FR927024A - Improvements to photographic magnifiers and projection lanterns - Google Patents

Improvements to photographic magnifiers and projection lanterns

Info

Publication number
FR927024A
FR927024A FR927024DA FR927024A FR 927024 A FR927024 A FR 927024A FR 927024D A FR927024D A FR 927024DA FR 927024 A FR927024 A FR 927024A
Authority
FR
France
Prior art keywords
magnifiers
photographic
lanterns
projection
projection lanterns
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)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR927024A publication Critical patent/FR927024A/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
FR927024D 1945-05-18 1946-05-17 Improvements to photographic magnifiers and projection lanterns Expired FR927024A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US927024XA 1945-05-18 1945-05-18

Publications (1)

Publication Number Publication Date
FR927024A true FR927024A (en) 1947-10-17

Family

ID=22234646

Family Applications (1)

Application Number Title Priority Date Filing Date
FR927024D Expired FR927024A (en) 1945-05-18 1946-05-17 Improvements to photographic magnifiers and projection lanterns

Country Status (1)

Country Link
FR (1) FR927024A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2679784A (en) * 1951-05-16 1954-06-01 Simmon Brothers Inc Lantern slide projector having lenses of different focus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2679784A (en) * 1951-05-16 1954-06-01 Simmon Brothers Inc Lantern slide projector having lenses of different focus

Similar Documents

Publication Publication Date Title
FR927024A (en) Improvements to photographic magnifiers and projection lanterns
FR1054887A (en) Photographic lens
FR1050060A (en) Photographic magnifier
FR1057720A (en) Photographic lens
FR1045076A (en) Photographic telephoto lens
FR994156A (en) Improvements to photographic enlargements
FR927339A (en) Photographic enlarger
FR1061347A (en) Photographic lens
FR952113A (en) Photographic lens
FR933643A (en) Improvements to cinematographic projection devices
FR939514A (en) Folding camera with automatic lens positioning
FR949664A (en) Improvements to photographic projection devices
FR918646A (en) Improvements to photographic lens shutters
FR998123A (en) Photographic lens
FR997899A (en) Photographic viewfinder
FR1083840A (en) Photographic lens
FR1039814A (en) Photographic lens
FR1048977A (en) Photographic lens
FR941726A (en) Improvements to cameras
FR920341A (en) Improvements to magnification cameras
FR925466A (en) Improvement in photographic enlargements
FR1102455A (en) Improvement of the drive drums of bi-film cinematographic projection devices
FR1031927A (en) Photographic lens
FR917949A (en) photographic screen lighting
FR926287A (en) Improvements to cinematographic cameras and projection