GB739154A - Improvements in or relating to the formation of films in cathode ray tubes - Google Patents

Improvements in or relating to the formation of films in cathode ray tubes

Info

Publication number
GB739154A
GB739154A GB948352A GB948352A GB739154A GB 739154 A GB739154 A GB 739154A GB 948352 A GB948352 A GB 948352A GB 948352 A GB948352 A GB 948352A GB 739154 A GB739154 A GB 739154A
Authority
GB
United Kingdom
Prior art keywords
mist
film
envelope
cathode ray
tube
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
GB948352A
Inventor
Peter Seats
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 GB948352A priority Critical patent/GB739154A/en
Publication of GB739154A publication Critical patent/GB739154A/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
    • H01J29/18—Luminescent screens
    • H01J29/28—Luminescent screens with protective, conductive or reflective layers

Landscapes

  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

<PICT:0739154/III/1> An organic film is formed on a surface in a cathode ray tube (see Group XL (a)) envelope by introducing a mist of a solution of the film material in such a way that it does not directly impinge on the surface and then allowing the mist to settle. The solvent then evaporates to leave the film. The mist is introduced through a tube 4 having a closed end with side apertures 6. The other end 5 is at an angle to the axis of the tube. A spray gun 3 is inserted into the end 5. The mist is allowed to settle on the fluorescent screen 2 by inverting the envelope. The fluorescent screen is first wetted by low pressure steam. Any excess moisture is dispersed by centrifugal action either before or during formation of the film. The envelope may be rotated slowly in an inverted position with its axis at an angle to the vertical. The organic material may be nitro-cellulose or a polyacrylate or polystyrene resin.
GB948352A 1952-04-16 1952-04-16 Improvements in or relating to the formation of films in cathode ray tubes Expired GB739154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB948352A GB739154A (en) 1952-04-16 1952-04-16 Improvements in or relating to the formation of films in cathode ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB948352A GB739154A (en) 1952-04-16 1952-04-16 Improvements in or relating to the formation of films in cathode ray tubes

Publications (1)

Publication Number Publication Date
GB739154A true GB739154A (en) 1955-10-26

Family

ID=9872832

Family Applications (1)

Application Number Title Priority Date Filing Date
GB948352A Expired GB739154A (en) 1952-04-16 1952-04-16 Improvements in or relating to the formation of films in cathode ray tubes

Country Status (1)

Country Link
GB (1) GB739154A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712699A (en) * 1971-09-01 1973-01-23 Zenith Radio Corp Charged particle removal apparatus for an image display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712699A (en) * 1971-09-01 1973-01-23 Zenith Radio Corp Charged particle removal apparatus for an image display device

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