US2009221A - Gaseous electric discharge device - Google Patents

Gaseous electric discharge device Download PDF

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Publication number
US2009221A
US2009221A US730104A US73010434A US2009221A US 2009221 A US2009221 A US 2009221A US 730104 A US730104 A US 730104A US 73010434 A US73010434 A US 73010434A US 2009221 A US2009221 A US 2009221A
Authority
US
United States
Prior art keywords
container
septum
electric discharge
stem
metal vapor
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
US730104A
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English (en)
Inventor
Bruijnes Johannes
Schouwstra Pieter
Bernard Van Engel
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 US2009221A publication Critical patent/US2009221A/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
    • H01J61/04—Electrodes; Screens; Shields

Definitions

  • the present invention relates to gaseous electric discharge devices generally and more particularly the invention relates to such devices the gaseous atmosphere of which consists wholly or 5 in part of a metal vapor.
  • the stem parts of the container of such a device can be made of a glass nonresistant to chemical attack by the metal vapor but having better sealing qualities with the current leads than does the vapor resistant glass.
  • the formation of any conducting deposits of con-' densed metal between the current leads in the stem part of the container is avoided in a device of this structure.
  • the spaces on either I side of the septum are connected by a long, narrow communicating passage so that all parts of the container can be evacuated through asingle exhaust tube'during the manufacture of the device.
  • the travel of the metal vapor along the narrow communicating passage is very slow and the passage is closed by condensed deposits of vaporous material in the cooler stem end thereof after the device has been operating a comparatively short time.
  • Patent Number 1,961,897, grantedJune 5, 1934, to Cornelis 301 discloses a similar gaseous electric discharge device having material reactive with the metal vapor mounted in operative relation to the stem end of the communicating passage to bind any metal or metal vapor which might seep through said passage and thus positively protectthe non-resistant glass stem of the container from attack by the metal vapor during the operation of the device.
  • the object of the present invention is to improve the structure of gaseous electric discharge devices of the above type. 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 Still further objects description thereof and from the appended claims.
  • the new and novel gaseous electric discharge device comprises a plurality of elongated hollow bodies, rectangular in cross section, made of insulating material and extending through the septum in the container of the device.
  • Each of said bodies surrounds a current lead circular in cross section.
  • a plurality of narrow, elongated, communicating passages are thus provided to connect the spaces on either side of the septum and the current leads are closely surrounded by insulating material.
  • the hollow bodies, rectangular in cross section are grouped together and pass through a single opening in the septum, when desired, which simplifies the manufacture of the device and makes the electrode mount very strong and rigid.
  • the stem part of the container is filled with a material reactive with the metal vapor present in the container of the device to bind any metal vapor which might seep through the communicating passages during the operation of the device and to protect the non-resistant stem parts of the container from chemical attack by the metal vapor.
  • a reactive material having a large effective surface compared to its mass, such as glass wool, is desirable because it is particularly efiective for the purpose contemplated and is easily placed in the stem part of the container during the manufacture of the device.
  • Fig. l is a front elevational, partly sectional view of the gaseous electric discharge device.
  • Fig. 2 shows a'detail, in section, of the device illustrated in Fig. 1.
  • the new and novel gaseous electric discharge lamp device comprises a container I having an inverted stem 9, III fused thereto,
  • the part of said container I surrounding the electrodes 4 and 5 is closed off from the stem part 9, l thereof by septum 2 made of chrome steel, for example, and the space between the rim of said septum 2 and the wall of said container 1 is sealed by a body 6 consisting of a mixture of talcum and water glass.
  • the electrodes 4 and consist of a pair of anodes 5 of annular shape and a cathode 4 which is electron emitting when heated.
  • Said cathode 4 consists of a coiled metal filament, such as tungsten or nickel filament, coated with electron emitting material, such as barium oxide.
  • Said cathode 4 is viewed end-on in the drawing.
  • the anodes 5 are mounted on opposite sides of said cathode 4 at substantially equal distances therefrom.
  • Said electrodes 4 and 5 are mounted on current leads I and each of said current leads I is surrounded by an elongated, hollow body 8, rectangular in cross section, as shown in Fig. 2, and which consists of insulating material, such as magnesium oxide.
  • Said bodies 8 are grouped together in a, compact bundle and extend through a rectangular opening in said septum 2.
  • the space between the bodies 8 and the opening in said septum 2 is closed by a body of cement, such as a solution of talcum in water glass.
  • the bodies 8 extend from the electrodes 4 and 5 into the space 3 of said container I.
  • the space 3 between the septum 2 and the stem 9, I0 is filled with a material I2 reactive with the particular metal present in the upper part of said container I to bind any metal or metal vapor which should seep through the passages between the leads 1 and the bodies 8 during the operation of the device and to protect the stem parts 9 and ill from the metalvapor.
  • the communicating passages should be closed by deposits of condensed material but even if some of said passages remain open the material i2 is sufficient to protect the parts of the container between the septum 2 and the stem part 9 from attack by the metal vapor. It is advantageous that the material i2 have a large surface compared to its mass and glass wool is'excellent for this purpose.
  • the sodium vaporizes during the operation of the lamp device and the spectrum of the light emitted by the lamp is rich in the characteristic rays of the sodium vapor.
  • lead glass wool is a suitable binding material to place in the space 3 of said container I.
  • the gaseous atmosphere consists of, or comprises a diflicultly vaporizable material, such as sodium
  • a heat conservator such as a double .walled jacket having the space between the walls evacuated or filled with a gas having poor heat conductivity characteristics, in which the lamp device is mounted is eifective for this purpose.
  • the inner wall of that part of said container i surtounding the electrodes 4 and 5 consists of a glass resistant to the chemical efiects of the hot metal vapor present in said container l during the operation of the device.
  • Such glasses are now known in the art as borosilicate glasses.
  • a gaseous electric discharge device comprising a container, electrodes sealed therein, a gaseous atmosphere therein. comprising a metal vapor, a septum in said container closing oif the part of said container enclosing the electrodes from the stem part of said container, current leads for said electrodes, said leads being sealed into said stern and passing through said septum elongated, hollow bodies of insulating material surrounding said current leads, said leads being circular in cross-section and said bodies being rectangular in cross-section.
  • a gaseous electric discharge device comprising a container, electrodes sealed therein, a gaseous atmosphere therein comprising a metal vapor, a septum in said container closing off the part of said container enclosing the electrodes from the stem part of said container, current leads for said electrodes, said leads being sealed into said stem and passing through said septum, elongated, hollow bodies of insulating material surrounding said current leads, said leads being circular in crow-section and said bodies being rectangulanin cross-section, the space between the stem part of said container and said septum having a material therein reactive with said metal vapor, the surface of said material being large compared to its mass.
  • a gaseous electric discharge device comprising a container, electrodes sealed therein, a gas-- eous atmosphere therein comprising a metal vapor, a septum in said container closing off the part of said container enclosing the electrodes from the stem part of said container, current leads for said electrodes, said leads being sealed into said stem and passing through said septum, elongated, hollow bodies of insulating material surrounding said current leads, said leads being circular in cross-section and said bodies being rectangular in cross-section, said bodies being grouped together and passing through an open-' ing in said septum.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
US730104A 1933-06-24 1934-06-11 Gaseous electric discharge device Expired - Lifetime US2009221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL65787A NL40357C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1933-06-24 1933-06-24

