GB351216A - Process for the production of filaments and other bodies from rhenium - Google Patents

Process for the production of filaments and other bodies from rhenium

Info

Publication number
GB351216A
GB351216A GB1729730A GB1729730A GB351216A GB 351216 A GB351216 A GB 351216A GB 1729730 A GB1729730 A GB 1729730A GB 1729730 A GB1729730 A GB 1729730A GB 351216 A GB351216 A GB 351216A
Authority
GB
United Kingdom
Prior art keywords
rhenium
pump
compounds
bodies
electric current
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
GB1729730A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Priority to GB1729730A priority Critical patent/GB351216A/en
Publication of GB351216A publication Critical patent/GB351216A/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
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

Coatings of rhenium are produced by heating a metal body in an atmosphere containing vapours of compounds of rhenium and a halogen. Chlorine may be passed over heated rhenium to form rhenium heptachloride and hexachloride which are carried into a bulb containing a tungsten filament heated by electric current to 1000-1600 DEG C. The pressure is kept low, and excess chlorine removed, by a pump, rhenium compounds passing towards the pump being trapped in a cooled receptacle. Rhenium chlorides may be introduced as solids and vaporized by heat. Reference has been directed by the Comptroller to Specification 309,536, [Class 39 (i), Electric lamps, Arc &c.].ALSO:Filaments and other bodies, and particularly incandescent bodies for arc and incandescent lamps and vacuum tubes, are coated with rhenium by heating a metal body such as a tungsten or platinum filament, by the passage of electric current, in an atmosphere containing vapours of compounds of rhenium and a halogen. Chlorine may be passed over heated rhenium to form rhenium heptachloride and hexachloride which are carried into a bulb containing a tungsten filament heated by electric current to 1000-1600 DEG C. The pressure is kept low, and excess chlorine removed, by a pump, rhenium compounds passing towards the pump being trapped in a cooled receptacle. A thick rhenium coating is produced on the filament, its diameter increasing from ,02 to ,2 mm. Rhenium chlorides may be introduced as solids and vaporized by heat. Reference has been directed by the Comptroller to Specification 309,536, [Class 39 (i), Electric lamps, &c.].
GB1729730A 1930-06-04 1930-06-04 Process for the production of filaments and other bodies from rhenium Expired GB351216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1729730A GB351216A (en) 1930-06-04 1930-06-04 Process for the production of filaments and other bodies from rhenium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1729730A GB351216A (en) 1930-06-04 1930-06-04 Process for the production of filaments and other bodies from rhenium

Publications (1)

Publication Number Publication Date
GB351216A true GB351216A (en) 1931-06-25

Family

ID=10092702

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1729730A Expired GB351216A (en) 1930-06-04 1930-06-04 Process for the production of filaments and other bodies from rhenium

Country Status (1)

Country Link
GB (1) GB351216A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2858207A (en) * 1954-12-24 1958-10-28 Charles Bertolus Ets Thermionic cathode cores composed of nickel-rhenium alloy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2858207A (en) * 1954-12-24 1958-10-28 Charles Bertolus Ets Thermionic cathode cores composed of nickel-rhenium alloy

Similar Documents

Publication Publication Date Title
US1830598A (en) Method and apparatus for coloring lamps
US2026086A (en) Blue coated ceramic article and method and means for producing it
GB351216A (en) Process for the production of filaments and other bodies from rhenium
US2030440A (en) Manufacture of fabricated glass articles
Reimann Thermionic emission from carbon
US2238472A (en) Light-diffusing body and method of producing same
US2710270A (en) Coated filaments and their production
US2267343A (en) Electric discharge lamp
US1422443A (en) Leading-in wires for incandescent electric lamps
GB453972A (en) Improvements in and relating to processes for the treatment of the filaments of incandescent electric lamps
US1205002A (en) Process of exhausting lamps.
US3352703A (en) Method for producing light-diffusing coatings of titania on glass
US2413442A (en) Electrode activation
US1086171A (en) Process of treating incandescent-lamp filaments.
US2055181A (en) Photoelectric tube
DE527105C (en) Process for the production of metal coatings on glow threads and other bodies
SU49092A1 (en) Device for applying a protective layer to the glass envelope of gas luminaires
GB439243A (en) An improved method of evacuating vessels, more particularly lamp bulbs
GB821465A (en) Improved electric incandescent lamps
US1280704A (en) Treatment of tungsten filaments.
US563329A (en) Process of building up carbon filaments
US1317492A (en) Htjrger
GB256975A (en) Process of making vacuum tubes
US289456A (en) sheehy
GB190009464A (en) Improvements in the Manufacture of Filaments for Incandescent Electric Lights.