FR672977A - Incandescent electric lamp - Google Patents

Incandescent electric lamp

Info

Publication number: FR672977A
Authority: FR; France
Prior art keywords: electric lamp; incandescent electric; incandescent; lamp; electric
Prior art date: 1929-04-11
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

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.)

FR DES LAMPES A INCANDESCENCE

Original Assignee

FR DES LAMPES A INCANDESCENCE

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.)

1929-04-11

Filing date

1929-04-11

Publication date

1930-01-09

1929-04-11 Application filed by FR DES LAMPES A INCANDESCENCE filed Critical FR DES LAMPES A INCANDESCENCE

1930-01-09 Application granted granted Critical

1930-01-09 Publication of FR672977A publication Critical patent/FR672977A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/02—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies
- H01K9/06—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies with built-in device, e.g. switch, for automatically completing circuit of reserve body

FR672977D 1929-04-11 1929-04-11 Incandescent electric lamp Expired FR672977A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR672977T		1929-04-11

Publications (1)

Publication Number	Publication Date
FR672977A true FR672977A (en)	1930-01-09

Family

ID=9017808

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR672977D Expired FR672977A (en)	1929-04-11	1929-04-11	Incandescent electric lamp

Country Status (1)

Country	Link
FR (1)	FR672977A (en)

1929
- 1929-04-11 FR FR672977D patent/FR672977A/en not_active Expired

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