GB1391293A - Photographic exposure control apparatus - Google Patents
Photographic exposure control apparatusInfo
- Publication number
- GB1391293A GB1391293A GB1796673A GB1796673A GB1391293A GB 1391293 A GB1391293 A GB 1391293A GB 1796673 A GB1796673 A GB 1796673A GB 1796673 A GB1796673 A GB 1796673A GB 1391293 A GB1391293 A GB 1391293A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shutter
- switch
- firing circuit
- energize
- solenoid
- 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
- 238000010304 firing Methods 0.000 abstract 5
- 230000011514 reflex Effects 0.000 abstract 4
- 239000003990 capacitor Substances 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 230000000881 depressing effect Effects 0.000 abstract 1
- 238000005286 illumination Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000001960 triggered effect Effects 0.000 abstract 1
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
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/04—Combinations of cameras with non-electronic flash apparatus; Non-electronic flash units
- G03B15/0452—Electrical ignition means connected to the shutter
-
- 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
-
- 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
-
- 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
- G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera
-
- 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
- G03B9/58—Means for varying duration of "open" period of shutter
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Shutters For Cameras (AREA)
- Stroboscope Apparatuses (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24689172A | 1972-04-24 | 1972-04-24 | |
US00333331A US3820128A (en) | 1972-04-24 | 1973-02-16 | Flash photographic control system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1391293A true GB1391293A (en) | 1975-04-23 |
Family
ID=26938305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1796673A Expired GB1391293A (en) | 1972-04-24 | 1973-04-13 | Photographic exposure control apparatus |
Country Status (3)
Country | Link |
---|---|
US (1) | US3820128A (US06623731-20030923-C00052.png) |
FR (1) | FR2226075A5 (US06623731-20030923-C00052.png) |
GB (1) | GB1391293A (US06623731-20030923-C00052.png) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4005449A (en) * | 1973-12-13 | 1977-01-25 | Polaroid Corporation | Flash photographic system with camera inhibit feature |
US3896459A (en) * | 1974-05-29 | 1975-07-22 | Honeywell Inc | Control circuit for an automatic photographic camera |
US4023187A (en) * | 1975-10-03 | 1977-05-10 | Polaroid Corporation | Exposure control system with fill flash race condition |
US4017873A (en) * | 1975-10-03 | 1977-04-12 | Polaroid Corporation | Exposure control system with braking capability |
US4008481A (en) * | 1975-10-03 | 1977-02-15 | Polaroid Corporation | Exposure control system with separate flash and ambient trigger levels |
US4017876A (en) * | 1976-01-13 | 1977-04-12 | Polaroid Corporation | Shutter latch system with automatic release for shock damping member |
GB1566893A (en) * | 1976-01-13 | 1980-05-08 | Polaroid Corp | Photographic shutter control apparatus |
US4182561A (en) * | 1978-08-03 | 1980-01-08 | Polaroid Corporation | Fast charging electronic flash device |
US4185144A (en) * | 1978-09-05 | 1980-01-22 | Polaroid Corporation | Electrochemical cell with a cadmium patch electrode |
US4184756A (en) * | 1978-10-13 | 1980-01-22 | Polaroid Corporation | Strobe without primary storage capacitor |
US4291964A (en) * | 1980-01-28 | 1981-09-29 | Polaroid Corporation | Strobe switch with camera control feature |
-
1973
- 1973-02-16 US US00333331A patent/US3820128A/en not_active Expired - Lifetime
- 1973-04-13 GB GB1796673A patent/GB1391293A/en not_active Expired
- 1973-04-20 FR FR7314655A patent/FR2226075A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2226075A5 (US06623731-20030923-C00052.png) | 1974-11-08 |
US3820128A (en) | 1974-06-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |