FR508479A - Automatically controlled switch for industrial photographic reproductions - Google Patents

Automatically controlled switch for industrial photographic reproductions

Info

Publication number
FR508479A
FR508479A FR508479A FR508479DA FR508479A FR 508479 A FR508479 A FR 508479A FR 508479 A FR508479 A FR 508479A FR 508479D A FR508479D A FR 508479DA FR 508479 A FR508479 A FR 508479A
Authority
FR
France
Prior art keywords
automatically controlled
controlled switch
photographic reproductions
industrial photographic
industrial
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
FR508479A
Other languages
French (fr)
Inventor
Edmond Chagniard
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR508479A publication Critical patent/FR508479A/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
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/18—Maintaining or producing contact pressure between original and light-sensitive material
    • G03B27/22—Maintaining or producing contact pressure between original and light-sensitive material by stretching over a curved surface

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR508479A 1914-02-16 1915-03-23 Automatically controlled switch for industrial photographic reproductions Expired FR508479A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE508479X 1914-02-16

Publications (1)

Publication Number Publication Date
FR508479A true FR508479A (en) 1920-10-13

Family

ID=3870961

Family Applications (1)

Application Number Title Priority Date Filing Date
FR508479A Expired FR508479A (en) 1914-02-16 1915-03-23 Automatically controlled switch for industrial photographic reproductions

Country Status (1)

Country Link
FR (1) FR508479A (en)

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