GB851041A - Improvements in or relating to electron discharge devices and arrangements embodyingsuch devices - Google Patents

Improvements in or relating to electron discharge devices and arrangements embodyingsuch devices

Info

Publication number
GB851041A
GB851041A GB192956A GB192956A GB851041A GB 851041 A GB851041 A GB 851041A GB 192956 A GB192956 A GB 192956A GB 192956 A GB192956 A GB 192956A GB 851041 A GB851041 A GB 851041A
Authority
GB
United Kingdom
Prior art keywords
photo
cathode
electron
target
elements
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
GB192956A
Inventor
David John Gibbons
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB192956A priority Critical patent/GB851041A/en
Publication of GB851041A publication Critical patent/GB851041A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/26—Image pick-up tubes having an input of visible light and electric output
    • H01J31/48—Tubes with amplification of output effected by electron multiplier arrangements within the vacuum space

Landscapes

  • Cold Cathode And The Manufacture (AREA)

Abstract

851,041. Cathode-ray tubes. ELECTRIC & MUSICAL INDUSTRIES Ltd. Jan. 18, 1957 [Jan. 20, 1956], No. 1929/56. Class 39(1). In a discharge device, a target electrode includes a layer 6 of material exhibiting the property of bombardment induced conductivity and photo-electrically emissive conducting elements 7, which become charged by the induced conductivity in dependence on the intensity of bombarding electrons and which can be scanned by a light spot through a mesh electrode 8 which limits the equilibrium potential attained by elements 7 during scanning. In the television pick-up tube shown bombarding electrons from photo-cathode 2 are focused onto an electron-permeable, light opaque conducting film 5 of the target by a coil 12 surrounded by a high permeability mu-metal screen 12a. Electrons released from elements 7 by the scanning light spot from tube 10 are directed into an electron multiplier 13. In an alternative device for use in television standards conversion the photo-electric cathode is replaced by an electron gun producing an electron beam modulated by received signals and scanned over the target.
GB192956A 1956-01-20 1956-01-20 Improvements in or relating to electron discharge devices and arrangements embodyingsuch devices Expired GB851041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB192956A GB851041A (en) 1956-01-20 1956-01-20 Improvements in or relating to electron discharge devices and arrangements embodyingsuch devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB192956A GB851041A (en) 1956-01-20 1956-01-20 Improvements in or relating to electron discharge devices and arrangements embodyingsuch devices

Publications (1)

Publication Number Publication Date
GB851041A true GB851041A (en) 1960-10-12

Family

ID=9730498

Family Applications (1)

Application Number Title Priority Date Filing Date
GB192956A Expired GB851041A (en) 1956-01-20 1956-01-20 Improvements in or relating to electron discharge devices and arrangements embodyingsuch devices

Country Status (1)

Country Link
GB (1) GB851041A (en)

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