GB496839A - Improvements in or relating to thermionic valves - Google Patents
Improvements in or relating to thermionic valvesInfo
- Publication number
- GB496839A GB496839A GB3187637A GB3187637A GB496839A GB 496839 A GB496839 A GB 496839A GB 3187637 A GB3187637 A GB 3187637A GB 3187637 A GB3187637 A GB 3187637A GB 496839 A GB496839 A GB 496839A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- electrode
- cathode
- aperture
- valve
- 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
- H01J21/02—Tubes with a single discharge path
- H01J21/06—Tubes with a single discharge path having electrostatic control means only
- H01J21/10—Tubes with a single discharge path having electrostatic control means only with one or more immovable internal control electrodes, e.g. triode, pentode, octode
- H01J21/14—Tubes with means for concentrating the electron stream, e.g. beam tetrode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0029—Electron beam tubes
Landscapes
- Particle Accelerators (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
496,839. Electron beam valves. M-O VALVE CO., Ltd., and WARREN, G. W. Nov. 19, 1937, No. 31876. [Class 39 (i)] In. a thermionic valve in which one or more beams of electrons from the cathode pass through a control grid and accelerating electrode to an aperture in a hollow anode or anodes as described in Specification 403,973, the electrodes are constructed and arranged so that the beam converges to a minimum cross section approximately in the plane of the anode aperture. Fig. 1 shows a valve which emits two electron beams comprising an indirectly heated cathode 1, control grid 2 accelerating screen electrode 4, and hollow anodes 5. A sheet metal auxiliary electrode 3 maintained at a constant (preferably cathode) potential converges the electron beam to a minimum cross section in the plane of the anode aperture. In Fig. 3 (not shown), the screen electrode is also of sheet metal and in Fig. 4 (not shown) the beam is converged by making the surfaces of the cathode, control electrode, and screen concave towards the anode. In Fig. 2, the two parts of the anode are combined into a single unit in the form of a cylinder with inwardly projecting fins 5. This form of anode is easily degassed by eddy currents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3187637A GB496839A (en) | 1937-11-19 | 1937-11-19 | Improvements in or relating to thermionic valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3187637A GB496839A (en) | 1937-11-19 | 1937-11-19 | Improvements in or relating to thermionic valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB496839A true GB496839A (en) | 1938-12-07 |
Family
ID=10329713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3187637A Expired GB496839A (en) | 1937-11-19 | 1937-11-19 | Improvements in or relating to thermionic valves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB496839A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1031895B (en) * | 1952-11-15 | 1958-06-12 | Telefunken Gmbh | Screen grille tubes for amplifying small AC signals with frequencies greater than 50 MHz |
-
1937
- 1937-11-19 GB GB3187637A patent/GB496839A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1031895B (en) * | 1952-11-15 | 1958-06-12 | Telefunken Gmbh | Screen grille tubes for amplifying small AC signals with frequencies greater than 50 MHz |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB480948A (en) | Improvements in or relating to cathode ray tubes | |
| GB496839A (en) | Improvements in or relating to thermionic valves | |
| GB499487A (en) | Improvements in or relating to electron discharge devices for voltage amplification or control | |
| GB582164A (en) | Improvements in thermionic valves | |
| GB497589A (en) | Improvements in or relating to electric discharge tubes | |
| GB498167A (en) | Improvements in or relating to electric discharge tubes | |
| GB467106A (en) | Improvements in or relating to thermionic valves | |
| GB496705A (en) | Improvements in or relating to electric discharge tubes utilising secondary emission | |
| GB491994A (en) | Improvements in multi-electrode thermionic valves | |
| GB429515A (en) | Improvements in thermionic valves and more particularly the anodes thereof | |
| GB528227A (en) | Improvements in or relating to thermionic valves | |
| GB533471A (en) | Improvements in electric discharge tubes | |
| GB499971A (en) | Improvements in or relating to thermionic valves | |
| GB535338A (en) | Electron tube with double control | |
| GB472284A (en) | Improvements in or relating to cathode ray tubes | |
| GB299505A (en) | Improvements in or relating to thermionic valves | |
| GB617187A (en) | Improvements in electric discharge tubes and circuit arrangements therefor | |
| GB448101A (en) | Improvements in or relating to thermionic valves | |
| GB560689A (en) | Improvements in electron beam deflection valves | |
| GB474084A (en) | Improvements in or relating to electron discharge devices | |
| GB519904A (en) | Improvements in or relating to electron discharge devices | |
| GB310760A (en) | Improvements in or relating to thermionic valves | |
| GB483050A (en) | Method of controlling the discharge current of electron valves | |
| GB532082A (en) | Improvements in electron multipliers | |
| GB482226A (en) | Improvements in electric discharge tubes and arrangements incorporating such tubes |