ES334173A1 - Method and apparatus for adjusting interelectrode spacing in a cathode-ray tube - Google Patents

Method and apparatus for adjusting interelectrode spacing in a cathode-ray tube

Info

Publication number
ES334173A1
ES334173A1 ES334173A ES334173A ES334173A1 ES 334173 A1 ES334173 A1 ES 334173A1 ES 334173 A ES334173 A ES 334173A ES 334173 A ES334173 A ES 334173A ES 334173 A1 ES334173 A1 ES 334173A1
Authority
ES
Spain
Prior art keywords
cathode
layer
planing
support
thickness
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
ES334173A
Other languages
Spanish (es)
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES334173A1 publication Critical patent/ES334173A1/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
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • 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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns
    • H01J29/485—Construction of the gun or of parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49082—Resistor making
    • Y10T29/49099—Coating resistive material on a base

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

A method of manufacturing an oxide-coated cathode for use in a cathode ray tube in which a carbonate layer provided on a cathode support and originally of excessive thickness is reduced to the correct thickness by mechanical means (knife 7 in Fig.1, not shown) or by pressing until the quotient of layer thickness and dielectric constant, as determined by a circuit arranged to measure the capacitance between the support and a measuring electrode adjacent the free surface of the layer, is constant. The planing apparatus of Fig.1 (not shown) including the support (1), the measuring electrode (8) and the layer (2), may be included in a bridge circuit, a servomechanism being connected between the bridge circuit and planing drive for automatic control. The planing movements may be reduced to two by noting the layer thickness to dielectric constant ratio after the first action, The operative diameter of the measuring electrode is preferably the same as that of the aperture in the first control electrode of an electron gun into which the cathode is to be incorporated. Cathodes of rectangular cross-section are instanced.
ES334173A 1965-12-07 1966-12-05 Method and apparatus for adjusting interelectrode spacing in a cathode-ray tube Expired ES334173A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6515843A NL6515843A (en) 1965-12-07 1965-12-07

Publications (1)

Publication Number Publication Date
ES334173A1 true ES334173A1 (en) 1968-01-16

Family

ID=19794836

Family Applications (2)

Application Number Title Priority Date Filing Date
ES334173A Expired ES334173A1 (en) 1965-12-07 1966-12-05 Method and apparatus for adjusting interelectrode spacing in a cathode-ray tube
ES344092A Expired ES344092A1 (en) 1965-12-07 1967-08-12 Method and apparatus for adjusting interelectrode spacing in a cathode-ray tube

Family Applications After (1)

Application Number Title Priority Date Filing Date
ES344092A Expired ES344092A1 (en) 1965-12-07 1967-08-12 Method and apparatus for adjusting interelectrode spacing in a cathode-ray tube

Country Status (8)

Country Link
US (1) US3456311A (en)
BE (1) BE690736A (en)
CH (1) CH462961A (en)
DE (1) DE1564473A1 (en)
ES (2) ES334173A1 (en)
FR (1) FR1504170A (en)
GB (1) GB1151438A (en)
NL (1) NL6515843A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534455A (en) * 1968-05-03 1970-10-20 Us Army Method of making thermionic cathodes
JP5296434B2 (en) 2008-07-16 2013-09-25 富士フイルム株式会社 Master for lithographic printing plate

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3330696A (en) * 1967-07-11 Method of fabricating thin film capacitors
US2321413A (en) * 1941-07-28 1943-06-08 Raymond C Palmer Planer and shaper attachment for lathes
BE517981A (en) * 1952-02-27
BE563664A (en) * 1957-01-03
US3045320A (en) * 1959-03-12 1962-07-24 Raytheon Co Impregnated cathodes
US3299332A (en) * 1961-07-10 1967-01-17 Murata Manufacturing Co Semiconductive capacitor and the method of manufacturing the same
US3150021A (en) * 1961-07-25 1964-09-22 Nippon Electric Co Method of manufacturing semiconductor devices
US3261082A (en) * 1962-03-27 1966-07-19 Ibm Method of tailoring thin film impedance devices
US3284878A (en) * 1963-12-09 1966-11-15 Corning Glass Works Method of forming thin film resistors

Also Published As

Publication number Publication date
GB1151438A (en) 1969-05-07
NL6515843A (en) 1967-06-08
ES344092A1 (en) 1968-09-16
FR1504170A (en) 1967-12-01
DE1564473A1 (en) 1970-01-22
CH462961A (en) 1968-09-30
US3456311A (en) 1969-07-22
BE690736A (en) 1967-06-05

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