GB708506A - Improvements in or relating to film feeding apparatus - Google Patents

Improvements in or relating to film feeding apparatus

Info

Publication number
GB708506A
GB708506A GB25976/52A GB2597652A GB708506A GB 708506 A GB708506 A GB 708506A GB 25976/52 A GB25976/52 A GB 25976/52A GB 2597652 A GB2597652 A GB 2597652A GB 708506 A GB708506 A GB 708506A
Authority
GB
United Kingdom
Prior art keywords
film
spool
shaft
ratchet
pawl
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
GB25976/52A
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.)
Kodak Ltd
Original Assignee
Kodak Ltd
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 Kodak Ltd filed Critical Kodak Ltd
Publication of GB708506A publication Critical patent/GB708506A/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
    • G03B17/00Details of cameras or camera bodies; Accessories therefor
    • G03B17/28Locating light-sensitive material within camera
    • G03B17/30Locating spools or other rotatable holders of coiled film
    • G03B17/305Locating spools or other rotatable holders of coiled film for roll film cameras

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)

Abstract

708,506. Film-feeding apparatus. KODAK, Ltd. Oct. 16, 1952 [Oct. 20, 1951], No. 25976/52. Classes 97(1) and 98(1) A film-feeding apparatus comprising a chamber for receiving 'a spool of film and from which the film is extruded through a guideway, is provided with a member which is spring- urged into engagement with the underside of the film where it leaves the spool and, as the film is unwound, is forced radially inwards towards the centre of the spool, the said member being linked to a pawl in such a way that the latter engages a ratchet on the spool shaft after a predetermined amount of unwinding and prevents further turning of the spool shaft. As shown, the spool chamber 4 of an extrusion type camera contains a spool of film inserted on the shaft 9, to which shaft are keyed a ratchet 16 and a winding knob 10. The spool flanges 15 and 18 have inwardly projecting beads 33 at their circumference, so that the film F is bowed transversely as it leaves the spool. A film-engaging member 20 is mounted on a shaft 25 and is connected to a pawl 22, also mounted on shaft 25 by an arm 21. A spring 25<SP>1</SP> tends to turn the member 20 in the direction of the arrow B, thus pressing the finger 30 into engagement with the underside of the film and at the same time tends to move the pawl 22 away from the ratchet 16. When the spool of film is inserted into the chamber and the knob 10 rotated so as to turn the spool in the direction of the arrow A, the finger 30 engages the underside of the leading edge of the film and releases it from the flange beads of the spool. As the spool of film is unwound, the film passes through the guideway 37, 38 and is extruded into a take up chamber (not shown) where it forms loose convolutions, and the film forces the member 20 radially inwards towards the centre of the spool against the action of the spring 25'. At the same time the pawl 22 approaches the ratchet 16 and after a given amount of unwinding engages the ratchet and prevents further turning of the spool shaft. The device can be used in projection apparatus.
GB25976/52A 1951-10-20 1952-10-16 Improvements in or relating to film feeding apparatus Expired GB708506A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US708506XA 1951-10-20 1951-10-20

Publications (1)

Publication Number Publication Date
GB708506A true GB708506A (en) 1954-05-05

Family

ID=22097768

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25976/52A Expired GB708506A (en) 1951-10-20 1952-10-16 Improvements in or relating to film feeding apparatus

Country Status (1)

Country Link
GB (1) GB708506A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5590645A (en) * 1990-03-02 1997-01-07 Glaxo Group Limited Inhalation device
GB2346704A (en) * 1999-02-12 2000-08-16 Todd Nai Yin Ho Loading and winding a camera
US6536427B2 (en) 1990-03-02 2003-03-25 Glaxo Group Limited Inhalation device
US6792945B2 (en) 1990-03-02 2004-09-21 Glaxo Group Limited Inhalation device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5590645A (en) * 1990-03-02 1997-01-07 Glaxo Group Limited Inhalation device
US5860419A (en) * 1990-03-02 1999-01-19 Glaxo Group Limited Inhalation device
US5873360A (en) * 1990-03-02 1999-02-23 Glaxo Group Limited Inhalation device
US6032666A (en) * 1990-03-02 2000-03-07 Glaxo Group Limited Inhalation device
US6536427B2 (en) 1990-03-02 2003-03-25 Glaxo Group Limited Inhalation device
US6792945B2 (en) 1990-03-02 2004-09-21 Glaxo Group Limited Inhalation device
GB2346704A (en) * 1999-02-12 2000-08-16 Todd Nai Yin Ho Loading and winding a camera
US6176625B1 (en) 1999-02-12 2001-01-23 Nai Yin Todd Ho Camera and a method of loading a camera
GB2346704B (en) * 1999-02-12 2001-05-30 Todd Nai Yin Ho A camera and method of loading a camera

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