GB550655A - Improvements in or relating to cathode ray tubes - Google Patents

Improvements in or relating to cathode ray tubes

Info

Publication number
GB550655A
GB550655A GB891841A GB891841A GB550655A GB 550655 A GB550655 A GB 550655A GB 891841 A GB891841 A GB 891841A GB 891841 A GB891841 A GB 891841A GB 550655 A GB550655 A GB 550655A
Authority
GB
United Kingdom
Prior art keywords
cathode
ring
ray tubes
relating
cathode ray
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
GB891841A
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.)
KURT ARTHUR RICHARD SAMSON
Cinema Television Ltd
Original Assignee
KURT ARTHUR RICHARD SAMSON
Cinema 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 KURT ARTHUR RICHARD SAMSON, Cinema Television Ltd filed Critical KURT ARTHUR RICHARD SAMSON
Priority to GB891841A priority Critical patent/GB550655A/en
Publication of GB550655A publication Critical patent/GB550655A/en
Priority to DEC3096A priority patent/DE947252C/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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes
    • 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
    • H01J29/04—Cathodes

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

550,655. Cathode-ray tubes. CINEMA-TELEVISION, Ltd., and SAMSON, K. A. R. July 15, 1941, No. 8918. [Class 39 (i)] To reduce dark current in a cathode-ray tube a ring 7 or a narrow annulus of metal is arranged behind the cathode 4 and is connected to a negative potential relative to the cathode so that electrons wandermg from the beam into regions behind the cathode are repelled. The ring 7 may be connected to the modulating electrode 6, for example by being mounted on the same support wires. To reduce highfrequency heating during manufacture the ring may be gapped. The cathode may be ; indirectly-heated as shown or directly heated.
GB891841A 1941-07-15 1941-07-15 Improvements in or relating to cathode ray tubes Expired GB550655A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB891841A GB550655A (en) 1941-07-15 1941-07-15 Improvements in or relating to cathode ray tubes
DEC3096A DE947252C (en) 1941-07-15 1950-10-03 Cathode ray tubes for television purposes with intensity-controlled electron beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB891841A GB550655A (en) 1941-07-15 1941-07-15 Improvements in or relating to cathode ray tubes

Publications (1)

Publication Number Publication Date
GB550655A true GB550655A (en) 1943-01-19

Family

ID=9861820

Family Applications (1)

Application Number Title Priority Date Filing Date
GB891841A Expired GB550655A (en) 1941-07-15 1941-07-15 Improvements in or relating to cathode ray tubes

Country Status (2)

Country Link
DE (1) DE947252C (en)
GB (1) GB550655A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE689003C (en) * 1936-10-01 1940-03-08 Heinz Boucke alepipes

Also Published As

Publication number Publication date
DE947252C (en) 1956-08-16

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