GB344738A - - Google Patents
Info
- Publication number
- GB344738A GB344738A GB1748230A GB1748230A GB344738A GB 344738 A GB344738 A GB 344738A GB 1748230 A GB1748230 A GB 1748230A GB 1748230 A GB1748230 A GB 1748230A GB 344738 A GB344738 A GB 344738A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glow lamp
- series
- valve
- frequency
- june
- 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
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Amplifiers (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
344,738. Wireless receiving apparatus. TELEFUNKEN GES FœR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. June 5, 1930, No. 17482. Convention date, June 8, 1929. [Classes 40 (iii) and 40 (v).] To translate unmodulated carrier-wave signals into low-frequency signals, a voltage drop due to rectified high-frequency currents is applied to excite a glow lamp S in series with a valve V into lowfrequency oscillations or discharges. A telephone T or its equivalent is in series with the glow lamp to render the low-frequency oscillations audible. A potential for the glow lamp just below the extinguishing valve is obtained from a potentiometer P across the high-tension battery B, a condenser K is shunted across the glow lamp, and a resistance W is connected in series with the high-tension battery in the anode circuit of the valve. The light from the glow lamp may be used for recording, for example in copying-telegraphy.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET37053D DE520083C (en) | Device for making unmodulated telegraphic characters audible |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB344738A true GB344738A (en) | 1931-03-12 |
Family
ID=7559843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1748230A Expired GB344738A (en) | 1930-06-05 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE520083C (en) |
| GB (1) | GB344738A (en) |
-
0
- DE DET37053D patent/DE520083C/en not_active Expired
-
1930
- 1930-06-05 GB GB1748230A patent/GB344738A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE520083C (en) | 1931-03-07 |
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