GB708506A - Improvements in or relating to film feeding apparatus - Google Patents
Improvements in or relating to film feeding apparatusInfo
- 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
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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/28—Locating light-sensitive material within camera
- G03B17/30—Locating spools or other rotatable holders of coiled film
- G03B17/305—Locating 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.
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)
| 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 |
-
1952
- 1952-10-16 GB GB25976/52A patent/GB708506A/en not_active Expired
Cited By (9)
| 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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