US1961719A - Gaseous electric discharge device - Google Patents

Gaseous electric discharge device Download PDF

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Publication number
US1961719A
US1961719A US695622A US69562233A US1961719A US 1961719 A US1961719 A US 1961719A US 695622 A US695622 A US 695622A US 69562233 A US69562233 A US 69562233A US 1961719 A US1961719 A US 1961719A
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US
United States
Prior art keywords
container
lamp
electric discharge
metal
gaseous
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Expired - Lifetime
Application number
US695622A
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English (en)
Inventor
Uyterhoeven Willem
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General Electric Co
Original Assignee
General Electric Co
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Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
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Publication of US1961719A publication Critical patent/US1961719A/en
Anticipated expiration legal-status Critical
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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
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers

Definitions

  • the present invention relates to gaseous electric discharge devices generally and more particularly the invention relates to such devices in which a metal vapor constitutes the gaseous atmosphere, or is a component of the gaseous atmosphere.
  • Gaseous discharge lamp devices employing the vapor of a. difficultly vaporizable metal, such as sodium, cadmium, thallium, or magnesium, as a light giving element are very efficient light sources.' Since these metals vaporize only at elevated temperatures it is desirable that the container of the gaseous electric lamp device be provided with a heat conservator to reduce to a minimum the radiation of heat from the walls of the container in order that the container walls may be at the required elevated temperature during the operation of the device. Two types of heat conservators are useful for this purpose.
  • One type is a gas tight, sealed envelope enclosing the container of the lamp and the space between the envelope and the container is wholly or partially evacuated, or is filled with a gas at a pressure lower than atmospheric pressure when desired.
  • the other type of heat conservator is a double walled jacket separate from the lamp container and in which the container of the lamp device is mounted. The space between the walls of the jacket is wholly or partially evacuated, or is filled with a gas at a pressure lower than atmospheric pressure when desired.
  • This last mentioned type of heat conservator that is the type wherein the heat conservator is separate from the container of the gaseous electric discharge device, has various advantages over the first mentioned type among which are a lower manufacturing cost, a lower replacement cost and facility in transportation.
  • the quantity of metal used is usually greater than that required to provide a saturated vapor atmosphere in the lamp at the normal operating temperature of said lamp.
  • the excess metal which is solid at room temperature, deposits on the coolest part of the container, and that the place at which the deposit forms varies greatly in difierent lamps and in the same lamp at different times. This is probably due to the fact that the difference in'temperature of different parts of the wall of the container is small since the container is in an atmosphere the pressure of which is lower than atmospheric pressure.
  • the above is particularly true where the container is mounted in a double walled jacket since the air present between the jacket and the container tends to equalize the temperature at all parts of the container. This uncertaintyas to the place on the container where the metal will deposit is dis advantageous for the metal frequently deposits where it interferes with the emission of light by the lamp.
  • the object of the present invention is to provide a lamp unit comprising the combination of a gaseous electric discharge lamp device the gaseous atmosphere of which comprises a metal vapor and a heat conservator for said lamp device wherein the deposits of condensed metal vapor are restricted to a particular part of the container of the lamp device.
  • the object of the invention is attained by mounting the container of the lamp device eccentrically in the heat conservator.
  • the part of the wall of the container closest the wall of the heat conservator is then the coldest part of said container wall and, of course, the metal deposits are localized on the part of the container at the lowest temperature, the other parts of said container being unobscured by metal deposits.
  • Fig. 1 is a side elevational view of one type of a gaseous electric discharge lamp device and a heat conservator therefor, said conservator being 1 having a thermionic electrode 2 sealed the-rein at each end thereof.
  • Each of said thermionic electrodes 2 has two current inleads and comprises a coiled metal filament, such as a tungsten filament, and a coating of electron emitting material, such as barium oxide, on said metal filament.
  • Said container 1 has a gaseous atmosphere therein comprising a mixture of a gas, such as neon, and the vapor of a difficultly vaporizable metal which is solid at room temperature, such as sodium.
  • An envelope 3 encloses said container 1 and the inleads of said electrodes 2 are sealed into said envelope 3.
  • Said envelope 3 is evacuated to insure the thermal insulation of said container 1 from the outside atmosphere.
  • the current inleads for said electrodes 2 support said container 1 in said envelope 3 and said inleads are bent so that the longitudinal axis of said container 1 is out of the longitudinal axis of said envelope 3.
  • the bent inleads are flexible to allow for uneven expansion of container 1 and envelope 3 during the operation of the device.
  • one side 4 of said container 1 is closer to the wall of said envelope 3 than the opposite side 5 of said container 1.
  • the side 4 is at a lower temperature than the side 5 of said con tainer 1 during the operation of the lamp and any condensation of sodium vapor takes place on the side 4 of said container 1 so that the side 5 remains free from undesired deposits of condensed material and the light from the luminous positive column discharge between said electrodes 2 passes unhindered through the side 5.
  • the embodiment of the invention illustrated in Figs. 3 and 4 of the drawing comprises a gaseous electric discharge lamp device comprising a bulb shaped container 6 having sealed therein a thermionic cathode '7 and two ring shaped anodes 8 mounted on opposite sides of said cathode 7 and at equal distances from said cathode 7.
  • Said cathode 7 is similar in structure to the electrodes 2 of the lamp device illustrated in Figs. 1 and 2 of the drawing.
  • Said container 6 has a gaseous atmosphere therein similar to that in the lamp device of Figs. 1 and 2.
  • the bulb shaped lamp device in this embodiment of the invention is mounted in a double walled jacket 9.
  • the space between the walls of said jacket 9 is evacuated or filled with a gas at a pressure lower than atmospheric pressure, when desired.
  • the gaseous electric discharge lamp device is mounted eccentrically in the double walled jacket so that the side 10 of the container 6 of said lamp device is closer to the wall of said jacket 9 than the opposite side 11 thereof.
  • the side 10 is the coldest part of said container 6 during the operation of the lamp device and the condensed metallic material deposits on the side 10. The light emitted by the arc discharge can thus pass unobstructed through the side 11 of the lamp.
  • an electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere therein comprising a difiicultly vaporizable metal and a heat conservator therefor said container being mounted eccentrlcaliy in said heat conservator to localize deposits of the condensed metal in said container during the operation of said lamp.
  • an electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere therein comprising a dilficultly vaporizable metal and a heat conservator therefor said heat conservator being a. gas tight envelope enclosing said container, said container being mounted eccentrically in said heat conservator to localize deposits of the condensed metal in said container during the operation of said lamp.
  • an electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere therein comprising a diflicultly vaporizable metal and a heat conservator therefor said heat conservator being a double walled jacket, said container being mounted eccentrically in said heat conservator to localize deposits of the condensed metal in said container during the operation of said lamp.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
US695622A 1932-11-15 1933-10-28 Gaseous electric discharge device Expired - Lifetime US1961719A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE415613X 1932-11-15
DEN35074D DE611962C (de) 1932-11-15 1933-04-01 Elektrische Entladungslampe mit Dampffuellung schwer verdampfbarer Metalle

