GB468483A - Improvements in or relating to television or like electrical image transmitting systems - Google Patents

Improvements in or relating to television or like electrical image transmitting systems

Info

Publication number
GB468483A
GB468483A GB21448/36A GB2144836A GB468483A GB 468483 A GB468483 A GB 468483A GB 21448/36 A GB21448/36 A GB 21448/36A GB 2144836 A GB2144836 A GB 2144836A GB 468483 A GB468483 A GB 468483A
Authority
GB
United Kingdom
Prior art keywords
electrode
sheet
secondary electrons
television
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
GB21448/36A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB468483A publication Critical patent/GB468483A/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
    • H01J29/43—Charge-storage screens using photo-emissive mosaic, e.g. for orthicon, for iconoscope
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • 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
    • H01J31/40—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having grid-like image screen through which the electron ray passes and by which the ray is influenced before striking the output electrode, i.e. having "triode action"

Abstract

468,483. Cathode-ray tubes. STANDARD TELEPHONES & CABLES, Ltd. Aug. 4, 1936, No. 21448. Convention date, Aug. 3, 1935. [Class 39 (i)] An electronic scanning device for television and like image transmission systems comprises a primary electron beam generating means 1, 2, 3, and a photo-electric control electrode 7, between which is interposed a thin sheet 6 of metal treated to emit secondary electrons, whereby when the sheet is bombarded by the primary scanning beam a moving beam of secondary electrons is generated adjacent the face of the electrode, 7. The electrode 7 is a metal grid coated with insulation which carries a mosaic of insulated photo-electric elements which when illuminated assume potentials corresponding to the picture. The moving beam of secondary electrons is modulated by these elements and the resultant picture signal current flows to anode 8. Electrostatic deflecting plates 4, 4<1> scan the primary electron beam. The metallic portion of electrode 7 is maintained negative with respect to the sheet 6. The Specification as open to inspection under Sect. 91 includes also the replacement of the sheet 6 by any screen electrode producing a beam of electrons of decreased velocity adjacent the face of the control electrode for example a mesh grid at negative potential with respect to the cathode. In another modification, Fig. 4 (Cancelled), the photoelectric elements 23 are applied to one side only of the supporting grid 21, which itself acts as a decelerating screen. This subjectmatter does not appear in the Specification as accepted.
GB21448/36A 1935-08-03 1936-08-04 Improvements in or relating to television or like electrical image transmitting systems Expired GB468483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP468483X 1935-08-03

Publications (1)

Publication Number Publication Date
GB468483A true GB468483A (en) 1937-07-06

Family

ID=12758742

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21448/36A Expired GB468483A (en) 1935-08-03 1936-08-04 Improvements in or relating to television or like electrical image transmitting systems

Country Status (6)

Country Link
US (1) US2300591A (en)
BE (2) BE468483A (en)
DE (1) DE888561C (en)
FR (1) FR808937A (en)
GB (1) GB468483A (en)
NL (1) NL45477C (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB499828A (en) * 1937-07-28 1939-01-30 Baird Television Ltd Improvements in or relating to electron discharge devices for use in television and like systems
DE756553C (en) * 1938-02-16 1958-04-24 Fernseh Gmbh Saving image catcher tubes with cathode ray scanning and two separate mosaic electrodes lying close and parallel to one another
US2213174A (en) * 1938-07-30 1940-08-27 Rca Corp Television transmitting tube
US2615991A (en) * 1948-06-11 1952-10-28 Rca Corp Sound reproducing method and system
US2641723A (en) * 1950-07-29 1953-06-09 Capehart Farnsworth Corp Television image analyzing tube
US2777970A (en) * 1950-10-03 1957-01-15 Paul K Weimer Television camera storage tube
US2798179A (en) * 1952-01-23 1957-07-02 Sheldon Edward Emanuel System for reproducing invisible images
DE1102707B (en) * 1956-11-15 1961-03-23 Hubert Salmen Hollow bodies, such as containers, pipes or the like, for corrosive substances
US3243643A (en) * 1962-09-19 1966-03-29 Itt Image storage tube

Also Published As

Publication number Publication date
US2300591A (en) 1942-11-03
FR808937A (en) 1937-02-18
BE416614A (en)
NL45477C (en)
BE468483A (en)
DE888561C (en) 1953-09-03

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