GB171344A - Improvements in and relating to means for centralising and lining-up a negative in photographic projection or contact printing apparatus - Google Patents

Improvements in and relating to means for centralising and lining-up a negative in photographic projection or contact printing apparatus

Info

Publication number
GB171344A
GB171344A GB2426221A GB2426221A GB171344A GB 171344 A GB171344 A GB 171344A GB 2426221 A GB2426221 A GB 2426221A GB 2426221 A GB2426221 A GB 2426221A GB 171344 A GB171344 A GB 171344A
Authority
GB
United Kingdom
Prior art keywords
negative
bar
lining
centralising
relating
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
GB2426221A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2426221A priority Critical patent/GB171344A/en
Publication of GB171344A publication Critical patent/GB171344A/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
    • G03B27/52—Details
    • G03B27/62—Holders for the original
    • G03B27/6271—Holders for the original in enlargers
    • G03B27/6278—Handling single frame negatives

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Holders For Sensitive Materials And Originals (AREA)

Abstract

171,344. Boedicker, H. C. May 4, 1920. Printing-apparatus.-Apparatus is described for centralizing and lining up a photographic negative hold in an adjustable mounting of a printing or copying apparatus such as is described in Specifications 155,340 and 171,343. A protractor 205 having a spirit level is suspended from a graduated bar 208 which itself is supported in front of the negative by pins 206 on an adjustable part of the negative mounting. The protractor has scales 210, 211, 212 for angular adjustments and a bar 209 which can be clamped in position by a binding clamp 215. The lower part of the bar 209 is scaled and carries a transverse scaled bar 227 which is slidably mounted on the bar 209 and clamped in position by a clamping screw 225.
GB2426221A 1920-05-04 1920-05-04 Improvements in and relating to means for centralising and lining-up a negative in photographic projection or contact printing apparatus Expired GB171344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2426221A GB171344A (en) 1920-05-04 1920-05-04 Improvements in and relating to means for centralising and lining-up a negative in photographic projection or contact printing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2426221A GB171344A (en) 1920-05-04 1920-05-04 Improvements in and relating to means for centralising and lining-up a negative in photographic projection or contact printing apparatus

Publications (1)

Publication Number Publication Date
GB171344A true GB171344A (en) 1921-11-04

Family

ID=10208949

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2426221A Expired GB171344A (en) 1920-05-04 1920-05-04 Improvements in and relating to means for centralising and lining-up a negative in photographic projection or contact printing apparatus

Country Status (1)

Country Link
GB (1) GB171344A (en)

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