FR572200A - Perfectionnements aux cinématographes - Google Patents

Perfectionnements aux cinématographes

Info

Publication number
FR572200A
FR572200A FR572200DA FR572200A FR 572200 A FR572200 A FR 572200A FR 572200D A FR572200D A FR 572200DA FR 572200 A FR572200 A FR 572200A
Authority
FR
France
Prior art keywords
cinematographs
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
George Hall
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 FR572200A publication Critical patent/FR572200A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/18—Fire preventing or extinguishing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR572200D 1922-10-28 1923-10-24 Perfectionnements aux cinématographes Expired FR572200A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB572200X 1922-10-28

Publications (1)

Publication Number Publication Date
FR572200A true FR572200A (fr) 1924-06-02

Family

ID=10478659

Family Applications (1)

Application Number Title Priority Date Filing Date
FR572200D Expired FR572200A (fr) 1922-10-28 1923-10-24 Perfectionnements aux cinématographes

Country Status (1)

Country Link
FR (1) FR572200A (fr)

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