GB2009445B - Apparatus for bracing a panel which in itself is flat to produce a surfave which is curved in a circular cylindrical configuration - Google Patents

Apparatus for bracing a panel which in itself is flat to produce a surfave which is curved in a circular cylindrical configuration

Info

Publication number
GB2009445B
GB2009445B GB7845793A GB7845793A GB2009445B GB 2009445 B GB2009445 B GB 2009445B GB 7845793 A GB7845793 A GB 7845793A GB 7845793 A GB7845793 A GB 7845793A GB 2009445 B GB2009445 B GB 2009445B
Authority
GB
United Kingdom
Prior art keywords
surfave
bracing
curved
panel
flat
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
Application number
GB7845793A
Other languages
English (en)
Other versions
GB2009445A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Building Technologies AG
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
LGZ Landis and Gyr Zug AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Landis and Gyr AG, LGZ Landis and Gyr Zug AG filed Critical Landis and Gyr AG
Publication of GB2009445A publication Critical patent/GB2009445A/en
Application granted granted Critical
Publication of GB2009445B publication Critical patent/GB2009445B/en
Expired legal-status Critical Current

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)
GB7845793A 1977-12-01 1978-11-23 Apparatus for bracing a panel which in itself is flat to produce a surfave which is curved in a circular cylindrical configuration Expired GB2009445B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1469577A CH622359A5 (de) 1977-12-01 1977-12-01

Publications (2)

Publication Number Publication Date
GB2009445A GB2009445A (en) 1979-06-13
GB2009445B true GB2009445B (en) 1982-12-08

Family

ID=4403084

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7845793A Expired GB2009445B (en) 1977-12-01 1978-11-23 Apparatus for bracing a panel which in itself is flat to produce a surfave which is curved in a circular cylindrical configuration

Country Status (4)

Country Link
CH (1) CH622359A5 (de)
DE (1) DE2800259C2 (de)
FR (1) FR2410839A1 (de)
GB (1) GB2009445B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
FR2410839A1 (fr) 1979-06-29
FR2410839B3 (de) 1981-03-06
GB2009445A (en) 1979-06-13
DE2800259B1 (de) 1978-11-09
DE2800259C2 (de) 1979-07-19
CH622359A5 (de) 1981-03-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee