GB924668A - Improvements in or relating to photographic shutters - Google Patents

Improvements in or relating to photographic shutters

Info

Publication number
GB924668A
GB924668A GB478361A GB478361A GB924668A GB 924668 A GB924668 A GB 924668A GB 478361 A GB478361 A GB 478361A GB 478361 A GB478361 A GB 478361A GB 924668 A GB924668 A GB 924668A
Authority
GB
United Kingdom
Prior art keywords
actuator
spring
cam
release
additional spring
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
GB478361A
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.)
Hittech Prontor GmbH
Original Assignee
Alfred Gauthier GmbH
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 to DEG29140A priority Critical patent/DE1099343B/en
Application filed by Alfred Gauthier GmbH filed Critical Alfred Gauthier GmbH
Publication of GB924668A publication Critical patent/GB924668A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B9/00Exposure-making shutters; Diaphragms
    • G03B9/08Shutters
    • G03B9/10Blade or disc rotating or pivoting about axis normal to its plane
    • G03B9/18More than two members
    • G03B9/22More than two members each moving in one direction to open and then in opposite direction to close, e.g. iris type
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B9/00Exposure-making shutters; Diaphragms
    • G03B9/58Means for varying duration of "open" period of shutter

Abstract

924,668. Photographic shutters. ALFRED GAUTHIER G.m.b.H. Feb. 9, 1961 [March 2, 1960], No. 4783/61. Class 98 (1). In a photographic shutter including a latch device-as at 29, 32-a retaining device-as at 23-and a driving part-as at 4-having a main spring-as at 5-and an additional spring- as at 6-urgingly connected to a rotatable member-as at 10-the retaining device is arranged to retain the rotatable member in a position in which the additional spring has maximum tension (cf. Fig. 1) and, when actuated by the shutter release (not shown), to release the rotatable member before the driving part is released from the cocked state thereof, and the rotatable member is arranged to rotate after release into a predetermined position defined by a settable cam-as at 34a-the latch device including a latch-as at 29-one end of which is pivotally connected to one end of an actuator-as at 32a-the other end of which actuator is adapted to arrest the rotatable member in the predetermined position, the actuator having a stop pin-as at 340- arranged to make contact with the setting cam and to serve as a fulcrum about which the actuator is pivotable by the action of the additional spring upon the rotatable member, such pivotal movement causing the free end of the latch to release the driving part and the actuator to contact a stationary stop-as at 41-preventing further movement of the actuator. The tension of the additional spring is thus adjusted prior to each exposure to correspond to the setting of the cam 34a. The main driving part 4 is coupled to a blade driving ring 16 through a spring-urged pawl 13 pivoted on the part 4 and engaging with a pin 15 on the ring 16. The additional spring 6 is wound around a bushing 9 on the cocking shaft 3 of the part 4, one end of the spring being fixed to an abutment 10a of the member 10 and the other end engaging a turned-up portion 4a of the disc 4. The cam 34a is formed in an exposure time setting member 34 which also carries a cam 34b (Figs. 9 and 10-not shown) for co-operation with a conventional gear retard mechanism (not shown) co-operating in known manner with the lug 4a of the part 4 for supplementing the control effect of the additional spring 6. The shutter operates as follows, starting from the cocked position of Fig. 1. On pivoting a spring- urged release lever 20 (coupled to a body release lever by means not shown) in the anticlockwise direction about its fixed pivot 21, a spring- urged retaining lever 23 is pivoted by a link 26 in the anticlockwise direction about its fixed pivot 24, whereby the member 10 is freed to rotate in the anticlockwise direction under loading of the additional spring 6. Rotation of member 10 is followed by actuator 32 which has a forked end 32a engaging over a pin 33 on the member 10-until the stop pin 340 thereon engages with one of the steps of the cam 34a. Rotation of the actuator about pivot 40 then stops, but the actuator continues to rotate about the pin 340 until its pivot 40 engages the stationary stop 41. During this last rotation, latch 29 (which is connected to actuator 32 at 40) is pivoted so as to release projection 4b of the part 4 for exposure. Near the end of the running down of the disc 4, portion 4a thereof collects projection 10b of member 10 and moves it into its initial position ready for the next exposure.
GB478361A 1960-03-02 1961-02-09 Improvements in or relating to photographic shutters Expired GB924668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG29140A DE1099343B (en) 1960-03-02 1960-03-02 Photographic shutter

Publications (1)

Publication Number Publication Date
GB924668A true GB924668A (en) 1963-05-01

Family

ID=7123652

Family Applications (1)

Application Number Title Priority Date Filing Date
GB478361A Expired GB924668A (en) 1960-03-02 1961-02-09 Improvements in or relating to photographic shutters

Country Status (2)

Country Link
DE (1) DE1099343B (en)
GB (1) GB924668A (en)

Also Published As

Publication number Publication date
DE1099343B (en) 1961-02-09

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