GB993969A - Improvements in electrical discharge tubes - Google Patents

Improvements in electrical discharge tubes

Info

Publication number
GB993969A
GB993969A GB2006861A GB2006861A GB993969A GB 993969 A GB993969 A GB 993969A GB 2006861 A GB2006861 A GB 2006861A GB 2006861 A GB2006861 A GB 2006861A GB 993969 A GB993969 A GB 993969A
Authority
GB
United Kingdom
Prior art keywords
grids
tube
discharge tube
june
anode
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
GB2006861A
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Publication of GB993969A publication Critical patent/GB993969A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B29/00—Generation of noise currents and voltages
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/50—Thermionic-cathode tubes
    • H01J17/52—Thermionic-cathode tubes with one cathode and one anode
    • H01J17/54—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/50—Thermionic-cathode tubes
    • H01J17/52—Thermionic-cathode tubes with one cathode and one anode
    • H01J17/54—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes
    • H01J17/56—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes for preventing and then permitting ignition, but thereafter having no control

Landscapes

  • Discharge Lamp (AREA)

Abstract

993,969. Fluorescent discharge lamps; thermionic cathode tubes. NIPPON TELEGRAPH & TELEPHONE PUBLIC CORPORATION. June 2, 1961 [June 15, 1960], No. 20068/61. Heading H1D. An electrical discharge tube, e.g. a fluorescent discharge lamp or a discharge tube used in telephone circuits, is provided with a mesh grid at a floating potential and movable to be located in the vicinity of the boundary between the space charge region and the plasma region formed when there is a potential difference across the tube, in order to reduce flickers and noises. In the construction shown in Figs. 1 and 2, the discharge tube 6 includes a cathode 7, anode 8, and mesh grids 9 fitted with nickel sliding tubes 10 movable by a magnet. The curvatures of the anode 8 and grids 9 are made to conform to the potential distribution at their locations within the tube which can be calculated or found by experiment. The grids can be of metal or an insulator and can be of different pitch and size. The grids may totally or partially enclose the electrodes. The discharge tube can contain helium at up to 4 mms. pressure.
GB2006861A 1960-06-15 1961-06-02 Improvements in electrical discharge tubes Expired GB993969A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2772660 1960-06-15

Publications (1)

Publication Number Publication Date
GB993969A true GB993969A (en) 1965-06-02

Family

ID=12229007

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2006861A Expired GB993969A (en) 1960-06-15 1961-06-02 Improvements in electrical discharge tubes

Country Status (2)

Country Link
CH (1) CH386570A (en)
GB (1) GB993969A (en)

Also Published As

Publication number Publication date
CH386570A (en) 1965-01-15

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