FR918646A - Improvements to photographic lens shutters - Google Patents

Improvements to photographic lens shutters

Info

Publication number
FR918646A
FR918646A FR918646DA FR918646A FR 918646 A FR918646 A FR 918646A FR 918646D A FR918646D A FR 918646DA FR 918646 A FR918646 A FR 918646A
Authority
FR
France
Prior art keywords
photographic lens
lens shutters
shutters
photographic
lens
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
Andre-Ernest Pierrat
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 FR918646A publication Critical patent/FR918646A/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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/58—Means for varying duration of "open" period of shutter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR918646D 1945-09-01 1945-09-01 Improvements to photographic lens shutters Expired FR918646A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR918646T 1945-09-01

Publications (1)

Publication Number Publication Date
FR918646A true FR918646A (en) 1947-02-13

Family

ID=9424599

Family Applications (1)

Application Number Title Priority Date Filing Date
FR918646D Expired FR918646A (en) 1945-09-01 1945-09-01 Improvements to photographic lens shutters

Country Status (1)

Country Link
FR (1) FR918646A (en)

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