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FR547814A - Improvements to cinematographic projection devices - Google Patents

Improvements to cinematographic projection devices

Info

Publication number
FR547814A
FR547814A FR547814DA FR547814A FR 547814 A FR547814 A FR 547814A FR 547814D A FR547814D A FR 547814DA FR 547814 A FR547814 A FR 547814A
Authority
FR
France
Prior art keywords
projection devices
cinematographic projection
cinematographic
devices
projection
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
Frederick William Woodward
Arthur Robertson Buttery
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 FR547814A publication Critical patent/FR547814A/en
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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR547814D 1921-03-03 1922-02-24 Improvements to cinematographic projection devices Expired FR547814A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB547814X 1921-03-03

Publications (1)

Publication Number Publication Date
FR547814A true FR547814A (en) 1922-12-26

Family

ID=10472062

Family Applications (1)

Application Number Title Priority Date Filing Date
FR547814D Expired FR547814A (en) 1921-03-03 1922-02-24 Improvements to cinematographic projection devices

Country Status (1)

Country Link
FR (1) FR547814A (en)

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