US1951124A - Gaseous electric discharge lamp device - Google Patents

Gaseous electric discharge lamp device Download PDF

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Publication number
US1951124A
US1951124A US687230A US68723033A US1951124A US 1951124 A US1951124 A US 1951124A US 687230 A US687230 A US 687230A US 68723033 A US68723033 A US 68723033A US 1951124 A US1951124 A US 1951124A
Authority
US
United States
Prior art keywords
container
stem
electric discharge
lamp
heat
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
US687230A
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English (en)
Inventor
Bol Cornelis
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 US1951124A publication Critical patent/US1951124A/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
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor

Definitions

  • the present invention relates to gaseous electric discharge lamp devices generally and more particularly the invention relates to such devices in which a metal vapor is used as the gase- 5 ous filling or as a component of the gaseous fill-
  • the pressure of the metal vapor in the lamp corresponds to the temperature of the container of the lamp.
  • One method of controlling the temperature of the lamp container and therewith the metal vapor pressure therein is by regulating the radiation of heat from the container.
  • an easily vaporizable material such as mercury
  • the vapor of difficultly vaporizable material such as sodium
  • This can be accomplished by enclosing the lamp in a transparent heat conservator, such as a double Walled glass bell having the space between the walls evacuated or filled with a gas having low heat conducting characteristics, such as argon or nitrogen.
  • the object-of the present invention is to provide a lamp unit comprising a gaseous electric discharge lamp device and a heat conservator therefor of suchstructure that cracks and leaks at the stem part of the container of the lamp into which the electrode leads are sealed are avoided. Still further objects and advantages attaching to the device and to its use and operation will be apparent to those skilled in the art from the following particular description.
  • the invention attains its objects by locating the stem part of the container outside the space enclosed by the heat conservator of the lamp unit and ventilating said stem part to maintain the temperature of said stem below that temperature at which said stem part cracks and leaks.
  • a gaseous electric discharge lamp device having a container 1, and electrodes 2 and 3 sealed therein.
  • Said electrode 2 is the cathode and consists of a metal filament, such as a tungsten filament, coated or impregnated with an electron emitting material and is electron emitting when heated.
  • Said electrodes 3 are annular anodes made of sheet metal, such as iron, and are located on opposite sides of said cathode 2 at equal distances therefrom.
  • Said electrodes 2 and 3 are supported in said container 1 by current leads 4 covered by insulating tubes 5, such as tubes of magnesium oxide.
  • Said leads 4 and said tubes 5 pass through the disc 6 which consists of metal, such as chromium steel or of insulating material, such as mica.
  • the rim of said disc 6 is contiguous to the inner wall of said container 1 and divides said container 1 into two parts. Said disc 6 is supported in said container 1 by the insulating tubes 5 making a frictional joint therewith and by the circular indentation 16 in the wall of said container 1.
  • a tube 17 of small internal diameter passes through said disc to facilitate the evacuation of that part of said container 1 between the disc 6 and the stem 7 during the manufacture of the device. The greater length of said tube 17 is located in that part of said container 1 between the disc 6 and the stem 7 and is below the condensation temperature of the metal'vapor filling during the operation of the lamp device.
  • Said container 1 is filled with a rare gas, such as neon or argon, and a quantity of vaporizable material, such as sodium, is located in the part of said container 1 surrounding the electrodes 2 and 3.
  • a rare gas such as neon or argon
  • a quantity of vaporizable material such as sodium
  • the electric discharge starts in the gas and the heat therefrom vaporizes the sodium so that the gaseous atmosphere in the device during the operation thereof is a mixture of sodium vapor and rare gas.
  • the passage through said tube 17 is closed during the first few hours of operation of the lamp device by deposits of condensed sodium.
  • the stem '7 is thus protected by the disc 6 from the chemical effects of the m0 metal vapor during the operation of the lamp device.
  • the stem '1 of said container 1 is located outside of said container 1 and said current leads 4 are sealed into said stem 7.
