US2203897A - Electric incandescent lamp - Google Patents

Electric incandescent lamp Download PDF

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Publication number
US2203897A
US2203897A US237365A US23736538A US2203897A US 2203897 A US2203897 A US 2203897A US 237365 A US237365 A US 237365A US 23736538 A US23736538 A US 23736538A US 2203897 A US2203897 A US 2203897A
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US
United States
Prior art keywords
lamp
zirconium
nitrogen
filament
electric incandescent
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
US237365A
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English (en)
Inventor
Graaff Antonius De
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 US2203897A publication Critical patent/US2203897A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/52—Means for obtaining or maintaining the desired pressure within the vessel
    • H01K1/54—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering
    • H01K1/56—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering characterised by the material of the getter

Definitions

  • my invention relates to socalled played as a getter in electric incandescent. lamps having a gas filling that contains a certain qua'n tity of nitrogen for the reason that the zirconium,-
  • the nitrogen: illthfi' ga's filling serves to '1 give a suitably high value to the breakdown voltage of'the gasilllingwhich, as a rule,.con-
  • One object of my invention is to provide a getter which will eilectively absorb the residual gases in an electric incandescent-lamp to there.-'
  • Another object of my invention is the provision of a getter, in an electric incandescent lamp having a gaseous filling consisting partly .of nitrogen, which will effectively absorb the impurities in the gaseous filling and the traces of residual gas but not the nitrogen.
  • Still another object of my invention is the provision of a gas-fllled electric incandescent lamp with a getter located at a point in the lampbulb where the temperature, during lamp operation, is within a certain definite range whereby the getter will eflfectively absorb the impurities in the gaseous filling and the traces oi residual gas but not the nitrogen containedin the gaseous filling.
  • zirconium will or will not absorb certain gases depending upon the temperature to which it is heated. Conseuuently, a so-called selective absorption "by the mrconiugm takes place.
  • This fact is utilized in the l pfia'ccarding to the invention-in order to absoi'bjthe hydrogen or hydrogen compounds which are always located in the metal parts of the lamp, such as the nickel current supply wires and the like, and which are liberated during the "operation of the lamp.
  • the hydrogen and hydrogen compounds have a destructive effect on the material of the filament, such as tungsten, which. effect-is unfavorable to the properties of the filament.
  • the liberated hydrogen together with the traces of oxygen which are always present in the lamp, will result in the socalled water cycle, while a certain hydrogen compound, such as a hydrocarbon, will, in addition, carburize the filament and thereby-give the lamp a lesser degree of resistance to shocks.
  • a certain hydrogen compound such as a hydrocarbon
  • the zirconium parts can, according to the invention, be provided for instance on the stem'press of the lamp. In the case of automobile lamps, such as shown in Patent 1,716,048,A.
  • the zirconium can be conveniently applied to this shield. It is also possible to provide the zirconium at a suitable point on the current supply wires.
  • the zirconium can be placed in the lamp in the pulverulent state'or in any other suitable form, such as in the form of a wire, strip, or foil. It is obviously desired to degasiiy the zirconium as thoroughly as possible before it is used. This degasiiication is carried out pref:- erably by annealing the mrconium in a high vacuum.
  • the disadvantage occurs, when the invention is not utilized, that due to the water cycle the lamp blackens relatively more rapidly whereby a considerable portion of the light emitted by the filament is absorbed. Especially when the available bulb surface is small is this disadvantage of importance. This is particularly the case in those lamps in which a filament with a rather high power consumption is used in a small bulb, which is the case, for instance, in automobile lamps. The blackening is particularly evident in that type of automobile lamp in which the filament is partly surrounded by a shield, because in such lamps very many metal parts are located in a relatively small bulb volume. In such lamps, the use of zirconium according to the invention is highly advantageous.
  • the lamp comprises a glass bulb Ill containing a gaseous atmosphere comprising nitrogen and enclosing a major filament II and a minor filament H, with a metal shield l3 located under the said minor filament.
  • the said filament H is connected to leads l4 and I5, and filament I2 is connected, through shield It, to common lead II and tolead ii.
  • the said leads II, II and I! extend through a glass stem.
  • a quantity oi zirconium I8 is preferably disposed on the stern II. If desired, the zirconium l9 may be disposed on the shield It, as indicated by dotted lines.
  • An electric incandescent lamp comprising an envelope having a, gas filling containing nitrogen, and a body of metallic zirconium within said envelope,,said body being located at a point in said envelope at which the temperature, during operation of the lamp, is of the order of magnitude of 200 C. to not over about 600 C. whereby the heated zirconium abjsorbs hydrogen and hydrogen compounds-present in the lamp but does not appreciably absorb the nitrogen in the lamp.
  • An electric incandescent lamp comprising an envelope having a gas filling containing nitrogen, a filament insaid envelope, a stem extending into said envelope for supporting said filament, and a body of metallic zirconium located within said envelope on said stem where it is heated to a temperature of .the order of 200 C. to not over about 600 C. whereby the heated zirconium ab- What I claim as new and desire to secure by sorbs hydrogen and hydrogen compounds present in the lamp but does not appreciably absorb the nitrogen in the lamp.
  • ANTONIUS or: GRAAFF.

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Discharge Lamp (AREA)
US237365A 1937-11-02 1938-10-27 Electric incandescent lamp Expired - Lifetime US2203897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL208437X 1937-11-02

Publications (1)

Publication Number Publication Date
US2203897A true US2203897A (en) 1940-06-11

Family

ID=19778687

Family Applications (1)

Application Number Title Priority Date Filing Date
US237365A Expired - Lifetime US2203897A (en) 1937-11-02 1938-10-27 Electric incandescent lamp

Country Status (7)

Country Link
US (1) US2203897A (en(2012))
BE (1) BE430899A (en(2012))
CH (1) CH208437A (en(2012))
DE (1) DE711881C (en(2012))
FR (1) FR845482A (en(2012))
GB (1) GB520835A (en(2012))
NL (1) NL51546C (en(2012))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455394A (en) * 1943-06-29 1948-12-07 Sperry Corp Accelerometer
US3519864A (en) * 1966-12-29 1970-07-07 Sylvania Electric Prod High pressure electric discharge device with barium peroxide getter and getter mounting structure

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462837A (en) * 1945-10-08 1949-03-01 Tung Sol Lamp Works Inc Incandescent lamp
US2489261A (en) * 1948-04-15 1949-11-29 Tung Sol Lamp Works Inc Metallic filament incandescent electric lamp and the manufacture thereof
DE1015145B (de) * 1953-12-05 1957-09-05 Egyesuelt Izzolampa Gasgefuellte elektrische Gluehlampe, insbesondere mit einem Schirm versehene gasgefuellte Gluehlampe, z.B. Autolampe, und dafuer bestimmter Getter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455394A (en) * 1943-06-29 1948-12-07 Sperry Corp Accelerometer
US3519864A (en) * 1966-12-29 1970-07-07 Sylvania Electric Prod High pressure electric discharge device with barium peroxide getter and getter mounting structure

Also Published As

Publication number Publication date
FR845482A (fr) 1939-08-24
BE430899A (en(2012))
CH208437A (de) 1940-01-31
GB520835A (en) 1940-05-06
NL51546C (en(2012))
DE711881C (de) 1941-10-08

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