GB332882A - Improvements in or relating to projection screens - Google Patents

Improvements in or relating to projection screens

Info

Publication number
GB332882A
GB332882A GB80730A GB80730A GB332882A GB 332882 A GB332882 A GB 332882A GB 80730 A GB80730 A GB 80730A GB 80730 A GB80730 A GB 80730A GB 332882 A GB332882 A GB 332882A
Authority
GB
United Kingdom
Prior art keywords
loops
projection screens
relating
cord
frame
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
GB80730A
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.)
HENRY MATTHEW MITCHELSON
Original Assignee
HENRY MATTHEW MITCHELSON
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 HENRY MATTHEW MITCHELSON filed Critical HENRY MATTHEW MITCHELSON
Priority to GB80730A priority Critical patent/GB332882A/en
Publication of GB332882A publication Critical patent/GB332882A/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)
  • Springs (AREA)

Abstract

332,882. Bloor, H., and Mitchelson, H. M. Jan. 9, 1930. Projection screens 1 are mounted by means of a cord or the like 5 slidably threaded within a folded edge-piece 4 fixed round the screen, the cord being formed at intervals into loops 6 projecting through slots 7 and detachably connected by elastic members to a frame or the like 2. The elastic members may comprise coiled springs 8 which are fixed to the frame by screw eyes 9 and are formed with hooks Sa directly engaging the loops 6 or engaging metal rings 10 detachably connected to the loops.
GB80730A 1930-01-09 1930-01-09 Improvements in or relating to projection screens Expired GB332882A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB80730A GB332882A (en) 1930-01-09 1930-01-09 Improvements in or relating to projection screens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB80730A GB332882A (en) 1930-01-09 1930-01-09 Improvements in or relating to projection screens

Publications (1)

Publication Number Publication Date
GB332882A true GB332882A (en) 1930-07-31

Family

ID=9710836

Family Applications (1)

Application Number Title Priority Date Filing Date
GB80730A Expired GB332882A (en) 1930-01-09 1930-01-09 Improvements in or relating to projection screens

Country Status (1)

Country Link
GB (1) GB332882A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140368B (en) * 1958-06-24 1962-11-29 Lens N V Collapsible projection screen
CN106019792A (en) * 2009-06-12 2016-10-12 迪瑞波有限公司 Projection screen assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140368B (en) * 1958-06-24 1962-11-29 Lens N V Collapsible projection screen
CN106019792A (en) * 2009-06-12 2016-10-12 迪瑞波有限公司 Projection screen assembly
JP2017129867A (en) * 2009-06-12 2017-07-27 ドレイパー，インコーポレイテッド Tensioned projection screen assembly
US10018901B2 (en) 2009-06-12 2018-07-10 Draper, Inc. Tensioned projection screen assembly

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