US2048887A - Discharge tube - Google Patents

Discharge tube Download PDF

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Publication number
US2048887A
US2048887A US310644A US31064428A US2048887A US 2048887 A US2048887 A US 2048887A US 310644 A US310644 A US 310644A US 31064428 A US31064428 A US 31064428A US 2048887 A US2048887 A US 2048887A
Authority
US
United States
Prior art keywords
tube
discharge
cathode
discharge tube
tubes
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 - Lifetime
Application number
US310644A
Other languages
English (en)
Inventor
Oosterhuis Ekko
Mulder Johannes Gijsbe Wilhelm
Duinker Daniel Marie
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
Priority claimed from GB3418227A external-priority patent/GB308288A/en
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of US2048887A publication Critical patent/US2048887A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/92—Lamps with more than one main discharge path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/35—Vessels; Containers 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
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/56—One or more circuit elements structurally associated with the lamp

Definitions

  • incandescible cathode This invention has reference to an electric discharge device, more particularly of the incandescible cathode type.
  • incandescent cathode will hereinafter be understood to mean 5 not only a cathode heated by a galvanic current but also heated in some other manner, for example by the discharge, if the temperature to which the cathode is heated is so high that the discharge has the character of an arc discharge.
  • Such arc discharge can only occur in discharge tubes of the type containing a gasfilling.
  • the shielding in a radio tube is to prevent electrostatic influences, which may cause noises and 5 therefore mar the reception.
  • the phenomenon may occur that the discharge between the incandescent cathode and an anode of the discharge tube is interrupted under cer- 40 tain conditions, for example, on the device being approached.
  • An object of our invention is to improve the reliability of such devices.
  • Another object is to apply conducting envelopes to gasfilled discharge tubes.
  • a further object is to improve the ignition of 50 incandescent cathode tubes having a gasfilling
  • an electric device comprising an incandescent cathode, gasfilled discharge tube, a conducting envelope is arranged in the vicinity of said discharge tube and a connection is made between said conducting member and 5 a direct current circuit for said tube.
  • a point of the direct current circuit is connected by a resistance or capacity to a metal housing, that constitutes the wall of the electric device.
  • a point of the direct current circuit may be connected to a conducting coating of the wall of a discharge tube.
  • connection may be satisfactorily formed by a stroke of lead pencil.
  • the wall of the discharge tube shown in the drawing is designated by IS, the incandescent cathode by I! and the anodes by 18 and 19.
  • the poles of the electrodes are taken out of the tube through the press 20 and connected to the lead wires 2
  • the wall of the tube is coated with a conducting layer 25, for example of tin-foil, which is connected to the lead wire 22 of the cathode by a resistance 26 that may consist of a stroke of lead pencil.
  • An electric discharge tube comprising a vitreous 40 envelope, an anode and a cathode, leads for the anode and cathode, a conductive coating intimately adhering to the outer surface of the envelope and having a portion extending substantially to the bottom thereof, and a lead pencil line at the bottom of said envelope, said line conductively interconnecting one of the cathode leads and the extending portion of said coating.

Landscapes

  • Elimination Of Static Electricity (AREA)
  • Gas-Filled Discharge Tubes (AREA)
US310644A 1927-11-26 1928-10-05 Discharge tube Expired - Lifetime US2048887A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2048887X 1927-11-26
GB3418227A GB308288A (en) 1927-12-16 1927-12-16 Improvements in or relating to circuit arrangements embodying discharge tubes

Publications (1)

Publication Number Publication Date
US2048887A true US2048887A (en) 1936-07-28

Family

ID=32510444

Family Applications (1)

Application Number Title Priority Date Filing Date
US310644A Expired - Lifetime US2048887A (en) 1927-11-26 1928-10-05 Discharge tube

Country Status (2)

Country Link
US (1) US2048887A (en)van)
BE (1) BE355096A (en)van)

Also Published As

Publication number Publication date
BE355096A (en)van)

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