US1610077A - Electric lamp - Google Patents

Electric lamp Download PDF

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Publication number
US1610077A
US1610077A US642840A US64284023A US1610077A US 1610077 A US1610077 A US 1610077A US 642840 A US642840 A US 642840A US 64284023 A US64284023 A US 64284023A US 1610077 A US1610077 A US 1610077A
Authority
US
United States
Prior art keywords
electrodes
arc
lamp
mercury
electric 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
US642840A
Other languages
English (en)
Inventor
Jr Philip K Devers
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
Priority to US642840A priority Critical patent/US1610077A/en
Priority to DEP46819D priority patent/DE403449C/de
Priority to FR582308D priority patent/FR582308A/fr
Priority to GB13481/24A priority patent/GB216900A/en
Application granted granted Critical
Publication of US1610077A publication Critical patent/US1610077A/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
    • H01J61/98—Lamps with closely spaced electrodes heated to incandescence by light-emitting discharge, e.g. tungsten arc lamp

Definitions

  • the present invention relates to electric arc lamps and its object is to provide a lamp of high efiieiency which will emit substan tially white light.
  • My invention relates particularly to arc lamps in which theelectrodes are adapted to operate at incandescence in a gas or vapor at substantial pressure.
  • Mercury vapor is one of the most convenient and efiicient media for the operation of an'arc in a lamp of this character as lightis derived at high efliciency from the arc itselfas'well as from the electrode but as the light from a mercury arc is deficient in raysadjacent the red end of the spectrum the combined light from the incandescent electrodes and the are become somewhat yellowishgreen in color when light from the arc. predominates. This condition exists ordinarily when the arc is longer than about one-eighth inch.
  • my invention have provided a lamp in which the high efficiency of the arc is most completely utilized by providing a refractory'body intermediate the electrodes which preferably is' capable of radiating light predominant in color adjacent the red end of the spectrum when heated to incandescence by the arc.
  • the lamp consists of 'an elongated glass receptacle 1, preferably having a bulbous enlargement at its lower end.
  • the portion of these conductors adjacent the electrodes preferably has a reduced diameter to conserve heat at the electrode.
  • the main electrodes consist, in the device illustrated, of cylinders about .125" in diameter and .090" in length. Adjacent the electrodes is a pool 7 of mercury, or an amalgam of alkali metal or other suitable vaporizable material.
  • the bulb also preferably contains an inert gas, as for example, argon, neon, 'nitro'gen, or-the like, or of a suitable mixture thereof, at a pressure of about a third of an atmosphere.
  • an inert gas as for example, argon, neon, 'nitro'gen, or-the like, or of a suitable mixture thereof, at a pressure of about a third of an atmosphere.
  • a wire 8 having a loop dipping into the mercury is connected to the 1923. Serial No.- 642,840.
  • this wire which preferably also consists of tungsten, is heated to incandescence ionized vapor is produced and an arc may be started between the main electrode with greater facility, as described in my prior Patent 1,310,067 of July 15, 1919.
  • a refractory body 10 having about the same size as the elec-' trodes and consisting of a material which preferably selectively radiates light nea'rthe red end of the spectrum. Zirconium oxide,
  • This glower 10' is carried by a stein 11,. consisting of tungsten or other suitable refractory material whichis anchored at the opposite end in an insulating support 12 carried by the conductors 4, 5.
  • the arc becomes highly luminous.
  • the glo'wer 10 also becomes heated by the arc, emitting light and becoming electrically conductive. It may be said to function as a neutral electrode.
  • the heated glower which emits electrons freely does not interfere with the operation of the are, not raise the voltage required 'to maintain a continuous arc of the same total length between tungsten electrodes.
  • a mercury are between tungsten electrodes operating normally. would take about 40 amperes with a potential drop of about 25 volts and would give, a distinctly yellowish green light.
  • Two mercury arcs in series with the described central electrode would operate with substantiall the same terminal electrical 'characterlstics.
  • the combination would emit substantially white light providing the intermediate neutral electrodehad been properly chosen and proportioned.
  • the color characteristic of the lamp is very flexible since by varying the lengths of the arcs and the size of the neutral electrode the color can be.varied over a wide range.
  • An electric lamp comprising electrodes adapted to operate at incandescence, an en-' closing envelope, a gas therein inert with respect to said electrode at incandescence, a body of mercury adjacent said electrodes, means for starting'an are between said electrodes and a body of refractory material located directly in the path of said are intermediate said electrodes, said body having approximately the same size as said electrodes andbeing capable of radiating light at incandescence predominately near the red end of the spectrum.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
US642840A 1923-06-01 1923-06-01 Electric lamp Expired - Lifetime US1610077A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US642840A US1610077A (en) 1923-06-01 1923-06-01 Electric lamp
DEP46819D DE403449C (de) 1923-06-01 1923-09-09 Gasgefuellte Bogenlampe
FR582308D FR582308A (fr) 1923-06-01 1924-06-02 Lampe électrique à arc
GB13481/24A GB216900A (en) 1923-06-01 1924-06-02 Improvements in and relating to electric arc lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US642840A US1610077A (en) 1923-06-01 1923-06-01 Electric lamp

Publications (1)

Publication Number Publication Date
US1610077A true US1610077A (en) 1926-12-07

Family

ID=24578251

Family Applications (1)

Application Number Title Priority Date Filing Date
US642840A Expired - Lifetime US1610077A (en) 1923-06-01 1923-06-01 Electric lamp

Country Status (4)

Country Link
US (1) US1610077A (de)
DE (1) DE403449C (de)
FR (1) FR582308A (de)
GB (1) GB216900A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207953A (en) * 1962-11-07 1965-09-21 Hunter Incandescent ceramic electrical igniter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207953A (en) * 1962-11-07 1965-09-21 Hunter Incandescent ceramic electrical igniter

Also Published As

Publication number Publication date
DE403449C (de) 1924-09-27
GB216900A (en) 1925-03-12
FR582308A (fr) 1924-12-16

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