FR569058A - Light passage slit cleaning device, for cinematographic devices - Google Patents

Light passage slit cleaning device, for cinematographic devices

Info

Publication number
FR569058A
FR569058A FR569058DA FR569058A FR 569058 A FR569058 A FR 569058A FR 569058D A FR569058D A FR 569058DA FR 569058 A FR569058 A FR 569058A
Authority
FR
France
Prior art keywords
cleaning device
light passage
passage slit
slit cleaning
cinematographic
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
Lee De Forest
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 FR569058A publication Critical patent/FR569058A/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
    • G03B1/00—Film strip handling
    • G03B1/42—Guiding, framing, or constraining film in desired position relative to lens system
    • G03B1/48—Gates or pressure devices, e.g. plate

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR569058D 1923-04-28 1923-07-26 Light passage slit cleaning device, for cinematographic devices Expired FR569058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US569058XA 1923-04-28 1923-04-28

Publications (1)

Publication Number Publication Date
FR569058A true FR569058A (en) 1924-04-07

Family

ID=22007277

Family Applications (1)

Application Number Title Priority Date Filing Date
FR569058D Expired FR569058A (en) 1923-04-28 1923-07-26 Light passage slit cleaning device, for cinematographic devices

Country Status (1)

Country Link
FR (1) FR569058A (en)

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