FR750979A - Projection device - Google Patents

Projection device

Info

Publication number
FR750979A
FR750979A FR750979DA FR750979A FR 750979 A FR750979 A FR 750979A FR 750979D A FR750979D A FR 750979DA FR 750979 A FR750979 A FR 750979A
Authority
FR
France
Prior art keywords
projection device
projection
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
Jean Casanova
Christian Virey
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 FR750979A publication Critical patent/FR750979A/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
    • G03B21/18—Fire preventing or extinguishing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR750979D 1932-05-20 1932-05-20 Projection device Expired FR750979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR750979T 1932-05-20

Publications (1)

Publication Number Publication Date
FR750979A true FR750979A (en) 1933-08-24

Family

ID=9153242

Family Applications (1)

Application Number Title Priority Date Filing Date
FR750979D Expired FR750979A (en) 1932-05-20 1932-05-20 Projection device

Country Status (1)

Country Link
FR (1) FR750979A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818771A (en) * 1954-05-17 1958-01-07 American Optical Corp Projectors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2818771A (en) * 1954-05-17 1958-01-07 American Optical Corp Projectors

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