FR2410839B3 - - Google Patents
Info
- Publication number
- FR2410839B3 FR2410839B3 FR787833726A FR7833726A FR2410839B3 FR 2410839 B3 FR2410839 B3 FR 2410839B3 FR 787833726 A FR787833726 A FR 787833726A FR 7833726 A FR7833726 A FR 7833726A FR 2410839 B3 FR2410839 B3 FR 2410839B3
- Authority
- FR
- France
- 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
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Transmission Devices (AREA)
- Projection Apparatus (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1469577A CH622359A5 (ja) | 1977-12-01 | 1977-12-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2410839A1 FR2410839A1 (fr) | 1979-06-29 |
FR2410839B3 true FR2410839B3 (ja) | 1981-03-06 |
Family
ID=4403084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7833726A Granted FR2410839A1 (fr) | 1977-12-01 | 1978-11-29 | Dispositif permettant de deformer une plaque initialement plane pour produire une surface cintree en arc cylindrique de revolution |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH622359A5 (ja) |
DE (1) | DE2800259C2 (ja) |
FR (1) | FR2410839A1 (ja) |
GB (1) | GB2009445B (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2104238B (en) * | 1981-08-21 | 1985-01-30 | Glaverbel | Composite mirror panels |
GB2426079A (en) * | 2005-05-12 | 2006-11-15 | Univ Warwick | Projector screen having a flat and a curved configuration |
WO2016082064A1 (zh) * | 2014-11-24 | 2016-06-02 | 潘有程 | 一种弧度可调的环幕投影屏 |
-
1977
- 1977-12-01 CH CH1469577A patent/CH622359A5/de not_active IP Right Cessation
-
1978
- 1978-01-04 DE DE2800259A patent/DE2800259C2/de not_active Expired
- 1978-11-23 GB GB7845793A patent/GB2009445B/en not_active Expired
- 1978-11-29 FR FR7833726A patent/FR2410839A1/fr active Granted
Also Published As
Publication number | Publication date |
---|---|
DE2800259B1 (de) | 1978-11-09 |
DE2800259C2 (de) | 1979-07-19 |
CH622359A5 (ja) | 1981-03-31 |
FR2410839A1 (fr) | 1979-06-29 |
GB2009445B (en) | 1982-12-08 |
GB2009445A (en) | 1979-06-13 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |