Fig. 2, the coils E1, E2, and C, D being mutually adjustable to obtain the required inductance. Alternatively a movable iron core may be provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US477304XA | 1935-04-26 | 1935-04-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB451301A true GB451301A (en) | 1936-08-04 |
Family
ID=21950615
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12509/35A Expired GB451301A (en) | 1935-04-26 | 1935-04-26 | Improvements in tuning coil arrangements for radio receivers |
| GB8271/36A Expired GB477304A (en) | 1935-04-26 | 1936-03-19 | Improvements in tunable high-frequency electric coupling circuits |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8271/36A Expired GB477304A (en) | 1935-04-26 | 1936-03-19 | Improvements in tunable high-frequency electric coupling circuits |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE415202A (en) |
| FR (1) | FR805686A (en) |
| GB (2) | GB451301A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1174852B (en) * | 1960-01-16 | 1964-07-30 | Tesla Np | Circuit arrangement for the adapted connection of a butterfly circle in the decimeter range |
-
0
- BE BE415202D patent/BE415202A/xx unknown
-
1935
- 1935-04-26 GB GB12509/35A patent/GB451301A/en not_active Expired
-
1936
- 1936-03-19 GB GB8271/36A patent/GB477304A/en not_active Expired
- 1936-04-24 FR FR805686D patent/FR805686A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB477304A (en) | 1937-12-23 |
| FR805686A (en) | 1936-11-26 |
| BE415202A (en) |
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