FR643540A - Perfectionnements aux projecteurs - Google Patents

Perfectionnements aux projecteurs

Info

Publication number
FR643540A
FR643540A FR643540DA FR643540A FR 643540 A FR643540 A FR 643540A FR 643540D A FR643540D A FR 643540DA FR 643540 A FR643540 A FR 643540A
Authority
FR
France
Prior art keywords
refinements
projector
projector refinements
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
English (en)
Inventor
Pierre-Jacques-Jean Abgrall
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 FR643540A publication Critical patent/FR643540A/fr
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios
FR643540D 1927-04-08 1927-04-08 Perfectionnements aux projecteurs Expired FR643540A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR643540T 1927-04-08

Publications (1)

Publication Number Publication Date
FR643540A true FR643540A (fr) 1928-09-18

Family

ID=8999504

Family Applications (1)

Application Number Title Priority Date Filing Date
FR643540D Expired FR643540A (fr) 1927-04-08 1927-04-08 Perfectionnements aux projecteurs

Country Status (1)

Country Link
FR (1) FR643540A (fr)

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