GB711418A - Improvements in cathodes - Google Patents

Improvements in cathodes

Info

Publication number
GB711418A
GB711418A GB16261/52A GB1626152A GB711418A GB 711418 A GB711418 A GB 711418A GB 16261/52 A GB16261/52 A GB 16261/52A GB 1626152 A GB1626152 A GB 1626152A GB 711418 A GB711418 A GB 711418A
Authority
GB
United Kingdom
Prior art keywords
ribs
cathode
filaments
degrees
emitters
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
GB16261/52A
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Publication of GB711418A publication Critical patent/GB711418A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/04—Cathodes
    • H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • H01J25/58—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having a number of resonators; having a composite resonator, e.g. a helix
    • H01J25/587—Multi-cavity magnetrons

Landscapes

  • Microwave Tubes (AREA)

Abstract

711,418. Thermionic cathode constructions. RADIO CORPORATION OF AMERICA. June 27, 1952 [July 12, 1951], No. 16261/52. Class 39(1) A cathode for a magnetron comprises an element having a plurality of outwardly projecting parallel shield ribs, and a thermionic emitter mounted adjacent to one side of each of the ribs and spaced from them, the element serving to protect the emitters against back-bombardment by electrons. In the construction shown in elevation and section in Figs. 1 and 2, the shield element 10 is cylindrical and is provided with V-shaped grooves separated by ribs 12' which may be provided with extensions 57. In each groove is mounted an emitter 13, which may be a directly heated filament; the filaments 13 may be supported at the top end by T-shaped heads 15 fitting in slots 16 in a support member 17 insulated from the element 10; at the lower end the filaments may be tensioned by leaf springs 37. The inside of the element 10 is hollow and is connected to conduits inside the support 9 of the cathode so that cooling fluid may be circulated along the path shown by arrows in Fig. 1. The edges of the grooves preferably form angles of 30 and 60 degrees with a plane passing through the vertex and the centre of the element 10, the emitters being parallel to the sides forming angles of 30 degrees.
GB16261/52A 1951-07-12 1952-06-27 Improvements in cathodes Expired GB711418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US236361A US2802125A (en) 1951-07-12 1951-07-12 Cathodes

Publications (1)

Publication Number Publication Date
GB711418A true GB711418A (en) 1954-06-30

Family

ID=22889168

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16261/52A Expired GB711418A (en) 1951-07-12 1952-06-27 Improvements in cathodes

Country Status (5)

Country Link
US (1) US2802125A (en)
DE (1) DE1006532B (en)
FR (1) FR1055323A (en)
GB (1) GB711418A (en)
NL (2) NL171019B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133614A (en) * 1983-01-18 1984-07-25 Varian Associates Coaxial magnetron with improved starting

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE627608A (en) * 1962-04-09
US3401292A (en) * 1966-06-17 1968-09-10 Fivre Valvole Radio Elett Spa Fluid cooled hollow cathode discharge tube
US3995187A (en) * 1971-09-07 1976-11-30 Telic Corporation Electrode type glow discharge apparatus
FR2962253B1 (en) 2010-07-01 2012-08-31 Areva T & D Sas BREAKER CHAMBER FOR MEDIUM-VOLTAGE HIGH VOLTAGE CIRCUIT BREAKER WITH REDUCED DIMENSIONS

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409038A (en) * 1942-12-31 1946-10-08 Rca Corp Magnetron and circuit therefor
NL67823C (en) * 1946-03-16
US2544664A (en) * 1949-03-17 1951-03-13 Rca Corp High-frequency high-power tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133614A (en) * 1983-01-18 1984-07-25 Varian Associates Coaxial magnetron with improved starting

Also Published As

Publication number Publication date
DE1006532B (en) 1957-04-18
NL91419C (en)
NL171019B (en)
FR1055323A (en) 1954-02-17
US2802125A (en) 1957-08-06

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