GB469404A - Improvements in or relating to electron discharge apparatus - Google Patents

Improvements in or relating to electron discharge apparatus

Info

Publication number
GB469404A
GB469404A GB220736A GB220736A GB469404A GB 469404 A GB469404 A GB 469404A GB 220736 A GB220736 A GB 220736A GB 220736 A GB220736 A GB 220736A GB 469404 A GB469404 A GB 469404A
Authority
GB
United Kingdom
Prior art keywords
grids
electron
cathode
grid
wires
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
GB220736A
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
Priority to GB220736A priority Critical patent/GB469404A/en
Publication of GB469404A publication Critical patent/GB469404A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J43/00Secondary-emission tubes; Electron-multiplier tubes
    • H01J43/04Electron multipliers
    • H01J43/06Electrode arrangements
    • H01J43/18Electrode arrangements using essentially more than one dynode
    • H01J43/22Dynodes consisting of electron-permeable material, e.g. foil, grid, tube, venetian blind
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/023Electrodes; Screens; Mounting, supporting, spacing or insulating thereof secondary-electron emitting electrode arrangements

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

469,404. Cathode-ray tubes. WILLIAMS, W. E. Jan. 23, 1936, No. 2207. [Class 39 (i)] In discharge tubes with an electron beam the electron density at any point of which is representative of the brightness of a corresponding optical image, the beam undergoes impacts with a series of wire grids emitting secondary electrons and so oriented that the lines in the pattern introduced into the electron image by the wires of one grid lie in directions inclined, for example, at 45‹ to the wires of the next grid. Successive grids may be closely adjacent or spaced apart with electron lenses between them. An optical image of an object 21 is thrown on a photo-electric cathode 23 in the evacuated vessel 24 containing secondary emitting grids 26, 27, 29, 30, 32. Electrostatic lenses 25, 28, 31 are provided between each pair of grids or as shown between alternate pairs. More than two closely adjacent grids may be used and grids may also be mounted adjacent to the cathode 23. When the final electron image is magnetically deflected in space to produce scanning and television signals, the final grid is of magnetic material to screen the electrons striking it from the magnetic fields. The other grids are of silver or silver coated with alkaline metal such as caesium or potassium.
GB220736A 1936-01-23 1936-01-23 Improvements in or relating to electron discharge apparatus Expired GB469404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB220736A GB469404A (en) 1936-01-23 1936-01-23 Improvements in or relating to electron discharge apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB220736A GB469404A (en) 1936-01-23 1936-01-23 Improvements in or relating to electron discharge apparatus

Publications (1)

Publication Number Publication Date
GB469404A true GB469404A (en) 1937-07-23

Family

ID=9735473

Family Applications (1)

Application Number Title Priority Date Filing Date
GB220736A Expired GB469404A (en) 1936-01-23 1936-01-23 Improvements in or relating to electron discharge apparatus

Country Status (1)

Country Link
GB (1) GB469404A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281599B (en) * 1962-11-16 1968-10-31 Philips Nv Electronic image intensifier with secondary electron multiplication and method for producing an electrode system for the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1281599B (en) * 1962-11-16 1968-10-31 Philips Nv Electronic image intensifier with secondary electron multiplication and method for producing an electrode system for the same

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