GB519181A - Driving mechanism for operating photographic contact printing machines - Google Patents

Driving mechanism for operating photographic contact printing machines

Info

Publication number
GB519181A
GB519181A GB2689538A GB2689538A GB519181A GB 519181 A GB519181 A GB 519181A GB 2689538 A GB2689538 A GB 2689538A GB 2689538 A GB2689538 A GB 2689538A GB 519181 A GB519181 A GB 519181A
Authority
GB
United Kingdom
Prior art keywords
shaft
disc
friction disc
drive
friction
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
GB2689538A
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
Priority to GB2689538A priority Critical patent/GB519181A/en
Publication of GB519181A publication Critical patent/GB519181A/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
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/18—Maintaining or producing contact pressure between original and light-sensitive material
    • G03B27/22—Maintaining or producing contact pressure between original and light-sensitive material by stretching over a curved surface

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection-Type Copiers In General (AREA)
  • Friction Gearing (AREA)

Abstract

519,181. Photographic contact - printing apparatus. MORSE, S. H. Sept. 15, 1938, No. 26895. [Class 98 (ii)] Variable speed driving mechanism for contact-printing apparatus comprises a friction disc connected with the source of power, for example an electric motor, and a friction disc at rightangles to the first-mentioned disc engaging with its peripheral edge the plane surface of the firstmentioned disc, the second-mentioned disc being mounted upon a shaft 'transmitting through gearing the drive to the part of the apparatus to be driven, the second-mentioned disc being held against the face of the first-mentioned disc by the load applied to the shaft or shafts. As shown, the plane surface of the friction disc e mounted on the shaft d of an electric motor c is engaged by the peripheral edge of a friction disc f keyed to and slidable on the shaft g carrying a pulley t transmitting the drive through a belt a, a second pulley v, reduction gearing w, and a chain or belt to the rollers carrying the endless band or bands drawing the sensitive material and tracings round the outside of an internally illuminated glass drum. One end of a fork l engages a grooved collar n secured to the disc f and the other end is supported on a guide rod o. The centre is secured to a rod m provided at one end with a toothed rack p engaged by a pinion q on a rod r provided with a knob s, rotation of which accordingly varies the speed and alters the direction of the drive. A shaft 4 driven from the pulley 6 on the motor shaft d carries pulleys 9 driving fans mounted in the ends of the glass drum through belts. The bearing h<1> for the shaft g can move slightly by reason of the slots j and the pull of the driving belt u moves the shaft g to pull the friction disc f against the face of the friction disc a. The driving mechanism may also be applied to apparatus of the kind in which both the band and the glass drum are rotated. A second friction drive on a doubleshafted motor may be provided for twin contact-printing machines.
GB2689538A 1938-09-15 1938-09-15 Driving mechanism for operating photographic contact printing machines Expired GB519181A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2689538A GB519181A (en) 1938-09-15 1938-09-15 Driving mechanism for operating photographic contact printing machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2689538A GB519181A (en) 1938-09-15 1938-09-15 Driving mechanism for operating photographic contact printing machines

Publications (1)

Publication Number Publication Date
GB519181A true GB519181A (en) 1940-03-19

Family

ID=10250887

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2689538A Expired GB519181A (en) 1938-09-15 1938-09-15 Driving mechanism for operating photographic contact printing machines

Country Status (1)

Country Link
GB (1) GB519181A (en)

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