FR578839A - Improvements in the projection process of photographic or cinematographic images - Google Patents

Improvements in the projection process of photographic or cinematographic images

Info

Publication number
FR578839A
FR578839A FR578839DA FR578839A FR 578839 A FR578839 A FR 578839A FR 578839D A FR578839D A FR 578839DA FR 578839 A FR578839 A FR 578839A
Authority
FR
France
Prior art keywords
photographic
projection process
cinematographic images
cinematographic
images
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
Gaston Chelle
Georges Perinal
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 FR578839A publication Critical patent/FR578839A/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
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR578839D 1924-03-18 1924-03-18 Improvements in the projection process of photographic or cinematographic images Expired FR578839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR578839T 1924-03-18

Publications (1)

Publication Number Publication Date
FR578839A true FR578839A (en) 1924-10-04

Family

ID=8955707

Family Applications (1)

Application Number Title Priority Date Filing Date
FR578839D Expired FR578839A (en) 1924-03-18 1924-03-18 Improvements in the projection process of photographic or cinematographic images

Country Status (1)

Country Link
FR (1) FR578839A (en)

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