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
Application number
FR787833726A
Other languages
French (fr)
Other versions
FR2410839A1 (fr
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr 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 filed Critical Landis and Gyr AG
Publication of FR2410839A1 publication Critical patent/FR2410839A1/fr
Application granted granted Critical
Publication of FR2410839B3 publication Critical patent/FR2410839B3/fr
Granted 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)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Projection Apparatus (AREA)
  • Transmission Devices (AREA)
FR7833726A 1977-12-01 1978-11-29 Dispositif permettant de deformer une plaque initialement plane pour produire une surface cintree en arc cylindrique de revolution Granted FR2410839A1 (fr)

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)

* 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
DE2800259B1 (de) 1978-11-09
FR2410839A1 (fr) 1979-06-29
CH622359A5 (ja) 1981-03-31
GB2009445A (en) 1979-06-13
DE2800259C2 (de) 1979-07-19
GB2009445B (en) 1982-12-08

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Legal Events

Date Code Title Description
ST Notification of lapse