GB181483A - Improvements relating to telephone systems with high frequency oscillations - Google Patents
Improvements relating to telephone systems with high frequency oscillationsInfo
- Publication number
- GB181483A GB181483A GB802121A GB802121A GB181483A GB 181483 A GB181483 A GB 181483A GB 802121 A GB802121 A GB 802121A GB 802121 A GB802121 A GB 802121A GB 181483 A GB181483 A GB 181483A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grids
- electrodes
- cathode
- high frequency
- improvements relating
- 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
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/62—Modulators in which amplitude of carrier component in output is dependent upon strength of modulating signal, e.g. no carrier output when no modulating signal is present
Landscapes
- Secondary Cells (AREA)
Abstract
181,483. Gill, H. A., (Deutsche Telephonwerke Ges.). March 14, 1921. Drawings to Specification. Vacuum tubes.-A heated cathode and a cold anode are enclosed in an air or gas-filled chamber, two grids being located between the electrodes. The grids may be of different materials or maintained at different temperatures. They may be formed as entwined spirals, and they may have their plane disposed parallel to or transverse to the ionic stream. Other types of valve are described in which (1) one or both electrodes are heated, (2) one or both electrodes are of an alkali metal, (3) a potassium cathode is used, and (4) four grids are inserted between the anode and cathode.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB802121A GB181483A (en) | 1921-03-14 | 1921-03-14 | Improvements relating to telephone systems with high frequency oscillations |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB802121A GB181483A (en) | 1921-03-14 | 1921-03-14 | Improvements relating to telephone systems with high frequency oscillations |
Publications (1)
Publication Number | Publication Date |
---|---|
GB181483A true GB181483A (en) | 1922-06-14 |
Family
ID=9844259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB802121A Expired GB181483A (en) | 1921-03-14 | 1921-03-14 | Improvements relating to telephone systems with high frequency oscillations |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB181483A (en) |
-
1921
- 1921-03-14 GB GB802121A patent/GB181483A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB467703A (en) | Improvements in or relating to electron valves | |
GB592261A (en) | Improvements in or relating to electron discharge devices | |
GB181483A (en) | Improvements relating to telephone systems with high frequency oscillations | |
GB526869A (en) | Improvements in or relating to thermionic valves and systems | |
GB482813A (en) | Improvements in or relating to gas-filled or vapour-filled electric discharge devices | |
GB732644A (en) | Improvements in or relating to contact members for electrode discs of electric discharge tubes | |
GB454760A (en) | Improvements in and relating to electric amplifying tubes | |
US2129076A (en) | Tube for short waves | |
GB478373A (en) | Improvements in cathodes and other electrodes of thermionic discharge apparatus | |
GB1012246A (en) | Vacuum measuring cell for an ionisation gauge | |
GB296769A (en) | Improvements in ionisation chambers | |
GB522317A (en) | Improvements in or relating to electrode arrangements employed in electron dischargedevices | |
ES131674A1 (en) | Improvements in the manufacture of electronic tubes or valves with cathode, anode and four interposed grid electrodes. | |
GB485111A (en) | Improvements in or relating to cathode-ray tubes | |
GB473797A (en) | Improvements in or relating to cooling means for electric discharge devices | |
GB421281A (en) | Improvements in or relating to vacuum or low pressure gas or vapour apparatus for electric discharges | |
GB297332A (en) | Improvements in or relating to thermionic valves | |
GB156664A (en) | Improved means for regulating the terminal voltage of electrical valve tubes | |
GB166241A (en) | Improvements in thermionic devices for wireless telegraphy and telephony | |
GB252079A (en) | Improvements in or relating to four electrode valves and to means for obtaining highfrequency or low frequency magnification or rectification therewith | |
GB226902A (en) | Improvements in or relating to electric vacuum tubes | |
GB307558A (en) | Improvements in thermionic valves | |
GB705740A (en) | Improvements in and relating to electron discharge devices | |
GB565063A (en) | Improvements in or relating to the screening of amplifying valves | |
GB323849A (en) | Improvements in or relating to thermionic valves |