GB721948A - Improvements in or relating to television pick-up cathode ray tubes - Google Patents

Improvements in or relating to television pick-up cathode ray tubes

Info

Publication number
GB721948A
GB721948A GB1627351A GB1627351A GB721948A GB 721948 A GB721948 A GB 721948A GB 1627351 A GB1627351 A GB 1627351A GB 1627351 A GB1627351 A GB 1627351A GB 721948 A GB721948 A GB 721948A
Authority
GB
United Kingdom
Prior art keywords
insulating
layer
television pick
photo
relating
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
GB1627351A
Inventor
Kurt Josef Frank
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.)
Teledyne UK Ltd
Original Assignee
English Electric Valve Co 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 English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Priority to GB1627351A priority Critical patent/GB721948A/en
Priority to FR1057261D priority patent/FR1057261A/en
Priority to DEE5731A priority patent/DE935249C/en
Publication of GB721948A publication Critical patent/GB721948A/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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/36—Photoelectric screens; Charge-storage screens
    • H01J29/39—Charge-storage screens
    • H01J29/45—Charge-storage screens exhibiting internal electric effects caused by electromagnetic radiation, e.g. photoconductive screen, photodielectric screen, photovoltaic screen

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

721,948. Television pick-up tubes. ENGLISH ELECTRIC VALVE CO., Ltd. March 17, 1952 [July 9, 1951]. No. 16273/51. Drawings to Specification. Class 39 (1). The target for a television pick-up tube comprises a transparent signal layer 2 covered by a coating of insulating material applied e.g. through a mesh to form insulating squares or areas, and a layer of photo-conductive material which is only in electrical contact with the signal layer at the gaps between the insulating squares or areas. The insulating material may be SiO 2 applied by evaporation in vacuo. Control of the thickness of the photo conductive layer and of the size of the insulating portions enables the effective resistivity and the time-constant of the target to be adjusted and for photo conductive material of otherwise low resistance to be'used. In a modification the insulating layer is continuous with holes therethrough giving electrical contact between the photo conductive layer and the base.
GB1627351A 1951-07-09 1951-07-09 Improvements in or relating to television pick-up cathode ray tubes Expired GB721948A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1627351A GB721948A (en) 1951-07-09 1951-07-09 Improvements in or relating to television pick-up cathode ray tubes
FR1057261D FR1057261A (en) 1951-07-09 1952-05-20 Improvements to cathode ray television viewing tubes
DEE5731A DE935249C (en) 1951-07-09 1952-07-09 Improvements to television picture catcher tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1627351A GB721948A (en) 1951-07-09 1951-07-09 Improvements in or relating to television pick-up cathode ray tubes

Publications (1)

Publication Number Publication Date
GB721948A true GB721948A (en) 1955-01-19

Family

ID=10074340

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1627351A Expired GB721948A (en) 1951-07-09 1951-07-09 Improvements in or relating to television pick-up cathode ray tubes

Country Status (3)

Country Link
DE (1) DE935249C (en)
FR (1) FR1057261A (en)
GB (1) GB721948A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3268764A (en) * 1963-01-09 1966-08-23 Westinghouse Electric Corp Radiation sensitive device
US3405298A (en) * 1965-03-04 1968-10-08 Rca Corp Photoconductive device having a target including a selenium blocking layer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1706185A (en) * 1925-05-27 1929-03-19 Gen Electric Transmission of pictures and views

Also Published As

Publication number Publication date
DE935249C (en) 1955-11-17
FR1057261A (en) 1954-03-08

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