US2176134A - Electric gaseous discharge device - Google Patents

Electric gaseous discharge device Download PDF

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Publication number
US2176134A
US2176134A US131489A US13148937A US2176134A US 2176134 A US2176134 A US 2176134A US 131489 A US131489 A US 131489A US 13148937 A US13148937 A US 13148937A US 2176134 A US2176134 A US 2176134A
Authority
US
United States
Prior art keywords
neon
envelope
jacket
gaseous discharge
discharge device
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
US131489A
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English (en)
Inventor
Holst Gilles
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US2176134A publication Critical patent/US2176134A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/822—High-pressure mercury lamps

Definitions

  • the present invention relates to electric gaseous discharge devices, and particularly to devices of this. type which operate at relatively high temperatures.
  • Another object of the invention is to provide a light source of high efliciency.
  • a further objectof the invention is to provide a gaseous discharge device having a long useful life. Still other objects and advantages of the invention will appear from the following detailed specification or from an inspection of the accompanying drawing.
  • a further object of the inventhrough the wall of the envelope with the result that it becomes increasingly diflicult to initiate a discharge therein, more and more potential being required for this purpose until eventually the device will not start at all on the available potential. As a result the useful life of these devices has been materially shortened.
  • the neon in this jacket increases the heat transfer from the lamp envelope to the jacket and thus aids in dissipating heat from the lamp. In many cases this is desirable, since, as compared to an evacuated jacket, it permits more energy to be impressed on the lamp, with a consequent increase in luminous efliciency. This heat transfer is further increased, where desired, by the addition of another gas, such as nitrogen, which will not diffuse through the lamp envelope when hot to the neon within the jacket.
  • another gas such as nitrogen
  • the discharge tube I is of the capillary type which is now on the market for the emission of visible light or ultraviolet rays.
  • This tube which is of fused silica, has an inside diameter of 4 mm., andan outside diameter of 7.5 mm.
  • This tube is provided at the ends with the electrode chambers 2, in which I are sealed the thermionic cathodes 3, which preferably consist of tungsten coated with barium oxide.
  • These electrodes which are of the type which are heated to electron emission by the discharge, are separated by 18 mm.
  • said discharge tube 5 there is a small amount of mercury and a rare gas filling which consists of neon with a sufilcient addition of argon to reduce the breakdown potential between the electrons 3 to a value less than that with pure neon.
  • argon ordinarily is of the order of .2% of the neon.
  • the discharge tube l is suspended from the stem 6 of the glass envelope 1 by means of the current inlead wires 4 and 5.
  • This envelope or jacket I is filled with a mixture of neon and nipressure of neon within the jacket 1.
  • the gas within the jacket 1 produces an increased heat transfer, due largely to increased convection currents, from the tube l toward this jacket so that the energy impressed upon the tube l for a given heating thereof is greater than would be the case if there were a vacuum within this jacket.
  • This increase in energy consumption results not only in a greater light output, but also in a higher luminous eificiency.
  • the nitrogen which is added to the neon in this jacket aids in this heat transfer without creating any problem of difiusion into the tube l, due to the fact that the nitrogen will not diffuse through the fused silica. Any other suitable gas which would not diffuse through the fused silica might be used in a similar manner.
  • An electric gaseous discharge device comprising a sealed envelope, electrodes therein, a gaseous atmosphere within said envelope consisting of neon with a small percentage of argon intermixed therewith, and a sealed jacket about said envelope containing nitrogen intermixed with a small quantity of neon, whereby the neon concentration within said sealed envelope is maintained substantially constant despite long continued maintenance of said envelope at a temperature above that at which neon will diffuse therethrough.

Landscapes

  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US131489A 1936-03-27 1937-03-17 Electric gaseous discharge device Expired - Lifetime US2176134A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE467078X 1936-03-27

Publications (1)

Publication Number Publication Date
US2176134A true US2176134A (en) 1939-10-17

Family

ID=6540647

Family Applications (1)

Application Number Title Priority Date Filing Date
US131489A Expired - Lifetime US2176134A (en) 1936-03-27 1937-03-17 Electric gaseous discharge device

Country Status (4)

Country Link
US (1) US2176134A (en(2012))
BE (1) BE420764A (en(2012))
FR (1) FR819753A (en(2012))
GB (1) GB467078A (en(2012))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687486A (en) * 1952-01-24 1954-08-24 Westinghouse Electric Corp Gaseous discharge lamp
US2774013A (en) * 1949-04-07 1956-12-11 Gen Electric Electric discharge lamp
US3753018A (en) * 1970-07-31 1973-08-14 Philips Corp Wall-stabilized high-pressure mercury and metal iodide vapour discharge lamp with outer envelope
US3883766A (en) * 1973-07-19 1975-05-13 Gte Sylvania Inc Method of operating high-intensity arc discharge lamp
US4622485A (en) * 1984-02-14 1986-11-11 Hitachi, Ltd. Discharge lamp with neon gas in outer tube

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4199701A (en) * 1978-08-10 1980-04-22 General Electric Company Fill gas for miniature high pressure metal vapor arc lamp

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774013A (en) * 1949-04-07 1956-12-11 Gen Electric Electric discharge lamp
US2687486A (en) * 1952-01-24 1954-08-24 Westinghouse Electric Corp Gaseous discharge lamp
US3753018A (en) * 1970-07-31 1973-08-14 Philips Corp Wall-stabilized high-pressure mercury and metal iodide vapour discharge lamp with outer envelope
US3883766A (en) * 1973-07-19 1975-05-13 Gte Sylvania Inc Method of operating high-intensity arc discharge lamp
US4622485A (en) * 1984-02-14 1986-11-11 Hitachi, Ltd. Discharge lamp with neon gas in outer tube

Also Published As

Publication number Publication date
BE420764A (en(2012))
GB467078A (en) 1937-06-10
FR819753A (fr) 1937-10-26

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