US2076754A - Gaseous electric discharge lamp device - Google Patents

Gaseous electric discharge lamp device Download PDF

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Publication number
US2076754A
US2076754A US751620A US75162034A US2076754A US 2076754 A US2076754 A US 2076754A US 751620 A US751620 A US 751620A US 75162034 A US75162034 A US 75162034A US 2076754 A US2076754 A US 2076754A
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US
United States
Prior art keywords
container
heat
lamp
electrodes
lamp 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
US751620A
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English (en)
Inventor
Uyterhoeven Willem
Martinus Van Dam
Verburg Cornelis
Bruijnes Johannes
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
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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 US2076754A publication Critical patent/US2076754A/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
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
    • H01J61/523—Heating or cooling particular parts of the lamp

Definitions

  • the present invention relates to gaseous electric dischargelamp devices generally and more particularly the 4 invention relates to such devices the gaseous atmosphereof which consists of 5 or comprises the vaporof a diflicultlyvaporizable metal 1. e. a metal having a vapor pressure of less than 1 mm. at a temperature of 200 C., such as sodium, cadmium, thallium and zinc.
  • Heat conservators such as an evacuated envelope enclosing the lamp container, or a double walled jacket having the space between the inner and outer walls thereof evacuated and inwhichthe lamp container is mounted, which reduce the transfer of heat from the lamp container to the ambient atmosphere are useful in obtaining an effective metal vapor pressure in such devices, that is a vapor pressure such that the spectrum of the light emitted by the device is rich in rays characteristic of the metal vapor during the operation of the device.
  • Gaseous electric discharge lamp devices of this type usually have a surplus of vaporizable material therein and during the operation of the device this surplus material deposits on the part of the lamp/goytainer having the lowest temperature. Vania tens in ambient weather conditions, such as a cha ,”g'e in wind direction, causes different parts of 'the container to be at the lowest temperature during the operation of the device. This is particularly true when the lamp container is mounted in a double walled jacket since the difference in temperature of different parts of the walls of the lamp container is very small.
  • the objectof the present invention is to provide a lamp unit comprising a gaseous electric discharge vapor lamp device and a heat conservator therefor in which the surplus vaporizable material deposits 'on a definite spot on the walls 'of the lamp container. Still further objects and ad'- vantages attaching to the device and to its use and operation will be apparent to those skilled in the art fromthe following particular description.
  • the invention comprises a,thin, narrow coating of a material which is a good heat interceptor either by virtue of its good reflecting qualities or by virtue of its poor heat conducting characteristics in operative relation to the container of said lamp device which coating extends along the length of the lamp container.
  • a reflecting coating isapplied to the walls of the lamp container. When the lamp container is enclosed by an evacuated envelope a reflecting coating appliedto the wall of said envelope is efiective' for the purpose contemplated.
  • the reflecting coating is applied to the wall of the heat conservator for the lamp device.
  • the coating is applied to the inner surface of the heat conservator, that is, the surface facing the lamp device, the heat rays are reflected back and strike the wall of the lamp con tainer facing the reflecting coating and the temperature distribution over the walls of the .con-
  • the reflecting coating is applied to the. external surface of the lamp container wall.
  • the reflecting coating is applied to the surface of the wall of the heat conservator facing away from the lamp container tainer I.
  • Fig. 1 is a schematic view of one embodiment of the invention
  • Fig. 2 is a sectional view along the line 2-2 of Fig. 1,
  • Fig. 3 is a front elevational, partly sectional view of another embodiment of the invention.
  • Fig. 4 is a sectional view along the line 44of Fig. 3.
  • the new and novel gaseous electric discharge lamp device comprises an elongated tubular container l mounted in an elongated tubular, evacuated envelope 3.
  • Said container I has a filamentary electrode 2 sealed therein at each end thereof, a starting, rare gas, such as neon or argon, and a quantity of vaporizable material, such as sodium,
  • Said electrodes 2 consist of a filament
  • the electrodes 2 are wound in the form of ahelix.
  • the container I is supported in the envelope 3 by the electrode inleads which i are resilient to permit the container I and the en-" velope 3 to expand at different rates without fracturing the walls thereof.
