GB225847A - Improvements in or relating to receiving systems for high frequency and low frequency alternating current telephony and telegraphy - Google Patents
Improvements in or relating to receiving systems for high frequency and low frequency alternating current telephony and telegraphyInfo
- Publication number
- GB225847A GB225847A GB28879/24A GB2887924A GB225847A GB 225847 A GB225847 A GB 225847A GB 28879/24 A GB28879/24 A GB 28879/24A GB 2887924 A GB2887924 A GB 2887924A GB 225847 A GB225847 A GB 225847A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- relay
- telegraphy
- alternating current
- low frequency
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
- H04B15/04—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder
- H04B15/06—Reducing interference from electric apparatus by means located at or near the interfering apparatus the interference being caused by substantially sinusoidal oscillations, e.g. in a receiver or in a tape-recorder by local oscillators of receivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Radio Relay Systems (AREA)
Abstract
225,847. Lorenz Akt.-Ges., C. Dec. 4, 1923, [Convention date]. Void [Published under Sect. 91 of the Act]. Thermionic amplifiers and detectors.-In a receiving system for high or low frequency alternating current telegraphy or telephony, a wave-sensitive device or a relay is arranged to suppress auxiliary oscillations at the moment of their production. Fig. 2 shows a wireless-receiving circuit arranged so that, when the aerial circuit is set in oscillation, the resistance of the wave-sensitive device a is increased and allows relay r to operate, thus altering the tuning of the circuit e or affecting the current source of the regenerator so as to suppress the oscillations. In a modification, the relay is omitted and the changed resistance of the device a changes the tuning of the receiving circuit. In a further modification, Fig. 3, the relay r is arranged in the plate circuit of a thermionic valve and operates on excessive current flowing in that circuit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE225847X | 1923-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB225847A true GB225847A (en) | 1926-04-29 |
Family
ID=5863048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28879/24A Expired GB225847A (en) | 1923-12-04 | 1924-12-02 | Improvements in or relating to receiving systems for high frequency and low frequency alternating current telephony and telegraphy |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR589888A (en) |
| GB (1) | GB225847A (en) |
-
1924
- 1924-12-01 FR FR589888D patent/FR589888A/en not_active Expired
- 1924-12-02 GB GB28879/24A patent/GB225847A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR589888A (en) | 1925-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB182135A (en) | Improvements in or relating to wireless signalling systems | |
| GB628257A (en) | Thermionic valve circuit arrangements for alternately switching on and off alternating signals to a load | |
| GB507454A (en) | Improvements in frequency stabilisation arrangements for oscillation generators | |
| GB225847A (en) | Improvements in or relating to receiving systems for high frequency and low frequency alternating current telephony and telegraphy | |
| GB289875A (en) | Improvements in or relating to high frequency circuit arrangements, radio transmitters and the like | |
| US2210406A (en) | Frequency determining circuit | |
| US2840712A (en) | Combined oscillator and balanced modulator | |
| GB393206A (en) | Improvements in or relating to very short wave modulated radio and other carrier wave transmitters | |
| GB352357A (en) | Improvements in and relating to high frequency signalling systems | |
| US1539820A (en) | Wave signaling system | |
| GB343678A (en) | Improvements in or relating to modulating arrangements, suitable for use in wireless and other high frequency signalling systems | |
| GB314343A (en) | Improvements in or relating to wireless signalling apparatus | |
| GB379305A (en) | Wireless system | |
| GB277397A (en) | Improvements in or relating to wireless receiving apparatus | |
| GB648627A (en) | Television i.f. amplifier | |
| GB267941A (en) | Improvements in or relating to thermionic valves and circuits therefor | |
| GB502248A (en) | Improvements in or relating to high frequency tuned circuits | |
| GB530576A (en) | Improvements in receiving apparatus for alternating current telegraphy | |
| GB399074A (en) | Improvements in or relating to modulated carrier wave transmitters | |
| GB283549A (en) | Improvements in or relating to radio transmission systems | |
| GB270734A (en) | Improvements in high frequency signalling systems | |
| GB456074A (en) | Improvements in detecting circuits for radio receiving systems | |
| GB405025A (en) | Improvements in keying arrangements for high frequency signalling systems | |
| GB228159A (en) | Improvements in vacuum tube oscillation generators for wireless transmission | |
| GB223625A (en) | Thermionic valve circuits |