GB445738A - Improvements in and relating to electron discharge devices - Google Patents
Improvements in and relating to electron discharge devicesInfo
- Publication number
- GB445738A GB445738A GB10462/35A GB1046235A GB445738A GB 445738 A GB445738 A GB 445738A GB 10462/35 A GB10462/35 A GB 10462/35A GB 1046235 A GB1046235 A GB 1046235A GB 445738 A GB445738 A GB 445738A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- anode
- grid
- april
- envelope
- 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
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/02—Electron-emitting electrodes; Cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
Landscapes
- Electron Sources, Ion Sources (AREA)
Abstract
445,738. Discharge apparatus. ROGERS RADIO TUBES, Ltd., 100, Sterling Road, Toronto, Canada. April 4, 1935, No. 10462. Convention date, April 4, 1934. [Class 39 (i)] A vacuum discharge device has a cathode, a rodlike anode and a control grid disposed externally to the cathode and anode and formed with reentrant or constricted portions located in the region between the cathode and the anode. More than one anode may be provided with a re-entrant portion of the grid between each anode and the cathode. As shown in Fig. 2, the indirectlyheated cathode 11 and the anodes 12, 13 are surrounded by the helically wound control grid 15 and spaced apart by preferably ceramic members 17, 18. A further mica spacer 20 may be rectangular in shape with a central aperture, for positioning the electrode assembly in the envelope. The grid 15, Fig. 3, is constricted between the cathode and each anode and the ratio of the distance d between the constrictions to that between the cathode and anode is preferably 10 per cent and not more than 33 per cent. A large amplification factor is obtained and the grid may be designed to give a " variable-mu " effect. A directlyheated filamentary cathode may be employed. The anode rods may be of tungsten, molybdenum or nickel, and are operated at white heat. In a modification the anode rods are electrically connected within the valve. A metal coating on the envelope is preferably connected to the cathode and reduces ill effects of wall charges.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US445738XA | 1934-04-04 | 1934-04-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB445738A true GB445738A (en) | 1936-04-17 |
Family
ID=21933112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10462/35A Expired GB445738A (en) | 1934-04-04 | 1935-04-04 | Improvements in and relating to electron discharge devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB445738A (en) |
-
1935
- 1935-04-04 GB GB10462/35A patent/GB445738A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB445738A (en) | Improvements in and relating to electron discharge devices | |
US2324766A (en) | Electron discharge device | |
US2030930A (en) | Electron discharge device | |
GB460700A (en) | Improvements in or relating to electron valves | |
US2052103A (en) | Electric discharge tube | |
US2478573A (en) | Electric discharge tube and seal therefor | |
GB454760A (en) | Improvements in and relating to electric amplifying tubes | |
GB520623A (en) | Improvements in electric discharge tubes for the optical indication of voltages | |
US1982067A (en) | Thermionic rectifier | |
US1921061A (en) | Vacuum tube | |
GB537492A (en) | Improvements in or relating to electron discharge apparatus | |
GB392815A (en) | Improvements in or relating to electric discharge tubes | |
GB251971A (en) | Improvements in or relating to electron discharge tubes or thermionic valves | |
GB617187A (en) | Improvements in electric discharge tubes and circuit arrangements therefor | |
GB531903A (en) | Improvements in or relating to electron discharge devices | |
GB540015A (en) | High powered electron discharge devices | |
GB514456A (en) | Improvements in or relating to electron discharge devices | |
GB249939A (en) | Equipotential cathode tube | |
GB310903A (en) | Improvements in thermionic valves | |
GB446452A (en) | Improvements in or relating to electron tubes or valves | |
GB297886A (en) | Improvements in or relating to thermionic valves | |
GB482461A (en) | Improvements relating to electron discharge devices | |
GB615446A (en) | Improvements in or relating to electric discharge tube arrangements for operation atvery high frequencies | |
GB516193A (en) | Improvements in or relating to electron discharge and like devices and electrodes therefor | |
GB525599A (en) | Improvements in or relating to electric discharge tubes |