GB530429A - Improvements in or relating to photographic cameras provided with light sensitive devices and adapted to employ interchangeable objectives - Google Patents

Improvements in or relating to photographic cameras provided with light sensitive devices and adapted to employ interchangeable objectives

Info

Publication number
GB530429A
GB530429A GB20521/39A GB2052139A GB530429A GB 530429 A GB530429 A GB 530429A GB 20521/39 A GB20521/39 A GB 20521/39A GB 2052139 A GB2052139 A GB 2052139A GB 530429 A GB530429 A GB 530429A
Authority
GB
United Kingdom
Prior art keywords
sleeve
lever
mount
photo
slot
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
GB20521/39A
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.)
Kodak Ltd
Original Assignee
Kodak Ltd
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 Kodak Ltd filed Critical Kodak Ltd
Publication of GB530429A publication Critical patent/GB530429A/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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/20—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with change of lens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/04—Frequency-transposition arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

530,429. Photo-electric control or indication of photographic exposure. KODAK, Ltd. July 14, 1939, No. 20521. Convention date, July 14, 1938. [Class 40 (iii)] [Also in Group XX] A photographic camera includes a lever which projects under spring action from the camera body through the lens opening and controls the output of a light-sensitive device, the lever being moved in a direction substantially parallel to the axis of the interchangeable lens mount by a sleeve carried by the mount and operated by the diaphragm-setting member. In the construction shown, the rotary contact arm 18 of an adjustable resistance in the circuit of a photo-electric cell 12 is operated through a rack and pinion by a spring-pressed lever 20 having an arm 24 which projects into the mount of the objective and contacts with the rear end of a sleeve 60 rotatably and longitudinally adjustable in the mount. The sleeve is rotated by a tongue 63 secured to the diaphragmadjusting ring 51 and projecting into a slot 62 in the front end of the sleeve, and a pin 46 engaging a cam slot 64 produces a corresponding longitudinal movement of the sleeve which operates the lever 20 to adjust the resistance. The sleeve 60 for adjusting the resistance in the photo-electric cell circuit is mounted in the focusing sleeve 36 and the pin 46 which engages the cam slot 64 in it is fixed to an offset ring 32 screwed on the end of the stationary ring 29. The pin 46 passes through a slot in the sleeve 36, which it thus limits to axial movements. In a modification, the sleeve 60 has rotational movement only, its rear edge being 'formed with a cam surface engaged by a lever operating an adjustable baffle which regulates the light passing to the cell, as described in Specification 521,083, [Group XX]. The meter may serve to indicate the correct adjustment of the shutter speed, or to adjust the speed automatically, as described in Specification 520,955, [Group XX].
GB20521/39A 1938-07-14 1939-07-14 Improvements in or relating to photographic cameras provided with light sensitive devices and adapted to employ interchangeable objectives Expired GB530429A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US530429XA 1938-07-14 1938-07-14

Publications (1)

Publication Number Publication Date
GB530429A true GB530429A (en) 1940-12-11

Family

ID=21981554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20521/39A Expired GB530429A (en) 1938-07-14 1939-07-14 Improvements in or relating to photographic cameras provided with light sensitive devices and adapted to employ interchangeable objectives

Country Status (1)

Country Link
GB (1) GB530429A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1096188B (en) * 1955-11-10 1960-12-29 Gauthier Gmbh A Photographic camera with lens shutter and a light meter coupled with this
DE1157909B (en) * 1954-03-06 1963-11-21 Agfa Ag Photographic camera with interchangeable lens, the aperture of which is coupled to a light meter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1157909B (en) * 1954-03-06 1963-11-21 Agfa Ag Photographic camera with interchangeable lens, the aperture of which is coupled to a light meter
DE1096188B (en) * 1955-11-10 1960-12-29 Gauthier Gmbh A Photographic camera with lens shutter and a light meter coupled with this

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