GB1012229A - Cold-cathode glow-discharge current-indicator tube - Google Patents

Cold-cathode glow-discharge current-indicator tube

Info

Publication number
GB1012229A
GB1012229A GB3780262A GB3780262A GB1012229A GB 1012229 A GB1012229 A GB 1012229A GB 3780262 A GB3780262 A GB 3780262A GB 3780262 A GB3780262 A GB 3780262A GB 1012229 A GB1012229 A GB 1012229A
Authority
GB
United Kingdom
Prior art keywords
cathode
anode
discharge
priming
cold
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
GB3780262A
Inventor
George Frederick Weston
Pieter Schagen
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.)
Philips Components Ltd
Original Assignee
Mullard Ltd
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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB3780262A priority Critical patent/GB1012229A/en
Publication of GB1012229A publication Critical patent/GB1012229A/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
    • 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
    • H01J2893/0067—Electrode assembly without control electrodes, e.g. including a screen

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

1,012,229. Glow-discharge lamps. MULLARD Ltd. June 27, 1963 [Oct. 5, 1962], No. 37802/62. Heading H1D. A cold-cathode glow-discharge current-indicator tube has longitudinally extending parallel anode A and cathode K electrodes, wherein at one end of the electrode assembly the cathode has a priming portion J forming a priming discharge gap at which in operation one end of the discharge rests. The priming portion may be a loop in the cathode wire as shown, or, alternatively, the priming portion may consist of a piece of material of lower work function, e.g. zirconium, secured to the cathode, e.g. of molybdenum. The tube is filled with neon or neon/argon mixture at a pressure of 20-30 mms. of mercury. The inner surface of the envelope has a sputtered metal layer of cathode material, a portion of which, when viewed from the cathode is in the shadow of the anode and so forms a window in the layer. The free end of the cathode is supported relative to the anode, Fig. 5 (not shown), by securing a glass bead to the free end of the anode, the end of the cathode being held in a ceramic tube embedded in the bead.
GB3780262A 1962-10-05 1962-10-05 Cold-cathode glow-discharge current-indicator tube Expired GB1012229A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3780262A GB1012229A (en) 1962-10-05 1962-10-05 Cold-cathode glow-discharge current-indicator tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3780262A GB1012229A (en) 1962-10-05 1962-10-05 Cold-cathode glow-discharge current-indicator tube

Publications (1)

Publication Number Publication Date
GB1012229A true GB1012229A (en) 1965-12-08

Family

ID=10399103

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3780262A Expired GB1012229A (en) 1962-10-05 1962-10-05 Cold-cathode glow-discharge current-indicator tube

Country Status (1)

Country Link
GB (1) GB1012229A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3237849A1 (en) * 1982-10-13 1984-04-19 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Arrangement for indicating the operating mode of an electrical apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3237849A1 (en) * 1982-10-13 1984-04-19 E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen Arrangement for indicating the operating mode of an electrical apparatus

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