GB419065A - Improvements relating to projection apparatus primarily for advertising - Google Patents
Improvements relating to projection apparatus primarily for advertisingInfo
- Publication number
- GB419065A GB419065A GB1243833A GB1243833A GB419065A GB 419065 A GB419065 A GB 419065A GB 1243833 A GB1243833 A GB 1243833A GB 1243833 A GB1243833 A GB 1243833A GB 419065 A GB419065 A GB 419065A
- Authority
- GB
- United Kingdom
- Prior art keywords
- teeth
- band
- projection apparatus
- tracks
- frames
- 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
- G03B23/08—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier
- G03B23/12—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier linear strip carrier
- G03B23/125—Devices for changing pictures in viewing apparatus or projectors in which pictures are attached to a movable carrier linear strip carrier the pictures being attached to a chain or linked up to form a chain
Abstract
419,065. Changing signs. CHAMBERLAIN, R. M., 1, Billett Avenue, Waterlooville, Hampshire. April 28, 1933, No. 12438. [Class 3 (i).] Optical - projection apparatus.-Glass transparencies are removably held in brass &c. frames 12 mounted in rectangular holes in a flexible steel band 10 provided with a row of perforations 11 along each edge for engagement by teeth 5<a> on mutilated uniformly revolving wheels 6. The teeth 5<a> taper off in height toward the mutilation to facilitate re-engagement with the band 10, and the number of teeth is that required to advance the band through the gate by the distance separating each pair of transparencies. The frames 12 have an open side 12<a> for insertion of the transparency, tabs 12b being bent up for retention. The gate comprises two parts 2, 13 hinged together, the band edges running between two tracks 3 on the fixed part 2 and two spring-pressed slides 16 on the part 13. Gaps in the tracks 3 admit the teeth 5<a>, and leaf springs 17<a> press the band edges on to the teeth 5a. The ends of the band 10 may be secured together to make it endless by inserting a frame 12 through two overlapping holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1243833A GB419065A (en) | 1933-04-28 | 1933-04-28 | Improvements relating to projection apparatus primarily for advertising |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1243833A GB419065A (en) | 1933-04-28 | 1933-04-28 | Improvements relating to projection apparatus primarily for advertising |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB419065A true GB419065A (en) | 1934-10-29 |
Family
ID=10004601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1243833A Expired GB419065A (en) | 1933-04-28 | 1933-04-28 | Improvements relating to projection apparatus primarily for advertising |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB419065A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4417792A (en) * | 1980-06-04 | 1983-11-29 | Martin Liesel | Device for mounting diapositives in a strip and an apparatus for projecting the strip-mounted diapositives |
-
1933
- 1933-04-28 GB GB1243833A patent/GB419065A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4417792A (en) * | 1980-06-04 | 1983-11-29 | Martin Liesel | Device for mounting diapositives in a strip and an apparatus for projecting the strip-mounted diapositives |
| US4431282A (en) * | 1980-06-04 | 1984-02-14 | Martin Liesel | Device for mounting diapositives in a strip and an apparatus for projecting the strip-mounted diapositives |
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