GB1486668A - Photographic cameras - Google Patents
Photographic camerasInfo
- Publication number
- GB1486668A GB1486668A GB7442/75A GB744275A GB1486668A GB 1486668 A GB1486668 A GB 1486668A GB 7442/75 A GB7442/75 A GB 7442/75A GB 744275 A GB744275 A GB 744275A GB 1486668 A GB1486668 A GB 1486668A
- Authority
- GB
- United Kingdom
- Prior art keywords
- selector
- exposure
- photography
- leds
- feb
- 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
- G03B7/091—Digital circuits
- G03B7/093—Digital circuits for control of exposure time
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Shutter-Related Mechanisms (AREA)
- Exposure Control For Cameras (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
Abstract
1486668 Cameras SEIKO KOKI KK 21 Feb 1975 [22 Feb 1974] 7442/75 Heading G2A In a camera as described in Specification 1479705 the auto/manual selector switch, Fig. 3 has an additional contact 8-30M for bulb exposures. When a selector contact 8-20M is moved to bridge contacts 8-10M and 8-30M all the contact terminals 8-1 to 8-8 become "1" and all the switch elements (16-1 to 16-8) Fig. 2 (not shown) become non-conductive. Thus no exposure termination pulse can pass from the pulse counter (7) and the shutter electromagnet (Mg) stays energized until the supply switch (SW1) is opened. An indicator circuit, Fig. 4, comprises an array of LEDs L 1 to L5 which are connected to the counter (7) and in the automatic mode indicate shutter speed, over and under-exposure when photography is possible and "overflow" when photography is not possible. The LEDs are extinguished upon shutter release. This arrangement is as described in Specification 1463859. The circuit shown in Fig. 4 of the present application also includes connections to manual exposure time selector contacts 8-1, 8-2 M ... to indicate the manually set time as well.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49021266A JPS50115819A (en) | 1974-02-22 | 1974-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1486668A true GB1486668A (en) | 1977-09-21 |
Family
ID=12050290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7442/75A Expired GB1486668A (en) | 1974-02-22 | 1975-02-21 | Photographic cameras |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS50115819A (en) |
| DE (1) | DE2507784A1 (en) |
| FR (1) | FR2262320B1 (en) |
| GB (1) | GB1486668A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60181730U (en) * | 1985-04-04 | 1985-12-03 | キヤノン株式会社 | electric shutter camera |
-
1974
- 1974-02-22 JP JP49021266A patent/JPS50115819A/ja active Pending
-
1975
- 1975-02-21 GB GB7442/75A patent/GB1486668A/en not_active Expired
- 1975-02-21 FR FR7505491A patent/FR2262320B1/fr not_active Expired
- 1975-02-22 DE DE19752507784 patent/DE2507784A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR2262320B1 (en) | 1978-12-29 |
| DE2507784A1 (en) | 1975-08-28 |
| JPS50115819A (en) | 1975-09-10 |
| FR2262320A1 (en) | 1975-09-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |