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FR693848A - écran de projection pour cinématographes et applications analogues - Google Patents

écran de projection pour cinématographes et applications analogues

Info

Publication number
FR693848A
FR693848A FR693848DA FR693848A FR 693848 A FR693848 A FR 693848A FR 693848D A FR693848D A FR 693848DA FR 693848 A FR693848 A FR 693848A
Authority
FR
France
Prior art keywords
cinematographs
projection screen
similar applications
applications
similar
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
Andrew Smith Harkness
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 FR693848A publication Critical patent/FR693848A/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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/565—Screens allowing free passage of sound
    • 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
    • G03B21/60—Projection screens characterised by the nature of the surface

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR693848D 1929-04-15 1930-04-14 écran de projection pour cinématographes et applications analogues Expired FR693848A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB693848X 1929-04-15

Publications (1)

Publication Number Publication Date
FR693848A true FR693848A (fr) 1930-11-25

Family

ID=10493303

Family Applications (1)

Application Number Title Priority Date Filing Date
FR693848D Expired FR693848A (fr) 1929-04-15 1930-04-14 écran de projection pour cinématographes et applications analogues

Country Status (1)

Country Link
FR (1) FR693848A (fr)

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