GB514270A - Improvements in or relating to cathode ray tubes - Google Patents

Improvements in or relating to cathode ray tubes

Info

Publication number
GB514270A
GB514270A GB1281038A GB1281038A GB514270A GB 514270 A GB514270 A GB 514270A GB 1281038 A GB1281038 A GB 1281038A GB 1281038 A GB1281038 A GB 1281038A GB 514270 A GB514270 A GB 514270A
Authority
GB
United Kingdom
Prior art keywords
ray
screen
grid
gun
fluorescent
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
GB1281038A
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.)
ALEXANDER KONSTANTINOVICH DENI
Baird Television Ltd
Original Assignee
ALEXANDER KONSTANTINOVICH DENI
Baird Television 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 ALEXANDER KONSTANTINOVICH DENI, Baird Television Ltd filed Critical ALEXANDER KONSTANTINOVICH DENI
Priority to GB1281038A priority Critical patent/GB514270A/en
Publication of GB514270A publication Critical patent/GB514270A/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
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen

Landscapes

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

Abstract

514,270. Cathode-ray tubes. BAIRD TELEVISION, Ltd., and DENISOFF, A. K. April 29, 1938, No. 12810. [Class 39 (i)] In television &c. receivers with a modulated scanning cathode ray to produce the visual image, the ray sets up a slowly-decaying secondary electron beam at the fluorescent screen so that the light persists at each point after the scanning ray has passed on to other points. The modulated ray from the gun 2 scans the fluorescent screen 5 and secondary electrons from the screen are accelerated by a grid 4 and retarded by a grid 3 to return to the screen 5 to produce more secondary emission. High-frequency oscillations are supplied between the screen 5 and grid 4 so that the arrangement acts as a to-and-fro electron multiplier with magnetic focusing 6 and with the secondary emission dying down in one frame period. The gauzes 3, 4 are of wire of diameter one-tenth of that of the ray from the gun 2 and have a mesh ten times this ray diameter. A screen giving a suitable rate of decay of the beam may be made by adding beryllium hydroxide and caesium to ordinary fluorescent components.
GB1281038A 1938-04-29 1938-04-29 Improvements in or relating to cathode ray tubes Expired GB514270A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1281038A GB514270A (en) 1938-04-29 1938-04-29 Improvements in or relating to cathode ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1281038A GB514270A (en) 1938-04-29 1938-04-29 Improvements in or relating to cathode ray tubes

Publications (1)

Publication Number Publication Date
GB514270A true GB514270A (en) 1939-11-03

Family

ID=10011552

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1281038A Expired GB514270A (en) 1938-04-29 1938-04-29 Improvements in or relating to cathode ray tubes

Country Status (1)

Country Link
GB (1) GB514270A (en)

Similar Documents

Publication Publication Date Title
GB515947A (en) Improvements in or relating to cathode ray tube arrangements
GB488920A (en) Improvements in or relating to electron-optical systems
GB420876A (en) Braun tube
US2267823A (en) Scanning device for television
US2159568A (en) Picture-translating tube
GB514270A (en) Improvements in or relating to cathode ray tubes
GB450973A (en) Improvements in or relating to cathode-ray tubes
GB495707A (en) Improvements in or relating to focussing systems for use in electric discharge tubes
US2126288A (en) Electronic tube
GB469897A (en) Improvements in or relating to cathode ray tubes
GB551665A (en) Improvements in cathode ray tubes
GB498867A (en) Improvements in or relating to the generation of signals in television or like systems
GB442724A (en) Braun tube
GB518221A (en) Improvements in or relating to cathode ray tubes
GB505618A (en) Improvements in or relating to electron discharge devices, more particularly for television transmission systems
GB399192A (en) Television reception arrangement with braun tube
GB452125A (en) Improvements in and relating to cathode ray tubes
GB474442A (en) Improvements in or relating to cathode ray tubes and apparatus embodying the same
GB491448A (en) Improvements in or relating to electron discharge devices
GB480691A (en) Improvements in or relating to electron discharge devices
GB444775A (en) Improvements in and relating to cathode ray tubes
GB570672A (en) Improvements in or relating to cathode ray tubes
GB469404A (en) Improvements in or relating to electron discharge apparatus
GB465266A (en) Improvements in or relating to cathode ray tubes
GB455479A (en) Improvements in or relating to electrical circuits associated with cathode-ray tubes