GB382729A - Improvements relating to the production of photographic prints - Google Patents

Improvements relating to the production of photographic prints

Info

Publication number
GB382729A
GB382729A GB2786731A GB2786731A GB382729A GB 382729 A GB382729 A GB 382729A GB 2786731 A GB2786731 A GB 2786731A GB 2786731 A GB2786731 A GB 2786731A GB 382729 A GB382729 A GB 382729A
Authority
GB
United Kingdom
Prior art keywords
camera
moved
screen
electric motor
cams
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
GB2786731A
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.)
THOMAS KNOWLES FRANK
Original Assignee
THOMAS KNOWLES FRANK
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 THOMAS KNOWLES FRANK filed Critical THOMAS KNOWLES FRANK
Priority to GB2786731A priority Critical patent/GB382729A/en
Publication of GB382729A publication Critical patent/GB382729A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection-Type Copiers In General (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)

Abstract

382,729. Photographic projectionprinting apparatus. FRANK, T. K., 10, Mile End Road, South Shields, Co. Durham. Oct. 7, 1931, No. 27867. [Classes 98 (i) and 98 (ii).] In order to enable the relative sizes of parts of a photographic image to be altered during printing, a copying or other camera of the automatic focusing type is combined with an opaque screen mounted in front of the sensitized surface and having one or more slits through which the sensitized surface is exposed by moving the screen across it during the exposure, or by moving the object and sensitized surface simultaneously in opposite directions. In the form shown, the sensitive surface b, Fig. 1, is successively exposed through an adjustable slit d in the screen c which is moved across the surface b by gearing f driven from the electric motor g. The camera a is of the automatic focusing type. In a modification the screen c is stationary and the sensitive surface b is moved on a carriage across the table, a second electric motor being provided to move the negative in synchronism. In a further modification as applied to a camera for making reproductions direct from an object, the camera a is mounted on brackets n sliding on guide rods n<1> on a base q and is moved by a threaded shaft p operated by a hand-wheel p<2>. The lens board u is slidable on the base r of the camera and is moved independently of the camera by pins u<1> engaging cams t on a shaft s having slotted arms engaging pins on a block mounted for longitudinal movement on the threaded shaft p, the cams t being designed to maintain correct focus when the camera is moved.
GB2786731A 1931-10-07 1931-10-07 Improvements relating to the production of photographic prints Expired GB382729A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2786731A GB382729A (en) 1931-10-07 1931-10-07 Improvements relating to the production of photographic prints

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2786731A GB382729A (en) 1931-10-07 1931-10-07 Improvements relating to the production of photographic prints

Publications (1)

Publication Number Publication Date
GB382729A true GB382729A (en) 1932-11-03

Family

ID=10266590

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2786731A Expired GB382729A (en) 1931-10-07 1931-10-07 Improvements relating to the production of photographic prints

Country Status (1)

Country Link
GB (1) GB382729A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2549699A (en) * 1945-09-19 1951-04-17 Dean B Mclaughlin Photographic method and apparatus
US2925465A (en) * 1951-12-07 1960-02-16 Girod Associates Apparatus for photocomposing and the like
GB2159300A (en) * 1984-05-25 1985-11-27 Dainippon Screen Mfg A method of and apparatus for producing reduced and/or enlarged reproduction images
US5768984A (en) * 1994-12-21 1998-06-23 C.L.G. Inversiones, S.L. Precision fish seasoning machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2549699A (en) * 1945-09-19 1951-04-17 Dean B Mclaughlin Photographic method and apparatus
US2925465A (en) * 1951-12-07 1960-02-16 Girod Associates Apparatus for photocomposing and the like
GB2159300A (en) * 1984-05-25 1985-11-27 Dainippon Screen Mfg A method of and apparatus for producing reduced and/or enlarged reproduction images
US4679930A (en) * 1984-05-25 1987-07-14 Dainippon Screen Mfg. Co., Ltd. One-way reducing and enlarging printer
US5768984A (en) * 1994-12-21 1998-06-23 C.L.G. Inversiones, S.L. Precision fish seasoning machine

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