GB618361A - Improvements in or relating to photographic objective mounts - Google Patents
Improvements in or relating to photographic objective mountsInfo
- Publication number
- GB618361A GB618361A GB3178246A GB3178246A GB618361A GB 618361 A GB618361 A GB 618361A GB 3178246 A GB3178246 A GB 3178246A GB 3178246 A GB3178246 A GB 3178246A GB 618361 A GB618361 A GB 618361A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- objective
- lens
- gears
- mirror
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
Abstract
618,361. Photographic objective mounts. KODAK, Ltd. (Eastman Kodak, Co., Wood, D. L., Silberstein, G. P., and Aklin, G. H.). Oct. 25, 1946, No. 31782. [Classes 97 (i) and 98 (i)] An objective is mounted so that the front portion is fixed relative to the focal plane and the rear portion is axially movable for focussing. Fig. 1 shows a photographic camera in which the front positive portion of the objective comprising lenses 16, 17, 18 is carried by a threaded barrel 19 fixed to the shutter 3. The rear negative lens 15 is in a mount 23 in screw engagement with the cell 20 of the lens 16 and is rotated for axial movement by a gear 25 engaging teeth on the cell 20, the gear being operated by a disc 30 through shafts 29, 26 and gears 28, 27. Alternatively gears 29, 28, 25 may be replaced by a single crown wheel on the shaft 29 or the shaft 26 may extend through the casing and terminate in an operating knob. Shaft 29 carries a cam 36, Fig. 2, engaging a pin 40 on a rotatable arm 42 carrying one mirror 46 of a coincidence rangefinder, the other mirror 47 being viewed through the aperture 76. The focussing movement is thus coupled to the rangefinder adjustment. The lens may be of the type described in Specification 618,360.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3178246A GB618361A (en) | 1946-10-25 | 1946-10-25 | Improvements in or relating to photographic objective mounts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3178246A GB618361A (en) | 1946-10-25 | 1946-10-25 | Improvements in or relating to photographic objective mounts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB618361A true GB618361A (en) | 1949-02-21 |
Family
ID=10328331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3178246A Expired GB618361A (en) | 1946-10-25 | 1946-10-25 | Improvements in or relating to photographic objective mounts |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB618361A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE948648C (en) * | 1953-06-24 | 1956-09-06 | Otto Selmer | Adjustment device for rows of numbers |
| GB2333852A (en) * | 1998-01-28 | 1999-08-04 | Umax Data Systems Inc | Camera lens focussing using a screw shaft |
-
1946
- 1946-10-25 GB GB3178246A patent/GB618361A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE948648C (en) * | 1953-06-24 | 1956-09-06 | Otto Selmer | Adjustment device for rows of numbers |
| GB2333852A (en) * | 1998-01-28 | 1999-08-04 | Umax Data Systems Inc | Camera lens focussing using a screw shaft |
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