GB695335A - Improvements relating to a method of preparing luminescent screens - Google Patents

Improvements relating to a method of preparing luminescent screens

Info

Publication number
GB695335A
GB695335A GB18879/51A GB1887951A GB695335A GB 695335 A GB695335 A GB 695335A GB 18879/51 A GB18879/51 A GB 18879/51A GB 1887951 A GB1887951 A GB 1887951A GB 695335 A GB695335 A GB 695335A
Authority
GB
United Kingdom
Prior art keywords
silicate
acid
tube
phosphor
water
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
GB18879/51A
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.)
Edison Swan Electric Co Ltd
Original Assignee
Edison Swan Electric Co 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 Edison Swan Electric Co Ltd filed Critical Edison Swan Electric Co Ltd
Publication of GB695335A publication Critical patent/GB695335A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Abstract

695,335. Luminescent screens. EDISON SWAN ELECTRIC CO., Ltd. Aug. 10, 1951 [Aug. 31, 1950], No. 18879/51. Class 39(i) A method of forming a luminescent screen consists in settling a phosphor on to a supporting surface, such as the face of a cathode ray tube, from a suspension in an acidified solution of an alkali silicate having a pH in the range 6 to 7.5. The solution may be potassium or sodium silicate acidified with phosphoric, sulphuric, acetic, oxalic or hydrochloric acid or an acid salt such as sodium hydrogen sulphate or sodium dihydrogen phosphate. Potassium silicate and phosphoric acid are preferred. The settling process comprises placing in the tube a cushion consisting of water, a water solution of the acid or acidifying agent or the silicate, or the silica so] produced by mixing them. The phosphor is suspended in water which may also contain some or all of the acid or acidifying agent or the silicate or the silica sol. The phosphor suspension is added to the tube prior to, during, or after formation of the silica sol bath in the cushioning layer. After a time depending on the silicate concentration and temperature, and which may be as short as 12 mins., the tube is inverted so that the liquid pours off.
GB18879/51A 1950-08-31 1951-08-10 Improvements relating to a method of preparing luminescent screens Expired GB695335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US695335XA 1950-08-31 1950-08-31

Publications (1)

Publication Number Publication Date
GB695335A true GB695335A (en) 1953-08-05

Family

ID=22089624

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18879/51A Expired GB695335A (en) 1950-08-31 1951-08-10 Improvements relating to a method of preparing luminescent screens

Country Status (1)

Country Link
GB (1) GB695335A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873205A (en) * 1955-03-22 1959-02-10 Philips Corp Process for forming luminescent screens
US3647522A (en) * 1970-04-29 1972-03-07 Motorola Inc Method of reclaiming and coating phosphor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873205A (en) * 1955-03-22 1959-02-10 Philips Corp Process for forming luminescent screens
US3647522A (en) * 1970-04-29 1972-03-07 Motorola Inc Method of reclaiming and coating phosphor

Similar Documents

Publication Publication Date Title
GB695335A (en) Improvements relating to a method of preparing luminescent screens
GB683596A (en) Improvements in or relating to cathode ray tubes
BR8405277A (en) PROCESS FOR MANUFACTURING A DETERGENT PO
GB1040462A (en) A process for the manufacture of wet-precipitated silica
JPS5790843A (en) Forming method of fluorescent screen of picture tube
ES257899A1 (en) Improvements in or relating to process for the manufacture of therapeutic useful preparations of iron
GB1263552A (en) Phosphor screen fabrication
GB816581A (en) Process for the preparation of silica sols
GB841845A (en) Improvements relating to the manufacture of fluorescent screens
JPS5218497A (en) Process for electrolysis of the solution of alkali metal halide
GB821635A (en) Improvements in or relating to the manufacture of luminescent screens
GB480113A (en) Process for producing aerated cementitious compositions and articles
GB252210A (en) Improvements in or relating to the process of making mortars and cements
GB607540A (en) A process for the electrolytic reduction of poly-hydroxy-carboxylic acid lactones
GB739371A (en) Improvements in or relating to the deposition of adherent layers of powdered material on surfaces by a settling process
GB304441A (en) The manufacture of naphthol ether carboxy-amides and aminonaphthol ethers
GB271564A (en) Improvements in the manufacture and production of adsorbents
GB691132A (en) Improvements in or relating to cathode-ray tubes
SU62264A1 (en) The method of regeneration and enrichment of corundum
GB719269A (en) Improvements relating to the manufacture of electric discharge lamps
GB271725A (en) Improvements in or relating to methods of making peroxides of organic acids
GB329888A (en) Process for the iodination of ortho-oxy-quinoline-ana-sulphonic acid
GB405964A (en) Improvements in or relating to processes for the manufacture of luminescent screens suitable for use in braun tubes and like apparatus
GB607684A (en) Improvements in or relating to luminescent screens for use in cathode ray tubes and methods of making such screens
GB677491A (en) Improved process for the electrolysis of solutions of alkali metal chlorides