GB789846A - Improvements in or relating to electric discharge tubes having a conductive wall coating and methods of manufacturing such coatings - Google Patents

Improvements in or relating to electric discharge tubes having a conductive wall coating and methods of manufacturing such coatings

Info

Publication number
GB789846A
GB789846A GB408456A GB408456A GB789846A GB 789846 A GB789846 A GB 789846A GB 408456 A GB408456 A GB 408456A GB 408456 A GB408456 A GB 408456A GB 789846 A GB789846 A GB 789846A
Authority
GB
United Kingdom
Prior art keywords
coatings
relating
conductive wall
manufacturing
methods
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
GB408456A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB789846A publication Critical patent/GB789846A/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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
    • 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

Landscapes

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

Abstract

789,846. Discharge apparatus. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 9, 1956 [Feb. 12, 1955], No. 4084/56. Class 39(1). The conductive wall coating in for example a cathode ray tube consists of a mixture of waterglass and graphite, the molecular ratio of alkaline oxide to silicon dioxide in the waterglass being between 1 : 5 and 1 : 7. The coating may also contain an organic swelling agent and is preferably applied by spraying the tube wall which is preheated to 50‹ to 80‹C.
GB408456A 1955-02-12 1956-02-09 Improvements in or relating to electric discharge tubes having a conductive wall coating and methods of manufacturing such coatings Expired GB789846A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP13568A DE1035279B (en) 1955-02-12 1955-02-12 Electrical discharge vessel, in particular electron beam tube, with conductive wall coating and method for applying such coatings

Publications (1)

Publication Number Publication Date
GB789846A true GB789846A (en) 1958-01-29

Family

ID=7364687

Family Applications (1)

Application Number Title Priority Date Filing Date
GB408456A Expired GB789846A (en) 1955-02-12 1956-02-09 Improvements in or relating to electric discharge tubes having a conductive wall coating and methods of manufacturing such coatings

Country Status (3)

Country Link
DE (1) DE1035279B (en)
GB (1) GB789846A (en)
NL (1) NL204440A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1274741B (en) * 1966-08-31 1968-08-08 Telefunken Patent Process for the production of an electrically conductive coating on the inner surface of a vacuum cover for an electron tube

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE410862A (en) * 1934-08-17
US2162391A (en) * 1935-04-18 1939-06-13 Firm Of Fernseh Ag Electron tube with high ohmic wall coatings
DE699570C (en) * 1936-11-03 1940-12-02 Fernseh Gmbh Pistons for cathode ray tubes with blackened inner wall
DE886787C (en) * 1945-02-09 1953-08-17 Lorenz C Ag Blackening compound for pistons for picture tubes

Also Published As

Publication number Publication date
NL204440A (en)
DE1035279B (en) 1958-07-31

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