GB665877A - Improvements in or relating to circuit arrangements embodying cathode ray tubes - Google Patents

Improvements in or relating to circuit arrangements embodying cathode ray tubes

Info

Publication number
GB665877A
GB665877A GB3072/48A GB307248A GB665877A GB 665877 A GB665877 A GB 665877A GB 3072/48 A GB3072/48 A GB 3072/48A GB 307248 A GB307248 A GB 307248A GB 665877 A GB665877 A GB 665877A
Authority
GB
United Kingdom
Prior art keywords
layer
cathode
signal plate
conductive
target
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
GB3072/48A
Inventor
Hans Gerhard Lubszynski
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 GB3072/48A priority Critical patent/GB665877A/en
Priority to US72863A priority patent/US2555091A/en
Priority to FR979860D priority patent/FR979860A/en
Publication of GB665877A publication Critical patent/GB665877A/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
    • H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
    • H01J31/34—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having regulation of screen potential at cathode potential, e.g. orthicon
    • H01J31/38—Tubes with photoconductive screen, e.g. vidicon

Landscapes

  • Radar Systems Or Details Thereof (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

665,877. Cathode-ray tubes. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Jan. 13, 1949 [Feb. 3, 1948], No. 3072/48. Class 39 (i). The target electrode of a cathode-ray tube comprises a photo-conductive layer and a conductive signal plate and it is scanned by a lowvelocity beam so that the equlibrium potential of the scanned surface corresponds substantially to that of the cathode, the signal plate being maintained at a positive potential relative to said cathode. The target 2 is composed of a layer 3 of glass or mica on one side of which are two layers, one a semi-transparent signal plate 4 and the other a layer 5 of photo-conductive material, e.g. zinc selenide. The electron gun comprises a cathode 6, shield 7, an apertured anode 8 and a metallic wall coating 9. Near to the target is a decelerating electrode 10, the various electrodes being suitably connected to the potentiometer 11, 12. Scanning coils 13 and focusing coils 14 control the beam. The signal plate 4 is connected to an impedance 15 and is maintained a few volts positive with respect to the cathode. When light falls on the layer 5, the area becomes conductive and the potential of the surface of the layer 5 rises, the scanning-beam giving an appropriate signal. The apparatus is suitable for radar and television transmission. Specifications 463,297, 465,060 and 540,034 are referred to. The Provisional Specification states that the photoconductive layer may be replaced by a photovoltaic layer as in Specification 462,550.
GB3072/48A 1948-02-03 1948-02-03 Improvements in or relating to circuit arrangements embodying cathode ray tubes Expired GB665877A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3072/48A GB665877A (en) 1948-02-03 1948-02-03 Improvements in or relating to circuit arrangements embodying cathode ray tubes
US72863A US2555091A (en) 1948-02-03 1949-01-26 Cathode-ray tube
FR979860D FR979860A (en) 1948-02-03 1949-02-01 Cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3072/48A GB665877A (en) 1948-02-03 1948-02-03 Improvements in or relating to circuit arrangements embodying cathode ray tubes

Publications (1)

Publication Number Publication Date
GB665877A true GB665877A (en) 1952-01-30

Family

ID=9751460

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3072/48A Expired GB665877A (en) 1948-02-03 1948-02-03 Improvements in or relating to circuit arrangements embodying cathode ray tubes

Country Status (3)

Country Link
US (1) US2555091A (en)
FR (1) FR979860A (en)
GB (1) GB665877A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB683603A (en) * 1948-02-18 1952-12-03 Emi Ltd Improvements in or relating to electron discharge pick-up tubes suitable for use in television
US3003075A (en) * 1950-12-05 1961-10-03 Rca Corp Infra-red sensitive devices
NL165997B (en) * 1950-12-16 Pechiney Saint Gobain PROCESS FOR PREPARING SILICA GEL.
US2864031A (en) * 1950-12-30 1958-12-09 Rca Corp Electrical storage tube
US2973445A (en) * 1951-03-09 1961-02-28 Machlett Lab Inc Device for detection, conversion, and amplification of x-ray images
US2749463A (en) * 1951-10-24 1956-06-05 Bell Telephone Labor Inc Solid state television pick-up tube
US2699512A (en) * 1951-11-21 1955-01-11 Sheldon Edward Emanuel Camera for invisible radiation images
US2816954A (en) * 1952-10-23 1957-12-17 David A Huffman Infra-red television camera
BE529546A (en) * 1953-06-13
US3321656A (en) * 1954-03-11 1967-05-23 Edward E Sheldon Television camera tube with lead oxide screen
US3087087A (en) * 1956-02-28 1963-04-23 Gen Dynamics Corp Electron beam control apparatus for light responsive display tubes
US2911562A (en) * 1957-09-20 1959-11-03 Thompson Ramo Wooldridge Inc Television camera circuits
NL233650A (en) * 1957-11-27

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1747988A (en) * 1925-05-27 1930-02-18 Gen Electric Transmission of pictures and views
GB455123A (en) * 1935-02-09 1936-10-09 Hans Gerhard Lubszynski Improvements in and relating to television
US2324504A (en) * 1940-11-28 1943-07-20 Rca Corp Television transmitting system
US2404046A (en) * 1941-06-21 1946-07-16 Rca Corp Television transmitting apparatus
US2404098A (en) * 1941-06-27 1946-07-16 Rca Corp Television transmitting system
US2415842A (en) * 1943-01-30 1947-02-18 Bell Telephone Labor Inc Electrooptical device
US2407485A (en) * 1944-06-01 1946-09-10 Farnsworth Television & Radio Television control system
US2489127A (en) * 1947-06-14 1949-11-22 Rca Corp High capacitance target

Also Published As

Publication number Publication date
US2555091A (en) 1951-05-29
FR979860A (en) 1951-05-04

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