GB325534A - Improved method for introducing alkaline earth or rare earth metal vapours into evacuated or partially evacuated vessels - Google Patents

Improved method for introducing alkaline earth or rare earth metal vapours into evacuated or partially evacuated vessels

Info

Publication number
GB325534A
GB325534A GB3364228A GB3364228A GB325534A GB 325534 A GB325534 A GB 325534A GB 3364228 A GB3364228 A GB 3364228A GB 3364228 A GB3364228 A GB 3364228A GB 325534 A GB325534 A GB 325534A
Authority
GB
United Kingdom
Prior art keywords
evacuated
improved method
alumina
mixture
paraffin wax
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
Application number
GB3364228A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3364228A priority Critical patent/GB325534A/en
Publication of GB325534A publication Critical patent/GB325534A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H01J9/395—Filling vessels

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

325,534. Standard Telephones &. Cables, Ltd., and Bedford, L. H. Nov.- 16,1928. Vacuum tubes.-An alumino-thermic reaction product containing a pure. alkaline-earth or rareearth metal and alumina is introduced into an evacuated or partially evacuated container such as an electric discharge device and the metal subsequently vaporized. The product may be protected against oxidation or hydration by means of a saturated hydrocarbon or any coating which is removed by heating in vacuo. In one example 500 grams of a mixture of barium monoxide, barium peroxide, and aluminium powder (proportions given) are placed in an iron pot and ignited by means of a magnesium ribbon in conjunction with a fuse powder which may be a mixture of barium peroxide and aluminium. The pot may subsequently be filled with alumina.. The cooled product may be broken out and stood under paraffin wax, and, when required for use, may be ground with paraffin wax and applied as a paste to a recess in a valve plate &c. and secured therein by a cover plate.
GB3364228A 1928-11-16 1928-11-16 Improved method for introducing alkaline earth or rare earth metal vapours into evacuated or partially evacuated vessels Expired GB325534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3364228A GB325534A (en) 1928-11-16 1928-11-16 Improved method for introducing alkaline earth or rare earth metal vapours into evacuated or partially evacuated vessels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3364228A GB325534A (en) 1928-11-16 1928-11-16 Improved method for introducing alkaline earth or rare earth metal vapours into evacuated or partially evacuated vessels

Publications (1)

Publication Number Publication Date
GB325534A true GB325534A (en) 1930-02-17

Family

ID=10355552

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3364228A Expired GB325534A (en) 1928-11-16 1928-11-16 Improved method for introducing alkaline earth or rare earth metal vapours into evacuated or partially evacuated vessels

Country Status (1)

Country Link
GB (1) GB325534A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1153453B (en) * 1961-06-02 1963-08-29 Patra Patent Treuhand High pressure discharge lamp with metal halide vapor and high luminous efficiency
DE1177248B (en) * 1962-08-22 1964-09-03 Patra Patent Treuhand Electric high pressure vapor discharge lamp with a color-correcting additional filling

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1153453B (en) * 1961-06-02 1963-08-29 Patra Patent Treuhand High pressure discharge lamp with metal halide vapor and high luminous efficiency
DE1177248B (en) * 1962-08-22 1964-09-03 Patra Patent Treuhand Electric high pressure vapor discharge lamp with a color-correcting additional filling

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