GB1327940A - Shutter device - Google Patents
Shutter deviceInfo
- Publication number
- GB1327940A GB1327940A GB5704770A GB5704770A GB1327940A GB 1327940 A GB1327940 A GB 1327940A GB 5704770 A GB5704770 A GB 5704770A GB 5704770 A GB5704770 A GB 5704770A GB 1327940 A GB1327940 A GB 1327940A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shutter
- lever
- flash
- dec
- rotates
- 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
- G03B9/70—Exposure-making shutters; Diaphragms with flash-synchronising contacts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Stroboscope Apparatuses (AREA)
- Shutter-Related Mechanisms (AREA)
Abstract
1327940 Photographic shutters CANON K K 1 Dec 1970 [1 Dec 1969 12 Dec 1969 18 Dec 1969 27 Dec 1969] 57047/70 Heading G2A A shutter device has a blade ring 3 arranged to move so that the shutter blades 3' open at a constant rate, and a flash synchroniser switch which is closed by the blade ring when the blade opening reaches a value determined for an appropriate flash exposure. A shutter release lever 2 is depressed in the direction of arrow A so that a stepped portion 2b engages with and rotates a latch member 13 to free control lever 14. A main switch 12 is closed to energize an exposure control circuit and an electromagnet 28 and an anchor 18 of a delay device starts to move. A gear 17, with a pin 19, starts rotating in a clockwise direction under the action of a spring (not shown) and frees lever 16. The blade ring 3 thus rotates under action of a spring 30 and the shutter opens at a constant rate. For EE photography, opening of contacts 42 allows a condenser to charge at a rate determined by scene illumination incident upon a photo-conductor. At the end of the exposure interval, an electromagnet 28 is de-energized. Lock pawl 26 is freed for rotation (lever 20 having been previously rotated by bottom end portion 2c of shutter release 2) and a convex end 26a thereof engages and rotates lever 16 counter clockwise and thus closes the shutter. The maximum value of the opening of the shutter is indicated in a viewfinder 46 by a lever 44 which is frictionally pivoted and reset by member 47. For flash operation, a change-over ring 29 is positioned according to the film guide number, and at the same time switches a fixed resistance in place of the photo-conductor in the control circuit to give a fixed shutter time. A distance ring 39 is also adjusted to the object distance. An adder member 4 rotates about a pin 7 during these movement so that a contact member 40 thereon lies in the path of movement of a pin 41, the position of contact member 40 thus determining the aperture opening of the shutter and at the same time ensuring that the flash occurs when the shutter is at the maximum aperture. The shutter is designed to allow for the rather long time-to-peak characteristic of a flash bulb. Alternatively, a flash discharge tube is used, and arrangements are described, Fig. 9-12, (not shown), using a contactless synchronizer, either associated with the electronic timing circuit or using a lamp which illuminates a phototransistor in the discharge tube trigger circuit, the lamp being lit upon de-energization of the electromagnet 28.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9666569 | 1969-12-01 | ||
JP10021869 | 1969-12-12 | ||
JP1969120729U JPS5126137Y1 (en) | 1969-12-18 | 1969-12-18 | |
JP20969 | 1969-12-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1327940A true GB1327940A (en) | 1973-08-22 |
Family
ID=27453113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5704770A Expired GB1327940A (en) | 1969-12-01 | 1970-12-01 | Shutter device |
Country Status (4)
Country | Link |
---|---|
US (1) | US3688663A (en) |
DE (1) | DE2058680B2 (en) |
FR (1) | FR2072646A5 (en) |
GB (1) | GB1327940A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4174161A (en) * | 1969-11-06 | 1979-11-13 | Canon Kabushiki Kaisha | Exposure control system |
US4016575A (en) * | 1974-04-03 | 1977-04-05 | Canon Kabushiki Kaisha | Exposure control system for flash photography |
FR2356175A1 (en) * | 1976-06-25 | 1978-01-20 | Minolta Camera Kk | FLASH EXPOSURE CONTROL DEVICE |
JPS5439042U (en) * | 1977-08-23 | 1979-03-14 | ||
US4375912A (en) * | 1978-01-25 | 1983-03-08 | Ricoh Company, Ltd. | Electric circuits for use in camera |
DE3033453C2 (en) * | 1980-09-05 | 1984-01-05 | Balda-Werke Photographische Geräte und Kunststoff GmbH & Co KG, 4980 Bünde | Electrically controlled program lock |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1203601B (en) * | 1963-02-06 | 1965-10-21 | Prontor Werk Gauthier Gmbh | Photographic camera with automatic aperture setting in the flash light area |
US3452659A (en) * | 1965-08-03 | 1969-07-01 | Agfa Gevaert Ag | Camera with photoflash unit |
DE1472696A1 (en) * | 1965-11-23 | 1968-12-05 | Prontor Werk Gauthier Gmbh | Photographic camera with automatic film speed adjustment device |
CH446878A (en) * | 1965-12-01 | 1967-11-15 | Compur Werk Gmbh & Co | Photo recording device with electronic device for setting the exposure factor |
DE1472697A1 (en) * | 1965-12-04 | 1968-12-05 | Prontor Werk Gauthier Gmbh | Photographic camera with electronically controlled timing device |
US3512463A (en) * | 1966-07-28 | 1970-05-19 | Agfa Gevaert Ag | Camera with built-in exposure meter for daylight and flash photography |
DE1522335A1 (en) * | 1966-10-29 | 1969-08-07 | Zeiss Ikon Ag | Photographic camera with flash work area |
DE1522012A1 (en) * | 1967-02-16 | 1969-06-26 | Agfa Gevaert Ag | Photographic camera with an exposure control device and a flashlight device |
-
1970
- 1970-11-28 DE DE2058680A patent/DE2058680B2/en active Pending
- 1970-11-30 US US93721A patent/US3688663A/en not_active Expired - Lifetime
- 1970-11-30 FR FR7042978A patent/FR2072646A5/fr not_active Expired
- 1970-12-01 GB GB5704770A patent/GB1327940A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3688663A (en) | 1972-09-05 |
FR2072646A5 (en) | 1971-09-24 |
DE2058680A1 (en) | 1971-07-22 |
DE2058680B2 (en) | 1974-10-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |