FR997920A - Improvements to projection devices - Google Patents

Improvements to projection devices

Info

Publication number
FR997920A
FR997920A FR997920DA FR997920A FR 997920 A FR997920 A FR 997920A FR 997920D A FR997920D A FR 997920DA FR 997920 A FR997920 A FR 997920A
Authority
FR
France
Prior art keywords
projection devices
projection
devices
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
Louis-Jean Damblanc
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 FR997920A publication Critical patent/FR997920A/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
    • G03B23/00—Devices for changing pictures in viewing apparatus or projectors
    • G03B23/08—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier
    • G03B23/10—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier drum or disc carrier

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR997920D 1945-09-05 1945-09-05 Improvements to projection devices Expired FR997920A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR997920T 1945-09-05

Publications (1)

Publication Number Publication Date
FR997920A true FR997920A (en) 1952-01-11

Family

ID=9559016

Family Applications (1)

Application Number Title Priority Date Filing Date
FR997920D Expired FR997920A (en) 1945-09-05 1945-09-05 Improvements to projection devices

Country Status (1)

Country Link
FR (1) FR997920A (en)

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