BE347185A - - Google Patents
Info
- Publication number
- BE347185A BE347185A BE347185DA BE347185A BE 347185 A BE347185 A BE 347185A BE 347185D A BE347185D A BE 347185DA BE 347185 A BE347185 A BE 347185A
- Authority
- BE
- Belgium
- Prior art keywords
- views
- projection
- slide
- chamber
- opaque
- Prior art date
Links
- 238000005286 illumination Methods 0.000 claims description 3
- 239000010425 asbestos Substances 0.000 claims description 2
- 239000012141 concentrate Substances 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 2
- 239000003610 charcoal Substances 0.000 claims 1
- 238000003303 reheating Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE347185A true BE347185A (pm) |
Family
ID=22891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE347185D BE347185A (pm) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE347185A (pm) |
-
0
- BE BE347185D patent/BE347185A/fr unknown
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