US1648677A - Incandescent electric lamp - Google Patents

Incandescent electric lamp Download PDF

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Publication number
US1648677A
US1648677A US145914A US14591426A US1648677A US 1648677 A US1648677 A US 1648677A US 145914 A US145914 A US 145914A US 14591426 A US14591426 A US 14591426A US 1648677 A US1648677 A US 1648677A
Authority
US
United States
Prior art keywords
bulb
lamp
electric lamp
decrease
incandescent electric
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
US145914A
Other languages
English (en)
Inventor
Boer Jan Hendrik 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 US1648677A publication Critical patent/US1648677A/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

Definitions

  • This invention relates to electric incandescent lamps and more particularly to vacuum lamps provided with a tungsten filament. 1n the burning of the lamp the tungsten vaporizes and deposits upon the inner walls of the lamp bulb, resulting in a harmful and undesirable absorption of light.
  • getters can be disposed upon the internal.
  • a salt of hydrofluorboric acid is brought into the electric lamp bulb.
  • other fluorides or other getters for instance, boric acid
  • the substances above referred to can be applied in any well known way, for example, by spraying or squirting an alcoholic solution or suspension upon the filament before it is sealed into the bulb, the getter being precipitated or deposited upon the lamp bulb by incandescing the filament after the bulb has been sealed.
  • the decrease in amount of current is the consequence of the vaporization of the tungsten whereby the wire is attenuated.
  • the decrease in candle-power or luminosity on the other hand is caused both by the effect of decrease in current strength, and by the abing a potassium borofluoride getter; in other words, in the presence of equal decrease in current strength and therefore of equal quantities of vaporized tungsten, the corresponding decrease in candle-power is greater when calcium fluoride is used than when potassium borofluoride is employed.
  • An incandescent electric lamp comprising a tungsten filament and a sealed bulb having a salt of hydrofluorboric acid distributed in it to hinder absorption of the light by vaporized tungsten.
  • An incandescent electric lamp comprising a sealed bulb, a tungsten filament in said bulb, and potassium borofluoride distributed on the inner Wall of said bulb to hinder abing a tungsten filament and a sealed bulb sorption of the light during operation of the containing a getter material comprising a 10 lamp. salt of hydrofluorboric acid positioned in 3.
  • An incandescent lamp comprising a said bulb to be activated and act as a getter sealed bulb, a tungsten filament in said bulb, when said lamp is lighted.
  • An incandescent electric lamp compris- JAN HENDRIK DEBOER.

Landscapes

  • Luminescent Compositions (AREA)
  • Discharge Lamp (AREA)
US145914A 1925-12-12 1926-11-02 Incandescent electric lamp Expired - Lifetime US1648677A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1648677X 1925-12-12

Publications (1)

Publication Number Publication Date
US1648677A true US1648677A (en) 1927-11-08

Family

ID=19872914

Family Applications (1)

Application Number Title Priority Date Filing Date
US145914A Expired - Lifetime US1648677A (en) 1925-12-12 1926-11-02 Incandescent electric lamp

Country Status (5)

Country Link
US (1) US1648677A (de)
BE (1) BE337091A (de)
DE (1) DE464737C (de)
FR (1) FR623708A (de)
NL (1) NL17743C (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4810221A (en) * 1988-02-09 1989-03-07 Gte Products Corporation Method for gettering incandescent lamps
US4898558A (en) * 1988-02-09 1990-02-06 Gte Products Corporation Getter for incandescent lamps
US4923424A (en) * 1988-02-09 1990-05-08 Gte Products Corporation Incandescent lamps including a combined getter
US4927398A (en) * 1988-02-09 1990-05-22 Gte Products Corporation Incandescent lamps including a combined getter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4810221A (en) * 1988-02-09 1989-03-07 Gte Products Corporation Method for gettering incandescent lamps
US4898558A (en) * 1988-02-09 1990-02-06 Gte Products Corporation Getter for incandescent lamps
US4923424A (en) * 1988-02-09 1990-05-08 Gte Products Corporation Incandescent lamps including a combined getter
US4927398A (en) * 1988-02-09 1990-05-22 Gte Products Corporation Incandescent lamps including a combined getter

Also Published As

Publication number Publication date
BE337091A (de)
DE464737C (de) 1928-08-24
FR623708A (fr) 1927-06-29
NL17743C (de)

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