US1594057A - Electric incandescent device - Google Patents

Electric incandescent device Download PDF

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Publication number
US1594057A
US1594057A US735074A US73507424A US1594057A US 1594057 A US1594057 A US 1594057A US 735074 A US735074 A US 735074A US 73507424 A US73507424 A US 73507424A US 1594057 A US1594057 A US 1594057A
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US
United States
Prior art keywords
zirconium
filament
lamp
tungsten
compound
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
US735074A
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English (en)
Inventor
Gorton R Fonda
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
Priority to NL18450D priority Critical patent/NL18450C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US735074A priority patent/US1594057A/en
Priority to DEP49367D priority patent/DE429115C/de
Priority to FR602626D priority patent/FR602626A/fr
Priority to GB21495/25A priority patent/GB239221A/en
Application granted granted Critical
Publication of US1594057A publication Critical patent/US1594057A/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
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/02—Manufacture of incandescent bodies
    • 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

  • Genre! a. son, or m, saw 203:, assrouoa 'ro emu. mcrarc comm, a OOBPOBA'I'IOI or new You mt! DEVICE.
  • the present invention relates to devices containing a filament or other body rating at incandescence and in particul; to
  • I electric lamps containing a ttmgsten fila I ment I electric lamps containing a ttmgsten fila I ment.
  • the zirconium as an allo constituent is obtained from a source provi ed in the lamp bulb and the zirconium is introduced into the tungsten body by a diiferent method, namely, the progremivethermal decomposition of the va r of a zirconium com und which comes mto contact with the mcandescent body at low pressure, accompanied by immediate alloyage of the liberated zirconium with the tungsten.
  • This gradual decomposition of the zirconium and the al-; loyage of zirconium is a proces which fishes on d the entire life of the lamp. e advantage of this continuous alloyage will be later explained
  • the accompanying drawing shows in Fig.
  • Fi 1 an incandescent lamp having a hollow stem containing a zirconium compound
  • Fi 2 shows a vacuum lamp containing 1 y a zirconium compound
  • Fig. 3 illustrates a modification in which the zirconium com pound is applied on a filament support.
  • the lamp shown in 1 comprises the usual sealed bulb 1 containing a 1: filament 2, wound in a spiral too :m 1 and close to be here illustrated, in such way as to give the effect of a larger diameter
  • the filament is mounted upon anchor wires 3, 4, which in turn are carried b a glass stem 5.
  • the bulb is exhausted during manufacture through a tube 6, which after exhaust is sealed ofi.
  • the lamp is provided as usual with a base 7, which is cemented in place as indicated at 8.
  • a capsule 9 containin a zirconium compound, preferably the ch oride, ZrCL.
  • This capsule is introdnced through the exhaust tube 6 during the manufacture of the lamp and is held m place by glass wool 10 as illustrated.
  • the amp contains a gas, such as argon or mtrogen at substantial pressure, say at 600 m. m. of mercury to reduce evaporation of the filaa placed looselywithin "b ment in accordance with uir U. S. Patent 1,180,159, issued April 18, 1916.
  • FIG. 1 shows an incandescent lamp of the vacuum type in which a tungsten filament 11 is wound in zig-zag manner over two sets of anchors 12, 13 which'are in turn mounted spaced apart upon-a glass pedestal 14.
  • the filament is mounted in the well known manher in an evacuated'bulb'lti and is electrical- 7 1y connected to theicontacts'of an external screw base 16.
  • theevacuated bulb is provided a of zirconium compound which placed within a receptacle as shown fm?;Fig.
  • zirconium 1 may be ulb as shown at Other ways of locating the zirconium compound may be devised to the benefits of my inventionr-iForexample, as shown in Fig, 3, a smallquantity ofgthe zirconium compolmd together with a suitable binder conium chloride or other halogen compound of zirconium, the material knownas film stock, comprising a compound of cellulose,
