GB915673A - Improvements in cathode electrodes for thermionic valves - Google Patents

Improvements in cathode electrodes for thermionic valves

Info

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
Application number
GB39093/61A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB915673A publication Critical patent/GB915673A/en
Expired legal-status Critical Current

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

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.
GB39093/61A 1960-11-04 1961-11-01 Improvements in cathode electrodes for thermionic valves Expired GB915673A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
FR762953A (en) * 1932-10-27 1934-04-21 Siemens Ag Constantly controlled vapor or gas discharge tube
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
DE1133041B (en) * 1954-10-22 1962-07-12 Gen Electric Process for the production of a heater or cathode body consisting of a thin film for a tube heated with high frequency and the heater or cathode body produced by the process
NL88786C (en) * 1955-04-02

Also Published As

Publication number Publication date
US3227912A (en) 1966-01-04
DE1146985B (en) 1963-04-11

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