GB158142A - Improvements in or relating to screens for optical projection - Google Patents

Improvements in or relating to screens for optical projection

Info

Publication number
GB158142A
GB158142A GB2982419A GB2982419A GB158142A GB 158142 A GB158142 A GB 158142A GB 2982419 A GB2982419 A GB 2982419A GB 2982419 A GB2982419 A GB 2982419A GB 158142 A GB158142 A GB 158142A
Authority
GB
United Kingdom
Prior art keywords
screens
relating
optical projection
projection
optical
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
GB2982419A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2982419A priority Critical patent/GB158142A/en
Publication of GB158142A publication Critical patent/GB158142A/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)
GB2982419A 1919-11-29 1919-11-29 Improvements in or relating to screens for optical projection Expired GB158142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2982419A GB158142A (en) 1919-11-29 1919-11-29 Improvements in or relating to screens for optical projection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2982419A GB158142A (en) 1919-11-29 1919-11-29 Improvements in or relating to screens for optical projection

Publications (1)

Publication Number Publication Date
GB158142A true GB158142A (en) 1921-02-03

Family

ID=10297760

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2982419A Expired GB158142A (en) 1919-11-29 1919-11-29 Improvements in or relating to screens for optical projection

Country Status (1)

Country Link
GB (1) GB158142A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4574506A (en) * 1983-02-22 1986-03-11 Marler Haley Exposystems Limited Tensioning of flexible sheets across frames
CN108873588A (en) * 2018-09-13 2018-11-23 张家港宝视特影视器材有限公司 Simple wall curtain

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4574506A (en) * 1983-02-22 1986-03-11 Marler Haley Exposystems Limited Tensioning of flexible sheets across frames
CN108873588A (en) * 2018-09-13 2018-11-23 张家港宝视特影视器材有限公司 Simple wall curtain

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