GB1162108A - Improvements in or relating to Thermionic Cathodes for Electron Beam Tubes - Google Patents

Improvements in or relating to Thermionic Cathodes for Electron Beam Tubes

Info

Publication number
GB1162108A
GB1162108A GB57337/66A GB5733766A GB1162108A GB 1162108 A GB1162108 A GB 1162108A GB 57337/66 A GB57337/66 A GB 57337/66A GB 5733766 A GB5733766 A GB 5733766A GB 1162108 A GB1162108 A GB 1162108A
Authority
GB
United Kingdom
Prior art keywords
cathode
dispenser
dec
relating
space
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
GB57337/66A
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 AG
Original Assignee
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 AG filed Critical Siemens AG
Publication of GB1162108A publication Critical patent/GB1162108A/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
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/02—Electron guns
    • H01J3/024—Electron guns using thermionic emission of cathode heated by electron or ion bombardment or by irradiation by other energetic beams, e.g. by laser

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Solid Thermionic Cathode (AREA)
  • Microwave Tubes (AREA)

Abstract

1,162,108. Thermionic cathode constructions. SIEMENS A.G. 22 Dec., 1966 [23 Dec., 1965], No. 57337/66. Heading H1D. A cathode arrangement, e.g. for a travelling - wave tube, includes a main plate of porous emissive material which acts, when in operation, as the target electrode of a dispenser cathode 5, whereby the main plate is both heated by electron bombardment from, and is also activated by emission promoting substance from, the auxiliary cathode. As shown, the space between the two cathodes is completely enclosed by tantalum foil cylinders 2 and 4 joined by an insulating ring 3, but alternatively this space may be unenclosed, the plate 1 being supported from the dispenser cathode by insulating pillars. The dispenser cathode 5 is of metal capillary type, the cathode 1 being of tungsten with an overlying layer of osmium or iridium.
GB57337/66A 1965-12-23 1966-12-22 Improvements in or relating to Thermionic Cathodes for Electron Beam Tubes Expired GB1162108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES0101141 1965-12-23

Publications (1)

Publication Number Publication Date
GB1162108A true GB1162108A (en) 1969-08-20

Family

ID=7523548

Family Applications (1)

Application Number Title Priority Date Filing Date
GB57337/66A Expired GB1162108A (en) 1965-12-23 1966-12-22 Improvements in or relating to Thermionic Cathodes for Electron Beam Tubes

Country Status (5)

Country Link
US (1) US3474281A (en)
DE (1) DE1251876B (en)
FR (1) FR1505956A (en)
GB (1) GB1162108A (en)
NL (1) NL6615033A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590242A (en) * 1969-06-12 1971-06-29 Gen Electric Making fused thorium carbide-tungsten cathodes for electron guns
JPS5242591B2 (en) * 1972-12-08 1977-10-25
US4046666A (en) * 1976-05-07 1977-09-06 The United States Of America As Represented By The United States Energy Research And Development Administration Device for providing high-intensity ion or electron beam
US5575027A (en) * 1995-04-18 1996-11-19 Mueller; George B. Method of supporting a chest and abdomen and apparatus therefor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2843785A (en) * 1954-04-19 1958-07-15 Sylvania Electric Prod Thermal insulation for cathode
US2830917A (en) * 1954-06-07 1958-04-15 Bell Telephone Labor Inc Cathode for electron discharge devices
US2953701A (en) * 1957-09-05 1960-09-20 High Voltage Engineering Corp Sealed-off diode with electron emitting anode
US3159461A (en) * 1958-10-20 1964-12-01 Bell Telephone Labor Inc Thermionic cathode
US3070724A (en) * 1960-05-23 1962-12-25 Sylvania Electric Prod Electron discharge device
US3348092A (en) * 1965-01-04 1967-10-17 Gen Electric Electron discharge device having a barium dispensing anode structure

Also Published As

Publication number Publication date
US3474281A (en) 1969-10-21
FR1505956A (en) 1967-12-15
NL6615033A (en) 1967-06-26
DE1251876B (en)

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees