GB1092581A - Improvements in and relating to filament for electron gun - Google Patents

Improvements in and relating to filament for electron gun

Info

Publication number
GB1092581A
GB1092581A GB3071/66A GB307166A GB1092581A GB 1092581 A GB1092581 A GB 1092581A GB 3071/66 A GB3071/66 A GB 3071/66A GB 307166 A GB307166 A GB 307166A GB 1092581 A GB1092581 A GB 1092581A
Authority
GB
United Kingdom
Prior art keywords
cathode
electron beam
electron gun
strip
cylindrical section
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
GB3071/66A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1092581A publication Critical patent/GB1092581A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
    • H01J37/06—Electron sources; Electron guns
    • H01J37/067—Replacing parts of guns; Mutual adjustment of electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
    • H01J37/06—Electron sources; Electron guns
    • H01J37/065—Construction of guns or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
    • H01J37/06—Electron sources; Electron guns
    • H01J37/07—Eliminating deleterious effects due to thermal effects or electric or magnetic fields

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

1,092,581. Thermionic cathode constructions; electron beam apparatus. D. SCIAKY. Jan. 24, 1966, No. 3071/66. Heading H1D. The directly-heated cathode of an electron gun is formed from a metal strip shaped to provide two spaced clamping portions and a central hollow-cylindrical section closed at one end and connected with the clamping portions by divergent portions of the strip. The closed end of the cylindrical section emits an electron beam of generally circular crosssection. The cathode is clamped between supply leads 1, 2 and bars 4, 5 for easy replacement. The strip may be of Ta or W, and the cathode may be used in electron beam welding apparatus similar to that described in Specification 1,009,987.
GB3071/66A 1964-07-31 1966-01-24 Improvements in and relating to filament for electron gun Expired GB1092581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US386725A US3274425A (en) 1964-07-31 1964-07-31 Filament for electron gun

Publications (1)

Publication Number Publication Date
GB1092581A true GB1092581A (en) 1967-11-29

Family

ID=23526789

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3071/66A Expired GB1092581A (en) 1964-07-31 1966-01-24 Improvements in and relating to filament for electron gun

Country Status (2)

Country Link
US (1) US3274425A (en)
GB (1) GB1092581A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441767A (en) * 1967-02-01 1969-04-29 Sylvania Electric Prod Tensioned directly heated cathode having improved temperature characteristics
DE3930203A1 (en) * 1989-09-09 1991-03-14 Ptr Praezisionstech Gmbh CATODE HOLDER FOR AN ELECTRONIC RADIATOR

Also Published As

Publication number Publication date
US3274425A (en) 1966-09-20

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