FR640306A - Projector lighting improvements - Google Patents

Projector lighting improvements

Info

Publication number
FR640306A
FR640306A FR640306DA FR640306A FR 640306 A FR640306 A FR 640306A FR 640306D A FR640306D A FR 640306DA FR 640306 A FR640306 A FR 640306A
Authority
FR
France
Prior art keywords
projector lighting
projector
lighting
lighting improvements
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
Maurice Couade
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 FR640306A publication Critical patent/FR640306A/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
    • G03B21/20—Lamp housings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR640306D 1927-08-31 1927-08-31 Projector lighting improvements Expired FR640306A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR640306T 1927-08-31

Publications (1)

Publication Number Publication Date
FR640306A true FR640306A (en) 1928-07-10

Family

ID=8997371

Family Applications (1)

Application Number Title Priority Date Filing Date
FR640306D Expired FR640306A (en) 1927-08-31 1927-08-31 Projector lighting improvements

Country Status (1)

Country Link
FR (1) FR640306A (en)

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