GB1304338A - - Google Patents

Info

Publication number
GB1304338A
GB1304338A GB2755671A GB2755671A GB1304338A GB 1304338 A GB1304338 A GB 1304338A GB 2755671 A GB2755671 A GB 2755671A GB 2755671 A GB2755671 A GB 2755671A GB 1304338 A GB1304338 A GB 1304338A
Authority
GB
United Kingdom
Prior art keywords
coil
cylindrical member
blades
core
blade
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
GB2755671A
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
Priority claimed from DE19702031565 external-priority patent/DE2031565C3/en
Priority claimed from DE19712119609 external-priority patent/DE2119609C3/en
Application filed filed Critical
Publication of GB1304338A publication Critical patent/GB1304338A/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
    • G03B9/08—Shutters
    • 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)

Abstract

1304338 Photographic shutters and diaphragms FRANKE & HEIDECKE GmbH [trading as ROLLEIWERKE FRANKE & HEIDECKE] 11 June 1971 [26 June 1970 22 April 1971] 27556/71 Heading G2A Shutter or diaphragm blades are connected to an electromagnet blade drive mechanism which includes a magnetic assembly comprising a hollow cylindrical member 1 closed at one end and a cylindrical core member 2 located within the cylindrical member to define a gap 5 therebetween and a cylindrical coil 4 which is movable coaxially with the core 2 in the gap 5, the cylindrical member having at least a part of its internal diameter substantially identical to the external diameter of the coil and the over-all axial length of the coil corresponding to the depth of the cylindrical member and to the length of movement of the coil. The core 2 consists of a permanent magnet. Preferably the drive has two coils 4, 7 and two pot-shaped magnets 1, 6, the first system drives in direction A whilst the second drives in direction B. The coils are interconnected by a ring 8 which is coupled to a blade ring 11 via a pin and slot coupling 9, 10. The blades may be directly coupled to the pin 10, Fig. 3, (not shown). The blades may move in a rectilinear direction, Fig. 4 (not shown). In a further embodiment, Fig. 5, (not shown), the axis of the coil and the pot-shaped magnet follows a circular path about the axis of a blade which is rigidly coupledto the coil. At the end of the opening stroke, the coil structure may engage resilient members which store the kinetic energy of the mechanism and assist in obtaining short exposure times. The drive mechanism may be mechanically prestressed to the open position and by regulating the current through the coil a pre-selected aperture may be obtained via an exposure regulating device or a manual device.
GB2755671A 1970-06-26 1971-06-11 Expired GB1304338A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702031565 DE2031565C3 (en) 1970-06-26 1970-06-26 Electromagnetic lamellar drive on photographic lens closures
DE19712119609 DE2119609C3 (en) 1971-04-22 1971-04-22 Electromagnetic blade drive on photographic lens shutters

Publications (1)

Publication Number Publication Date
GB1304338A true GB1304338A (en) 1973-01-24

Family

ID=25759341

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2755671A Expired GB1304338A (en) 1970-06-26 1971-06-11

Country Status (3)

Country Link
US (1) US3724350A (en)
JP (2) JPS52167040U (en)
GB (1) GB1304338A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132782A (en) * 1982-12-23 1984-07-11 Konishiroku Photo Ind Electromagnetically driven shutter device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804506A (en) * 1973-05-21 1974-04-16 Nasa Rotary solenoid shutter drive assembly and rotary inertia damper and stop plate assembly
JPS5528086A (en) * 1978-08-22 1980-02-28 Canon Inc Electromagnetically driven shutter device
US4213689A (en) * 1979-03-22 1980-07-22 Clapp Roy A Electromagnetically actuated shutter mechanism for cameras
JPS55149923A (en) * 1979-05-10 1980-11-21 Canon Inc Electromagnetically driven shutter
DE19832244C2 (en) * 1998-07-17 2000-10-19 Rollei Fototechnic Gmbh Electromagnetic drive for a slot lock

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056341A (en) * 1958-05-15 1962-10-02 Polaroid Corp Photographic shutter mechanism
US2973699A (en) * 1958-07-02 1961-03-07 Eastman Kodak Co Apparatus for compensating battery decay
US3082674A (en) * 1958-09-11 1963-03-26 Bell & Howell Co Automatic exposure mechanism with magnetic control of iris blades
US3095795A (en) * 1960-06-08 1963-07-02 Barnes Eng Co Camera shutter
US3295428A (en) * 1964-01-10 1967-01-03 Eastman Kodak Co Photographic aperture regulating device
DE1447470A1 (en) * 1964-04-16 1969-03-20 Compur Werk Gmbh & Co Photographic camera with electromagnetic shutter actuation
US3295429A (en) * 1964-05-12 1967-01-03 Eastman Kodak Co Electromagnetic relay exposure controls
DE1265573B (en) * 1965-11-24 1968-04-04 Compur Werk Gmbh & Co Photographic shutter with drive magnet
DE1279454B (en) * 1966-01-29 1968-10-03 Prontor Werk Gauthier Gmbh Photographic shutter with at least two shutter blades, each pivoted on a pivot
US3405624A (en) * 1966-05-18 1968-10-15 Eastman Kodak Co Photographic shutter
US3498194A (en) * 1967-09-15 1970-03-03 Polaroid Corp Camera exposure apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132782A (en) * 1982-12-23 1984-07-11 Konishiroku Photo Ind Electromagnetically driven shutter device

Also Published As

Publication number Publication date
JPS57178226U (en) 1982-11-11
US3724350A (en) 1973-04-03
JPS6111700Y2 (en) 1986-04-12
JPS52167040U (en) 1977-12-17

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Legal Events

Date Code Title Description
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429D Case decided by the comptroller ** specification amended (sect. 29/1949)
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee