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GB851399A - Improvements in cathode assembly - Google Patents

Improvements in cathode assembly

Info

Publication number
GB851399A
GB851399A GB42180/58A GB4218058A GB851399A GB 851399 A GB851399 A GB 851399A GB 42180/58 A GB42180/58 A GB 42180/58A GB 4218058 A GB4218058 A GB 4218058A GB 851399 A GB851399 A GB 851399A
Authority
GB
United Kingdom
Prior art keywords
head
block
aperture
opening
grid
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
GB42180/58A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB851399A publication Critical patent/GB851399A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof
    • 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
    • H01J3/027—Construction of the gun or parts thereof

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • X-Ray Techniques (AREA)

Abstract

851,399. Electron beam apparatus. GENERAL ELECTRIC CO. Dec. 13, 1958 [Jan. 2, 1958], No. 42180/58. Class 39(1). A cathode structure comprises a component 13 forming a head with an opening 14, an electron emitting element 12 insulated from the head, a control grid 15 in the opening 14 connected to the head 13, a block 16 of electrical conducting material with a rear surface spaced from and facing the head, the block 16 having a cup-shaped cavity 17 facing away from the head, with an aperture 18 at the bottom of the cavity, and a shield grid 19 disposed in the aperture and connected to the block. In operation negative potential of about 1200 volts together with a square pulse voltage is applied to the control grid 15 and about 1000 volts positive or in phase A.C. voltage is applied to the shield grid 19, and the structure may be employed in an X-ray tube or electron beam generator.
GB42180/58A 1958-01-02 1958-12-31 Improvements in cathode assembly Expired GB851399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US706811A US2914692A (en) 1958-01-02 1958-01-02 Cathode assembly

Publications (1)

Publication Number Publication Date
GB851399A true GB851399A (en) 1960-10-19

Family

ID=24839141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42180/58A Expired GB851399A (en) 1958-01-02 1958-12-31 Improvements in cathode assembly

Country Status (3)

Country Link
US (1) US2914692A (en)
FR (1) FR1220244A (en)
GB (1) GB851399A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018190436A1 (en) * 2017-04-11 2018-10-18 Mapper Lithography Ip B.V. Charged particle source module

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2260927A (en) * 1940-09-09 1941-10-28 Gen Electric X Ray Corp Getter
US2316214A (en) * 1940-09-10 1943-04-13 Gen Electric X Ray Corp Control of electron flow
GB759944A (en) * 1954-03-02 1956-10-24 Gen Electric Co Ltd Improvements in or relating to electric circuit arrangements incorporating cathode ray tubes

Also Published As

Publication number Publication date
FR1220244A (en) 1960-05-23
US2914692A (en) 1959-11-24

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