  • Other support means are used for these elements I and 3 when desired.
  • a narrow strip 4 (shown in Fig. 2) having a reflecting surface, such as a thin silver coating, is applied to the outer'wall of said container I and extends along and is parallel with the discharge path between said electrodes 2.
  • a narrow strip 4 shown in Fig. 2 having a reflecting surface, such as a thin silver coating, is applied to the outer'wall of said container I and extends along and is parallel with the discharge path between said electrodes 2.
  • Said strip 4 reduces the radiation of heat from that part of the container I covered thereby and part 5 of the container I opposite said strip 4 is thus at a lower temperature than the coated part during the operationof the lamp device so that the deposits of condensed sodium form on said part 5 and the light emitted by the discharge between said electrodes 2 is transmitted without obstruction through the other parts of said con-
  • the narrow strip 4 offers so little ob- As illustrated in Fig. 2 of the drawing a narrow reflecting strip 6 can be applied to the inner surface of the envelope 3 instead of being applied to the outer wall of said container I, when desired.
  • the strip 6 reflects the heat rays from the discharge in said container I back to the wall of said container I opposite said strip 6 so that the part 5 of said container isagain at a lower temperature than the part thereof opposite said strip 6 with the result pointed out above.
  • the narrow reflecting coating be a dust-like deposit, or a very thin film which transmits all the visible light emitted by the lamp device but which reflects the infraered, or heat rays emitted by the device.
  • a coating is applied to the lamp container or the heat conservator by methods well known in the art, such as by chemical deposition or cathode sputtering.
  • Said container 1 has a thin, narrow strip I2 of heat insulating material, such as asbestos, applied on the exterior surface of the walls thereof and on opposite sides thereof which strips I2 reduce the dissipation of heat from the parts of the walls covered thereby.
  • the parts I3 of said container I are thus the coolest parts of said container I during the operation of the lamp device and the condensed metal vapordeposits on said parts I3 so that the other parts of said container I are unobstructed by light opaque deposits.
  • a gaseous electric discharge device comprising a container, electrodes sealed therein, a gaseous atmosphere and a vaporizable material therein, a narrow strip heat interceptor applied to the wall of said container, said strip being electrically isolated from said electrodes and extending along and being parallel to the discharge path between said electrodes to reduce the dissipation of heat from the part of said container covered by said heat interceptor whereby deposits of condensed vaporous material are localized at a selected part of said container.
  • a lamp unit comprising in combination a gaseous electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere therein and a vaporizable material therein, a heat conservator for said lamp device and a narrow heat interceptor applied to the walls of said lamp unit, said heat interceptor being electrically isolated from said electrodes and being interposed between said lamp device and the ambient atmosphere to localize the deposits of condensed vaporous material in said container at a selected point.
  • a lamp unit comprising in combination a heat conservator and a gaseous electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere and a vaporizable material therein, a narrow strip heat interceptor applied to the wall of said container, said strip being electrically isolated from said electrodes and extending along and being parallel to the discharge path between said electrodes to reduce the dissipation of heat from the part of said container covered by said heat interceptor whereby deposits of condensed vaporous material are localized at a selected part of said container, said heat conservator reducing the dissipation of heat by conduction and convection from the walls of said container.
  • a lamp unit comprising in combination a heat conservator and a gaseous electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere and a vaporizable material therein, a narrow strip heat interceptor applied to the wall of said heat conservator, said strip being electrically isolated from said electrodes and extending along and being parallel to the discharge path between said electrodes of said lamp device to reduce the dissipation of heat from the part of the container wall opposite the part of said heat conservator covered by said heat interceptor whereby deposits of condensed vaporous material are localized at a selected part of said container, said heat conservator reducing the dissipation of heat by conduction and convection from the walls of said lamp container generally.
