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GB348870A - Improvements in or relating to the optical projection screens used in cinematograph theatres - Google Patents

Improvements in or relating to the optical projection screens used in cinematograph theatres

Info

Publication number
GB348870A
GB348870A GB1426730A GB1426730A GB348870A GB 348870 A GB348870 A GB 348870A GB 1426730 A GB1426730 A GB 1426730A GB 1426730 A GB1426730 A GB 1426730A GB 348870 A GB348870 A GB 348870A
Authority
GB
United Kingdom
Prior art keywords
cinematograph
theatres
relating
openings
backing
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
GB1426730A
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.)
EDWARD CECIL MORRIS
Original Assignee
EDWARD CECIL MORRIS
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 EDWARD CECIL MORRIS filed Critical EDWARD CECIL MORRIS
Priority to GB1426730A priority Critical patent/GB348870A/en
Publication of GB348870A publication Critical patent/GB348870A/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
    • G03B21/565—Screens allowing free passage of sound

Landscapes

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

Abstract

348,870. Projection screens. MORRIS, E. C., Lencourt, Radford Marsh, Nottingham. May 9, 1930, No. 14267. [Class 97 (i)]. A white screen D is placed between an open-mesh projection screen A and a felt backing B having openings fitting one or more loud-speaker horns C; openings in the screen D are provided corresponding with the openings in the backing, and have panels E of fine white muslin or bolting cloth fitted in them. The screens A, D may be laced to hooks on a frame F or be otherwise detachably secured to the frame, the backing B being permanently secured to it.
GB1426730A 1930-05-09 1930-05-09 Improvements in or relating to the optical projection screens used in cinematograph theatres Expired GB348870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1426730A GB348870A (en) 1930-05-09 1930-05-09 Improvements in or relating to the optical projection screens used in cinematograph theatres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1426730A GB348870A (en) 1930-05-09 1930-05-09 Improvements in or relating to the optical projection screens used in cinematograph theatres

Publications (1)

Publication Number Publication Date
GB348870A true GB348870A (en) 1931-05-21

Family

ID=10038058

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1426730A Expired GB348870A (en) 1930-05-09 1930-05-09 Improvements in or relating to the optical projection screens used in cinematograph theatres

Country Status (1)

Country Link
GB (1) GB348870A (en)

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