GB668673A - Improvements in or relating to devices for varying the field seen in a view-finder for a photographic camera - Google Patents

Improvements in or relating to devices for varying the field seen in a view-finder for a photographic camera

Info

Publication number
GB668673A
GB668673A GB3594/50A GB359450A GB668673A GB 668673 A GB668673 A GB 668673A GB 3594/50 A GB3594/50 A GB 3594/50A GB 359450 A GB359450 A GB 359450A GB 668673 A GB668673 A GB 668673A
Authority
GB
United Kingdom
Prior art keywords
drum
finder
cable
lens
varying
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
GB3594/50A
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.)
Pailiard S A
Original Assignee
Pailiard S A
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 Pailiard S A filed Critical Pailiard S A
Publication of GB668673A publication Critical patent/GB668673A/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
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/02—Viewfinders

Landscapes

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

Abstract

668,673. Viewfinders for photographic cameras. PAILLARD SOC. ANON. Feb. 13, 1950 [Feb. 18, 1949], No. 3594/50. Class 98 (i). A control device for varying the field of view of a finder comprising a lens 6 in a mounting 7 movable along a guide 8, is characterized by a rotary control member driving a drum 10 around which passes a flexible connecting member 15 secured to the mounting 7 which is thereby moved along guide 8. The finder is mounted between the walls a, b of a casing, and has an objective lens 4 and an eyepiece 3 between which lens 6 moves, preferably within a tube, to vary the field visible through the finder. A control knob journalled in wall 1 of the casing drives drum 10 by direct connection, or through a gear train. A cable 15 passes round pulleys 12 mounted with their axes in a plane parallel to the optical axis c of the finder, and has its ends connected to drum 10, one end directly and the other end through a spring 14. The cable is connected to the mount 7 at e. In modifications, one end of the cable may be connected to drum 10, and the other end to a second spring- - loaded drum, the cable may be endless and pass round drum 10, or a cable passing round drum 10 may have its ends connected to mount 7. The cable ends may be connected to their points of attachment by springs, and the finder and its control device may comprise a unit readily removable from and attachable to a camera.
GB3594/50A 1949-02-18 1950-02-13 Improvements in or relating to devices for varying the field seen in a view-finder for a photographic camera Expired GB668673A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH668673X 1949-02-18

Publications (1)

Publication Number Publication Date
GB668673A true GB668673A (en) 1952-03-19

Family

ID=4527489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3594/50A Expired GB668673A (en) 1949-02-18 1950-02-13 Improvements in or relating to devices for varying the field seen in a view-finder for a photographic camera

Country Status (1)

Country Link
GB (1) GB668673A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200699A (en) * 1959-11-23 1965-08-17 Bell & Howell Co Camera zoom objective and zoom viewfinder with flexible cable coupling
US4136939A (en) * 1976-10-08 1979-01-30 Nihon Beru-Haueru Kabushiki Kaisha (Bell & Howell Japan, Ltd.) Rangefinding optical system
GB2190514A (en) * 1986-05-16 1987-11-18 William Penton Nathan Optical device having a radially adjustable lens
US4806006A (en) * 1986-05-16 1989-02-21 Nathan William P Optical device with receiving means adjustable to view different portions of an image

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200699A (en) * 1959-11-23 1965-08-17 Bell & Howell Co Camera zoom objective and zoom viewfinder with flexible cable coupling
US4136939A (en) * 1976-10-08 1979-01-30 Nihon Beru-Haueru Kabushiki Kaisha (Bell & Howell Japan, Ltd.) Rangefinding optical system
GB2190514A (en) * 1986-05-16 1987-11-18 William Penton Nathan Optical device having a radially adjustable lens
US4806006A (en) * 1986-05-16 1989-02-21 Nathan William P Optical device with receiving means adjustable to view different portions of an image
GB2190514B (en) * 1986-05-16 1989-12-13 William Penton Nathan Optical device having a radially adjustable lens

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