GB491157A - Improvements in or relating to photographic cameras with photo-electric exposure meters - Google Patents

Improvements in or relating to photographic cameras with photo-electric exposure meters

Info

Publication number
GB491157A
GB491157A GB5946/37A GB594637A GB491157A GB 491157 A GB491157 A GB 491157A GB 5946/37 A GB5946/37 A GB 5946/37A GB 594637 A GB594637 A GB 594637A GB 491157 A GB491157 A GB 491157A
Authority
GB
United Kingdom
Prior art keywords
pointer
lens
camera
photo
diaphragm
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
GB5946/37A
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 GB491157A publication Critical patent/GB491157A/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
    • G03B7/04—Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device, e.g. by restoring point to a fixed associated reference mark
    • G03B7/06—Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device, e.g. by restoring point to a fixed associated reference mark by a follow-up movement of an associated reference mark to the pointer

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Viewfinders (AREA)

Abstract

491,157. Photographic cameras provided with exposure meters and viewfinders. KODAK, Ltd. Feb. 27, 1937, No. 5946. Convention date, March 23, 1936. [Class 98 (i)] A photographic camera adapted to receive interchangeable objectives has a photo-electric exposure meter and a pair of indicating members, one of which is actuated by the photoelectric cell to give an indication corresponding to the intensity of light incident on the camera objective, while the other is operable by a cam on a diaphragm adjusting member associated with the objective, the diaphragm being set for correct exposure when the indicating members are coincident. As shown a kinematograph camera 1 has a lens mount 2a with focusing ring 2b. The housing 5 contains a cellular baffle and a photo-electric cell connected to the coil 10 rotatable in the field of a magnet 11. A pointer 12 on the coil shaft moves over a transparent or translucent plate 13 carrying a scale 14 of stop values. The camera has a direct vision view-finder built into the carrying handle 15. The eyepiece frame 16 has a slit 24 and a lens 17 slidable downwardly by knobs 33 guided in slots 34. An auxiliary frame 18a for the object lens 18 is pivoted at 18b at the top of the carrier 19. A prism 23 brings the pointer 12 and its scale 14. into the field of vision of the operator through the slit 24. An opening is provided in the front of the housing to illuminate the scale 14. A spring-raised pointer 25 coaxial with pointer 12 and in front of the plate 13 has an extension 27 bearing on a cam 28 integral with the diaphragm adjusting ring 29 which is operated by a knurled lug 30. The pointer 25 is kept coincident with pointer 12 to correct the diaphragm opening for existing light conditions. A mask is placed over the front of the housing 5 if a slower speed film is used. The detachable fastening for the objectives may be of the bayonet lock type. In using a telephoto lens, the view-finder object lens is swung into inoperative position and the eyepiece lens is lowered, the scene being observed through two sight openings without lenses. Each objective is provided with a suitable cam 28. Specification 395,808 is referred to.
GB5946/37A 1936-03-23 1937-02-27 Improvements in or relating to photographic cameras with photo-electric exposure meters Expired GB491157A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US491157XA 1936-03-23 1936-03-23

Publications (1)

Publication Number Publication Date
GB491157A true GB491157A (en) 1938-08-29

Family

ID=21958125

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5946/37A Expired GB491157A (en) 1936-03-23 1937-02-27 Improvements in or relating to photographic cameras with photo-electric exposure meters

Country Status (1)

Country Link
GB (1) GB491157A (en)

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