FR689923A - Improvements to devices used for cooling the light beam in cinematographic projections - Google Patents

Improvements to devices used for cooling the light beam in cinematographic projections

Info

Publication number
FR689923A
FR689923A FR689923DA FR689923A FR 689923 A FR689923 A FR 689923A FR 689923D A FR689923D A FR 689923DA FR 689923 A FR689923 A FR 689923A
Authority
FR
France
Prior art keywords
cooling
light beam
devices used
cinematographic
projections
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
Leon Claude Frassier
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 FR689923A publication Critical patent/FR689923A/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)
FR689923D 1929-04-25 1929-04-25 Improvements to devices used for cooling the light beam in cinematographic projections Expired FR689923A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR689923T 1929-04-25

Publications (1)

Publication Number Publication Date
FR689923A true FR689923A (en) 1930-09-12

Family

ID=9027562

Family Applications (1)

Application Number Title Priority Date Filing Date
FR689923D Expired FR689923A (en) 1929-04-25 1929-04-25 Improvements to devices used for cooling the light beam in cinematographic projections

Country Status (1)

Country Link
FR (1) FR689923A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE926463C (en) * 1952-09-07 1955-04-18 Zeiss Ikon Dresden Veb Projector for normal or narrow film with water cooling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE926463C (en) * 1952-09-07 1955-04-18 Zeiss Ikon Dresden Veb Projector for normal or narrow film with water cooling

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