GB180836A - An improved safety shutter for cinematograph machines - Google Patents
An improved safety shutter for cinematograph machinesInfo
- Publication number
- GB180836A GB180836A GB1020321A GB1020321A GB180836A GB 180836 A GB180836 A GB 180836A GB 1020321 A GB1020321 A GB 1020321A GB 1020321 A GB1020321 A GB 1020321A GB 180836 A GB180836 A GB 180836A
- Authority
- GB
- United Kingdom
- Prior art keywords
- improved safety
- safety shutter
- cinematograph
- machines
- cinematograph machines
- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/18—Fire preventing or extinguishing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1020321A GB180836A (en) | 1921-04-06 | 1921-04-06 | An improved safety shutter for cinematograph machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1020321A GB180836A (en) | 1921-04-06 | 1921-04-06 | An improved safety shutter for cinematograph machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB180836A true GB180836A (en) | 1922-06-08 |
Family
ID=9963473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1020321A Expired GB180836A (en) | 1921-04-06 | 1921-04-06 | An improved safety shutter for cinematograph machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB180836A (en) |
-
1921
- 1921-04-06 GB GB1020321A patent/GB180836A/en not_active Expired
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