DE206079C - - Google Patents
Info
- Publication number
- DE206079C DE206079C DENDAT206079D DE206079DA DE206079C DE 206079 C DE206079 C DE 206079C DE NDAT206079 D DENDAT206079 D DE NDAT206079D DE 206079D A DE206079D A DE 206079DA DE 206079 C DE206079 C DE 206079C
- Authority
- DE
- Germany
- Prior art keywords
- fire
- flaps
- book
- automatically
- closed
- 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.)
- Active
Links
- 239000004744 fabric Substances 0.000 claims 1
- 229920002160 Celluloid Polymers 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
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)
- Absorbent Articles And Supports Therefor (AREA)
Publications (1)
Publication Number | Publication Date |
---|---|
DE206079C true DE206079C (enrdf_load_stackoverflow) |
Family
ID=468282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT206079D Active DE206079C (enrdf_load_stackoverflow) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE206079C (enrdf_load_stackoverflow) |
-
0
- DE DENDAT206079D patent/DE206079C/de active Active
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