US1694265A - Method and apparatus for treating filaments - Google Patents

Method and apparatus for treating filaments Download PDF

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Publication number
US1694265A
US1694265A US107883A US10788326A US1694265A US 1694265 A US1694265 A US 1694265A US 107883 A US107883 A US 107883A US 10788326 A US10788326 A US 10788326A US 1694265 A US1694265 A US 1694265A
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US
United States
Prior art keywords
getter
filaments
coils
air
solution
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
US107883A
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English (en)
Inventor
George E Inman
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 BE342050D priority Critical patent/BE342050A/xx
Priority to BE342791D priority patent/BE342791A/fr
Application filed by General Electric Co filed Critical General Electric Co
Priority to US107883A priority patent/US1694265A/en
Priority to GB12078/27A priority patent/GB270733A/en
Application granted granted Critical
Publication of US1694265A publication Critical patent/US1694265A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/22—Wire and cord miscellaneous

Definitions

  • G. E. INMAN METHOD AND APPARATUS FOR TREATING FILAMENTS Filed may 1o, 192e Zd' I f 55035.15* .Ei INA/IAN,
  • My invention relates to methods and apparatus for applying coatings to very fine wires, and more specifically to methods and apparatus for applying so-called getters to coiled filaments for incandescent lamps and similar devices.
  • Getters are chemicals which' are introduced into incandescent lamps or similar devices for the purpose of improving the performance of the lamp as by improving the vacuum in the case of vacuum devices or' by combining with met-allic vapors and preventing injurious discoloration of the bulb.
  • Fig. 1 is a perspective of I an apparatus embodying my invention
  • Fig. 2 is an elevation partia ly in section of the tube for the getter solution
  • Fig. 3 is an en-- larged plan view of the ilament container
  • Fig. 4 is an enlarged view of a coiled filament.
  • the filament coil container 10 ordinarily of glass is in the form of a cylinder open at one end and adapted to contain a quantity of filament coils 11. The other end is closed except for the two tubulures 12 and 13.
  • the container l0 is supported in an inclinedfposition, preferably about and is held by a strap 14 on a slide 15 whichengages the parallel-A guides 16 and 17 on a supporting block 18 carried by a base 19.
  • the getter solution is carried in a tube 22 which may be graduated.
  • the lower end of the tube carries a metal end piece 23 which has an outlet nozzle 24.
  • a needle valve 25 preferably of brass projects through said nozzle and at its upper end has a head 26 projecting above the metal upper end piece 26 of the tube.
  • An adjustable cap 27 bears against the said needle holder and the opening of the nozzle 24 may be regulated by means of this cap as the said needle head is provided with an extension 27 surrounded by the spring 27" which serves to'keep the top of the holder aga-inst the said cap 27.
  • the etter solutlonl may be supplied through tunnel 28 preferably of brass communicated 'with the inlet pipe 29. The rate of flow of the getter solution may be regulated by adjusting needle 25 through the cap 27.
  • the getter tube 1s supported by the brackets 30 and 31 and carried by a standard 32. lhe
  • air jets 20 ⁇ and 21 and the air supply pipe connected-thereto are supported by a bracket 33 adjustably mounted on a block 34 which is adjustably supported on an extension from the bracket 31.
  • the jet 21 and the corresponding tubulure 13 are disposed tangentially of the cylinder 10.
  • the air issuing from the jet 2l serves therefore to whirl the coils rapidly around the bottom of the container.
  • the air issuing from the jet 20 encounters the getter solution issuing from the nozzle 24 and directs it into the tubulure 'nsk 12 to be sprayed upon'the whirling coils.
  • receptacle 35 is provided toreceive any excess of the getter solution which may flow from tubulure 13.
  • the mounting of container 10 is preferably such that tubulure 13 is substantially horizontal and this prevents accumulation of liquid in the container.
  • a ventilator 36 is provided with a suitable exhaust connection to take off the dust and vapors while the apparatus is in operation.
  • the air pressure for the jets 20 and 21 is preferably high. About thirtyfive pounds has been foundv to be suitable.. In adjusting the needle 25, the point should be opposite the center of the tubulure 12.
  • the getter material for instance powdered cryolite, is in suspension in a volatile carrier.
  • One solution which has been used was made by adding 200 grams of the powdered getter material to '150 grams of lacquer containing amyl acetate and then diluting by adding four parts of a mixture of 80% methyl alcohol and 20% ether. The presence of the combination of a quick drying carrier such as the alcohol and ether mixture with a relatively slow drier such as the amyl acetate is desirable.
  • the getter flows at the rate of two lor three cubic centimeters per minute while .4 of a cubic centimeter of mixture is usually required for a gram of twenty-live watt coils, and about .7 of a cubic centimeter for a gram of fty watt coils to give the correct ercentage.
  • the adjusting cap can be slightly turned to keep the flow constant.
  • the getter ⁇ needle is shut down. Then the air is closed off and the coils areremoved and weighed. If the wei ht is too high, the coils are returned to t e gettering vessel and the air is turned on to rotate the coils for a few seconds. This rubs off some of the getter. If the percentage is too low, more getter may be sprayed on without removing the previous coating. Y
  • the method of applying getter to fila- ⁇ ments for electric incandescent lamps and similar articles which consists in placing a number of said filaments in a receptacle so that they are supported on the bottom thereof, and then spraying the getter material upon said filaments and at the same time directing gas pressure tangentially so as to cause a swirling of said filaments in front of the spray.
  • a receptacle for holding a number of filaments and having a plurality of openings in its wall near the bottom thereof, a gas pressure jet disposed at each of said openings at least one of which is directed tangentially of the receptale, and means for feeding a liquid contalning said material so as to be en countered by the gas issuing from'at least responding opening.

Landscapes

  • Discharge Lamp (AREA)
  • Gas Separation By Absorption (AREA)
US107883A 1926-05-10 1926-05-10 Method and apparatus for treating filaments Expired - Lifetime US1694265A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE342050D BE342050A (fr) 1926-05-10
BE342791D BE342791A (fr) 1926-05-10
US107883A US1694265A (en) 1926-05-10 1926-05-10 Method and apparatus for treating filaments
GB12078/27A GB270733A (en) 1926-05-10 1927-05-05 Improvements in and relating to methods of and apparatus for treating filaments for electric incandescent lamps or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US107883A US1694265A (en) 1926-05-10 1926-05-10 Method and apparatus for treating filaments

Publications (1)

Publication Number Publication Date
US1694265A true US1694265A (en) 1928-12-04

Family

ID=22318967

Family Applications (1)

Application Number Title Priority Date Filing Date
US107883A Expired - Lifetime US1694265A (en) 1926-05-10 1926-05-10 Method and apparatus for treating filaments

Country Status (3)

Country Link
US (1) US1694265A (fr)
BE (1) BE342050A (fr)
GB (1) GB270733A (fr)

Also Published As

Publication number Publication date
BE342050A (fr)
GB270733A (en) 1927-07-21

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