FR493639A - Tungsten filament improvements for incandescent lamps - Google Patents

Tungsten filament improvements for incandescent lamps

Info

Publication number
FR493639A
FR493639A FR493639A FR493639DA FR493639A FR 493639 A FR493639 A FR 493639A FR 493639 A FR493639 A FR 493639A FR 493639D A FR493639D A FR 493639DA FR 493639 A FR493639 A FR 493639A
Authority
FR
France
Prior art keywords
incandescent lamps
tungsten filament
filament
tungsten
incandescent
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
FR493639A
Other languages
French (fr)
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.)
Westinghouse Lamp Co
Original Assignee
Westinghouse Lamp 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
Application filed by Westinghouse Lamp Co filed Critical Westinghouse Lamp Co
Application granted granted Critical
Publication of FR493639A publication Critical patent/FR493639A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Resistance Heating (AREA)
  • Conductive Materials (AREA)
  • Inorganic Fibers (AREA)
  • Glass Compositions (AREA)
FR493639A 1917-12-19 1918-12-07 Tungsten filament improvements for incandescent lamps Expired FR493639A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US207838A US1461118A (en) 1917-12-19 1917-12-19 Filament

Publications (1)

Publication Number Publication Date
FR493639A true FR493639A (en) 1919-08-14

Family

ID=22772183

Family Applications (1)

Application Number Title Priority Date Filing Date
FR493639A Expired FR493639A (en) 1917-12-19 1918-12-07 Tungsten filament improvements for incandescent lamps

Country Status (3)

Country Link
US (1) US1461118A (en)
FR (1) FR493639A (en)
GB (1) GB121596A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2656596A (en) * 1949-05-17 1953-10-27 Union Carbide & Carbon Corp Tungsten-chromium-alumina metal ceramics
US2752665A (en) * 1950-04-21 1956-07-03 Baker & Co Inc Grain stabilized metals and alloys
US2903544A (en) * 1956-04-18 1959-09-08 Heraeus Gmbh W C Coating
NL253509A (en) * 1959-07-08

Also Published As

Publication number Publication date
US1461118A (en) 1923-07-10
GB121596A (en) 1919-11-27

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