FR570440A - Improvements to incandescent electric lamps - Google Patents

Improvements to incandescent electric lamps

Info

Publication number
FR570440A
FR570440A FR570440DA FR570440A FR 570440 A FR570440 A FR 570440A FR 570440D A FR570440D A FR 570440DA FR 570440 A FR570440 A FR 570440A
Authority
FR
France
Prior art keywords
electric lamps
incandescent electric
incandescent
lamps
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)
Inventor
Sidney Leopold Price
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 filed Critical
Application granted granted Critical
Publication of FR570440A publication Critical patent/FR570440A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/26—Screens; Filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
FR570440D 1922-01-17 1923-07-16 Improvements to incandescent electric lamps Expired FR570440A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB150622A GB200850A (en) 1922-01-17 1922-01-17 Improvements in incandescent electric lamps

Publications (1)

Publication Number Publication Date
FR570440A true FR570440A (en) 1924-04-30

Family

ID=9723151

Family Applications (1)

Application Number Title Priority Date Filing Date
FR570440D Expired FR570440A (en) 1922-01-17 1923-07-16 Improvements to incandescent electric lamps

Country Status (2)

Country Link
FR (1) FR570440A (en)
GB (1) GB200850A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454765A (en) * 1944-09-28 1948-11-30 Tung Sol Lamp Works Inc Electric head lamp projector and incandescent lamp therefor

Also Published As

Publication number Publication date
GB200850A (en) 1923-07-17

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