GB655589A - Improvements in or relating to slide-changing devices for optical projection apparatus - Google Patents
Improvements in or relating to slide-changing devices for optical projection apparatusInfo
- Publication number
- GB655589A GB655589A GB23852/48A GB2385248A GB655589A GB 655589 A GB655589 A GB 655589A GB 23852/48 A GB23852/48 A GB 23852/48A GB 2385248 A GB2385248 A GB 2385248A GB 655589 A GB655589 A GB 655589A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slide
- magazine
- plate
- slides
- fingers
- 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
- G03B23/00—Devices for changing pictures in viewing apparatus or projectors
- G03B23/02—Devices for changing pictures in viewing apparatus or projectors in which a picture is removed from a stock and returned to the same stock or another one; Magazines therefor
- G03B23/04—Devices for changing pictures in viewing apparatus or projectors in which a picture is removed from a stock and returned to the same stock or another one; Magazines therefor with linear movement
- G03B23/048—Devices for changing pictures in viewing apparatus or projectors in which a picture is removed from a stock and returned to the same stock or another one; Magazines therefor with linear movement with horizontally sliding mechanism
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
655,589. Optical - projection apparatus. KODAK, Ltd. Sept. 10, 1948, No. 23852. Convention date, Sept. 24, 1947. [Class 97 (i)] A slide-changing device for use with optical projection apparatus comprises a plate formed with an aperture in registry with which a slide is positioned during projection and carrying a supply magazine for the slides, a slide-changing member reciprocally mounted on the plate at the front end of the magazine to engage an edge of the front slide therein for moving said slide out of the magazine and into the projection position, and slide-separating means for preventing the removal of more than one slide at a time from the magazine upon each reciprocation of the slide-changing member, said means comprising a member carried by the plate adjacent the front end of the magazine and extending across and normally partially blocking the exit opening of the latter so as to be displaced by the slide as it is moved to the projection position by the slide-changing member. As shown in Fig. 3, a plate 15 is formed with the projection aperture. To this plate are attached magazines 17, 18 from and to which the slides are fed spring-pressed members 22, 36 act on the slides therein. The slides are fed successively by reciprocating a plate 19 lying behind the plate 15. The plate 19 has an aperture, in which engages the front slide in the magazine 18 whereby the slide is pushed across to the projection aperture. Reverse movement of the plate 19 retracts the slide. The device shown in Fig. 9 ensures that, after projection, the slide is fed to the magazine 18. It is springy and secured to the rear face of the plate 15 with the fingers 29 extending across the mouth of the magazine 17. As a slide is fed from the magazine it straightens the curved ends 30 of the fingers 29, Fig. 11, until the trailing edge of the slide passes the ends of the fingers. When retracted the slide is thus guided on the front faces of the fingers 29. Since this movement involves inclination of the slide to the planes of the plate 19, the edge 38 of the aperture therein is thickened, so as to remain in contact with the slide by a tongue 39, seen in section in Fig. 4, struck slightly upwards therefrom. The aperture, at the side of the magazine, from which the slides emerge is almost completely blocked by a resilient member 53 which is pushed aside by each slide, to an extent depending on the thickness of the slide. The member 53 is one limb of an L-shaped member, the other limb 51 of which is secured to the base portion 49 of a spring member as shown in Fig. 8. This base portion carries ears 57 and terminates in fingers 45 attached at 46 to the plate 15. If the member 53 is deflected far the end portion 55 engages the ears 57, whereby the fingers 45 are also caused to yield. Spring fingers 48 which engage the slide in the projection aperture also form part of the member. The spring-pressed member 36 acting on the slides in the take-up magazine is inclined as shown in Fig. 3 to assist entry of slides into the magazine.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US655589XA | 1947-09-24 | 1947-09-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB655589A true GB655589A (en) | 1951-07-25 |
Family
ID=22063548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB23852/48A Expired GB655589A (en) | 1947-09-24 | 1948-09-10 | Improvements in or relating to slide-changing devices for optical projection apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB655589A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3809470A (en) * | 1970-06-05 | 1974-05-07 | Besancenot Serge | Projector |
-
1948
- 1948-09-10 GB GB23852/48A patent/GB655589A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3809470A (en) * | 1970-06-05 | 1974-05-07 | Besancenot Serge | Projector |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3643649A (en) | Mechanized tracheotome | |
GB655589A (en) | Improvements in or relating to slide-changing devices for optical projection apparatus | |
US3205801A (en) | Camera for flash photography | |
GB1446240A (en) | Photographic camera | |
US1904193A (en) | Package holder | |
GB1343723A (en) | Cartridge for strip roll and strip feeding apparatus | |
GB510358A (en) | Improvements in and relating to holders or carriers for keys | |
US2364788A (en) | Slide changing device | |
GB458803A (en) | Pencil with a plurality of shiftable lead holders | |
US2281926A (en) | Razor | |
GB1044584A (en) | Flash light unit | |
US2630567A (en) | Device for feeding nails in position for manual driving | |
GB753968A (en) | Improvements relating to suction cleaners | |
SU103864A1 (en) | Tool for cutting the tabs in the mouthpiece tape on the sleeve machines | |
GB1353494A (en) | Cameras | |
GB765057A (en) | Improvements in stapling machines | |
GB727521A (en) | Optical projection apparatus | |
GB647179A (en) | Improvements in stapling machines | |
GB1283853A (en) | Photographic camera | |
GB1413009A (en) | Photographic slide-projectors | |
FR2272365A1 (en) | Trigger mechanism for underwater harpoon gun - has lug at end of harpoon freed from pocket between pivot arms when trigger pulled | |
GB495286A (en) | Improvements in or relating to intermittent film advancing mechanism for motion picture apparatus | |
GB980848A (en) | Slide changing device for still picture projector | |
GB615998A (en) | Improvements in or relating to motion picture projectors | |
GB820746A (en) | Improvements in or relating to an optical slide projector |