GB990683A - Magazine-type transparency slide projector - Google Patents
Magazine-type transparency slide projectorInfo
- Publication number
- GB990683A GB990683A GB4542861A GB4542861A GB990683A GB 990683 A GB990683 A GB 990683A GB 4542861 A GB4542861 A GB 4542861A GB 4542861 A GB4542861 A GB 4542861A GB 990683 A GB990683 A GB 990683A
- Authority
- GB
- United Kingdom
- Prior art keywords
- masks
- pinion
- slides
- lever
- slide
- 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
-
- 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
- G03B23/046—Picture changing devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
990,683. Magazine-type slide projectors. FRANKE & HEIDECKE G.m.b.H., [trading as ROLLEIWERKE FRANKE & HEIDECKE]. Dec. 19,1961 [Dec. 22,1960], No. 45428/61. Addition to 965,558. Heading G2J. In an improvement in or modification of the magazine-type slide projector disclosed in the parent Specification in which two magazines movable in parallel guideways on opposite sides of the projector are provided for slides of different formats,a pair of pivoted masks located in the path of the projection light beam are arranged to be opened only when a slide is located in one or other of the two alternative projection positions. In the projector of the parent, two slide changing claws 17,18 are provided for slides of two different sizes, these claws being respectively slidable transversely of the optical axis on rods 19, 20 and being driven in feed and return movements by driving means (not shown) through links 28, 29, a double armed lever 27, a pinion 26, a reciprocating rack 24 and a cam 22 on a driving shaft 21. A knob 23 is provided for manual control. A pair of masks 34, 35 are now provided pivoted respectively about vertical axes 32, 33 and linked by a member 35c. The masks are urged towards their open positions by a spring 38 acting on a lever 36 fixed relative to mark 34 but are normally held closed by a pin 39 on the lever 36 engaging in a cam groove 40 rigid with a pinion 41 meshing with a further pinion 30 on the driving shaft 21. The pinion 41 rotates twice for each rotation of the pinion 30. A radially enlarged portion 42 of the groove 40 is arranged so that when the claws 17 and 18 are in their projection positions (and also in their outermost positions) the pin 39 is released for opening of the masks 34, 35. Opening of the masks, however, is prevented unless a slide is correctly positioned in one or other of the two gates by a latching device comprising sliding members 49, 50 having lugs 62,63 engageable by properly positioned slides and a spring-urged lever 45 which is coupled to the members 49, 50 by arms 47,48 and has a lug 43 normally positioned in the path of movement of the lever 36. The slides may be provided with three rounded or recessed corners and only one square one so that the lugs 62,63 can only be engaged by properly oriented slides. The masks 34,35 may be provided with notches thereby forming a central hole 72 when closed so as to reduce eyestrain caused by continual changes from light to dark on the screen. The hole 72 may also serve as a pin-hole objective for producing an image of the lamp filament on the screen for facilitating positioning of the sources. The projection lens would be removed for this. Alternatively the projection lens may be retained and the positioning effected with reference to an image produced on a frosted glass screen held in front of the projection lens (cf. Fig. 4 not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF32820A DE1224530B (en) | 1960-12-22 | 1960-12-22 | Magazine still projector |
Publications (1)
Publication Number | Publication Date |
---|---|
GB990683A true GB990683A (en) | 1965-04-28 |
Family
ID=7094806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4542861A Expired GB990683A (en) | 1960-12-22 | 1961-12-19 | Magazine-type transparency slide projector |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1224530B (en) |
GB (1) | GB990683A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0010554A1 (en) * | 1978-11-02 | 1980-05-14 | Rollei-Werke Franke & Heidecke GmbH + Co KG | Device for optically suppressing the motion of picture changes in projecting apparatuses |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1035931B (en) * | 1956-10-16 | 1958-08-07 | Erich Zillmer | Image change slide with two image holders that can be pushed alternately into the image stage and control means for a cover panel that can be moved in the direction of the optical axis |
DE1093515B (en) * | 1960-04-23 | 1960-11-24 | Koch & Sterzel Kommanditgesell | X-ray examination device |
-
1960
- 1960-12-22 DE DEF32820A patent/DE1224530B/en active Pending
-
1961
- 1961-12-19 GB GB4542861A patent/GB990683A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0010554A1 (en) * | 1978-11-02 | 1980-05-14 | Rollei-Werke Franke & Heidecke GmbH + Co KG | Device for optically suppressing the motion of picture changes in projecting apparatuses |
Also Published As
Publication number | Publication date |
---|---|
DE1224530B (en) | 1966-09-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1040674A (en) | Automatic correlation of spectral sensitivity with exposing light | |
USRE26763E (en) | Cameras with built-in plash assemblies | |
GB1431463A (en) | Zoom lens | |
GB1125731A (en) | Cinematographic or photographic camera | |
GB990683A (en) | Magazine-type transparency slide projector | |
US3035483A (en) | Ophthalmoscope having adjustable lamp and cooling vents | |
US1777257A (en) | Arrangement for holding object glasses in photographic or cinematographic apparatus | |
US3121379A (en) | Camera | |
US2519251A (en) | Johanson | |
US3162378A (en) | Slide projector with adjustable lamp support | |
US3178998A (en) | Photographic projector | |
US2334329A (en) | Variable aperture for optical projectors | |
US3677631A (en) | Lap dissolve slide projector with single shiftable slide tray | |
GB1207012A (en) | Overhead projector | |
US2216478A (en) | Cinematographic projector | |
US3121368A (en) | Slide projector | |
US3220325A (en) | Camera | |
US2460320A (en) | Motion-picture combination | |
US3402006A (en) | Motion picture projector | |
US3126787A (en) | Weiss | |
US1946139A (en) | Projector for double dissolving effects | |
CN204536710U (en) | Projector | |
US3094038A (en) | Dual purpose shutter arrangement for a slide projector | |
US2991656A (en) | Device for imparting a predetermined pattern of movement to an element | |
US3283650A (en) | Picture-slide conversion apparatus |