GB793705A - Improvements in or relating to glow discharge tubes - Google Patents

Improvements in or relating to glow discharge tubes

Info

Publication number
GB793705A
GB793705A GB9850/55A GB985055A GB793705A GB 793705 A GB793705 A GB 793705A GB 9850/55 A GB9850/55 A GB 9850/55A GB 985055 A GB985055 A GB 985055A GB 793705 A GB793705 A GB 793705A
Authority
GB
United Kingdom
Prior art keywords
cathode
ignition
screen
anode
ignition electrode
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
GB9850/55A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB793705A publication Critical patent/GB793705A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/40—Cold-cathode tubes with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes, voltage-indicator tubes
    • H01J17/44—Cold-cathode tubes with one cathode and one anode, e.g. glow tubes, tuning-indicator glow tubes, voltage-stabiliser tubes, voltage-indicator tubes having one or more control electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0064—Tubes with cold main electrodes (including cold cathodes)
    • H01J2893/0065—Electrode systems
    • H01J2893/0068—Electrode systems electrode assembly with control electrodes, e.g. including a screen

Landscapes

  • Spark Plugs (AREA)

Abstract

793,705. Cold-cathode tubes. TELEFONAKTIEBOLAGET L. M. ERICSSON. April 4, 1955 [April 2, 1954], No. 9850/55. Class 39(1). In a gear discharge trigger having a screen 4 with an opening 5 arranged between the cathode 1 and anode 3 near the anode to raise the ignition voltage, the ignition sensitivity is increased by positioning the ignition electrode 2 so that its discharge surface is located near a point on the cathode 1, which point lies nearer said opening 5 than any adjacent points on the cathode. The arrangement provides an unobstructed path between the ignition gap and the anode. The screen 4 may have no external connection and may be made of insulating material. The ignition electrode may be a metal strip arranged near the lower edge of the cathode or may be a rod projecting through a hole in the cathode. In an alternative arrangement the ignition electrode is a rod which is arranged parallel to a side edge of the cathode opposite a slot in the screen. In the arrangement shown in Fig. 5 the ignition electrode 2 is located at the lower edge of the cathode 1 and the screen 4 is formed of ceramic material and has a tubular portion enclosing the main anode 3. The tube is filled with a " Penning-gas," i.e. a mixture of two rare gases, one of which has a metastable energy level higher than the lowest ionization potential of the other, e.g. 99 per cent. neon and 1 per cent. argon.
GB9850/55A 1954-04-02 1955-04-04 Improvements in or relating to glow discharge tubes Expired GB793705A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE793705X 1954-04-02

Publications (1)

Publication Number Publication Date
GB793705A true GB793705A (en) 1958-04-23

Family

ID=20339726

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9850/55A Expired GB793705A (en) 1954-04-02 1955-04-04 Improvements in or relating to glow discharge tubes

Country Status (1)

Country Link
GB (1) GB793705A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675069A (en) * 1971-01-06 1972-07-04 Eg & G Inc Point light source

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675069A (en) * 1971-01-06 1972-07-04 Eg & G Inc Point light source

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