GB524354A - Improvements in or relating to the manufacture of metal mesh electrodes for use in cathode ray tubes - Google Patents

Improvements in or relating to the manufacture of metal mesh electrodes for use in cathode ray tubes

Info

Publication number
GB524354A
GB524354A GB297239A GB297239A GB524354A GB 524354 A GB524354 A GB 524354A GB 297239 A GB297239 A GB 297239A GB 297239 A GB297239 A GB 297239A GB 524354 A GB524354 A GB 524354A
Authority
GB
United Kingdom
Prior art keywords
mesh
backing
layer
clay
cathode ray
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
GB297239A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB297239A priority Critical patent/GB524354A/en
Publication of GB524354A publication Critical patent/GB524354A/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
    • H01J29/36—Photoelectric screens; Charge-storage screens
    • H01J29/39—Charge-storage screens
    • H01J29/41—Charge-storage screens using secondary emission, e.g. for supericonoscope
    • H01J29/413—Charge-storage screens using secondary emission, e.g. for supericonoscope for writing and reading of charge pattern on opposite sides of the target, e.g. for superorthicon
    • H01J29/416—Charge-storage screens using secondary emission, e.g. for supericonoscope for writing and reading of charge pattern on opposite sides of the target, e.g. for superorthicon with a matrix of electrical conductors traversing the target

Landscapes

  • Electrolytic Production Of Metals (AREA)

Abstract

524,354. Cathode-ray tubes. HOLMAN, H. E. Jan. 28, 1939, No. 2972. [Class 39 (i)] A mosaic screen for use in producing signals in television is formed by (i) Coating an electrically conducting mesh with an insulator ; the mesh 1 may be of nickel and produced as described in Specification 490,537, the insulation 2 being a sprayed enamel or kaolin, bentonite or alumina in colloidal form deposited by cataphoresis. (ii) Providing the coated mesh with a temporary backing 3 of finely divided graphite or clay ; this can be effected by placing the mesh on a colloidal suspension of the graphite or clay. (iii) Depositing an isolating layer 4 on the mesh on the side opposite to the backing 3 ; this layer may be of lamp black or magnesium oxide. (iv) Depositing an electrically conducting layer 12, which may be of silver, over the mesh with the layer 4 ; this conducting layer will cover the interstices of the insulated mesh and one side of the temporary backing. (v) The isolating layer with its metal is next removed ; if of lamp black by washing or otherwise by any suitable solvent. (vi) Finally, the backing is removed ; this may be dissolved by hydrochloric acid. If desired, the coated mesh so formed may then be mounted in a frame and placed in an electro-plating bath to thicken the silver deposit. In place of carbon as an isolating layer cellulose acetate or an oil film may be used. In place of clay as a temporary backing, a volatile body such as camphor may be used ; with volatile backing its removal may be effected in the cathode ray tube after the mosaic has been mounted in position.
GB297239A 1939-01-28 1939-01-28 Improvements in or relating to the manufacture of metal mesh electrodes for use in cathode ray tubes Expired GB524354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB297239A GB524354A (en) 1939-01-28 1939-01-28 Improvements in or relating to the manufacture of metal mesh electrodes for use in cathode ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB297239A GB524354A (en) 1939-01-28 1939-01-28 Improvements in or relating to the manufacture of metal mesh electrodes for use in cathode ray tubes

Publications (1)

Publication Number Publication Date
GB524354A true GB524354A (en) 1940-08-05

Family

ID=9749500

Family Applications (1)

Application Number Title Priority Date Filing Date
GB297239A Expired GB524354A (en) 1939-01-28 1939-01-28 Improvements in or relating to the manufacture of metal mesh electrodes for use in cathode ray tubes

Country Status (1)

Country Link
GB (1) GB524354A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2539442A (en) * 1946-07-01 1951-01-30 Farnsworth Res Corp Process of preparing a double-sided mosaic electrode
US2682501A (en) * 1948-12-29 1954-06-29 Bell Telephone Labor Inc Preparation of two-sided mosaic
US3100295A (en) * 1960-01-25 1963-08-06 Telefunken Gmbh Method of making magnetic matrices and resulting article

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2539442A (en) * 1946-07-01 1951-01-30 Farnsworth Res Corp Process of preparing a double-sided mosaic electrode
US2682501A (en) * 1948-12-29 1954-06-29 Bell Telephone Labor Inc Preparation of two-sided mosaic
US3100295A (en) * 1960-01-25 1963-08-06 Telefunken Gmbh Method of making magnetic matrices and resulting article

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