FR786406A - Improvements in photographic enlargement, reproduction and reduction devices - Google Patents

Improvements in photographic enlargement, reproduction and reduction devices

Info

Publication number
FR786406A
FR786406A FR786406DA FR786406A FR 786406 A FR786406 A FR 786406A FR 786406D A FR786406D A FR 786406DA FR 786406 A FR786406 A FR 786406A
Authority
FR
France
Prior art keywords
reproduction
reduction devices
photographic enlargement
enlargement
photographic
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
Louis Lemaire
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 FR786406A publication Critical patent/FR786406A/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
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/34—Means for automatic focusing therefor
    • G03B27/36—Means for automatic focusing therefor by mechanical connections, e.g. by cam, by linkage
    • G03B27/38—Means for automatic focusing therefor by mechanical connections, e.g. by cam, by linkage embodying screws with non-uniform pitch

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR786406D 1935-02-28 1935-02-28 Improvements in photographic enlargement, reproduction and reduction devices Expired FR786406A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR786406T 1935-02-28

Publications (1)

Publication Number Publication Date
FR786406A true FR786406A (en) 1935-09-03

Family

ID=9218355

Family Applications (1)

Application Number Title Priority Date Filing Date
FR786406D Expired FR786406A (en) 1935-02-28 1935-02-28 Improvements in photographic enlargement, reproduction and reduction devices

Country Status (1)

Country Link
FR (1) FR786406A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2555460A (en) * 1947-03-22 1951-06-05 Tlusty Antonin Autofocus enlarger
US3105410A (en) * 1959-03-06 1963-10-01 Pako Corp Photographic printer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2555460A (en) * 1947-03-22 1951-06-05 Tlusty Antonin Autofocus enlarger
US3105410A (en) * 1959-03-06 1963-10-01 Pako Corp Photographic printer

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