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FR861549A - Improvements to dual devices intended for the projection of cinematographic images - Google Patents

Improvements to dual devices intended for the projection of cinematographic images

Info

Publication number
FR861549A
FR861549A FR861549DA FR861549A FR 861549 A FR861549 A FR 861549A FR 861549D A FR861549D A FR 861549DA FR 861549 A FR861549 A FR 861549A
Authority
FR
France
Prior art keywords
projection
devices intended
dual devices
cinematographic images
cinematographic
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)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR861549A publication Critical patent/FR861549A/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
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/40—Eliminating or reducing effect of flicker

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR861549D 1938-11-14 1939-11-14 Improvements to dual devices intended for the projection of cinematographic images Expired FR861549A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE861549X 1938-11-14

Publications (1)

Publication Number Publication Date
FR861549A true FR861549A (en) 1941-02-11

Family

ID=6795380

Family Applications (1)

Application Number Title Priority Date Filing Date
FR861549D Expired FR861549A (en) 1938-11-14 1939-11-14 Improvements to dual devices intended for the projection of cinematographic images

Country Status (1)

Country Link
FR (1) FR861549A (en)

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