GB524373A - Improvements in radio receivers with pre-set tuning - Google Patents
Improvements in radio receivers with pre-set tuningInfo
- Publication number
- GB524373A GB524373A GB14370/39A GB1437039A GB524373A GB 524373 A GB524373 A GB 524373A GB 14370/39 A GB14370/39 A GB 14370/39A GB 1437039 A GB1437039 A GB 1437039A GB 524373 A GB524373 A GB 524373A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condensers
- fixed
- springs
- switches
- reactances
- 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
- H03J5/26—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 operated by hand
- H03J5/32—Stationary tuning circuits or elements selected by push-button
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
524,373. Wireless receiving sets. PHILIPS LAMPS, Ltd. May 13, 1939, No. 14370. Convention date, May 16, 1938. [Class 40 (v)] In a radio receiver tuned by the selection of pre-set reactances, each pre-set :reactance is made up from an adjustable reactance and one or more common fixed reactances of the same sign. The input and oscillator circuits of the octode mixer 1 may be tuned by variable condensers 24, 28 selected by switches 21, 25, or by pre-set condensers selected by switches 31 and 35, 41 and 45, 51 and 55. Trimmer condensers 33, 37, 43, 47, 53, 57, are connected to springs of groups 32 and 36, 42 and 46, 52 and 56 and may be selected upon operation of one of the press buttons 30, 40, 50 to tune the receiver. Connected to other springs of the same groups are metal strips 34, 38, 44, 48, 54, 58 which are arranged in an insulated manner over metal rails 61, 62, 71, 72 connected to earth through fixed condensers 63, 64, 73, 74. By making screw connections between the rails and strips as at 65, 75, 66, 76 selected fixed condensers may be connected in parallel with the trimmer condensers to alter the range of adjustment.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE211390X | 1938-05-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB524373A true GB524373A (en) | 1940-08-05 |
Family
ID=5802426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14370/39A Expired GB524373A (en) | 1938-05-16 | 1939-05-13 | Improvements in radio receivers with pre-set tuning |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE434402A (en) |
| CH (1) | CH211390A (en) |
| FR (1) | FR854790A (en) |
| GB (1) | GB524373A (en) |
| NL (1) | NL54071C (en) |
-
0
- BE BE434402D patent/BE434402A/xx unknown
- NL NL54071D patent/NL54071C/xx active
-
1939
- 1939-05-13 GB GB14370/39A patent/GB524373A/en not_active Expired
- 1939-05-15 CH CH211390D patent/CH211390A/en unknown
- 1939-05-16 FR FR854790D patent/FR854790A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL54071C (en) | |
| CH211390A (en) | 1940-09-15 |
| FR854790A (en) | 1940-04-24 |
| BE434402A (en) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB521931A (en) | Improved chassis for a radio-receiver or the like | |
| US2141756A (en) | Multirange receiver | |
| GB546141A (en) | Improvements in or relating to wireless receivers | |
| GB502178A (en) | Improvements in or relating to radio receivers and the like | |
| GB472502A (en) | Improvements in multi-band radio receivers | |
| GB524373A (en) | Improvements in radio receivers with pre-set tuning | |
| GB546248A (en) | Improvements in or relating to electric tuning systems | |
| US2309014A (en) | Multiband tuning system | |
| GB551064A (en) | Improvements in or relating to radio receivers | |
| GB718959A (en) | Improvements in or relating to circuit-arrangements for the frequency changing of high-frequency oscillations | |
| GB497830A (en) | Improvements in or relating to superheterodyne receivers | |
| GB648259A (en) | Improvements relating to frequency converter circuits for multi-band superheterodynereceivers | |
| US1895247A (en) | Method and means of extending frequency range of radio apparatus | |
| US2101715A (en) | Selective circuit arrangement | |
| GB613152A (en) | Improvements in or relating to bandspread tuning devices for radio apparatus | |
| GB314089A (en) | Improvements in or relating to arrangements for tuning high frequency circuits | |
| GB375410A (en) | Improvements in or relating to receiving apparatus for electric wave signals | |
| GB520819A (en) | Improvements in superheterodyne radio receivers with pre-set tuning | |
| GB417947A (en) | Improvements in wireless receiving apparatus | |
| GB422312A (en) | Improvements in or relating to superheterodyne radio receivers | |
| GB478754A (en) | An improved means of obtaining preset reaction in a multi-range radio receiver | |
| GB396772A (en) | Improvements in or relating to radio receivers | |
| GB519755A (en) | Improvements in and relating to the prevention of interference in radio receivers | |
| GB487700A (en) | Improvements in and relating to wireless receiving systems and the like | |
| GB462460A (en) | Improvements in receivers for radio communication |