FR678960A - Automatic safety device for cinematographic or photographic projection apparatus - Google Patents

Automatic safety device for cinematographic or photographic projection apparatus

Info

Publication number
FR678960A
FR678960A FR678960DA FR678960A FR 678960 A FR678960 A FR 678960A FR 678960D A FR678960D A FR 678960DA FR 678960 A FR678960 A FR 678960A
Authority
FR
France
Prior art keywords
cinematographic
safety device
projection apparatus
automatic safety
photographic 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
Andre-Leon-Victor-Cl Debrie
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 FR678960A publication Critical patent/FR678960A/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
    • G03B21/16—Cooling; Preventing overheating

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR678960D 1928-11-20 1928-11-20 Automatic safety device for cinematographic or photographic projection apparatus Expired FR678960A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR678960T 1928-11-20

Publications (1)

Publication Number Publication Date
FR678960A true FR678960A (en) 1930-04-07

Family

ID=9021347

Family Applications (1)

Application Number Title Priority Date Filing Date
FR678960D Expired FR678960A (en) 1928-11-20 1928-11-20 Automatic safety device for cinematographic or photographic projection apparatus

Country Status (1)

Country Link
FR (1) FR678960A (en)

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