GB297886A - Improvements in or relating to thermionic valves - Google Patents
Improvements in or relating to thermionic valvesInfo
- Publication number
- GB297886A GB297886A GB846728A GB846728A GB297886A GB 297886 A GB297886 A GB 297886A GB 846728 A GB846728 A GB 846728A GB 846728 A GB846728 A GB 846728A GB 297886 A GB297886 A GB 297886A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- cathode
- envelope
- grid
- leads
- 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
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
297,886. Bullimore, W. R. March 30, 1927. Divided application. Vacuum tubes.-A valve has an indirectly-heated equipotential cathode in which one or more electronemitting surfaces 6 are formed on the inside of a cylinder 5 of silica or similar insulating material disposed within a vitreous envelope and around a central anode. A heating coil 7 is mounted around the cylinder, and its leads are taken through the upper end of 'the envelope. The anode consists of a metal tube 2 mounted around a glass tube 3 through which a cooling fluid such as water is circulated; or cooling fins may be provided on an extension of the anode outside the envelope. The leads for the anode, cathode, and grid 4, are taken through the lower end of the envelope. The cathode may be arranged so as to prevent the formation of induced; currents in the electron-emitting surface. Several sets of electrodes with a single heater may be mounted in an envelope. According to, the Provisional Specification the cathode and grid may be arranged inside the anode, and the cathode may have flat sides with rounded ends, the anode being in the form of a plate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB846728A GB297886A (en) | 1927-03-30 | 1927-03-30 | Improvements in or relating to thermionic valves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB846728A GB297886A (en) | 1927-03-30 | 1927-03-30 | Improvements in or relating to thermionic valves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB297886A true GB297886A (en) | 1928-10-01 |
Family
ID=9853013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB846728A Expired GB297886A (en) | 1927-03-30 | 1927-03-30 | Improvements in or relating to thermionic valves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB297886A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2445754A (en) * | 1943-06-19 | 1948-07-27 | Melvin D Baller | Vacuum tube |
-
1927
- 1927-03-30 GB GB846728A patent/GB297886A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2445754A (en) * | 1943-06-19 | 1948-07-27 | Melvin D Baller | Vacuum tube |
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