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GB168728A - Improvements in or relating to photographic printing frames - Google Patents

Improvements in or relating to photographic printing frames

Info

Publication number
GB168728A
GB168728A GB1829420A GB1829420A GB168728A GB 168728 A GB168728 A GB 168728A GB 1829420 A GB1829420 A GB 1829420A GB 1829420 A GB1829420 A GB 1829420A GB 168728 A GB168728 A GB 168728A
Authority
GB
United Kingdom
Prior art keywords
relating
photographic printing
printing frames
hook
pin
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
GB1829420A
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.)
HOUGHTON BUTCHER Manufacturing CO Ltd
Original Assignee
HOUGHTON BUTCHER Manufacturing CO 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 HOUGHTON BUTCHER Manufacturing CO Ltd filed Critical HOUGHTON BUTCHER Manufacturing CO Ltd
Priority to GB1829420A priority Critical patent/GB168728A/en
Publication of GB168728A publication Critical patent/GB168728A/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
    • G03B27/02—Exposure apparatus for contact printing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

168,728. Houghton- Butcher Manufacturing Co., Ltd., and Denniss, A. J. July 2, 1920. Printing-frames.-A hook or slotted member 6 attached to or integral with the clamping-spring 3 engages a pin or stud 7 on the frame and by cam action draws the edge 5 of the back into contact with the end rail 2a of the frame, thereby preventing slipping. The cam action may be secured by the inner edge 8 of the hook, or by making the pin 7 rotatable and providing it with a cam surface. Specification 3648/04 is referred to.
GB1829420A 1920-07-02 1920-07-02 Improvements in or relating to photographic printing frames Expired GB168728A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1829420A GB168728A (en) 1920-07-02 1920-07-02 Improvements in or relating to photographic printing frames

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1829420A GB168728A (en) 1920-07-02 1920-07-02 Improvements in or relating to photographic printing frames

Publications (1)

Publication Number Publication Date
GB168728A true GB168728A (en) 1921-09-15

Family

ID=10109987

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1829420A Expired GB168728A (en) 1920-07-02 1920-07-02 Improvements in or relating to photographic printing frames

Country Status (1)

Country Link
GB (1) GB168728A (en)

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