Publications (1)

Publication Number Publication Date
US1961719A true US1961719A (en) 1934-06-05

Family

ID=25910674

Family Applications (2)

Application Number Title Priority Date Filing Date
US695622A Expired - Lifetime US1961719A (en) 1932-11-15 1933-10-28 Gaseous electric discharge device
US715462A Expired - Lifetime US2103226A (en) 1932-11-15 1934-03-14 Gaseous electric discharge lamp device

Family Applications After (1)

Application Number Title Priority Date Filing Date
US715462A Expired - Lifetime US2103226A (en) 1932-11-15 1934-03-14 Gaseous electric discharge lamp device

Country Status (6)

Country Link
US (2) US1961719A (xx)
BE (1) BE399274A (xx)
DE (1) DE611962C (xx)
FR (1) FR763159A (xx)
GB (1) GB415613A (xx)
NL (1) NL38017C (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619682A (en) * 1969-04-01 1971-11-09 Sylvania Electric Prod Arc discharge lamp including means for cooling envelope surrounding an arc tube
US3662203A (en) * 1969-05-20 1972-05-09 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High pressure saturated metal vapor, preferably sodium or metal halide vapor discharge lamp
US5229681A (en) * 1989-10-10 1993-07-20 Musco Corporation Discharge lamp with offset or tilted arc tube
US5856721A (en) * 1994-09-08 1999-01-05 Gordin; Myron K. Discharge lamp with offset or tilted arc tube
US20030147240A1 (en) * 2002-02-07 2003-08-07 Gordin Myron K. High-intensity lighting fixture
WO2006126144A3 (en) * 2005-05-23 2008-06-12 Philips Intellectual Property High-intensity discharge lamp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1110754B (de) * 1958-09-05 1961-07-13 Philips Nv Aus mindestens einer rohrfoermigen Entladungslampe bestehende Lichtquelle
BE631753A (xx) * 1962-05-02

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619682A (en) * 1969-04-01 1971-11-09 Sylvania Electric Prod Arc discharge lamp including means for cooling envelope surrounding an arc tube
US3662203A (en) * 1969-05-20 1972-05-09 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High pressure saturated metal vapor, preferably sodium or metal halide vapor discharge lamp
US5229681A (en) * 1989-10-10 1993-07-20 Musco Corporation Discharge lamp with offset or tilted arc tube
US5856721A (en) * 1994-09-08 1999-01-05 Gordin; Myron K. Discharge lamp with offset or tilted arc tube
US20050231955A1 (en) * 2001-02-07 2005-10-20 Musco Corporation High intensity lighting fixture
US7284879B2 (en) 2001-02-07 2007-10-23 Musco Corporation HID lighting fixture with quick-disconnect light source mount
US20030147240A1 (en) * 2002-02-07 2003-08-07 Gordin Myron K. High-intensity lighting fixture
US7059745B2 (en) 2002-02-07 2006-06-13 Musco Corporation Lighting fixture with quick-disconnect light source mount
WO2006126144A3 (en) * 2005-05-23 2008-06-12 Philips Intellectual Property High-intensity discharge lamp

Also Published As

Publication number Publication date
BE399274A (xx)
US2103226A (en) 1937-12-21
NL38017C (xx)
GB415613A (en) 1934-08-30
FR763159A (fr) 1934-04-25
DE611962C (de) 1935-04-11

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