GB1289763A - photgraphic apparatus having a diaphragm and or shutter blade actuator frame - Google Patents
photgraphic apparatus having a diaphragm and or shutter blade actuator frameInfo
- Publication number
- GB1289763A GB1289763A GB2202170A GB2202170A GB1289763A GB 1289763 A GB1289763 A GB 1289763A GB 2202170 A GB2202170 A GB 2202170A GB 2202170 A GB2202170 A GB 2202170A GB 1289763 A GB1289763 A GB 1289763A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coils
- current
- frame
- diaphragm
- blade actuator
- 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
- G03B9/02—Diaphragms
- G03B9/07—Diaphragms with means for presetting the diaphragm
-
- 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)
- Diaphragms For Cameras (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
1289763 Actuation of camera shutters and diaphragms CANON K K 7 May 1970 [10 May 1969] 22021/71 Heading G2A A shutter or diaphragm of the pre-setting type has a blade actuator frame 1 carrying at least three equally circumferentially spaced magnets and a stationary supporting member carrying electromagnetic coils 2 corresponding in number and spacing to the magnets, a switching circuit controlling the current supplied to the coils from a power supply. The coils are arranged in an angular direction, as shown, or in a radial direction, Fig.2 (not shown) or in an axial direction parallel to the optical axis of an objective, Fig.3 (not shown). A spring may bias frame 1 to a set position and thus return the frame thereto upon de-energization of the coils, or the switching circuit may simply reverse the direction of the applied current. A capacitor is included in the switching current to provide an initial operating pulse. A transistor circuit, Fig. 5 (not shown), may be used to reverse the current.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4249769 | 1969-05-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1289763A true GB1289763A (en) | 1972-09-20 |
Family
ID=12637683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2202170A Expired GB1289763A (en) | 1969-05-10 | 1970-05-07 | photgraphic apparatus having a diaphragm and or shutter blade actuator frame |
Country Status (3)
Country | Link |
---|---|
US (1) | US3687042A (en) |
DE (1) | DE7016800U (en) |
GB (1) | GB1289763A (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4012750A (en) * | 1971-11-11 | 1977-03-15 | Prontor-Werk Alfred Gauthier Gmbh | Camera shutter with diaphragm and electro-magnetic drive for diaphragm |
US4100558A (en) * | 1972-09-14 | 1978-07-11 | Hiroshi Koike | Automatic-exposure control device for optical instruments |
JPS5081137A (en) * | 1973-11-16 | 1975-07-01 | ||
JPS5081139A (en) * | 1973-11-16 | 1975-07-01 | ||
JPS5081138A (en) * | 1973-11-16 | 1975-07-01 | ||
DE2403315A1 (en) * | 1974-01-24 | 1975-08-07 | Agfa Gevaert Ag | ELECTROMAGNETIC DRIVE DEVICE |
US4041512A (en) * | 1974-02-22 | 1977-08-09 | West Electric Co., Ltd. | Light control device |
DE2728824C3 (en) * | 1977-06-27 | 1981-07-09 | Prontor-Werk Alfred Gauthier Gmbh, 7547 Wildbad | Photographic camera shutter |
US4213689A (en) * | 1979-03-22 | 1980-07-22 | Clapp Roy A | Electromagnetically actuated shutter mechanism for cameras |
US4378146A (en) * | 1981-02-26 | 1983-03-29 | Koike Seiki Co., Ltd. | Automatic control device for controlling the iris diaphragm in an optical system |
JPS5878132A (en) * | 1981-11-04 | 1983-05-11 | Canon Inc | Aperture device driven by motor |
US4605286A (en) * | 1983-05-20 | 1986-08-12 | Canon Kabushiki Kaisha | Motor built-in lens mounting |
US4778254A (en) * | 1983-10-26 | 1988-10-18 | Gilliland Iii B David | Optic fiber shutter apparatus |
US4806813A (en) * | 1986-03-20 | 1989-02-21 | Canon Kabushiki Kaisha | Motor |
US4874233A (en) * | 1986-04-14 | 1989-10-17 | Canon Kabushiki Kaisha | Diaphragm control device for interchangeable lens |
US4881093A (en) * | 1988-04-21 | 1989-11-14 | Eastman Kodak Company | Electromagnetic shutter apparatus |
US7883280B2 (en) * | 2008-03-12 | 2011-02-08 | Va, Inc. | Shutter activation system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1444365A (en) * | 1919-08-18 | 1923-02-06 | Edward L Bowes | Electrically-actuated camera shutter |
US2973699A (en) * | 1958-07-02 | 1961-03-07 | Eastman Kodak Co | Apparatus for compensating battery decay |
US3092002A (en) * | 1960-09-23 | 1963-06-04 | Frenk Helmuth | Shutter for photographic apparatus |
US3295428A (en) * | 1964-01-10 | 1967-01-03 | Eastman Kodak Co | Photographic aperture regulating device |
DE1265573B (en) * | 1965-11-24 | 1968-04-04 | Compur Werk Gmbh & Co | Photographic shutter with drive magnet |
DE1282440B (en) * | 1967-06-28 | 1968-11-07 | Compur Werk Gmbh & Co | Photographic camera with pulse controlled shutter |
-
1970
- 1970-05-01 US US33542A patent/US3687042A/en not_active Expired - Lifetime
- 1970-05-05 DE DE7016800U patent/DE7016800U/en not_active Expired
- 1970-05-07 GB GB2202170A patent/GB1289763A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3687042A (en) | 1972-08-29 |
DE7016800U (en) | 1971-01-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PE20 | Patent expired after termination of 20 years |