GB700273A - Improvements in or relating to a process of making cathode ray tubes - Google Patents

Improvements in or relating to a process of making cathode ray tubes

Info

Publication number
GB700273A
GB700273A GB4992/52A GB499252A GB700273A GB 700273 A GB700273 A GB 700273A GB 4992/52 A GB4992/52 A GB 4992/52A GB 499252 A GB499252 A GB 499252A GB 700273 A GB700273 A GB 700273A
Authority
GB
United Kingdom
Prior art keywords
imperfections
screen
ray tubes
foil
relating
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
GB4992/52A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB700273A publication Critical patent/GB700273A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
    • G11C11/23—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using electrostatic storage on a common layer, e.g. Forrester-Haeff tubes or William tubes
    • 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
    • H01J29/021—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof arrangements for eliminating interferences in the tube
    • 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
    • H01J29/182—Luminescent screens acting upon the lighting-up of the luminescent material other than by the composition of the luminescent material, e.g. by infra red or UV radiation, heating or electric fields
    • 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
    • H01J9/44—Factory adjustment of completed discharge tubes or lamps to comply with desired tolerances

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

700,273. Cathode-ray tubes. INTERNATIONAL BUSINESS MACHINES CORPORATION. Feb. 26, 1952 [June 19, 1951], No. 4992/52. Drawings to Specification. Class 39(1) A high voltage of high frequency is applied to the outer surface of a cathode-ray tube face bearing internally a secondary emissive screen, to remove imperfections, that is areas wherever the secondary emission ratio is different from that of the majority of the screen. The imperfections are first shown, up on an oscilloscope connected to a metal foil on the outer surface of the tube face. The foil is then removed and a probe connected to a Tesla coil is applied to the areas of the screen where the imperfections are located. The cathoderay tube is used in storage systems, the foil being retained to form the signal electrode.
GB4992/52A 1951-06-19 1952-02-26 Improvements in or relating to a process of making cathode ray tubes Expired GB700273A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US232311A US2597383A (en) 1951-06-19 1951-06-19 Cathode-ray tube screen treatment

Publications (1)

Publication Number Publication Date
GB700273A true GB700273A (en) 1953-11-25

Family

ID=22872617

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4992/52A Expired GB700273A (en) 1951-06-19 1952-02-26 Improvements in or relating to a process of making cathode ray tubes

Country Status (5)

Country Link
US (1) US2597383A (en)
BE (1) BE512195A (en)
DE (1) DE926565C (en)
FR (1) FR1058490A (en)
GB (1) GB700273A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3350153A (en) * 1967-10-31 Method of and apparatus for treating the electrodes of a cold discharge tube
NL93092C (en) * 1953-02-09
SE162049C1 (en) * 1953-11-04 1958-02-04 Asea Ab
US2915662A (en) * 1956-08-24 1959-12-01 Nat Video Corp Centering arrangement and method for beams of cathode ray tubes
US3366434A (en) * 1966-10-21 1968-01-30 Teltron Inc Method for rejuvenating an image orthicon tube
US3649907A (en) * 1970-03-11 1972-03-14 Nasa Method and apparatus for mapping the sensitivity of the face of a photodetector specifically a pmt
DE2731752C2 (en) * 1977-07-14 1983-09-01 Philips Patentverwaltung Gmbh, 2000 Hamburg Device for determining small distances

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487641A (en) * 1946-09-07 1949-11-08 Philco Corp Electronic pointer for television images

Also Published As

Publication number Publication date
DE926565C (en) 1955-04-21
BE512195A (en)
US2597383A (en) 1952-05-20
FR1058490A (en) 1954-03-16

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