US2056907A - Gaseous electric discharge device - Google Patents

Gaseous electric discharge device Download PDF

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Publication number
US2056907A
US2056907A US592138A US59213832A US2056907A US 2056907 A US2056907 A US 2056907A US 592138 A US592138 A US 592138A US 59213832 A US59213832 A US 59213832A US 2056907 A US2056907 A US 2056907A
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US
United States
Prior art keywords
container
electrodes
electric discharge
discharge
septum
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
US592138A
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English (en)
Inventor
Pirani Marcello
Becker Karl
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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 US2056907A publication Critical patent/US2056907A/en
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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
    • H01J61/10—Shields, screens, or guides for influencing the discharge

Definitions

  • the present invention relates to gaseous electric discharge device'sgenerally and more particularly the invention relates to such devices in which the gaseous electric discharge is of the concentrated or so-called stringy type.
  • This type of discharge is produced when the gas or vapor pressure and the current are higher than those used when "a diffuse discharge is desired in an electric discharge device;
  • Such a discharge possesses two advantages, first, it is more eflicient giving a more intense light emission, and second, since the discharge occupies onlya small portion oithe cross section of the tube, a. glass having a lower melting point and being more easily workable may be used than if the same current were used in an identical device without a "stringy" discharge.
  • This latter advantage hasv not been obtained in previous devices of-this type since the stringy gaseous electric discharge colzg umn constantly changed its position in the container and often closelyapproached the container walls to their great injury.
  • the object of the present invention is to provide 'an electric discharge device having a g5; stringy electric arc dischargedn which the con tainer is made of a softer glass than has hitherto been found practical in similar devices having a "stringy electric arc discharge. Still further objects and advantages attaching to the device and so to its use and operation will be apparent to them skilled in the. art from. the following particular description.
  • the invention attains its object by providing along the positive column discharge path between the electrodes of a gaseous electric discharge deyice one or more septums perpendicular to the longitudinal axis of the container of. said device, said septum having a diameter which closely approaches the inner diameter of said container and has an opening therein concentric-with the longitudinal axis of said container. Said septum.
  • septums guide the stringy electric discharge in said container to prevent said discharge from approaching too closely the soft glass walls of said container and thus serve to protect said walls from injury thereby.
  • the septum is supported in the container byany of the methods well known a in the art.
  • Said septum is madeoi a material having a higher melting point than the walls of said container and may be of quartz or of a high melting point metal such as molybdenum, or I tungsten. If. the septum is of metalit should be thoroughly degassed before thedevice is placed into operation.
  • Each of the discharge supporting electrodes of the device in, the preferred embodiment is sur-. rounded by a cylinder made of like materials as said septum and partially closed in the direction of the discharge path to guide the discharge. in .the region of the electrodes and thus to protect 5 the soft glass walls of the container in that region.
  • FIG. 1 is a side elevational, partly sectional view of one embodiment of the invention.
  • Fig. 2 is a similar view of another embodiment of the invention. 1
  • the new and novel gaseous electric discharge device comprises a container I having a thermionic electrode 2 at each end thereof. Electrode leads 3 of said electrodes 2 are sealed into the pinch parts 4 of stems 5 of said container I. Said electrodes 2 are of the sintered, mixed metal and oxide type made in accordance with the disclosure of co-pending application, Serial Number 377,044, filed July 9, 1929 being the invention of Marcello Pirani and Hans Ewest, or when desired any other suitable type of thermionic electrode maybe used. Said electrodes Z'are brought to an electron emitting temperature by an initial glow discharge which rapidly turns into thedesir-ed arc discharge, or when desired by a heating filament adapted for that purpose.
  • a septum t which, when desired, is of ,metal such as molybdenum is provided in said container i equidistant from the ends .of said container l and is perpendicular to the-longitudinal axis of said container 5. Said septum t is supported in said container l by flange 8 thereof pressing against the inner wall of said container 6 and the diameter of said septum 6 is co-extensive with the inner diameter of said container E.
  • An annular opening I is provided in -said septum 6, and said opening 1 is concentric with the longitudinal axis of the container 6.
  • Each of said electrodes 2 is surrounded by a metal cylinder 9 which is concentric therewith and which has in the direction of the discharge path a flange ill with an opening ll therein, and said opening it is concentric with the longitudinal axisof the container I.
  • Said shells 9 are supported by supports ll' sealed in pinch-partst oi. stems 5,
  • Said container i isgreater in diameter in the middle thereof than atits ends to maintain septum 8 in desired positionland is filled with.
  • tainer I In such a device a current of 34 amperes with a potential of--29 volts and 1000 watts applied to the electrodes 2 of the device produces a concentrated, stringy electric discharge between said electrodes which is guided by openings i and ii and prevented from changing its position sufficiently-from the normal discharge path between said electrodes 2 to injuriously affeet the walls of said container, so that a softer glass may be used in the walls of said container ll than in a similar device in which the stringy electric discharge is not guided.
  • the cylinder 9 surrounding said electrode 2 is connected by a lead I l having therein resistance I3, to the lead 3 of that electrode 2 to which it is adjacent, as illustrated in dotted lines on the left side of the drawing.
  • This construction creates an electric field about each of the electrodes 2 to decrease the rate of disintegration thereof, and, further, when desired, said cylinder 9 is connected by lead l6, containing a high resistance I5, to the lead 3 of the electrode 2 opposite that electrode 2 to which it is adjacent, as illustrated in dotted lines in the right side of the drawing, said cylinders 9 then serve as auxiliary electrodes during the starting of the device.
  • the invention lends itself to a curved type of container in addition to the substantially straight type shown-and described in Fig. 1.
  • the electrodes 2 in the container I are in the same plane and close to each other and the container l is in the shape of two substantially parallel tubes'perpendicular to the plane of said electrodes 2 with a curved tube portion connecting said parallel tubes, perforated septums S, 6',
  • An electric arc discharge device comprising a container, electrodes sealed therein, a gaseous atmosphere therein under a pressure high enough to support an arc discharge, and a perforated septum separated ,from said electrodes and mounted along the part of the discharge path between said electrodes occupied by the positive column'of an arcdischarge, said septum being transverse to the discharge path in said. container and guiding an electrical constricted arc discharge in said container away from the walls thereof'to prevent destructive action thereby on the main wall of said container.
  • An electric discharge device comprising a container, electrodes sealed therein,--a gaseous.
  • said electrodes being surcylinders being adapted to guide the electric discharge in said container away from the walls thereof.
  • An electric discharge device comprising a curved container, electrodes sealed therein, a gaseous atmosphere therein, and a perforated septum along the discharge path between 'said electrodes, said septum beingtransverse to the discharge path and located at the bends in said container between said electrodes and adapted to guide the electric discharge in said container away from the walls thereof.
  • An electric discharge device comprising a curved container, electrodes sealed therein, a
  • perforated septums in said container, said electrodes being in the same plane, said container comprising two parallel portions perpendicular tion connecting said parallel portions, said perforated septums being arranged along and transverse'to the dischargepath and at the bends in said container so that the path of the electric discharge extending from electrodes to the opening in the septum and fromthe opening in one septum to the opening in another septum is not invaded by the walls of said container.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US592138A 1931-02-27 1932-02-10 Gaseous electric discharge device Expired - Lifetime US2056907A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP62446D DE577690C (de) 1931-02-27 1931-02-27 Elektrische Leuchtroehre mit Gluehelektroden und eingeschalteter Entladung
DEP64320D DE579935C (de) 1931-02-27 1931-11-25 Elektrische Leuchtroehre mit Gluehelektroden und eingeschnuerter Entladung

