US2100886A - Electric incandescent lamp - Google Patents

Electric incandescent lamp Download PDF

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Publication number
US2100886A
US2100886A US131464A US13146437A US2100886A US 2100886 A US2100886 A US 2100886A US 131464 A US131464 A US 131464A US 13146437 A US13146437 A US 13146437A US 2100886 A US2100886 A US 2100886A
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US
United States
Prior art keywords
per cent
krypton
argon
nitrogen
lamp
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
US131464A
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English (en)
Inventor
Johannes A M Van Liempt
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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 US2100886A publication Critical patent/US2100886A/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
    • H01K1/50—Selection of substances for gas fillings; Specified pressure thereof

Definitions

  • My invention relates to electric incandescent lamps comprising a sealed envelope containing a filament, such as a tungsten filament, and having a gas filling therein, and more particularly to 5 lamps having a gas filling comprising krypton.
  • the gas filling in use at the present time con sists of a. mixture of argon and nitrogen. It has been proposed to provide as a gas filling a mixture of krypton and nitrogen to increase the efliciency of the lamps. However, because of the high cost of krypton such a mixture makes the lamps rather expensive.
  • a surprisingly high efflciency 18 is retained when a portion of the krypton is replaced by argon. This is especially the case when the lamp contains a mixture of krypton, argon and nitrogen in which not more than twenty-five per cent by volume of the total gas 20 volume is nitrogen, and the remaining part, consisting of krypton and argon, contains at least sixty per cent and not more than ninety-five per cent by volume of krypton.
  • krypton is referred to it will be understood that a mixture of krypton and xenon or pure xenon may be substituted therefor.
  • a gas filling in which the gases krypton and argon are present in a ratio by volume of about 7:2 is considered as most advantageous.
  • the incandescent lamp may contain, for example, seventy per cent of krypton, twenty per cent of argon and ten per cent of nitrogen, by volume.
  • the abscissa represents increasing amounts of krypton from left to right (A to B) and increasing amounts of argon from right to left (B to A), the nitrogen content being in all cases ten per cent by volume of the total gas volume. Therefore the point A represents a lamp with an argon content ofninety per cent and a nitrogen content of ten per cent, by volume, there being no krypton in this lamp.
  • the point B then represents a lamp in which the filling consists of ninety per cent of krypton and ten per cent of nitrogen, by volume, with no argon.
  • the points between A and B represent lamps which, in addition to the ten per cent of 5 nitrogen, contain both argon and krypton.
  • the point C represents a lamp which contains a filling of forty-five per cent argon, forty-five per cent krypton and ten per cent nitrogen
  • the point D represents a lamp containing seventy 10 per cent krypton, twenty per cent argon and ten per cent nitrogen.
  • the points on the ordinate of the graph represent the values of efiiciency E of the lamps where these values are expressed by the relation between the radiated lumens and the watts consumed for a life of 1000 burning hours, recalculated to a definite comparable value.
  • the line drawn in this graph represents the mean value of a great number of experimentally determined 20 values derived from lamps of different voltage and wattage.
  • the point G on the graph indicates an actual value of efiiciency for a number of lamps of different voltage and wattage which, however, contained the same filling of forty-five per cent argon, fortyfive per cent krypton and ten per cent nitrogen.
  • the point H likewise indicates the mean value of efliciency for a number of lamps containing seventy per cent krypton, twenty per cent argon.
  • Anelectric incandescent lamp having a gas filling consisting of krypton, argon and nitrogen,
  • the amount of nitrogen being not more than twenty-five per cent by volume of the mixture, and the amount of krypton in the remaining krypton-argon mixture being between sixty per' cent and ninety-five per cent by volume.
  • An electric incandescent lamp having a gas filling consisting of krypton, argon and nitrogen, the amount of nitrogen being not more than twenty-five per cent by volume of the mixture,

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  • Discharge Lamp (AREA)
US131464A 1936-04-15 1937-03-17 Electric incandescent lamp Expired - Lifetime US2100886A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE484355X 1936-04-15

Publications (1)

Publication Number Publication Date
US2100886A true US2100886A (en) 1937-11-30

Family

ID=6543102

Family Applications (1)

Application Number Title Priority Date Filing Date
US131464A Expired - Lifetime US2100886A (en) 1936-04-15 1937-03-17 Electric incandescent lamp

Country Status (4)

Country Link
US (1) US2100886A (en:Method)
BE (1) BE421039A (en:Method)
FR (1) FR820587A (en:Method)
GB (1) GB484355A (en:Method)

Also Published As

Publication number Publication date
BE421039A (en:Method)
FR820587A (fr) 1937-11-15
GB484355A (en) 1938-05-04

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