FR645029A - Filament improvements for incandescent lamps and similar apparatus - Google Patents

Filament improvements for incandescent lamps and similar apparatus

Info

Publication number
FR645029A
FR645029A FR645029DA FR645029A FR 645029 A FR645029 A FR 645029A FR 645029D A FR645029D A FR 645029DA FR 645029 A FR645029 A FR 645029A
Authority
FR
France
Prior art keywords
filament
incandescent lamps
similar apparatus
similar
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
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.)
Compagnie des Lampes
Original Assignee
Compagnie des Lampes
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 Compagnie des Lampes filed Critical Compagnie des Lampes
Application granted granted Critical
Publication of FR645029A publication Critical patent/FR645029A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape
FR645029D 1926-12-04 1927-12-01 Filament improvements for incandescent lamps and similar apparatus Expired FR645029A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US152699A US1632769A (en) 1926-12-04 1926-12-04 Filament for incandescent lamps or similar articles

Publications (1)

Publication Number Publication Date
FR645029A true FR645029A (en) 1928-10-18

Family

ID=22544030

Family Applications (1)

Application Number Title Priority Date Filing Date
FR645029D Expired FR645029A (en) 1926-12-04 1927-12-01 Filament improvements for incandescent lamps and similar apparatus

Country Status (4)

Country Link
US (1) US1632769A (en)
BE (1) BE346958A (en)
DE (1) DE464733C (en)
FR (1) FR645029A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633552A (en) * 1951-06-04 1953-03-31 Westinghouse Electric Corp Lamp, filament therefor and method
US6690103B1 (en) 1999-07-21 2004-02-10 Alan K. Uke Incandescent light bulb with variable pitch coiled filament
AU2001261852A1 (en) * 2000-05-23 2001-12-03 Illumination Technology Inc. Low voltage incandescent lamp with variable pitch filament
US7352846B2 (en) 2005-10-21 2008-04-01 Rigaku Corporation Filament for X-ray tube and X-ray tube having the same
DE102006020580A1 (en) * 2006-05-03 2007-11-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Halogen bulb with carbide-containing filament
US8581492B2 (en) * 2010-10-20 2013-11-12 General Electric Company Electric incandescent lamp for vehicle headlights with new filament geometry

Also Published As

Publication number Publication date
DE464733C (en) 1928-08-25
BE346958A (en)
US1632769A (en) 1927-06-14

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