GB451953A - Improvements in or relating to photographic shutters having associated delay action mechanism - Google Patents

Improvements in or relating to photographic shutters having associated delay action mechanism

Info

Publication number
GB451953A
GB451953A GB4662/35A GB466235A GB451953A GB 451953 A GB451953 A GB 451953A GB 4662/35 A GB4662/35 A GB 4662/35A GB 466235 A GB466235 A GB 466235A GB 451953 A GB451953 A GB 451953A
Authority
GB
United Kingdom
Prior art keywords
lever
spring
shutter
shoulder
action mechanism
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
GB4662/35A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB451953A publication Critical patent/GB451953A/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
    • G03B9/10—Blade or disc rotating or pivoting about axis normal to its plane
    • G03B9/18—More than two members
    • G03B9/22—More than two members each moving in one direction to open and then in opposite direction to close, e.g. iris type

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Shutters For Cameras (AREA)

Abstract

451,953. Photographic shutters. I. G. FARBENINDUSTRIE AKT.-GES., Frankfort-on-Main, Germany. Feb. 13, 1935, No. 4662. Convention date, Feb. 13, 1934. [Class 98 (i)] Delay-action mechanism for a shutter comprises a driving spring and adjustment lever connected through a friction clutch with the clockwork mechanism of the shutter. The lever 3 fits on a square spindle 6 and has a bore 7 in which the end 8<a> of the friction spring 8 fits. The other end of the spring 8 presses against the inner periphery of a toothed wheel 9 which is connected to toothed wheels 10, 11 of the delay-action mechanism. The tension spring 12 is attached to the notched end 6a of the shaft 6. A lever 14 is pivoted at 14d and is forced by a spring 19 so that its arm 14e engages the semicircular shoulder 13 on the spindle of the actuating lever 3. When the lever 3 is moved, the lever 14 is released and the noses 74a, 14b move to engage with the release lever 15 of the shutter and a crescent-shaped shoulder 16 on the shutter blade 18 respectively. The lever 3 returns slowly under the action of the spring 12 and the shoulder 13 rotates the lever 14 about its pivot to release the shoulders 16, 15a and allow the shutter to operate. A projection 14c simultaneously stops the escapement 20, 21 of the clockwork mechanism.
GB4662/35A 1934-02-13 1935-02-13 Improvements in or relating to photographic shutters having associated delay action mechanism Expired GB451953A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE451953X 1934-02-13

Publications (1)

Publication Number Publication Date
GB451953A true GB451953A (en) 1936-08-13

Family

ID=6538581

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4662/35A Expired GB451953A (en) 1934-02-13 1935-02-13 Improvements in or relating to photographic shutters having associated delay action mechanism

Country Status (1)

Country Link
GB (1) GB451953A (en)

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