FR680992A - Safety device for cinematographic projection devices - Google Patents

Safety device for cinematographic projection devices

Info

Publication number
FR680992A
FR680992A FR680992DA FR680992A FR 680992 A FR680992 A FR 680992A FR 680992D A FR680992D A FR 680992DA FR 680992 A FR680992 A FR 680992A
Authority
FR
France
Prior art keywords
safety device
projection devices
cinematographic projection
cinematographic
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
Auguste Bechaz
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 FR680992A publication Critical patent/FR680992A/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)
FR680992D 1929-08-30 1929-08-30 Safety device for cinematographic projection devices Expired FR680992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR680992T 1929-08-30

Publications (1)

Publication Number Publication Date
FR680992A true FR680992A (en) 1930-05-08

Family

ID=9022576

Family Applications (1)

Application Number Title Priority Date Filing Date
FR680992D Expired FR680992A (en) 1929-08-30 1929-08-30 Safety device for cinematographic projection devices

Country Status (1)

Country Link
FR (1) FR680992A (en)

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