GB915673A - Improvements in cathode electrodes for thermionic valves - Google Patents
Improvements in cathode electrodes for thermionic valvesInfo
- Publication number
- GB915673A GB915673A GB39093/61A GB3909361A GB915673A GB 915673 A GB915673 A GB 915673A GB 39093/61 A GB39093/61 A GB 39093/61A GB 3909361 A GB3909361 A GB 3909361A GB 915673 A GB915673 A GB 915673A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mesh
- heated
- tube
- current
- nov
- 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
- H01J1/22—Heaters
-
- 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
- H01J1/15—Cathodes heated directly by an electric current
- H01J1/16—Cathodes heated directly by an electric current characterised by the shape
Landscapes
- Electron Sources, Ion Sources (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
915,673. Electrically-heated cathodes. SIEMENS & HALSKE A.G. Nov. 1, 1961 [Nov. 4, 1960], No. 39093/61. Class 39 (3). [Also in Group XL (a)] A thermionic cathode comprises a tubular wire mesh 2 surrounded by a coaxial metal tube 1, the tube and mesh being connected together at one end and connected to spaced current leads 3, 5 at the other end. As shown, the mesh 2 comprises right-hand and left-hand helically wound wires, welded together at some, or all, of their intersections. The tubular supply leads 3, 5 are supported by a ceramic plate 4. The dimensions and materials of tube 1 may be such that it is both directly-heated by the passage of current therethrough, and indirectly-heated by passage of current through mesh 2, or such that it is heated substantially wholly indirectly by the mesh 2.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES71134A DE1146985B (en) | 1960-11-04 | 1960-11-04 | Semi-indirectly heated cathode for electron tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB915673A true GB915673A (en) | 1963-01-16 |
Family
ID=7502258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB39093/61A Expired GB915673A (en) | 1960-11-04 | 1961-11-01 | Improvements in cathode electrodes for thermionic valves |
Country Status (3)
Country | Link |
---|---|
US (1) | US3227912A (en) |
DE (1) | DE1146985B (en) |
GB (1) | GB915673A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1208830B (en) * | 1963-06-12 | 1966-01-13 | Dr Jakob Bingel | Device for generating a high-power electron beam for heating purposes |
US3299317A (en) * | 1963-06-12 | 1967-01-17 | Varian Associates | Electron tube having a quick heating cathode with means to apply a variable voltage to the quick heating cathode |
FR1490577A (en) * | 1966-05-18 | 1967-08-04 | Thomson Houston Comp Francaise | Cage-Shaped Direct Heating Cathode Improvements |
US3737711A (en) * | 1968-11-21 | 1973-06-05 | Varian Associates | Electron tube having an improved filamentary cathode and support therefor and method of making same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB301827A (en) * | 1927-12-06 | 1929-10-31 | Telefunken Gesellschaft Fur Drahtlose Telegraphie M.B.H. | |
US1844319A (en) * | 1929-09-25 | 1932-02-09 | Hatt Emil | Means for producing radio waves |
US2032137A (en) * | 1932-10-27 | 1936-02-25 | Westinghouse Electric & Mfg Co | Uniformly controllable gas or vapor discharge valve |
DE745329C (en) * | 1941-02-13 | 1944-03-24 | Telefunken Gmbh | Indirectly heated cathode |
BE465936A (en) * | 1944-03-20 | |||
US2422469A (en) * | 1945-07-09 | 1947-06-17 | Edward A Coomes | Electron emitting cathode |
FR1137688A (en) * | 1954-10-22 | 1957-06-03 | Thomson Houston Comp Francaise | Advanced cathode |
NL88786C (en) * | 1955-04-02 |
-
1960
- 1960-11-04 DE DES71134A patent/DE1146985B/en active Pending
-
1961
- 1961-10-25 US US147627A patent/US3227912A/en not_active Expired - Lifetime
- 1961-11-01 GB GB39093/61A patent/GB915673A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1146985B (en) | 1963-04-11 |
US3227912A (en) | 1966-01-04 |
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