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 apparatusInfo
- 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
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.
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) |
-
1920
- 1920-05-04 GB GB2426221A patent/GB171344A/en not_active Expired
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