GB225825A - Improvements in photographic cameras - Google Patents

Improvements in photographic cameras

Info

Publication number
GB225825A
GB225825A GB24693/24A GB2469324A GB225825A GB 225825 A GB225825 A GB 225825A GB 24693/24 A GB24693/24 A GB 24693/24A GB 2469324 A GB2469324 A GB 2469324A GB 225825 A GB225825 A GB 225825A
Authority
GB
United Kingdom
Prior art keywords
focusing
plate
strip
shutter
elements
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
GB24693/24A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB225825A publication Critical patent/GB225825A/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
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/44—Means for exchanging focusing screen and light sensitive material

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Blocking Light For Cameras (AREA)

Abstract

225,825. Brunner, A. Dec. 8, 1923, [Convention date]. Focusing-devices.-The camera back A supports the sensitive plate B, and a strip of ground glass C for focusing protected by an external hood D. One element F of a roller-blind shutter covers the plate but exposes the strip C during focusing. On releasing the shutter to expose the plate, first the strip C is covered by the element F, then the exposure slit between the elements F, G traverses the plate, and the elements are arrested so that the upper extremity of the element F and the lower extremity of the element G rest at the lower edge of the sensitive plate. The objective may be displaced laterally by a lever system to bring successive portions of the picture upon the focusing-strip C. The Specification as open to inspection under Sect. 91 (3) (a) also describes t'he use of the focusing-strip in a camera having a lens shutter, in which case the plate B is kept covered during focusing, and the hood D is closed during exposure. This subject-matter does not appear in the Specificatiop as accepted.
GB24693/24A 1923-12-08 1924-10-17 Improvements in photographic cameras Expired GB225825A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR225825X 1923-12-08

Publications (1)

Publication Number Publication Date
GB225825A true GB225825A (en) 1925-04-30

Family

ID=8881951

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24693/24A Expired GB225825A (en) 1923-12-08 1924-10-17 Improvements in photographic cameras

Country Status (1)

Country Link
GB (1) GB225825A (en)

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