US3333137A - Glow discharge tube having planar main electrodes and planar auxiliary electrodes - Google Patents

Glow discharge tube having planar main electrodes and planar auxiliary electrodes Download PDF

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Publication number
US3333137A
US3333137A US385745A US38574564A US3333137A US 3333137 A US3333137 A US 3333137A US 385745 A US385745 A US 385745A US 38574564 A US38574564 A US 38574564A US 3333137 A US3333137 A US 3333137A
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US
United States
Prior art keywords
anode
electrodes
cathode
planar
glow discharge
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Expired - Lifetime
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US385745A
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English (en)
Inventor
Frouws Simon Mari
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US Philips Corp
North American Philips Co Inc
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US Philips Corp
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Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3333137A publication Critical patent/US3333137A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens
    • H01J17/06—Cathodes
    • H01J17/066—Cold cathodes
    • 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
    • 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
    • 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
    • H01J2893/0066—Construction, material, support, protection and temperature regulation of electrodes; Electrode cups

Definitions

  • the invention relates to a glow discharge tube comprising an ignition anode and a control-electrode near the anode, while the anode and the cathode are parallel plates.
  • the tubes of the kind set forth of a construction hitherto known are practically suitable for manual mounting, so that their price is comparatively high.
  • the main electrodes are formed by round plates extending parallel to the bottom of the tube.
  • the manual mounting requires, in addition, comparatively great dimensions, since otherwise the accuracy of the electrode spaces is insuflicient.
  • the price can be most easily reduced by automated mounting.
  • a second problem of industrial use are the dimensions, particularly because the competing transistor has advantages in this respect.
  • the glow discharge tube is more advantageous with respect to thermal loadability and the insensitivity to temperature fluctuations.
  • the invention has for its object to provide a construction which is advantageous with respect to the known constructions of glow discharge tubes.
  • a glow discharge tube comprising an ignition anode and a control-electrode near the anode, in which the anode and the cathode are parallel plates
  • all electrodes are, in accordance with the invention formed by plates and are welded in line with the electrode leads in the bottom of the tube, while both the ignition anode and the control-electrode are at right angles to the plane of the main anode and the main cathode and reach into incisions of the main anode and the main cathode so that with respect to the electrode system the tube is quite symmetrical.
  • the incisions in the main anode and in the main cathode are preferably formed from the free ends of the same, while on the rear side the cathode is coated with a material of higher discharge potential in order to ensure the start of the auxiliary discharge on the front side.
  • the construction according to the invention is particularly suitable for carrying out a method in which the electrodes with the supply Wires welded thereto are held in a jig, after which a bottom of powder glass with openings for accommodating the electrode through-connections is slipped onto said through-connections and fused thereto simultaneously with the fusion of the bulb to the bottom of powdery glass.
  • FIG. 1 designates a bottom of powdery glass and 2 the glass bulb, which tapers upwardly in a sealed point 3.
  • the cathode 4 is butt-welded to the end of the current supply wire 5 and the anode 6 to the end of the current supply Wire 7.
  • the ignition anode 8 is welded to the end of the current supply wire 9 and the control-electrode 10 is welded to the end of the current supply wire 11.
  • the ignition anode 8 reaches in the incision 12 of the cathode without projecting in the anode-cathode space.
  • the primer-electrode 10 reaches in the incision 13 of the anode, also without projecting in the space between the anode and the cathode.
  • the cathode 4 is coated on the rear side with a nickel layer 14.
  • the anode 6 is coated on the rear side with a nickel layer 15.
  • the electrodes are made of molybdenum sheet.
  • the distance between the main anode and the main cathode is 1.5 mms. and the tube is filled with argon of mms. Hg.
  • the tube contains, in addition, lac. of tritium in order to avoid an excessively long delay in the ignition of the controldischarge.
  • the tube When the tube is assembled, the electrods are first arranged in a jig and the bottom 1 is fused to the current supply wires simultaneously with the bulb 2 to the bottom 1.
  • the bulb 1 is a straight length of tube of a diameter of 6 mms., which serves, in addition, as an exhaust tube. After the pumping operation, the surfaces of the electrodes are cleaned by discharges by volatilization so that a dark deposit is produced on the wall of the bulb.
  • the tube of the size indicated above has an anode-cathode break-down voltage of more than 280 v. and an auxiliaryanode discharge voltage of about v.
  • the burning voltage is 100 v.
  • the tube is suitable for an ignition frequency of nominal 25 kc./s.
  • a glow discharge tube comprising an envelope, an ionizable medium and a substantially symmetrical electrode system within said envelope, said electrode system comprising spaced, parallel plate-shaped electrodes one of which constitutes an anode and the other a cathode, each of said electrodes having an incision therein, a plateshaped ignition anode extending substantially at right angles to and into the incision in the cathode electrode without extending into the space between the cathode and anode, a plate-shaped control electrode extending substantially at right angles to and into the incision in the anode without extending into the space between the cathode and anode, and lead-in conductors for each of said electrodes extending through a base portion of said envelope and integrally connected to the respective electrodes.
  • a glow discharge tube comprising an envelope, an ionizable medium and a substantially symmetrical electrode system within said envelope, said electrode system comprising spaced, parallel plate-shaped electrodes one of which constitutes an anode and the other a cathode, each of said electrodes having an incision therein extending from an edge of said electrode, said cathode electrode being coated on the side remote from the anode with a material having a higher discharge potential than the material on the side facing the anode, a plate-shaped ignition anode extending substantially at right angles to and into the incision in the cathode electrode without extending into the space between the cathode and anode, a plate-shaped control electrode extending substantially at right angles to and into the incision in the anode without extending into the space between the cathode and anode, and lead-in conductors for each of said electrodes extending through a base portion of said envelope and integrally connected to an edge opposite the incision in each of the respective electrodes.