  • a lamp unit comprising in combination a heat conservator and a gaseous electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere and a vaporizable material therein, a narrow strip heat interceptor applied to the wall of said container, said strip being electrically isolated from said electrodes and extending along and being parallel to the discharge path between said electrodes to reduce the dissipation of heat from the part of said container covered by said heat interceptor whereby deposits of condensed vaporous material are localized at a selected part of said container, said heat conservator being an evacuated envelope" enclosing said lamp container and reducing the dissipation of heat by conduction and convection from the walls of said container.
  • a lamp unit comprising in combination, a heat conservator and a gaseous electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere and a vaporizable material therein, a narrow strip heat interceptor applied to the wall of said heat conservator, said heat conservator being an evacuated envelope enclosing said lamp container, said strip being electrically isolated from said electrodes and extending along and being parallel to the discharge path between said electrodes of said lamp device to reduce the dissipation of heat from the part of the container wall opposite the part of said heat conservator covered by said heat interceptor whereby deposits of condensed vaporous material are localized at a selected part of said container, said heat conservator reducing the dissipation of heat by conduction and convection from the walls of said-iampcontainer generally.
  • a lamp unit comprising in combination a heat conservator and a gaseous electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere and a vaporizable material therein, a, narrow strip heat interceptor applied to the wall of said container, said strip being electrically isolated from said electrodes and extending along and being parallel to the discharge path between said electrodes to reduce the dissipation of heat from the part of said container covered by said heat interceptor whereby deposits of condensed vaporous material are 10- calized at a selected part of said container, said heat conservator being a double walled jacket having the space between the inner and outer walls thereof evacuated and reducing the dissipation of heat by conduction and convection from the walls of said container.
  • a lamp unit comprising in combination a heat conservator and a gaseous electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere and a vaporizable material therein, a narrow strip heat interceptor applied to the wall of said heat conservator, said heat conservator being a double walled jacket having the space between the inner and outer walls thereof evacuated, said strip being electrically isolated from said electrodes and extending along and being parallel to the discharge path between said electrodes of said lamp device to reduce the dissipation of heat from the part of the container wall opposite the part of said heat conservator covered by said heat interceptor whereby deposits of condensed vaporous material are localized at a selected part of said container, said heat conservator reducing the dissipation of heat by conduction and convection from the walls of said lamp container generally.
  • a lamp unit comprising in combination a gaseous electric discharge lamp device comprising a container, electrodes sealed therein, a gaseous atmosphere therein and a vaporizable material therein, a heat conservator for said lamp device and a narrow heat interceptor applied to the vwalls of said lamp unit, said heat interceptor being electrically isolated from said electrodes, being interposed between said lamp device and the ambient atmosphere and having an infra-red ray reflecting surface facing'the discharge path between said electrodes to localize the deposits of condensed vaporous material in said lamp container at selected parts of said container.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Physical Vapour Deposition (AREA)
US751620A 1933-11-06 1934-11-05 Gaseous electric discharge lamp device Expired - Lifetime US2076754A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN35923D DE613573C (de) 1933-11-06 1933-11-06 Elektrische, vornehmlich zur Lichtausstrahlung dienende Entladungsroehre, die Dampf schwer fluechtigen Metalls enthaelt

Publications (1)

Publication Number Publication Date
US2076754A true US2076754A (en) 1937-04-13

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ID=40612883

Family Applications (1)

Application Number Title Priority Date Filing Date
US751620A Expired - Lifetime US2076754A (en) 1933-11-06 1934-11-05 Gaseous electric discharge lamp device

Country Status (5)

Country Link
US (1) US2076754A (de)
DE (1) DE613573C (de)
FR (1) FR780849A (de)
GB (1) GB429568A (de)
NL (1) NL41668C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479548A (en) * 1966-07-06 1969-11-18 Airequipt Inc Enveloped quartz iodine lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479548A (en) * 1966-07-06 1969-11-18 Airequipt Inc Enveloped quartz iodine lamp

Also Published As

Publication number Publication date
DE613573C (de) 1935-05-21
FR780849A (fr) 1935-05-04
NL41668C (de) 1937-10-15
GB429568A (en) 1935-05-31

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