GB986803A - Improvements in or relating to rear projection screens - Google Patents

Improvements in or relating to rear projection screens

Info

Publication number
GB986803A
GB986803A GB4309661A GB4309661A GB986803A GB 986803 A GB986803 A GB 986803A GB 4309661 A GB4309661 A GB 4309661A GB 4309661 A GB4309661 A GB 4309661A GB 986803 A GB986803 A GB 986803A
Authority
GB
United Kingdom
Prior art keywords
screen
cabinet
wall
rear projection
flap
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
GB4309661A
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.)
RONALD GODFREY WOODFORD
Original Assignee
RONALD GODFREY WOODFORD
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 RONALD GODFREY WOODFORD filed Critical RONALD GODFREY WOODFORD
Priority to GB4309661A priority Critical patent/GB986803A/en
Publication of GB986803A publication Critical patent/GB986803A/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
    • G03B21/14—Details
    • G03B21/30—Details adapted to collapse or fold, e.g. for portability
    • 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
    • G03B21/10—Projectors with built-in or built-on screen

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

986,803. Projection screens. R. G. WOODFORD. Nov. 30,1962 [Dec. 1,1961], No.43096/61. Heading G2J. A portable rear projection screen assembly comprises a cabinet 10 with a translucent screen 12 at the front, a back wall 18 carrying a reflector 20 and hinged about side edge 19 to swing out to an angle with the screen of less than 45 degrees, preferably 36 degrees, such that the entire beam from a projector at the side of the cabinet is deflected on to screen 12. Extraneous light is kept from screen 12 by flap 22 hinged to wall 18 at 22b,and by leather flaps 21 at top and bottom of the gap between cabinet and wall. Flap 22 has an aperture for the projection beam for which further flaps 24, 25, 28 and 30 form a box-like tunnel. The assembly folds down to make a suitcase for carrying, when a panel is slid between guides 15 to cover the screen. Specification 761,695 is referred to.
GB4309661A 1961-12-01 1961-12-01 Improvements in or relating to rear projection screens Expired GB986803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4309661A GB986803A (en) 1961-12-01 1961-12-01 Improvements in or relating to rear projection screens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4309661A GB986803A (en) 1961-12-01 1961-12-01 Improvements in or relating to rear projection screens

Publications (1)

Publication Number Publication Date
GB986803A true GB986803A (en) 1965-03-24

Family

ID=10427308

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4309661A Expired GB986803A (en) 1961-12-01 1961-12-01 Improvements in or relating to rear projection screens

Country Status (1)

Country Link
GB (1) GB986803A (en)

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