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US385745A 1963-08-28 1964-07-28 Glow discharge tube having planar main electrodes and planar auxiliary electrodes Expired - Lifetime US3333137A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL297242 1963-08-28

Publications (1)

Publication Number Publication Date
US3333137A true US3333137A (en) 1967-07-25

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ID=19754997

Family Applications (1)

Application Number Title Priority Date Filing Date
US385745A Expired - Lifetime US3333137A (en) 1963-08-28 1964-07-28 Glow discharge tube having planar main electrodes and planar auxiliary electrodes

Country Status (3)

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US (1) US3333137A (de)
AT (1) AT245693B (de)
CH (1) CH424000A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2032437A1 (de) * 1969-07-17 1971-01-28 Canadian General Electric Co , Ltd , Toronto, Ontario (Kanada) Synchronmotor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508954A (en) * 1943-02-03 1950-05-23 Merlin Gerin Electric discharge device with auxiliary electrode
US2564040A (en) * 1949-07-12 1951-08-14 Bell Telephone Labor Inc Glow discharge voltage control device
US2889481A (en) * 1957-11-25 1959-06-02 Bell Telephone Labor Inc Gaseous discharge devices
US3263112A (en) * 1963-07-08 1966-07-26 Alan C Kolb Magnetic blowout switch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508954A (en) * 1943-02-03 1950-05-23 Merlin Gerin Electric discharge device with auxiliary electrode
US2564040A (en) * 1949-07-12 1951-08-14 Bell Telephone Labor Inc Glow discharge voltage control device
US2889481A (en) * 1957-11-25 1959-06-02 Bell Telephone Labor Inc Gaseous discharge devices
US3263112A (en) * 1963-07-08 1966-07-26 Alan C Kolb Magnetic blowout switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2032437A1 (de) * 1969-07-17 1971-01-28 Canadian General Electric Co , Ltd , Toronto, Ontario (Kanada) Synchronmotor

Also Published As

Publication number Publication date
CH424000A (de) 1966-11-15
AT245693B (de) 1966-03-10

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