GB572172A - Improvements in or relating to photographic shutters - Google Patents
Improvements in or relating to photographic shuttersInfo
- Publication number
- GB572172A GB572172A GB14737/43A GB1473743A GB572172A GB 572172 A GB572172 A GB 572172A GB 14737/43 A GB14737/43 A GB 14737/43A GB 1473743 A GB1473743 A GB 1473743A GB 572172 A GB572172 A GB 572172A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exposure
- aperture
- cover
- blades
- spring
- 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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
- G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
- G03B9/16—Two separate members moving in the same direction
Abstract
572,172. Photographic shutters. KODAK, Ltd. Sept. 8, 1943, No. 14737. Convention date, Sept. 23, 1942. [Class 98 (i)] A shutter includes within the casing a master member having a pivotally-mounted gear segment meshing with pinions for operating pivoted blades and also includes a pivoted cover normally spring-biassed to cover the exposure aperture and adapted to be moved therefrom by the master member after it has moved a sufficient distance during its setting or tensioning operation to ensure the aperture being covered by the blades, the return of the cover on operation of the shutter to effect an exposure to its aperture-covering. position being retarded by retarding-means to enable the blades to complete the exposure. As shown, the exposure aperture 3 in the casing 1 is normally covered by a pair of disc-shaped blades 4, each mounted on a pivot 5 carrying a pinion 6 and provided with a circular or arcuate opening 7. A master member 8 pivoted at 9 and having a setting handle 11 and a gear segment 10 meshing with the pinions 6 is operable to effect an exposure by a spring 14. A shoulder 17 is engageable by the latch member 18 of a trigger 19 turned clockwise by the spring 21. On depressing the trigger 19, the master member is released to effect the exposure, an anti-rebound device being provided as in Specification 572,173. The pivoted cover 40 has a gear segment 42 meshing with a pinion 43 carried by a fly-wheel 44 mounted on a stud 45, and is normally held to cover the aperture 3 by a spring 47. The setting movement of handle 11 tensions the master member spring 14, returns the friction shoe 26 of the shock absorber to its initial position, and by lug 24 swings the cover 40 to uncover the aperture 3, which remains covered by the blades 4. On depressing trigger 19, the blades 4 move relatively slowly, but rapidly accelerate, and since the cover 40 is retarded by the fly-wheel, the aperture 3 is not covered until the exposure is made. A flash-lamp synchronizing mechanism is provided as described in Specification 572,174.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US572172XA | 1942-09-23 | 1942-09-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB572172A true GB572172A (en) | 1945-09-26 |
Family
ID=22009217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14737/43A Expired GB572172A (en) | 1942-09-23 | 1943-09-08 | Improvements in or relating to photographic shutters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB572172A (en) |
-
1943
- 1943-09-08 GB GB14737/43A patent/GB572172A/en not_active Expired
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