GB925121A - Means of adjustment for photographic enlargers - Google Patents

Means of adjustment for photographic enlargers

Info

Publication number
GB925121A
GB925121A GB9060A GB9060A GB925121A GB 925121 A GB925121 A GB 925121A GB 9060 A GB9060 A GB 9060A GB 9060 A GB9060 A GB 9060A GB 925121 A GB925121 A GB 925121A
Authority
GB
United Kingdom
Prior art keywords
handle
column
head
boss
enlarger
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
GB9060A
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.)
Agfa Gevaert NV
Original Assignee
Agfa 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 Agfa AG filed Critical Agfa AG
Publication of GB925121A publication Critical patent/GB925121A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B27/00Photographic printing apparatus
    • G03B27/32Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52Details
    • G03B27/56Mounting enlarger head on column ; Mounting reproduction camera on column

Landscapes

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

Abstract

925,121. Photographic enlargers. AGFA A.G. Jan. 1, 1960 [Jan. 24, 1959], No. 90 /60. Class 98 (1). [Also in Group XXIV] In a photographic enlarging apparatus including an enlarger head, a support column therefor and means for moving the enlarger head with reference to the column, said means including an operating handle and a member rotatable against spring loading with reference to the column by means of the handle, the handle is pivoted to said member for independent movement against loading by an immobilizing spring for the enlarger head, and the arrangement is such that, on pivoting the handle with reference to the rotatable member, the enlarger head is freed from the column for movement with the rotatable member, on then rotating the handle and rotatable member together, the enlarger head is moved with reference to the column, and on releaseing the handle the enlarger head is immobilized in a new position and both handle and rotatable member return to their original positions. As shown (Fig. 1), the apparatus comprises an enlarger baseboard 1, a support column 3 and an enlarger head 7 adjustably supported on said column by means of a double parallelogram linkage 6. The lower arms 8, 9 (Fig. 3) of said linkage are rotatably coupled to a boss 4 (fixed on the column 3) by means of a tube 10 rigid with each arm 8 and 9 and rotatable in a bore 11 of said boss. A conical friction clutch 12 between arm 8 and boss 4 is normally held engaged by an immobilizing spring 20 attached at one end to a plate 15 and at the other end to a bolt 16 slidable within, the tube 10 but limited in its range of movement by a pin 18 passing through axial slots 19 in the tube 10 to engage an abutment surface of the boss 4. An operating handle 22 for moving the enlarger head with respect to the column is pivoted at 23 to a member 14 rotatable and axially movable on the tube 10. A forked head 24 of the handle 22 has a pin and groove coupling 26, 27 with the bolt 16. On pivoting the handle 22 in the direction 28, member 14 is first urged, by pin 23, so as to engage a conical friction clutch 13 formed between members 9 and 14 and then bolt 16 is moved axially, by pins 26, so as to remove the tension of spring 20 on boss 4, thereby releasing coupling 12, the spacing of arms 8 and 9 being slightly greater than the width of boss 4 to make this possible. The arms 8 and 9 may now be pivoted for raising or lowering the head 7 by rotation of the handle 22 in directions 29, 30. On release of the handle 22 in any position, coupling 13 is broken and coupling 12 made under action of the spring 20 and the handle 22 is rotated back to its starting position (Fig. 1) by a tension spring 31 coupled to extensions 35 and 34 respectively of members 14 and 4. The position of either one of extensions 35 and 34 may be adjusted to vary the starting position of the handle 20. The weight of the head 7 may be compensated in known manner.
GB9060A 1959-01-24 1960-01-01 Means of adjustment for photographic enlargers Expired GB925121A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA31193A DE1102550B (en) 1959-01-24 1959-01-24 Adjustment device for enlargement devices

Publications (1)

Publication Number Publication Date
GB925121A true GB925121A (en) 1963-05-01

Family

ID=6927438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9060A Expired GB925121A (en) 1959-01-24 1960-01-01 Means of adjustment for photographic enlargers

Country Status (4)

Country Link
CH (1) CH375216A (en)
DE (1) DE1102550B (en)
FR (1) FR1246499A (en)
GB (1) GB925121A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171256B (en) * 1962-07-14 1964-05-27 Walter Klatt Photographic enlarger
US4253762A (en) * 1979-11-08 1981-03-03 Barrett Walter J Photo enlarger remote focusing control

Also Published As

Publication number Publication date
FR1246499A (en) 1960-11-18
CH375216A (en) 1964-02-15
DE1102550B (en) 1961-03-16

Similar Documents

Publication Publication Date Title
ES262481A1 (en) Counterbalance mechanism
GB925121A (en) Means of adjustment for photographic enlargers
GB733603A (en) Improvements in or relating to x-ray examination tables
US2312562A (en) Photographic apparatus
US3738246A (en) Mirror shock absorber device for a camera having a quick return mirror
US2935920A (en) Interchangeable lens camera with coupled exposure meter
GB980525A (en) Improvements in or relating to projectors for projecting an indicator sign on to a screen
US2974574A (en) Photographic cameras with adjustable emulsion carrier guide
US2997934A (en) Single lens reflex camera
GB830558A (en) Constant support device
US2482629A (en) Cam operated locking means for camera focusing mechanisms
US3021158A (en) Adjusting structure for enlargers or the like
US2173237A (en) Moving picture apparatus
US2204884A (en) Film gate
GB569504A (en) Instrument mounting device
GB428505A (en) Improvements in film guiding and pressure mechanism more particularly for sound reproducing apparatus
US2613073A (en) Weighing scale
GB822071A (en) Improvements in or relating to television cameras
US3013482A (en) Camera control structure
GB726303A (en) Improvements in or relating to photographic processing and image-transfer apparatus
GB632915A (en) Improvements in and relating to x-ray apparatus
GB907301A (en) Photographic camera with built-in exposure meter
ES200731A1 (en) System of clutches for forward and reverse in apparatus of cinematography, magnetic recording and similar (Machine-translation by Google Translate, not legally binding)
GB632781A (en) Photographic enlarging apparatus with automatic focusing provision
GB1340101A (en) Translation of a sheet of material