GB1407255A - Photographic shutter mechanism - Google Patents

Photographic shutter mechanism

Info

Publication number
GB1407255A
GB1407255A GB4259472A GB4259472A GB1407255A GB 1407255 A GB1407255 A GB 1407255A GB 4259472 A GB4259472 A GB 4259472A GB 4259472 A GB4259472 A GB 4259472A GB 1407255 A GB1407255 A GB 1407255A
Authority
GB
United Kingdom
Prior art keywords
shutter
mode
trigger circuit
lever
photo
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
GB4259472A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1407255A publication Critical patent/GB1407255A/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
    • G03B9/70—Exposure-making shutters; Diaphragms with flash-synchronising contacts
    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/081—Analogue circuits
    • G03B7/083—Analogue circuits for control of exposure time
    • 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
    • G03B9/58—Means for varying duration of "open" period of shutter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
  • Shutters For Cameras (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

1407255 Cameras EASTMAN KODAK CO 13 Sept 1972 [13 Sept 1971 (2)] 42594/72 Heading G2A A camera is operable at high illumination in a first mode in which the shutter opens for a fixed period, at lower illumination in a second mode in which a detent 61 holds the shutter open for a photo-electrically determined period and preferably at even lower illumination in a third mode in which flash is used and the detent holds the shutter open for a photo-electrically determined period adjusted according to object distance. In the first mode a trigger circuit 92 is non-conductive and hence an electromagnet 70 is switched off. When an impeller arm 56 is rotated anti-clockwise to move a shutter actuating lever 58 it allows a spring 76 to rotate an armature 68 clockwise and thereby move the detent 61 to an inoperative position in which it cannot retain the lever 58. Lever 58 is returned by springs (36, 46), Fig.1 (not shown) to close the shutter. In the second mode the trigger circuit 92 is conductive and hence electromagnet 70 is energized to hold armature 68 for a photo-electrically timed period, the dentent 61 retaining lever 58 until armature 68 is released. In the third mode trigger circuit 92 and another trigger circuit (118), Fig.7 (not shown) are conductive, the latter energizing a low light indicator lamp (97). Insertion of a flash-lamp switches a resistor (130) into the control circuit and focusing on close objects switches in a further resistor (131). Shutter operation in the third mode is otherwise the same as in the second. The lamp (97) is extinguished on shutter closure to indicate exposure termination. The shutter of Figs. 1 and 2 (not shown) is claimed in Specification 1407256.
GB4259472A 1971-09-13 1972-09-13 Photographic shutter mechanism Expired GB1407255A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17970971A 1971-09-13 1971-09-13
US17970871A 1971-09-13 1971-09-13

Publications (1)

Publication Number Publication Date
GB1407255A true GB1407255A (en) 1975-09-24

Family

ID=26875578

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4259472A Expired GB1407255A (en) 1971-09-13 1972-09-13 Photographic shutter mechanism

Country Status (5)

Country Link
JP (1) JPS4838141A (en)
DE (1) DE2244527A1 (en)
FR (1) FR2153949A5 (en)
GB (1) GB1407255A (en)
HK (1) HK24176A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4284339A (en) * 1977-12-05 1981-08-18 Agfa-Gevaert Aktiengesellschaft Programmable fully automatic shutter system for photographic cameras

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4284339A (en) * 1977-12-05 1981-08-18 Agfa-Gevaert Aktiengesellschaft Programmable fully automatic shutter system for photographic cameras

Also Published As

Publication number Publication date
HK24176A (en) 1976-05-07
JPS4838141A (en) 1973-06-05
FR2153949A5 (en) 1973-05-04
DE2244527A1 (en) 1973-03-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee