GB642939A - Improvements in photographic projection printing apparatus - Google Patents

Improvements in photographic projection printing apparatus

Info

Publication number
GB642939A
GB642939A GB172549A GB172549A GB642939A GB 642939 A GB642939 A GB 642939A GB 172549 A GB172549 A GB 172549A GB 172549 A GB172549 A GB 172549A GB 642939 A GB642939 A GB 642939A
Authority
GB
United Kingdom
Prior art keywords
printing apparatus
projection printing
photographic projection
photographic
projection
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
GB172549A
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.)
FREDERIC JOHN BUTCHER
JOHNSONS OF HENDON Ltd
Original Assignee
FREDERIC JOHN BUTCHER
JOHNSONS OF HENDON Ltd
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 FREDERIC JOHN BUTCHER, JOHNSONS OF HENDON Ltd filed Critical FREDERIC JOHN BUTCHER
Priority to GB172549A priority Critical patent/GB642939A/en
Publication of GB642939A publication Critical patent/GB642939A/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
    • G03B27/40—Means for automatic focusing therefor by mechanical connections, e.g. by cam, by linkage adapted for use with lenses of different focal length
GB172549A 1945-10-23 1945-10-23 Improvements in photographic projection printing apparatus Expired GB642939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB172549A GB642939A (en) 1945-10-23 1945-10-23 Improvements in photographic projection printing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB172549A GB642939A (en) 1945-10-23 1945-10-23 Improvements in photographic projection printing apparatus

Publications (1)

Publication Number Publication Date
GB642939A true GB642939A (en) 1950-09-13

Family

ID=9726916

Family Applications (1)

Application Number Title Priority Date Filing Date
GB172549A Expired GB642939A (en) 1945-10-23 1945-10-23 Improvements in photographic projection printing apparatus

Country Status (1)

Country Link
GB (1) GB642939A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049968A (en) * 1959-03-02 1962-08-21 Xerox Corp Xerographic reproduction apparatus
US3176578A (en) * 1959-11-20 1965-04-06 Bolsey Emil Optical projection device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049968A (en) * 1959-03-02 1962-08-21 Xerox Corp Xerographic reproduction apparatus
US3176578A (en) * 1959-11-20 1965-04-06 Bolsey Emil Optical projection device

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