FR977703A - Perfectionnement aux appareils de projection - Google Patents

Perfectionnement aux appareils de projection

Info

Publication number
FR977703A
FR977703A FR977703DA FR977703A FR 977703 A FR977703 A FR 977703A FR 977703D A FR977703D A FR 977703DA FR 977703 A FR977703 A FR 977703A
Authority
FR
France
Prior art keywords
improvement
projection devices
projection
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
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pathe Cinema SA
Original Assignee
Pathe Cinema SA
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 by Pathe Cinema SA filed Critical Pathe Cinema SA
Application granted granted Critical
Publication of FR977703A publication Critical patent/FR977703A/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)
FR977703D 1942-10-15 1942-10-15 Perfectionnement aux appareils de projection Expired FR977703A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR977703T 1942-10-15

Publications (1)

Publication Number Publication Date
FR977703A true FR977703A (fr) 1951-04-04

Family

ID=9519951

Family Applications (1)

Application Number Title Priority Date Filing Date
FR977703D Expired FR977703A (fr) 1942-10-15 1942-10-15 Perfectionnement aux appareils de projection

Country Status (1)

Country Link
FR (1) FR977703A (fr)

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