FR640485A - folding screen for projections - Google Patents

folding screen for projections

Info

Publication number
FR640485A
FR640485A FR640485DA FR640485A FR 640485 A FR640485 A FR 640485A FR 640485D A FR640485D A FR 640485DA FR 640485 A FR640485 A FR 640485A
Authority
FR
France
Prior art keywords
projections
folding screen
folding
screen
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
Georges Benoit-Dessoudeix
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 FR640485A publication Critical patent/FR640485A/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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/58—Projection screens collapsible, e.g. foldable; of variable area

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR640485D 1927-02-14 1927-02-14 folding screen for projections Expired FR640485A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR640485T 1927-02-14

Publications (1)

Publication Number Publication Date
FR640485A true FR640485A (en) 1928-07-13

Family

ID=8997494

Family Applications (1)

Application Number Title Priority Date Filing Date
FR640485D Expired FR640485A (en) 1927-02-14 1927-02-14 folding screen for projections

Country Status (1)

Country Link
FR (1) FR640485A (en)

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