FR823681A - Improvement in light projections - Google Patents

Improvement in light projections

Info

Publication number
FR823681A
FR823681A FR823681DA FR823681A FR 823681 A FR823681 A FR 823681A FR 823681D A FR823681D A FR 823681DA FR 823681 A FR823681 A FR 823681A
Authority
FR
France
Prior art keywords
improvement
light projections
projections
light
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
Andre Raymond
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 FR823681A publication Critical patent/FR823681A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B31/00—Electric arc lamps
    • H05B31/0018—Electric arc lamps in a closed vessel
    • H05B31/0021—Construction, in particular closure, of the vessel
FR823681D 1936-11-27 1937-06-29 Improvement in light projections Expired FR823681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU823681X 1936-11-27

Publications (1)

Publication Number Publication Date
FR823681A true FR823681A (en) 1938-01-25

Family

ID=19733829

Family Applications (1)

Application Number Title Priority Date Filing Date
FR823681D Expired FR823681A (en) 1936-11-27 1937-06-29 Improvement in light projections

Country Status (1)

Country Link
FR (1) FR823681A (en)

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