  • zirconium compound may be present to the amountof a few milh An excess is allowable as only the vapor of. the compound comes into contact with the filament.
  • zirconium chloride has alow vapor premure it may be placed almost anywhere, either in a'gas filled or in a, vacuum lamp, except in direct contact with the filament.
  • the vapor of the zirconium compound When placed upon some part of the lamp having during operation a temperature not substantially higher than the temperature of. the bulb. the vapor of the zirconium compound will have a pressure not substantially greater than the residual-gas pressure in a first-clas vacuum, that is, a presure of less than a micron of mercury. Due to this'small vapor pressure the zirconium is supplied to the filament continuously in such 'small amounts as to compensate for the zirconium which is lost by evaporation at the operating temperature-of the filament.
  • the zirconium atoms pear to have a function of preventing shp of crystal planes by a-keying action that is the solid solution of tungsten and zirconium is formed in different parts of the er stal' and the difierence in atomic size of t is in the tungsten ap I solid solution serves as a key to prevent dis lacement of crystal planes
  • zirconium compound acts in the nature of a getter to continuously deposit on the filament in small amounts a substance (that is zirconium), which acts beneficially to maintain the filament intact when operating at inoandescence, both by reduc' the vapor pressure and by. counteractin aul 4 ing.
  • suc as gas-fill lam s both functions are of marked benefit.
  • An incandescent lamp comprising a sealed bulb, a tungsten filament therein, and
  • a zirconium compound which is decomposa-- ble atincandesence located in said bulb outside of the immediate vicinity of the filament and having at the temperature prevailing at the region of location a vapor pressure not. greater substantially than the residual ressure in a first-class vacuum.
  • candescent lamp comprising a sealed bulb, a -fi1ament mounted therein, and zircomum chloride positioned insaid bulbtoattainatem 'turea'twhich' the .vapor pressure of sai compound is of the order of: the reddual gas pressure of a first-class vacuum.
  • the method of reducing the volatilizaon of a hmfisten filament in an incandesmt lamp w ich consists in continuously lppl zirconium to said filament while lcan eacent at such rate that the zirconium intent of said filament is maintained no reater than a few per cent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Resistance Heating (AREA)
US735074A 1924-08-30 1924-08-30 Electric incandescent device Expired - Lifetime US1594057A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL18450D NL18450C (enrdf_load_html_response) 1924-08-30
US735074A US1594057A (en) 1924-08-30 1924-08-30 Electric incandescent device
DEP49367D DE429115C (de) 1924-08-30 1924-12-20 Elektrische Gluehlampe
FR602626D FR602626A (fr) 1924-08-30 1925-08-25 Perfectionnements aux appareils électriques à incandescence
GB21495/25A GB239221A (en) 1924-08-30 1925-08-27 Improvements in and relating to electric incandescent devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US735074A US1594057A (en) 1924-08-30 1924-08-30 Electric incandescent device

Publications (1)

Publication Number Publication Date
US1594057A true US1594057A (en) 1926-07-27

Family

ID=24954252

Family Applications (1)

Application Number Title Priority Date Filing Date
US735074A Expired - Lifetime US1594057A (en) 1924-08-30 1924-08-30 Electric incandescent device

Country Status (5)

Country Link
US (1) US1594057A (enrdf_load_html_response)
DE (1) DE429115C (enrdf_load_html_response)
FR (1) FR602626A (enrdf_load_html_response)
GB (1) GB239221A (enrdf_load_html_response)
NL (1) NL18450C (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759602A (en) * 1971-08-30 1973-09-18 Gen Electric Inhibiting d-c notching effect in incandescent lamp filaments

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759602A (en) * 1971-08-30 1973-09-18 Gen Electric Inhibiting d-c notching effect in incandescent lamp filaments

Also Published As

Publication number Publication date
NL18450C (enrdf_load_html_response)
GB239221A (en) 1925-10-22
FR602626A (fr) 1926-03-23
DE429115C (de) 1926-05-20

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