GB454812A - Improvements in and relating to photographic cameras - Google Patents

Improvements in and relating to photographic cameras

Info

Publication number
GB454812A
GB454812A GB24798/35A GB2479835A GB454812A GB 454812 A GB454812 A GB 454812A GB 24798/35 A GB24798/35 A GB 24798/35A GB 2479835 A GB2479835 A GB 2479835A GB 454812 A GB454812 A GB 454812A
Authority
GB
United Kingdom
Prior art keywords
resistance
shutter
photo
adjusting
sept
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
GB24798/35A
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon 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 Zeiss Ikon AG filed Critical Zeiss Ikon AG
Publication of GB454812A publication Critical patent/GB454812A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Accessories Of Cameras (AREA)

Abstract

454,812. Photographic cameras combined with exposure meters. ZEISS IKON AKT.-GES., 72, Schandauer Strasse, Dresden, Germany. Sept. 5, 1935 No. 24798. Convention date, Sept. 5, 1934. [Class 98 (i)] A photo-electric exposure meter with an adjustable resistance is provided on a camera having a slit shutter, and is coupled to the shutter adjusting-member through toothed wheels, so that adjustment of the shutter varies the effective value of the resistance. As shown, the photo-electric cell 7 is mounted on the camera front, and in its circuit are a resistance 5 carried by the objective mount 2 and coupled to the diaphragm adjusting- device 4 so as to rotate therewith, and a sliding contact 6 bearing on the resistance 5 and carried by a sleeve on the objective mount 2 rotatable through toothed-wheel gearing 15 .. 18 from the adjusting knob 13 of the slit shutter 14. The devices 4 and 13 are adjusted to vary the effective resistance 4 until the pointer 12 of the measuring instrument of the cell 7 coincides with a mark 11 on a scale 10. Exchangeable objectives in screw-focusing mounts, each carrying its appropriate resistance 4, may be provided, and may be secured to the front as by a bayonet fitting. The Specification as open to inspection under Sect. 91 describes also a prism plate 8 in front of the photo-electric cell. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specification 439,918.
GB24798/35A 1934-09-05 1935-09-05 Improvements in and relating to photographic cameras Expired GB454812A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE454812X 1934-09-05

Publications (1)

Publication Number Publication Date
GB454812A true GB454812A (en) 1936-10-08

Family

ID=6538964

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24798/35A Expired GB454812A (en) 1934-09-05 1935-09-05 Improvements in and relating to photographic cameras

Country Status (1)

Country Link
GB (1) GB454812A (en)

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