GB1464201A - Electron tube grid structure - Google Patents

Electron tube grid structure

Info

Publication number
GB1464201A
GB1464201A GB2885675A GB2885675A GB1464201A GB 1464201 A GB1464201 A GB 1464201A GB 2885675 A GB2885675 A GB 2885675A GB 2885675 A GB2885675 A GB 2885675A GB 1464201 A GB1464201 A GB 1464201A
Authority
GB
United Kingdom
Prior art keywords
bars
cathode
wires
grid
emissive
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
GB2885675A
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.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
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 Varian Associates Inc filed Critical Varian Associates Inc
Publication of GB1464201A publication Critical patent/GB1464201A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/02—Tubes with a single discharge path
    • H01J21/06—Tubes with a single discharge path having electrostatic control means only
    • H01J21/065—Devices for short wave tubes
    • 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
    • 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
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/32—Anodes
    • H01J19/34—Anodes forming part of the envelope
    • 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
    • H01J2893/0002—Construction arrangements of electrode systems
    • H01J2893/0003—Anodes forming part of vessel walls

Landscapes

  • Microwave Tubes (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

1464201 Thermionic cathode tubes VARIAN ASSOCIATES 9 July 1975 [10 July 1974] 28856/75 Heading H1D An electron tube comprises a cathode 28 with alternating emissive and non-emissive areas 38, 39 and a grid electrode comprising conductive bars 33 aligned with the non-emissive areas and an array of wires 37, of a size and spacing less than the bars, connected across the bars on the side nearest the cathode. The grid may be cylindrical or planar. The wires 37 are arranged diagonally to the bars in one direction or two to form a mesh. The wires of Ni are brazed to bars of Mo using Au. The cathode contains a spiral heater 25 and is closed by metal discs 30 and heat shield 31. These are connected by a ceramic plug 35 to a flanged disc 34 welded to the bars 33. A further grid aligned with the bars converts the triode to a tetrode. The arrangement increases the amplification factor by 10 fold. The tube is used as an on-off switch or h.f. amplifier.
GB2885675A 1974-07-10 1975-07-09 Electron tube grid structure Expired GB1464201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US487406A US3917973A (en) 1974-07-10 1974-07-10 Electron tube duplex grid structure

Publications (1)

Publication Number Publication Date
GB1464201A true GB1464201A (en) 1977-02-09

Family

ID=23935601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2885675A Expired GB1464201A (en) 1974-07-10 1975-07-09 Electron tube grid structure

Country Status (7)

Country Link
US (1) US3917973A (en)
JP (1) JPS5812971B2 (en)
CH (1) CH587564A5 (en)
DE (1) DE2528562A1 (en)
FR (1) FR2278154A1 (en)
GB (1) GB1464201A (en)
NL (1) NL7508140A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5069419A (en) * 1973-10-22 1975-06-10
CH658749A5 (en) * 1980-08-27 1986-11-28 Vsesoyuzny Elektrotekhnichesky ELECTRON BEAM TUBES.
JPS633082Y2 (en) * 1980-12-18 1988-01-26
JPS5930530U (en) * 1982-05-14 1984-02-25 三菱電機株式会社 Internal combustion engine idle speed control device
FR2627898B1 (en) * 1988-02-26 1990-06-22 Thomson Csf ELECTRONIC TUBE COOLED BY CIRCULATION OF A FLUID
JP4473585B2 (en) * 2004-01-08 2010-06-02 浜松ホトニクス株式会社 Photomultiplier tube

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2844752A (en) * 1956-03-09 1958-07-22 Rca Corp Electron discharge device
US2932754A (en) * 1957-07-30 1960-04-12 Machlett Lab Inc Electron tubes
CH470752A (en) * 1967-03-15 1969-03-31 Patelhold Patentverwertung Controllable high vacuum electron tube
US3573535A (en) * 1968-11-12 1971-04-06 Gen Electric High-frequency electronic tube having novel grid mounting
US3725717A (en) * 1970-06-22 1973-04-03 A Leliovsky Grid-controlled microwave thermionic device
US3814972A (en) * 1971-07-12 1974-06-04 Varian Associates Triode electron tube with segmented cathode and vane grid
US3800378A (en) * 1972-06-07 1974-04-02 Rca Corp Method of making a directly-heated cathode

Also Published As

Publication number Publication date
FR2278154A1 (en) 1976-02-06
JPS5812971B2 (en) 1983-03-11
DE2528562A1 (en) 1976-01-29
JPS5132172A (en) 1976-03-18
CH587564A5 (en) 1977-05-13
US3917973A (en) 1975-11-04
NL7508140A (en) 1976-01-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee