FR677221A - Perfectionnements apportés aux appareils de projection cinématographique - Google Patents

Perfectionnements apportés aux appareils de projection cinématographique

Info

Publication number
FR677221A
FR677221A FR677221DA FR677221A FR 677221 A FR677221 A FR 677221A FR 677221D A FR677221D A FR 677221DA FR 677221 A FR677221 A FR 677221A
Authority
FR
France
Prior art keywords
projection devices
cinematographic projection
cinematographic
devices
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
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.)
Blunt & Mc Cormack Ltd
Original Assignee
Blunt & Mc Cormack Ltd
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 Blunt & Mc Cormack Ltd filed Critical Blunt & Mc Cormack Ltd
Application granted granted Critical
Publication of FR677221A publication Critical patent/FR677221A/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
    • G03B21/18—Fire preventing or extinguishing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR677221D 1928-07-04 1929-06-22 Perfectionnements apportés aux appareils de projection cinématographique Expired FR677221A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB677221X 1928-07-04

Publications (1)

Publication Number Publication Date
FR677221A true FR677221A (fr) 1930-03-05

Family

ID=10492188

Family Applications (1)

Application Number Title Priority Date Filing Date
FR677221D Expired FR677221A (fr) 1928-07-04 1929-06-22 Perfectionnements apportés aux appareils de projection cinématographique

Country Status (1)

Country Link
FR (1) FR677221A (fr)

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