GB506749A - Improvements in focussing mechanisms for the lenses in photographic apparatus - Google Patents

Improvements in focussing mechanisms for the lenses in photographic apparatus

Info

Publication number
GB506749A
GB506749A GB33400/37A GB3340037A GB506749A GB 506749 A GB506749 A GB 506749A GB 33400/37 A GB33400/37 A GB 33400/37A GB 3340037 A GB3340037 A GB 3340037A GB 506749 A GB506749 A GB 506749A
Authority
GB
United Kingdom
Prior art keywords
disc
dec
attached
bevel gear
lenses
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
GB33400/37A
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.)
VALSTS ELEKTROTECHNISKA FABRIK
Original Assignee
VALSTS ELEKTROTECHNISKA FABRIK
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 VALSTS ELEKTROTECHNISKA FABRIK filed Critical VALSTS ELEKTROTECHNISKA FABRIK
Publication of GB506749A publication Critical patent/GB506749A/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
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lens Barrels (AREA)

Abstract

506,749. Photographic lens mounts. VALSTS ELEKTROTECHNISKA FABRIKA. Dec. 2, 1937, No. 33400. Convention date, Dec. 24, 1936. [Class 98 (i)] Focusing mechanism for photographic objectives comprises a lens holder, which is screw-threaded at 3 on the main casing 1, and which has bevel gear teeth 4 which are in engagement with a similar bevel gear wheel 6 attached to the adjustment disc 5. The teeth 4 are arranged on a helical line of the same pitch as the screw thread 3 so that the bevel wheels are always in close engagement. The disc 5 is mounted upon a cylindrical stud 6a which is attached to the wheel 6. An exposure-counting disc 7 is also freely mounted on the stud 6a.
GB33400/37A 1936-12-24 1937-12-02 Improvements in focussing mechanisms for the lenses in photographic apparatus Expired GB506749A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI506749X 1936-12-24

Publications (1)

Publication Number Publication Date
GB506749A true GB506749A (en) 1939-06-02

Family

ID=8556143

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33400/37A Expired GB506749A (en) 1936-12-24 1937-12-02 Improvements in focussing mechanisms for the lenses in photographic apparatus

Country Status (1)

Country Link
GB (1) GB506749A (en)

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