GB701867A - Improvements in or relating to cathode ray tubes - Google Patents

Improvements in or relating to cathode ray tubes

Info

Publication number
GB701867A
GB701867A GB30284/51A GB3028451A GB701867A GB 701867 A GB701867 A GB 701867A GB 30284/51 A GB30284/51 A GB 30284/51A GB 3028451 A GB3028451 A GB 3028451A GB 701867 A GB701867 A GB 701867A
Authority
GB
United Kingdom
Prior art keywords
cushioning liquid
metal
cone
aperture
organic film
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
GB30284/51A
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.)
Rauland Borg Corp
Original Assignee
Rauland Borg Corp
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 Rauland Borg Corp filed Critical Rauland Borg Corp
Publication of GB701867A publication Critical patent/GB701867A/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
    • H01J29/861—Vessels or containers characterised by the form or the structure thereof
    • 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
    • H01J9/221—Applying luminescent coatings in continuous layers
    • H01J9/223—Applying luminescent coatings in continuous layers by uniformly dispersing of liquid

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

701,867. Cathode-ray tubes. RAULAND CORPORATION. Dec. 28, 1951 [Dec. 29, 1950], No. 30284/51. Class 39(1) In a cathode-ray tube of the kind having a metal cone forming part of the envelope, the metal cone member is specially shaped to permit the formation of a metal backing layer for the fluorescent screen by the process described in Specification 645,633. In the embodiment shown the metal cone member 10 is formed at one end with an aperture 11 bounded by an inturned flange 12 which is sealed to a cylindrical glass neck 13 containing the electron gun of the tube. The other end of the cone is formed with an aperture 14 bounded by an outwardly directed flange 15 to which a glass face plate 16 for supporting the fluorescent screen is sealed. The process of forming the metal backing layer for the screen comprises spreading a solution of a synthetic resin and a plasticizer on the surface of a cushioning liquid and allowing a thin volatizable organic film to solidify, after which the cushioning liquid is decanted to permit the solidified film to lay evenly over the fluorescent screen. The metal layer is formed on the organic film and the film then removed by volatilization. The cone member 10 is shaped to provide a cylindrical portion 17 enclosing a transverse area substantially equal to that of the aperture 14. Hence, when the cushioning liquid is placed in the tube the surface of the cushioning liquid will have an area substantially equal to that of the screen surface on which the organic film is to be deposited. The solvent may be allowed to evaporate before decanting the cushioning liquid and the solidified organic film can be deposited directly over the fluorescent screen without tending to tear or stretch. The portion 17 of the cone member need not be exactly cylindrical and in an alternative construction corresponds to a frustum of a cone having an apex angle of not more than 10 degrees. Satisfactory results may also be obtained if the transverse area surrounded by the portion 17 is slightly greater than that of the aperture 14. The invention is also applicable to the so-called rectangular cones.
GB30284/51A 1950-12-29 1951-12-28 Improvements in or relating to cathode ray tubes Expired GB701867A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US203428A US2585614A (en) 1950-12-29 1950-12-29 Metal cone cathode-ray tube

Publications (1)

Publication Number Publication Date
GB701867A true GB701867A (en) 1954-01-06

Family

ID=22753966

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30284/51A Expired GB701867A (en) 1950-12-29 1951-12-28 Improvements in or relating to cathode ray tubes

Country Status (2)

Country Link
US (1) US2585614A (en)
GB (1) GB701867A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2785329A (en) * 1952-07-10 1957-03-12 Arthur L Tirico Expanded yoke for deflecting convergent beams
US2918670A (en) * 1953-12-29 1959-12-22 Gen Electric Luminescent presentation apparatus
US2806165A (en) * 1954-08-18 1957-09-10 Rca Corp Cathode ray tube
US2907906A (en) * 1956-05-18 1959-10-06 Gen Electric Cathode ray tube envelope
US3005125A (en) * 1957-12-05 1961-10-17 Sylvania Electric Prod Display screen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2219574A (en) * 1936-06-01 1940-10-29 Hygrade Sylvania Corp Composite glass-metal article
US2194418A (en) * 1936-09-04 1940-03-19 Hygrade Sylvania Corp Method of making a cathode-ray tube envelope
US2232098A (en) * 1938-02-11 1941-02-18 Hygrade Sylvania Corp Cathode ray tube
US2254090A (en) * 1940-04-30 1941-08-26 Rca Corp Cathode ray tube envelope
US2446440A (en) * 1947-01-28 1948-08-03 Rca Corp Color television tube
US2523406A (en) * 1949-06-25 1950-09-26 Remington Rand Inc Insulated anode for cathode-ray tubes

Also Published As

Publication number Publication date
US2585614A (en) 1952-02-12

Similar Documents

Publication Publication Date Title
GB834030A (en) Improvements in electron discharge devices used for picture reproduction in colour television systems and methods of manufacturing such devices
GB1036859A (en) Improvements in and relating to charge image storage apparatus
GB737668A (en) Tuning indicator valve of small dimension and a high sensitivity
GB701867A (en) Improvements in or relating to cathode ray tubes
GB1086489A (en) Improvements in or relating to methods of controlling the spacial distribution of an evaporated film of getter material within the evacuated vessel or tube of an electron discharge device
GB541910A (en) Cathode ray tube envelope
US2564737A (en) Cathode-ray tube
US2123957A (en) Electron tube
US2062858A (en) Method of forming a screen on material
GB655291A (en) Improvements in or relating to television pick-up tubes or the like
GB1041478A (en) Electron guns
US2625493A (en) Method of manufacturing a reflective fluorescent screen
GB692242A (en) Improvements in or relating to electron-optical image intensifiers
GB1374723A (en) Method for coating only the convex major surface of an apertured mask for a cathode-ray tube
GB1173989A (en) Improvements in or relating to Electron Image Storage and Display Devices
US2032761A (en) Fluorescent coating method
GB995180A (en) Improvements in and relating to the evaporation of material for the coating of surfaces by electronic bombardment
GB919935A (en) Improvements in and relating to getter devices
GB1070377A (en) Improvements in or relating to thermionic cathodes and to electron discharge devices employing thermionic cathodes
GB516455A (en) Improvements relating to cathode ray tubes
GB489270A (en) Photo-electric screens for television and methods of manufacturing the same
ES314044A1 (en) A cathode ray tube device. (Machine-translation by Google Translate, not legally binding)
GB637361A (en) Improvements in and relating to electron microscope
GB1216497A (en) Improvements in or relating to electron multiplier and like devices
GB1295875A (en)