GB525418A - Improvements in or relating to electric discharge tubes - Google Patents

Improvements in or relating to electric discharge tubes

Info

Publication number
GB525418A
GB525418A GB5638/39A GB563839A GB525418A GB 525418 A GB525418 A GB 525418A GB 5638/39 A GB5638/39 A GB 5638/39A GB 563839 A GB563839 A GB 563839A GB 525418 A GB525418 A GB 525418A
Authority
GB
United Kingdom
Prior art keywords
tubes
tungsten
molybdenum
feb
evaporated
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
GB5638/39A
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 GB525418A publication Critical patent/GB525418A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • H01J5/06—Vessels or containers specially adapted for operation at high tension, e.g. by improved potential distribution over surface of vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/42—Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/42—Mounting, supporting, spacing, or insulating of electrodes or of electrode assemblies
    • H01J19/44—Insulation between electrodes or supports within the vacuum space
    • 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
    • H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/14—Magic-eye or analogous tuning indicators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • H01J5/08—Vessels; Containers; Shields associated therewith; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0002—Construction arrangements of electrode systems

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Gas-Filled Discharge Tubes (AREA)

Abstract

525,418. Discharge apparatus. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Feb. 20, 1939, No. 5638. Convention date, Feb. 22, 1938. Drawings to Specification. [Class 39 (i)] To suppress secondary electron emission from and consequent charging of, the walls or other insulating members of discharge tubes, they are coated with one or more of the oxides or sulphides of tungsten, molybdenum, copper or silver having a secondary emission ratio less than unity at least up to 300-350 volts. The coatings are so thin that the walls carrying them are transparent to light and that insulators carrying them are transparent to heat radiation. To form a tungsten oxide layer, tungsten may be evaporated at 2300‹C, in air at 2 min. pressure. A molybdenum oxide layer is similarly formed by evaporating molybdenum. Alternatively, the coating compounds may be evaporated in vacuo or inert gas or sprayed on. The application to the wall of a fluorescent anode tuning indicator combined with a triode is described and application to tubes with fluorescent screens, photoelectric cells, luminous tubes, ultra-violet radiators and amplifier tubes are referred to.
GB5638/39A 1938-02-22 1939-02-20 Improvements in or relating to electric discharge tubes Expired GB525418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL86569A NL50589C (en) 1938-02-22 1938-02-22

Publications (1)

Publication Number Publication Date
GB525418A true GB525418A (en) 1940-08-28

Family

ID=43797554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5638/39A Expired GB525418A (en) 1938-02-22 1939-02-20 Improvements in or relating to electric discharge tubes

Country Status (5)

Country Link
BE (1) BE432880A (en)
DE (1) DE757282C (en)
FR (1) FR850656A (en)
GB (1) GB525418A (en)
NL (1) NL50589C (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1929661A (en) * 1928-08-31 1933-10-10 Electrons Inc Electron tube
AT148610B (en) * 1933-08-31 1937-02-10 Rca Corp Electric discharge tube.

Also Published As

Publication number Publication date
NL50589C (en) 1941-05-27
FR850656A (en) 1939-12-22
DE757282C (en) 1944-10-19
BE432880A (en) 1939-03-31

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