GB421287A - Improvements in thermionic valves and valve circuits - Google Patents
Improvements in thermionic valves and valve circuitsInfo
- Publication number
- GB421287A GB421287A GB1724133A GB1724133A GB421287A GB 421287 A GB421287 A GB 421287A GB 1724133 A GB1724133 A GB 1724133A GB 1724133 A GB1724133 A GB 1724133A GB 421287 A GB421287 A GB 421287A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- cathodes
- grids
- stage
- anode
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/20—Tubes with more than one discharge path; Multiple tubes, e.g. double diode, triode-hexode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/003—Tubes with plural electrode systems
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
- Electrotherapy Devices (AREA)
- Microwave Tubes (AREA)
Abstract
421,287. Thermionic valves. MURPHY RADIO, Ltd., and BAKER, G. B., 62, Brook Street, Hanover Square, London. June 16, 1933, No. 17241. [Classes 39 (i) and 40 (v)] A valve comprises two indirectly-heated cathodes spaced apart along a common heater, a grid structure, comprising one or more grids, surrounding both cathodes, and a single anode around the grid structure. In one form, Fig. 1, two cathodes consist of coated nickel tubes 6, 7 surrounding a quartz tube which encases a heater filament 4, and are surrounded by grids 11, 12 carried on posts 13. The posts 13 are set in metal strips 17 which grip a mica insulator 16 by bent-over lugs. The structure 16, 17 also screens the cathodes 6, 7 from each other. The grid 12 is wound non-uniformly to give a variable-mu characteristic. A screen grid 18 and suppressor grid 19 and an anode 3 surround the grids. The valve may be used in the first stage of a superheterodyne receiver, as shown in Fig. 6 where the input circuit 20 is connected to the variable-mu grid 12 which has an automatically variable bias and to the cathode 7. A local oscillator circuit 22 is connected between the anode 3, the grid 11 and the cathode 6 and the tuned circuit 25 couples the first stage to a further amplifying stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1724133A GB421287A (en) | 1933-06-16 | 1933-06-16 | Improvements in thermionic valves and valve circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1724133A GB421287A (en) | 1933-06-16 | 1933-06-16 | Improvements in thermionic valves and valve circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB421287A true GB421287A (en) | 1934-12-17 |
Family
ID=10091732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1724133A Expired GB421287A (en) | 1933-06-16 | 1933-06-16 | Improvements in thermionic valves and valve circuits |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB421287A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2658995A (en) * | 1946-01-17 | 1953-11-10 | John W Christensen | Autodyne converter |
-
1933
- 1933-06-16 GB GB1724133A patent/GB421287A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2658995A (en) * | 1946-01-17 | 1953-11-10 | John W Christensen | Autodyne converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB445084A (en) | Improvements in or relating to electron discharge devices | |
| GB421287A (en) | Improvements in thermionic valves and valve circuits | |
| US2342492A (en) | Ultra-high-frequency amplifier | |
| US2239560A (en) | Electron discharge tube and circuits | |
| GB467915A (en) | Improvements in or relating to electron discharge devices and to circuits therefor | |
| GB469897A (en) | Improvements in or relating to cathode ray tubes | |
| GB437804A (en) | Improvements in or relating to thermionic valves for use in radio signalling systems | |
| US2036696A (en) | Electron discharge device | |
| GB471672A (en) | Improvements in or relating to electron discharge devices | |
| US2107333A (en) | Electron discharge device | |
| GB480867A (en) | Improvements in or relating to electron discharge tubes | |
| GB450351A (en) | Grid-current detector for television purposes | |
| GB435933A (en) | Improvements in and relating to electron discharge devices | |
| US1365576A (en) | Radio-receiving syste | |
| GB519643A (en) | Improvements in or relating to electron discharge devices | |
| US3029395A (en) | Regenerative circuit for cold cathode vacuum tubes | |
| GB431889A (en) | Improvements in or relating to gas or vapour filled electric discharge devices | |
| US2024736A (en) | Two-anode tube and connection system for the same | |
| GB408330A (en) | Improvements in vacuum electric tube devices or valves for use in particular gain control circuits | |
| US2073946A (en) | Electron discharge device | |
| GB487674A (en) | Improvements in or relating to electron discharge devices | |
| GB460236A (en) | Improvements in or relating to electron discharge devices and circuit arrangements incorporating the same | |
| GB274514A (en) | Improvements relating to multiple thermionic valves | |
| GB421644A (en) | Improvements in and relating to thermionic valves and to circuits therefor | |
| GB410619A (en) | Improvements in or relating to electron discharge devices and circuits incorporatingthe same |