  • a base 8 made of insulating material, such as porcelain, bakelite, glass, or Philite. is cemented on said container 1.
  • Four contact pins 10 are mounted on said base 8 and said leads 4 are connected to said pins 10. Said contact pins 10 make elecno trical and frictional contact with sleeves in a .gen, at a low pressure.
  • a plurality of openings 11 are provided in the walls of said base 8 and adjacent the stem 7 for ventilation of said stem 7.
  • the base 8 below the holes 11 is filled with heat insulating material 9, such as asbestos.
  • a heat conservator in the form of a double walled jacket 12 encloses the part said container 1 surrounding the electrodes 2 and 3.
  • the space between the Walls of said jacket 12 is either evacuated or filled with a gas having low heat conducting characteristics, such as argon or nitro- Said jacket 12 reduces the radiation of heat from the walls of said container l to a minimum to maintain a high metal vapor pressure in said container 1.
  • the jacket 12 is supported by a metal ring 14 cemented thereto.
  • Said ring 14 has pins 18 which fit into slots in the holder. 15 as shown and the jacket 12 is easily removed from the holder 15 and the lamp unit.
  • a ring 13 comprising a metal spring covered with insulation material, such as asbestos, fits into the circular recess 16 of said container 1 and presses against the inner wall of jacket 12 to close the space between said container 1 and said jacket 12.
  • the stem part '7 and the part of said container 1 contiguous thereto is not enclosed by said jacket 12 and said parts are not subjected-to the heat insulating efiect of said jacket 12.
  • the part of said container 1 located between the disc 6 and the stem '7 is of considerable length so that the heating of stem 7 by the gaseous electric discharge between said electrodes 2 and 3 is reduced to a minimum.
  • the holes 11 permit the free radiation of heat from said stem 7. I have found that by virtue of the above described structure the stem 7 is at a lower temperature during the operation of the lamp unit than that temperature which would cause it to crack and leak.
  • a gaseous electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere therein, a stem for said container and a heat conservator for said container, said stem being out of said conservator.
  • a lamp unit comprising in combination, a gaseous, electric discharge device having a container, electrodes sealed therein, a gaseous atmosphere therein comprising a metal vapor, a stem for said container and a double walled envelope for said container whereby the radiation of heat from the container of said discharge device is reduced to a minimum, said stem being in a portion of said container which extends beyond the enclosing envelope.
  • a lamp unit comprising in combination, a gaseous electric discharge device having a container, electrodes sealed therein, a metal vapor in said container, a stem for said container and a double walled envelope for said container whereby the radiation of heat from the container of said discharge device is reduced to a minimum, said stem being in a portion of said container which extends beyond the enclosing envelope.
  • a lamp unit comprising in combination a gaseous electric discharge lamp device comprising a container, electrodes sealed therein, a vaporizable material therein, a stem for said container, a base for said container surrounding said stem, said base having ventilating means therein and a double Walled envelope for said container to reduce the radiation of heat therefrom to a minimum, said stem being in a portion of said container which extends beyond the enclosing envelope.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
US687230A 1932-09-26 1933-08-28 Gaseous electric discharge lamp device Expired - Lifetime US1951124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN34220D DE653844C (de) 1932-09-26 1932-09-26 Insbesondere fuer Lichtausstrahlung dienende elektrische Entladungsroehre mit Dampf schwer verdampfbarer Metalle

Publications (1)

Publication Number Publication Date
US1951124A true US1951124A (en) 1934-03-13

Family

ID=6477019

Family Applications (1)

Application Number Title Priority Date Filing Date
US687230A Expired - Lifetime US1951124A (en) 1932-09-26 1933-08-28 Gaseous electric discharge lamp device

Country Status (5)

Country Link
US (1) US1951124A (ko)
BE (1) BE398544A (ko)
DE (1) DE653844C (ko)
FR (1) FR43890E (ko)
GB (1) GB425219A (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457353A (en) * 1945-07-30 1948-12-28 Paragon Revolute Corp Quartz lamp assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457353A (en) * 1945-07-30 1948-12-28 Paragon Revolute Corp Quartz lamp assembly

Also Published As

Publication number Publication date
GB425219A (en) 1935-03-05
FR43890E (fr) 1934-09-07
DE653844C (de) 1937-12-04
BE398544A (ko)

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