US2004578A - Gaseous electric discharge device - Google Patents

Gaseous electric discharge device Download PDF

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Publication number
US2004578A
US2004578A US628578A US62857832A US2004578A US 2004578 A US2004578 A US 2004578A US 628578 A US628578 A US 628578A US 62857832 A US62857832 A US 62857832A US 2004578 A US2004578 A US 2004578A
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United States
Prior art keywords
electrodes
electric discharge
electrode
discharge device
gaseous
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Expired - Lifetime
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US628578A
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English (en)
Inventor
Lems Hendrik
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General Electric Co
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General Electric Co
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Publication date
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/545—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode inside the vessel

Definitions

  • the present invention relates to gaseous electric'dischars devices generally and more particularly the invention relates to such devices having auxiliary electrodes to facilitate the start-' ding thereof.
  • a common defect in this type of electric dis-- charge device is that the material of the auxiliary electrodes sputters off during the operation of the device. This sputtered material deposits on the wall of the container to form an opaque coating thereon which reduces the efliciency and the useful operating life of the device.
  • the invention attains its objects by a coating of oxide material on the auxiliary electrodes which prevents the sputtering of material from said auxiliary electrodes to increase the efliciency and the useful operating life of the electric. discharge device.
  • FIG. 1 is a schematic view of one embodiment of the invention and I Fig. 2 is a similar view of another embodiment of the invention.
  • the gaseous electric discharge device comprises acontainer I having electrode chambers 2 and electrodes 3 sealed into stems 6 at each end thereof.
  • Said electrodes 3 consist of a coiled metal wire, such as tungsten, coated with an electron emitting material, such as barium oxide, and are adapted to emit electrons when heated. Any other suitable type of thermionic electrode, such as a Pirani electrode, or a Hull electrode, well known in the art,'is used when desired.
  • An auxiliary electrode 4 is sealed into each of said stems 6 and extends toward the center of said'container ,i.
  • Said electrodes 4 are located in the longi- "tudinal axis of said container l and are physically connected to each other in the center of said container l by a body 5 of insulation material, such as porcelain. Said electrodes 5 con- 55 sist of zirconium or aluminum wire and the surface thereof is oxidized. . Where desired electrolytic means are used to oxidize the surface of said auxiliary electrodes 4. g I
  • Said'container I is filled with a gaseous atmosphere, such as rare gas, common gas, metal va-. por, or a mixture'of these and is, for example, a mixture of argon and mercury at a pressure of approximately 6 to- 8 mm.
  • a gaseous atmosphere such as rare gas, common gas, metal va-. por, or a mixture'of these and is, for example, a mixture of argon and mercury at a pressure of approximately 6 to- 8 mm.
  • each of said electrodes 4 is connected through an impedance to one of said thermionic electrodes 3, or each of. said electrodes 6 is connected to a sep-- arate current source.
  • the embodiment of the invention shown in Fig. 2 is similar to that shown in Fig. 1 except except that cold, cylindrical electrodes 8 and 9 are sealed therein, one at each end-of the container I.
  • a thin metal rod Ill is attached to said electrode 8 and extends along the discharge path between said electrodes 8 and 9 up into the region of thesaid electrode 9.
  • the surface of said rod III is oxidized as disclosed in connection with Fig. -1.
  • current of 110 or 220 volts is applied to the terminals of the device a discharge takes place between said electrode 9 and the and parts of said auxiliary electrode Ill adjacent thereto which ionizes the gaseous filling to facilitate the starting of the positive column discharge in said device. Due to the coating of oxide material on said electrode It the sputtering of material from said electrode W is entirely prevented.
  • An electric discharge device comprising a container, electrodes sealed therein, a gaseous atmosphere therein, at least two of said electrodes being main discharge supporting electrodes, an auxiliary electrode extending from one of said said main electrodes, said auxiliary electrode being a zirconium wire coated with zirconium oxide.
  • An electric discharge device comprising a container, electrodes sealed therein, a'gaseous atmosphere therein, at least two of said electrodes being main discharge supporting electrodes, an
  • auxiliary electrode extending from one ot "said main electrodes to a point adjacent the other of said main electrodes, said auxiliary electrode being an aluminum wire coated with aluminum oxide.
  • An-electric discharge device comprising a container, a gaseous atmosphere therein, electrodes sealed therein, at least two of said electrodes being main discharge supporting electrodes, two other electrodes being elongated 10 electrodes extending from opposite ends of said container toward the center thereof, the adjacent ends of said elongated electrodes being physically joined by a body of insulationmaterial, each of said elongated electrodes being 15 coated with the oxide of the material constituting said elongated electrode and which is non-sputtering during the operation of the device.

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  • Physical Vapour Deposition (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US628578A 1931-08-20 1932-08-12 Gaseous electric discharge device Expired - Lifetime US2004578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE388302X 1931-08-20

Publications (1)

Publication Number Publication Date
US2004578A true US2004578A (en) 1935-06-11

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ID=6371254

Family Applications (1)

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US628578A Expired - Lifetime US2004578A (en) 1931-08-20 1932-08-12 Gaseous electric discharge device

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US (1) US2004578A (enrdf_load_stackoverflow)
BE (1) BE390209A (enrdf_load_stackoverflow)
FR (1) FR740954A (enrdf_load_stackoverflow)
GB (1) GB388302A (enrdf_load_stackoverflow)

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Publication number Publication date
GB388302A (en) 1933-02-23
FR740954A (enrdf_load_stackoverflow) 1933-02-03
BE390209A (enrdf_load_stackoverflow)

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