GB815265A - Improvements relating to cathode ray tubes - Google Patents

Improvements relating to cathode ray tubes

Info

Publication number
GB815265A
GB815265A GB31925/56A GB3192556A GB815265A GB 815265 A GB815265 A GB 815265A GB 31925/56 A GB31925/56 A GB 31925/56A GB 3192556 A GB3192556 A GB 3192556A GB 815265 A GB815265 A GB 815265A
Authority
GB
United Kingdom
Prior art keywords
potassium silicate
organic film
film
supporting
solution
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
GB31925/56A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB815265A publication Critical patent/GB815265A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

An organic film is deposited on a phosphor screen of a cathode-ray tube as a temporary step in the process of providing the screen with a metallic coating (see Group XL (a)) by floating it on the surface of a supporting solution which contains at least one water-soluble salt, e.g. potassium silicate, calcium nitrate, aluminium nitrate or trisodium phosphate, to improve the adhesion of the film and subsequently pouring off the supporting solution so that the film adheres to the surface. Potassium silicate with an average mol. ratio of K2O to SiO2 of 1:3.45 is preferred. The organic film may comprise nitrocellulose and a plasticizer in amyl acetate. The phosphor screen is first applied in the form of silicates while the solution for supporting the organic film contains potassium silicate. Specification 693,672, [Group XL (a)], is referred to.
GB31925/56A 1955-10-20 1956-10-19 Improvements relating to cathode ray tubes Expired GB815265A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US815265XA 1955-10-20 1955-10-20

Publications (1)

Publication Number Publication Date
GB815265A true GB815265A (en) 1959-06-24

Family

ID=22164755

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31925/56A Expired GB815265A (en) 1955-10-20 1956-10-19 Improvements relating to cathode ray tubes

Country Status (1)

Country Link
GB (1) GB815265A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0817233A2 (en) * 1996-06-28 1998-01-07 Philips Patentverwaltung GmbH Screen using adhesive-improving silicate layer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0817233A2 (en) * 1996-06-28 1998-01-07 Philips Patentverwaltung GmbH Screen using adhesive-improving silicate layer
EP0817233A3 (en) * 1996-06-28 1998-06-24 Philips Patentverwaltung GmbH Screen using adhesive-improving silicate layer

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