GB158291A - Improvements in wireless telegraph transmitters - Google Patents
Improvements in wireless telegraph transmittersInfo
- Publication number
- GB158291A GB158291A GB2039819A GB2039819A GB158291A GB 158291 A GB158291 A GB 158291A GB 2039819 A GB2039819 A GB 2039819A GB 2039819 A GB2039819 A GB 2039819A GB 158291 A GB158291 A GB 158291A
- Authority
- GB
- United Kingdom
- Prior art keywords
- key
- condenser
- break
- shunted
- transformer
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
158,291. Round, H. J., and Ditcham, W. T. Aug. 19, 1919. Vapour and vacuum or low-pressure apparatus, arrangements of. - Relates to current-rectifying devices for use in wireless teLegraph transmitters employing thermionic valve or spark oscillators. Alternating current supplied through the transformer T is rectified by a valve R and smoothed out by a condenser L of large capacity, so that the leads O, O<1> serve as a source of direct current for an oscillator. According to the invention, a two-armed key or switch K, K<1>, which may be worked from the ordinary sending key, is so arranged as to break the circuits on the two sides of one of the terminals of the condenser L simultaneously, in order that the potential of the condenser may remain constant. The two arms of the key may be shunted by resistances A, A. in a modification, the arm K<1>' may break the primary circuit of the transformer, and in that case it may be shunted by a choke coil. In the modication shown in Fig. 3, the key is replaced by valves V, V<1>, which break circuit when the key k is closed. The key k operates relays C, C', which reverse the grid-potential of the valves V, V<1>, and so interrupt their plate currents.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2039819A GB158291A (en) | 1919-08-19 | 1919-08-19 | Improvements in wireless telegraph transmitters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2039819A GB158291A (en) | 1919-08-19 | 1919-08-19 | Improvements in wireless telegraph transmitters |
Publications (1)
Publication Number | Publication Date |
---|---|
GB158291A true GB158291A (en) | 1921-02-10 |
Family
ID=10145292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2039819A Expired GB158291A (en) | 1919-08-19 | 1919-08-19 | Improvements in wireless telegraph transmitters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB158291A (en) |
-
1919
- 1919-08-19 GB GB2039819A patent/GB158291A/en not_active Expired
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