GB493862A - Improvements in or relating to remotely controllable tuning arrangements - Google Patents
Improvements in or relating to remotely controllable tuning arrangementsInfo
- Publication number
- GB493862A GB493862A GB1077637A GB1077637A GB493862A GB 493862 A GB493862 A GB 493862A GB 1077637 A GB1077637 A GB 1077637A GB 1077637 A GB1077637 A GB 1077637A GB 493862 A GB493862 A GB 493862A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cable
- oscillator
- length
- coupled
- given
- 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
- H03J9/00—Remote-control of tuned circuits; Combined remote-control of tuning and other functions, e.g. brightness, amplification
- H03J9/002—Remote-control of tuned circuits; Combined remote-control of tuning and other functions, e.g. brightness, amplification comprising one or more tuning stages separated from the rest of a receiver
Abstract
493,862. Wireless systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and RAMSAY, J. F. April 15, 1937, No. 10776. [Class 40 (v)] A remote-control tuning arrangement comprises a local circuit, such as the grid coil 3 of an oscillator 1, coupled to a length of concentric cable 10, 11, the remote end of which is coupled to a series resonant circuit 12, 13 so dimensioned with respect to the electrical length of the cable that the oscillator tuning may be varied by the condenser 13 between frequencies corresponding to “ and ¢ wavelength of the cable. The tendency of such an arrangement to oscillate on several "modes" may be prevented by using one or more acceptor circuits 14, 15 or by resonating the anode circuit in the higher portion of the desired range of frequencies, the resulting rising voltage-frequency characteristic thus given to the oscillator being levelled if desired by a resistance across the reaction coil 2. The required physical length of cable together with the necessary electrical length may be obtained by adding an artificial line to a given cable.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1077637A GB493862A (en) | 1937-04-15 | 1937-04-15 | Improvements in or relating to remotely controllable tuning arrangements |
| FR836505D FR836505A (en) | 1937-04-15 | 1938-04-12 | Remote tuning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1077637A GB493862A (en) | 1937-04-15 | 1937-04-15 | Improvements in or relating to remotely controllable tuning arrangements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB493862A true GB493862A (en) | 1938-10-17 |
Family
ID=9974048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1077637A Expired GB493862A (en) | 1937-04-15 | 1937-04-15 | Improvements in or relating to remotely controllable tuning arrangements |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR836505A (en) |
| GB (1) | GB493862A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT399122B (en) * | 1988-05-04 | 1995-03-27 | Ganzberger Walter Ing | WELDING MACHINE FOR BLOW WELDING PLASTIC PROFILES |
-
1937
- 1937-04-15 GB GB1077637A patent/GB493862A/en not_active Expired
-
1938
- 1938-04-12 FR FR836505D patent/FR836505A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR836505A (en) | 1939-01-19 |
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