FR677220A - Improvements to the lantern bodies for cinematographic projection devices and others - Google Patents

Improvements to the lantern bodies for cinematographic projection devices and others

Info

Publication number
FR677220A
FR677220A FR677220DA FR677220A FR 677220 A FR677220 A FR 677220A FR 677220D A FR677220D A FR 677220DA FR 677220 A FR677220 A FR 677220A
Authority
FR
France
Prior art keywords
projection devices
cinematographic projection
lantern
bodies
lantern bodies
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)
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 FR677220A publication Critical patent/FR677220A/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)
FR677220D 1928-06-29 1929-06-22 Improvements to the lantern bodies for cinematographic projection devices and others Expired FR677220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB677220X 1928-06-29

Publications (1)

Publication Number Publication Date
FR677220A true FR677220A (en) 1930-03-05

Family

ID=10492187

Family Applications (1)

Application Number Title Priority Date Filing Date
FR677220D Expired FR677220A (en) 1928-06-29 1929-06-22 Improvements to the lantern bodies for cinematographic projection devices and others

Country Status (1)

Country Link
FR (1) FR677220A (en)

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