GB594022A - Improvements in or relating to tuning devices for radio receivers and the like - Google Patents
Improvements in or relating to tuning devices for radio receivers and the likeInfo
- Publication number
- GB594022A GB594022A GB13073/45A GB1307345A GB594022A GB 594022 A GB594022 A GB 594022A GB 13073/45 A GB13073/45 A GB 13073/45A GB 1307345 A GB1307345 A GB 1307345A GB 594022 A GB594022 A GB 594022A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- oscillator
- condensers
- cylindrical member
- supports
- 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
- 239000002184 metal Substances 0.000 abstract 2
- 229910010293 ceramic material Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J3/00—Continuous tuning
- H03J3/20—Continuous tuning of single resonant circuit by varying inductance only or capacitance only
Landscapes
- Structure Of Receivers (AREA)
Abstract
594,022. Condensers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. May 25, 1945, No. 13073. Convention date, May 25, 1944. [Class 37] A frame member 1 with upright arms 2, 3, carrying bearings 4, 5, supports a cylindrical member 7 mounted on a threaded rod 6 so that an axial movement of the cylindrical member 7 is produced by rotation of the rod 6. The member 7 may be of ceramic material and is coated with two metal films, each film extending slightly less than 180 degrees round the inner periphery of the cylinder and constituting two movable plates of a pair of condensers which serve to tune the oscillator and signal circuits of a superheterodyne receiver. The oscillator plate 10 is suitably shaped along its length to permit the oscillator circuit to " track " with the signal circuit, obviating the necessity for a padding condenser. The cylindrical member 7 engages varying amounts of a concentric metal cylinder 15 rigidly mounted to form the common plate of the two tuning condensers. The insulating tube 18 which supports the cylinder 15 may also constitute a former for an oscillator coil contained within the cylinder 15. Specification 559,717 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US594022XA | 1944-05-25 | 1944-05-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB594022A true GB594022A (en) | 1947-10-31 |
Family
ID=22022711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13073/45A Expired GB594022A (en) | 1944-05-25 | 1945-05-25 | Improvements in or relating to tuning devices for radio receivers and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB594022A (en) |
-
1945
- 1945-05-25 GB GB13073/45A patent/GB594022A/en not_active Expired
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