FR768557A - Improvements to photographic magnifiers - Google Patents
Improvements to photographic magnifiersInfo
- Publication number
- FR768557A FR768557A FR768557DA FR768557A FR 768557 A FR768557 A FR 768557A FR 768557D A FR768557D A FR 768557DA FR 768557 A FR768557 A FR 768557A
- Authority
- FR
- France
- Prior art keywords
- magnifiers
- photographic
- photographic magnifiers
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE768557X | 1933-04-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR768557A true FR768557A (en) | 1934-08-08 |
Family
ID=6673748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR768557D Expired FR768557A (en) | 1933-04-01 | 1934-02-12 | Improvements to photographic magnifiers |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR768557A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2741945A (en) * | 1952-11-06 | 1956-04-17 | Broms Allan | Copying camera assembly |
US2772599A (en) * | 1950-06-03 | 1956-12-04 | Broms Allan | Method of setting the elements of an optical system and projector and copying camera for performing the same |
-
1934
- 1934-02-12 FR FR768557D patent/FR768557A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2772599A (en) * | 1950-06-03 | 1956-12-04 | Broms Allan | Method of setting the elements of an optical system and projector and copying camera for performing the same |
US2741945A (en) * | 1952-11-06 | 1956-04-17 | Broms Allan | Copying camera assembly |
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