US2757307A - Multi-glow switch tube - Google Patents

Multi-glow switch tube Download PDF

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Publication number
US2757307A
US2757307A US364720A US36472053A US2757307A US 2757307 A US2757307 A US 2757307A US 364720 A US364720 A US 364720A US 36472053 A US36472053 A US 36472053A US 2757307 A US2757307 A US 2757307A
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US
United States
Prior art keywords
auxiliary
discharge
switch tube
electrode
electrodes
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
US364720A
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English (en)
Inventor
Six Willem
Domburg Jacobus
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.)
Hartford National Bank and Trust Co
Original Assignee
Hartford National Bank and Trust Co
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 Hartford National Bank and Trust Co filed Critical Hartford National Bank and Trust Co
Application granted granted Critical
Publication of US2757307A publication Critical patent/US2757307A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/30—Igniting arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • 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)

Definitions

  • This invention relates to multi-glow switch tubes, that is to say discharge tubes comprising a rare-gas filling and electrodes consisting of crossed wires or rods, a number of glow discharge paths being formed at the crossings.
  • discharge tubes comprising a rare-gas filling and electrodes consisting of crossed wires or rods, a number of glow discharge paths being formed at the crossings.
  • Ten anode rods and ten cathode rods permit of obtaining a hundred discharge paths.
  • the number of main electrodes is low relatively to the number of discharge paths.
  • the aforesaid tubes are inter alia employed in circuitarrangements for automatic telephone systems.
  • the auxiliary electrodes for a number of discharge paths are combined to form a wire or rod extending substantially parallel with the associated main electrode.
  • the last-mentioned arrangement has a limitation in that, after striking one discharge path, the auxiliary electrode concerned assumes the potential of the discharge, so that in accordance with the distribution of the impedances over the anode circuit and the cathode circuit either the voltage of the auxiliary anode for the remaining discharge paths, of which it forms part, becomes so high or that of the auxiliary cathode becomes so low as to provoke spontaneous ignition, or the auxiliary electrode voltage has such a value as to bring about the discharge upon animpulse on a principal electrode, so that a main electrode was simultaneously connected to two circuits, which is undesirable.
  • the present invention has for its object to mitigate this limitation.
  • the auxiliary electrodes are provided with a resistance layer by which. the auxiliary current is limited to the desired value.
  • Said resistance layer assumes the potential of the discharge only where it is struck, whereas the remaining parts of the resistance layer retain substantially the same voltage as the source of voltage to which they are connected. In this manner a discharge is prevented from being struck in the discharge path not to be used.
  • Fig. 1 represents a section at right angles to the axis through a discharge tube according to the invention
  • Fig. 2 is a vertical sectional view of such a tube.
  • the reference numeral 1 denotes a cylindrical glass wall of the tube, 2 denoting ice fiat mica discs provided with a big central hole. Between every two mica discs are provided narrow nickel rings 3 constituting the cathodes of the tube and obtained by curving plane rods in the form of a circle.
  • the tube comprises ten cathodes.
  • Ten elongated mica strips 4 enter by means of incisions into the mica discs 2.
  • the elongated rods 5 constitute the anodes, the thinner rods 6 constituting the auxiliary anodes.
  • the latter consists of an aluminium or zirconium wire which is oxidised at its surface.
  • the parallel resistance of the total layer of an auxiliary anode is 0.025 to 0.05 megohm, hence the resistance in a discharge path is 0.25 to 0.5 megohm. Oxidation may be replaced by coating with a semi-conductor.
  • a multi-glow switch tube comprising an envelope, a rare-gas filling in said envelope, and an electrode system in said envelope; said system comprising a plurality of elongated cathode electrodes, a plurality of elongated main anode electrodes extending transverse to said cathode electrodes and defining therewith a plurality of main discharge paths, and an elongated auxiliary anode electrode extending substantially parallel to a main anode electrode and electrically associated with a plurality of said discharge paths, said auxiliary anode electrode controlling each of the discharge paths with which it is associated and drawing current in the process, said auxiliary electrode having a resistance surface layer throughout its length suflicient to limit the auxiliary current to a predetermined value, whereby the entire auxiliary electrode is prevented from assuming the potential of a particular discharge at a portion thereof.
  • a multi-glow switch tube comprising an envelope, a rare-gas filling in said envelope, and an electrode system in said envelope; said system comprising a plurality of ring-like cathode electrodes, a plurality of rod-like main anode electrodes extending transverse to said cathode electrodes and defining therewith a plurality of main discharge paths, and a rod-like auxiliary anode electrode extending substantially parallel to a main anode electrode and electrically associated with a plurality of said discharge paths, said auxiliary anode electrode consisting of a metal selected from the group consisting of aluminum and zirconium and controlling each of the discharge paths with which it is associated and drawing current in the process, said auxiliary electrode having an oxidized surface layer throughout its length exhibiting a resistance of between about 0.025 and 0.05 megohm, whereby the entire auxiliary electrode is prevented from assuming the potential of a particular discharge at a portion thereof.

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  • Lasers (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US364720A 1952-07-04 1953-06-29 Multi-glow switch tube Expired - Lifetime US2757307A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL316271X 1952-07-04

Publications (1)

Publication Number Publication Date
US2757307A true US2757307A (en) 1956-07-31

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ID=19783813

Family Applications (1)

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US364720A Expired - Lifetime US2757307A (en) 1952-07-04 1953-06-29 Multi-glow switch tube

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US (1) US2757307A (enrdf_load_html_response)
BE (1) BE521158A (enrdf_load_html_response)
CH (1) CH316271A (enrdf_load_html_response)
DE (1) DE948276C (enrdf_load_html_response)
FR (1) FR1080315A (enrdf_load_html_response)
GB (1) GB728194A (enrdf_load_html_response)
NL (1) NL170851C (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3684910A (en) * 1970-05-18 1972-08-15 Itt Electron multiplier having dynode modules

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1722121A (en) * 1925-06-25 1929-07-23 Western Electric Co Electron-discharge device
US2092804A (en) * 1935-11-07 1937-09-14 Telefunken Gmbh Screen grid electron discharge tube
US2404920A (en) * 1940-09-27 1946-07-30 Research Corp Electronic discharge apparatus
US2417730A (en) * 1942-11-30 1947-03-18 Eitel Mccullough Inc Electron tube and method of making same
US2419485A (en) * 1943-06-03 1947-04-22 Ncr Co Electronic device
CA466334A (en) * 1950-07-04 W. Eitel William Electron tube and method of making the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT128214B (de) * 1929-12-21 1932-05-10 Telefunken Gmbh Gasgefüllte Entladungsröhre.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA466334A (en) * 1950-07-04 W. Eitel William Electron tube and method of making the same
US1722121A (en) * 1925-06-25 1929-07-23 Western Electric Co Electron-discharge device
US2092804A (en) * 1935-11-07 1937-09-14 Telefunken Gmbh Screen grid electron discharge tube
US2404920A (en) * 1940-09-27 1946-07-30 Research Corp Electronic discharge apparatus
US2417730A (en) * 1942-11-30 1947-03-18 Eitel Mccullough Inc Electron tube and method of making same
US2419485A (en) * 1943-06-03 1947-04-22 Ncr Co Electronic device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3684910A (en) * 1970-05-18 1972-08-15 Itt Electron multiplier having dynode modules

Also Published As

Publication number Publication date
GB728194A (en) 1955-04-13
FR1080315A (fr) 1954-12-08
DE948276C (de) 1956-08-30
NL170851C (nl)
CH316271A (de) 1956-09-30
BE521158A (enrdf_load_html_response)

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