FR676367A - Three-filament electric lamp - Google Patents

Three-filament electric lamp

Info

Publication number
FR676367A
FR676367A FR676367DA FR676367A FR 676367 A FR676367 A FR 676367A FR 676367D A FR676367D A FR 676367DA FR 676367 A FR676367 A FR 676367A
Authority
FR
France
Prior art keywords
electric lamp
filament electric
filament
lamp
electric
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.)
General Motors Research Corp
Original Assignee
General Motors Research Corp
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 General Motors Research Corp filed Critical General Motors Research Corp
Application granted granted Critical
Publication of FR676367A publication Critical patent/FR676367A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
FR676367D 1928-09-01 1929-06-07 Three-filament electric lamp Expired FR676367A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US303443A US1859661A (en) 1928-09-01 1928-09-01 Three filament bulb

Publications (1)

Publication Number Publication Date
FR676367A true FR676367A (en) 1930-02-21

Family

ID=23172104

Family Applications (1)

Application Number Title Priority Date Filing Date
FR676367D Expired FR676367A (en) 1928-09-01 1929-06-07 Three-filament electric lamp

Country Status (4)

Country Link
US (1) US1859661A (en)
DE (1) DE543588C (en)
FR (1) FR676367A (en)
GB (1) GB318228A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162625B (en) * 1984-07-31 1988-01-27 Stanley Electric Co Ltd Headlamp for vehicle
US9642227B2 (en) 2010-06-18 2017-05-02 Thomas & Betts International Llc Extending service life of lighting fixtures

Also Published As

Publication number Publication date
DE543588C (en) 1932-02-06
US1859661A (en) 1932-05-24
GB318228A (en) 1930-08-21

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