FR674271A - Perfectionnements aux projecteurs - Google Patents

Perfectionnements aux projecteurs

Info

Publication number
FR674271A
FR674271A FR674271DA FR674271A FR 674271 A FR674271 A FR 674271A FR 674271D A FR674271D A FR 674271DA FR 674271 A FR674271 A FR 674271A
Authority
FR
France
Prior art keywords
refinements
projector
projector refinements
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
English (en)
Inventor
Pierre Abgrall
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 FR674271A publication Critical patent/FR674271A/fr
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)
FR674271D 1929-04-30 1929-04-30 Perfectionnements aux projecteurs Expired FR674271A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR674271T 1929-04-30

Publications (1)

Publication Number Publication Date
FR674271A true FR674271A (fr) 1930-01-27

Family

ID=9018637

Family Applications (1)

Application Number Title Priority Date Filing Date
FR674271D Expired FR674271A (fr) 1929-04-30 1929-04-30 Perfectionnements aux projecteurs

Country Status (1)

Country Link
FR (1) FR674271A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4755917A (en) * 1986-08-07 1988-07-05 Hella Kg Hueck & Co. Headlight for vehicles, in particular motor vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4755917A (en) * 1986-08-07 1988-07-05 Hella Kg Hueck & Co. Headlight for vehicles, in particular motor vehicles

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