GB153681A - Improvements in or relating to wireless receiving systems - Google Patents
Improvements in or relating to wireless receiving systemsInfo
- Publication number
- GB153681A GB153681A GB2005219A GB2005219A GB153681A GB 153681 A GB153681 A GB 153681A GB 2005219 A GB2005219 A GB 2005219A GB 2005219 A GB2005219 A GB 2005219A GB 153681 A GB153681 A GB 153681A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- grid
- circuit
- coupled
- 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
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
- H03D7/10—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between different pairs of electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
153,681. Taggart, J. Scott-. Aug. 14, 1919. Wireless telegraphy and signalling.-A wireless receiving-apparatus comprises a thermionic valve 19 with two grids 6, 18, the input circuit 2, 3 being connected across the first grid 6 and the cathode 5, and the anode or output circuit being coupled to an oscillatory circuit 14, 15 connected across the second grid 18 and the cathode 5. The connexion to the second grid 18 may include a condenser 16 shunted by a resistance 17, the valve then acting as a rectifier, enabling the received signals to be heard in the telephone 13; but, if desired, the valve may be employed merely as an amplifier, the oscillations in its output circuit being fed to an independent detector and telephone. If the coupling 11, 14 is made closer, the valve generates oscillations at a frequency determined by the coupled circuits ; and for heterodyne reception this frequency is made nearly equal to the wave frequency, to which the circuit 2, 3 is accurately tuned. Either of the coils 11, 14 may be coupled with the coils 1 or 2. Electro-static couplings may be substituted for the eelctro-magnetic couplings.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2005219A GB153681A (en) | 1919-08-14 | 1919-08-14 | Improvements in or relating to wireless receiving systems |
| FR529141D FR529141A (en) | 1919-08-14 | 1920-12-29 | Improvements to reception methods in t. s. f. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2005219A GB153681A (en) | 1919-08-14 | 1919-08-14 | Improvements in or relating to wireless receiving systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB153681A true GB153681A (en) | 1920-11-15 |
Family
ID=10139549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2005219A Expired GB153681A (en) | 1919-08-14 | 1919-08-14 | Improvements in or relating to wireless receiving systems |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR529141A (en) |
| GB (1) | GB153681A (en) |
-
1919
- 1919-08-14 GB GB2005219A patent/GB153681A/en not_active Expired
-
1920
- 1920-12-29 FR FR529141D patent/FR529141A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR529141A (en) | 1921-11-23 |
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