GB1363007A - Device for controlling shutter exposure time - Google Patents
Device for controlling shutter exposure timeInfo
- Publication number
- GB1363007A GB1363007A GB904872A GB904872A GB1363007A GB 1363007 A GB1363007 A GB 1363007A GB 904872 A GB904872 A GB 904872A GB 904872 A GB904872 A GB 904872A GB 1363007 A GB1363007 A GB 1363007A
- Authority
- GB
- United Kingdom
- Prior art keywords
- capacitor
- shutter
- switch
- exposure time
- leakage current
- 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
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/081—Analogue circuits
- G03B7/083—Analogue circuits for control of exposure time
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Shutters For Cameras (AREA)
- Exposure Control For Cameras (AREA)
Abstract
1363007 Shutter control circuit NIPPON KOGAKU KK 28 Feb 1972 [3 March 1971] 9048/72 Heading G2A A shutter control circuit has a timing capacitor 6 which is such that its leakage current decreases with time when a voltage is applied, the capacitor being connected to a battery 1 except during picture taking so that the leakage current is always low. A tantalum electrolytic capacitor is preferred. As shown, in use a switch 5 is closed to discharge capacitor 6 to a value determined by the light incident on a photo-conductor 2. On shutter release, a switch 7 is opened and a circuit A operates a shutter closing electromagnet (not shown) after a time determined by the charge on capacitor C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1111771A JPS5113574B1 (en) | 1971-03-03 | 1971-03-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1363007A true GB1363007A (en) | 1974-08-14 |
Family
ID=11769052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB904872A Expired GB1363007A (en) | 1971-03-03 | 1972-02-28 | Device for controlling shutter exposure time |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5113574B1 (en) |
| DE (1) | DE2209670C3 (en) |
| FR (1) | FR2127938A5 (en) |
| GB (1) | GB1363007A (en) |
-
1971
- 1971-03-03 JP JP1111771A patent/JPS5113574B1/ja active Pending
-
1972
- 1972-02-28 GB GB904872A patent/GB1363007A/en not_active Expired
- 1972-03-01 DE DE19722209670 patent/DE2209670C3/en not_active Expired
- 1972-03-02 FR FR7207261A patent/FR2127938A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2209670B2 (en) | 1977-10-27 |
| JPS5113574B1 (en) | 1976-04-30 |
| DE2209670A1 (en) | 1972-09-14 |
| FR2127938A5 (en) | 1972-10-13 |
| DE2209670C3 (en) | 1978-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1336491A (en) | Cameras | |
| GB1523421A (en) | Flash and camera device | |
| GB1363008A (en) | Device for controlling exposure time in a camera | |
| GB1378729A (en) | Exposure meters | |
| GB1421834A (en) | Electric exposure time control arrangement for a camera | |
| GB1082860A (en) | Photographic camera shutter with an electronic timing device | |
| GB1092669A (en) | Photographic diaphragm and shutter assembly and camera comprising the same | |
| GB1363007A (en) | Device for controlling shutter exposure time | |
| GB1194393A (en) | Improvements in and relating to Photographic Cameras | |
| GB1452814A (en) | Cameras | |
| GB1263156A (en) | Cameras | |
| GB1328655A (en) | Arrangement for an electronic flash tube | |
| JPS54121116A (en) | Auto focus camera | |
| GB1447525A (en) | Camera shutter control circuit | |
| GB1276881A (en) | Exposure control and shutter release mechanism for a camera | |
| GB1123579A (en) | Device for automatic regulation of a photographic exposure | |
| GB1272073A (en) | An electric shutter control circuit for a photographic camera | |
| GB1359105A (en) | Information holding apparatus | |
| GB1335613A (en) | Electronic circuit | |
| GB1529204A (en) | Camera shutter arrangement | |
| GB1394982A (en) | Camera shutter | |
| GB1508520A (en) | Flash and camera device | |
| GB1380017A (en) | Shutter control arrangement for a camera | |
| GB1453159A (en) | Control circuit for a camera shutter | |
| GB1376694A (en) | Camera shutter mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |