GB533683A - Improved apparatus for screening projected film pictures - Google Patents

Improved apparatus for screening projected film pictures

Info

Publication number
GB533683A
GB533683A GB29990/39A GB2999039A GB533683A GB 533683 A GB533683 A GB 533683A GB 29990/39 A GB29990/39 A GB 29990/39A GB 2999039 A GB2999039 A GB 2999039A GB 533683 A GB533683 A GB 533683A
Authority
GB
United Kingdom
Prior art keywords
screen
mirror
held
screening
improved apparatus
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
GB29990/39A
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
Publication of GB533683A publication Critical patent/GB533683A/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
    • G03B21/10—Projectors with built-in or built-on screen
    • 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
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

533,683. Projection screens. PIMBLETT, L. G. Nov. 13, 1939, Nos. 29990 and 29991. Convention dates, Dec. 3, 1938 and Aug. 9, 1939. [Class 97 (i)] A projection screen 7, viewed in a direction 8 by reflection in a mirror 9, is adjustable about hinges 10, and is held in adjusted position by a corrugated leaf spring 12, or by pegs through holes in a proscenium 11, or by other means. The screen may be glass frosted on one or both sides. The mirror 9 may be hinged and held similarly to the screen, or may consist of a number of strips 15, Fig. 3, having their upper edges 16 bevelled and held by slots 18 in end brackets 17. A speaker horn 13 may be carried by a sounding board 14. The beam 5 from the projector 6 may reach the screen 7 directly, or by reflection in a mirror.
GB29990/39A 1938-12-03 1939-11-13 Improved apparatus for screening projected film pictures Expired GB533683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU533683X 1938-12-03

Publications (1)

Publication Number Publication Date
GB533683A true GB533683A (en) 1941-02-18

Family

ID=3739364

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29990/39A Expired GB533683A (en) 1938-12-03 1939-11-13 Improved apparatus for screening projected film pictures

Country Status (1)

Country Link
GB (1) GB533683A (en)

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