Publications (1)

Publication Number Publication Date
US2009221A true US2009221A (en) 1935-07-23

Family

ID=34056974

Family Applications (1)

Application Number Title Priority Date Filing Date
US730104A Expired - Lifetime US2009221A (en) 1933-06-24 1934-06-11 Gaseous electric discharge device

Country Status (5)

Country Link
US (1) US2009221A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE632434C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR44905E (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB433811A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (3) NL40357C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2459567A (en) * 1946-12-21 1949-01-18 Gen Electric Positive column lamp
US2687471A (en) * 1948-05-01 1954-08-24 Western Union Telegraph Co Concentrated arc discharge device
US2881345A (en) * 1953-02-03 1959-04-07 Claude General Neon Lights Ltd Low pressure mercury vapour electric discharge lamps
EP0446462A3 (en) * 1990-03-15 1992-03-11 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh High-pressure discharge lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1056742B (de) * 1956-01-13 1959-05-06 British Thomson Houston Co Ltd Elektrische Natriumdampf-Entladungslampe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2459567A (en) * 1946-12-21 1949-01-18 Gen Electric Positive column lamp
US2687471A (en) * 1948-05-01 1954-08-24 Western Union Telegraph Co Concentrated arc discharge device
US2881345A (en) * 1953-02-03 1959-04-07 Claude General Neon Lights Ltd Low pressure mercury vapour electric discharge lamps
EP0446462A3 (en) * 1990-03-15 1992-03-11 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh High-pressure discharge lamp
US5248913A (en) * 1990-03-15 1993-09-28 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen M.B.H. High pressure discharge lamp

Also Published As

Publication number Publication date
FR44905E (fr) 1935-05-01
NL65787B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL43503C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1938-07-15
DE632434C (de) 1936-07-08
GB433811A (en) 1935-08-21
NL40357C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1937-03-15

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