GB297709A - Improvements in electrical signalling systems - Google Patents
Improvements in electrical signalling systemsInfo
- Publication number
- GB297709A GB297709A GB1696027A GB1696027A GB297709A GB 297709 A GB297709 A GB 297709A GB 1696027 A GB1696027 A GB 1696027A GB 1696027 A GB1696027 A GB 1696027A GB 297709 A GB297709 A GB 297709A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- signals
- valve
- thermionic
- received
- 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
- H03G—CONTROL OF AMPLIFICATION
- H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
- H03G11/04—Limiting level dependent on strength of signal; Limiting level dependent on strength of carrier on which signal is modulated
Landscapes
- Exhaust Silencers (AREA)
Abstract
297,709. Gage, E. G. June 25, 1927. Atmospherics and undesired signals, eliminating ; thermionic relays; thermionic detectors.-In means for separating desired from undesired electric. currents in which the received currents are fed to two circuits with outputs in opposition, one circuit being unable to reproduce a wave train of the desired frequency on account of ` fatigue ' effect, a thermionic valve is employed in each circuit and the efficiency is enhanced by repetition through a feed-back arrangement. Signals received in a circuit 1 are transferred through a current-limiting circuit 3 - - 6 and a full-wave rectifying-system 8, 9 to the two opposed circuits containing valves 15, 16 respectively. Grid-biasing batteries 13, 14 are adjusted so that no plate current flows when no signals are received. High-tension for the valve 15 is obtained from a storage condenser 22 fed through a rectifier 18 and storage condenser 19 and smoothing circuit 20, 21 from an alternator 17 having a frequency less than that of the desired signal. Signals of the desired frequency exhaust the high-tension supply to the valve 15 which then ceases to oppose the valve 16, and signals appear in the output circuit 32, but irregular atmospherics do not exhaust the high-tension supply and are therefore eliminated by opposition between the output of valves 15, 16. 'The effect is enhanced by means of a feed-back circuit 34 - - 37. Specification 258,635 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1696027A GB297709A (en) | 1927-06-25 | 1927-06-25 | Improvements in electrical signalling systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1696027A GB297709A (en) | 1927-06-25 | 1927-06-25 | Improvements in electrical signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB297709A true GB297709A (en) | 1928-09-25 |
Family
ID=10086742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1696027A Expired GB297709A (en) | 1927-06-25 | 1927-06-25 | Improvements in electrical signalling systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB297709A (en) |
-
1927
- 1927-06-25 GB GB1696027A patent/GB297709A/en not_active Expired
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