GB191208911A - Improvements in Photographic Apparatus for Copying, Enlarging and the like. - Google Patents
Improvements in Photographic Apparatus for Copying, Enlarging and the like.Info
- Publication number
- GB191208911A GB191208911A GB191208911DA GB191208911A GB 191208911 A GB191208911 A GB 191208911A GB 191208911D A GB191208911D A GB 191208911DA GB 191208911 A GB191208911 A GB 191208911A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frame
- focusing
- screen
- slide
- partition
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection-Type Copiers In General (AREA)
Abstract
8911. Cohen, A. April 15. Enlarging, copying, &c.-An enlarging-apparatus is described comprising (1) two concentrically-arranged bellows e, h, Fig. 1, whereof the ends of the one e are attached to the inner side of the partition a dividing the screen room b from the operating room b<1>, and to a frame f mounted to slide in an horizontal direction by means such as a track t and rollers s, while the ends of the inner bellows h are attached between the frame f and the lens board j, which is also mounted to slide horizontally; (2) a focusing- screen frame u also mounted to slide horizontally ; and (3) an horizontally-extending board or distance-piece w passing through the frames u, f and the partition a. The distance-board w can be clamped to the frames f, u by screws y, z. A vignette holder 8 is hung from the rod 11 and is vertically adjustable on the suspending-loop 10. The camera is focused by an endless cord m passing over loose pulleys n, p and a pulley r secured to the rack-and-screw focusing-mechanism. The focusing-screen frame 29, Fig. 4, carrying the focusing-screen 28 in one half and the plate frame in the other half, is mounted on a tilting frame 33, Fig. 5, secured to a carrier 36, which is slidably mounted in the frame u, Fig. 1. The copy-holder consists of a panel 17 fitted with adjustable sliding clamps 19, Fig. 2, and hinged to the sliding frame 6. In copying a transparency, this is mounted in the space c of the partition a, and a condenser is mounted between the light 13 and the negative. The condenser is mounted on a panel 23, Fig. 3, which is vertically adjustable on a sliding frame 25 by means of a screw 26. A holder for sensitive paper is also described consisting of a hinged frame 43 which clamps the paper on to a backboard 45, under the pressure of springs 46. The backboard 45 is adjustably mounted on the panel 42 which is adapted to slide in the frame u.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB191208911T | 1912-04-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB191208911A true GB191208911A (en) | 1912-07-11 |
Family
ID=32571712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB191208911D Expired GB191208911A (en) | 1912-04-15 | 1912-04-15 | Improvements in Photographic Apparatus for Copying, Enlarging and the like. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB191208911A (en) |
-
1912
- 1912-04-15 GB GB191208911D patent/GB191208911A/en not_active Expired
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