US2099874A - Method of evacuating vessels, more particularly lamps - Google Patents

Method of evacuating vessels, more particularly lamps Download PDF

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Publication number
US2099874A
US2099874A US729908A US72990834A US2099874A US 2099874 A US2099874 A US 2099874A US 729908 A US729908 A US 729908A US 72990834 A US72990834 A US 72990834A US 2099874 A US2099874 A US 2099874A
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US
United States
Prior art keywords
vessel
evacuating
carbonyl
vessels
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
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US729908A
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English (en)
Inventor
Trenzen Carl
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Individual
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Individual
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Publication date
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Publication of US2099874A publication Critical patent/US2099874A/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
    • H01K3/22—Exhausting, degassing, filling, or cleaning vessels

Definitions

  • This invention relates to a method of evacuating vessels, and more particularly the bulbs of lamps
  • the evacuation requires to be extended as far as possible in order to obtain a poor transmission of the heat tothe outer wall of the vessel. Together with the air it is also necessary to expel every trace of steam, as the latter will exert a very destructive efi'ect on the lamp. Despite the care taken it has not been possible up to now to eliminate every trace of v residual gas with the ordinary mechanical means available.
  • getter process consisting in the introduction of means which evaporate when the lamp is switched on and bind chemically with 0 the residual traces of gas (Malignani process).
  • getter process there are employed special phosphorous compounds.
  • a metal carbonyl which is introduced into the partially evacuated vessel or bulb. If the vessel is afterwards heated the carbonyl becomes decomposed. CO is liberated, and this CO, which in contradistinction to 5 ordinary very inert CO is an extremely active gas,
  • the gases still present in the'filament are also bound, so that the filament may be subjected to a higher load without eilect on its durability.
  • the evacuation is afterwards continued.
  • the metal may be allowed to remain in the gaseous form dependent on the temperature employed,
  • the gases remain in bound form in the lamp, and may always exert a detrimental effect on the life of the lamp, the same in the case of the invention are expelled from the lamp.
  • the metallic reflector remaining in the'bulb nevertheless also acts as getter, since owing to its fine distribution it is able to absorb and render harmless the, traces of injurious gas emerging later from the filament or the edge of the glass.
  • the metallic reflector By suitably heating the bulb it is also possibleto apply the metallic reflector to points where the same is useful, 1. e., may be utilized for reflecting the light in a certain direction.
  • a method of evacuating vessels, and more particularly lamp bulbs which consists in partially evacuating the vessel, then introducin nickel carbonyl into the said vessel, heating the said vessel to cause decomposition .of the said nickel carbonyl, so that the air and traces of gas combine with the liberated CO, and then completing the evacuation of the said-vesel.
  • a method of evacuating vessels, and more particularly lamp bulbs which consists in partially evacuating the vessel, then introducing molybdenum carbonyl into the said'vessel, heating the said vessel to cause decomposition of the said molybdenum carbonyl, so that the air and traces of gas combine with the liberated C0, and then completing the evacuation of the said vessel.
  • a method of evacuating vessels, and more particularly lamp bulbs which consists in partially evacuating the vessel, then introducing ferrocarbonyl into the said vessel, heating the said vessel to cause decomposition of the said ferrocarbonyl, so that the air and traces of gas combine with the liberated CO, and then completing the evacuation of the said vessel.
  • a method of evacuating vessels, and more particularly lamp bulbs which consists in partially evacuating the vessel, then introducing a carbonyl of a metal of the group consisting of nickel, molybdenum, iron, tungsten, into the said vessel, heating the said vessel to cause decomposition of the said carbonyl, so that the air and traces of gas combine with the liberated CO, and then completing the evacuation of the said vessel.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Discharge Lamp (AREA)
US729908A 1933-12-04 1934-06-09 Method of evacuating vessels, more particularly lamps Expired - Lifetime US2099874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH439243X 1933-12-04

Publications (1)

Publication Number Publication Date
US2099874A true US2099874A (en) 1937-11-23

Family

ID=4515141

Family Applications (1)

Application Number Title Priority Date Filing Date
US729908A Expired - Lifetime US2099874A (en) 1933-12-04 1934-06-09 Method of evacuating vessels, more particularly lamps

Country Status (5)

Country Link
US (1) US2099874A (en))
BE (1) BE406626A (en))
DE (1) DE632578C (en))
GB (1) GB439243A (en))
NL (1) NL40433C (en))

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2698810A (en) * 1950-08-25 1955-01-04 Nat Res Corp Coating process
US2742691A (en) * 1950-04-18 1956-04-24 Ohio Commw Eng Co Method of making corrosion resistant clad steel
US3108014A (en) * 1961-03-13 1963-10-22 Alloyd Corp Paper metallizing process utilizing iron dodecacarbonyl
US3189395A (en) * 1961-08-29 1965-06-15 Tung Sol Electric Inc Method of making an incandescent lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2742691A (en) * 1950-04-18 1956-04-24 Ohio Commw Eng Co Method of making corrosion resistant clad steel
US2698810A (en) * 1950-08-25 1955-01-04 Nat Res Corp Coating process
US3108014A (en) * 1961-03-13 1963-10-22 Alloyd Corp Paper metallizing process utilizing iron dodecacarbonyl
US3189395A (en) * 1961-08-29 1965-06-15 Tung Sol Electric Inc Method of making an incandescent lamp

Also Published As

Publication number Publication date
GB439243A (en) 1935-11-28
NL40433C (en))
DE632578C (de) 1936-07-10
BE406626A (en))

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