Publications (1)

Publication Number Publication Date
US2056907A true US2056907A (en) 1936-10-06

Family

ID=31950115

Family Applications (2)

Application Number Title Priority Date Filing Date
US592138A Expired - Lifetime US2056907A (en) 1931-02-27 1932-02-10 Gaseous electric discharge device
US642319A Expired - Lifetime US2056152A (en) 1931-02-27 1932-11-11 Gaseous electric discharge device

Family Applications After (1)

Application Number Title Priority Date Filing Date
US642319A Expired - Lifetime US2056152A (en) 1931-02-27 1932-11-11 Gaseous electric discharge device

Country Status (6)

Country Link
US (2) US2056907A (de)
AT (1) AT130417B (de)
DE (2) DE577690C (de)
FR (1) FR729154A (de)
GB (2) GB377584A (de)
NL (1) NL37581C (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968579C (de) * 1941-09-02 1958-03-06 Felix Mueller Dr Ing Elektrische Hochdruck-Entladungsroehre fuer Beleuchtungs- und Strahlungszwecke
DE912243C (de) * 1950-08-11 1954-05-28 Dr Franz Skaupy Leuchtstoffroehre
DE1065091B (de) * 1956-11-22 1959-09-10 Kenneth J Germeshausen Roehrenfoermige Blitzlichtentladungslampe
DE4122694A1 (de) * 1990-07-20 1992-01-23 Samsung Electronic Devices Metallhalogenlampe
DE19516049A1 (de) * 1995-05-04 1996-11-07 Walter Holzer Zünd- und Stromversorgungsschaltung für Gasentladungslampen

Also Published As

Publication number Publication date
NL37581C (de) 1936-03-16
DE577690C (de) 1933-07-13
FR729154A (fr) 1932-07-19
DE579935C (de) 1933-07-18
AT130417B (de) 1932-11-25
GB393849A (en) 1933-06-15
GB377584A (en) 1932-07-28
US2056152A (en) 1936-10-06

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