GB1289763A - photgraphic apparatus having a diaphragm and or shutter blade actuator frame - Google Patents

photgraphic apparatus having a diaphragm and or shutter blade actuator frame

Info

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
Application number
GB2202170A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Publication of GB1289763A publication Critical patent/GB1289763A/en
Expired legal-status Critical Current

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.
GB2202170A 1969-05-10 1970-05-07 photgraphic apparatus having a diaphragm and or shutter blade actuator frame Expired GB1289763A (en)

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)

* Cited by examiner, † Cited by third party
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
JPS5081139A (en) * 1973-11-16 1975-07-01
JPS5081138A (en) * 1973-11-16 1975-07-01
JPS5081137A (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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
DE7016800U (en) 1971-01-07
US3687042A (en) 1972-08-29

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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